Refactor scheduling reconciliation into change plans

README.md

@@ -82,10 +82,12 @@ uses Poll context fields to point back to its request or proposal resource.
 Typical workflow steps are collect availability, rank candidates, decide, notify
 participants, and hand off to Calendar or Appointments.
 
-The manifest declares `access` and `evaluation` as optional dependencies.
-Scheduling may use Access for identity, groups, and permissions, and may trigger
-post-event or post-appointment feedback through Evaluation. It must not require
-either module just to find a meeting time.
+The manifest declares `access`, `addresses`, and `evaluation` as optional
+dependencies. Scheduling uses Core's principal-aware people-search boundary to
+combine only the account and contact records visible to the current organizer;
+it never calls the instance-wide Identity search. It may trigger post-event or
+post-appointment feedback through Evaluation, and must not require any of these
+optional modules just to find a meeting time.
 
 ## Expected Integrations
 
@@ -98,6 +100,22 @@ either module just to find a meeting time.
 - `govoplan-portal`: external participant scheduling flows
 - `govoplan-workflow` and `govoplan-tasks`: follow-up work after a time is selected
 
+## Participant selection boundary
+
+The editor uses Core's shared `PeoplePicker`. Its server-side search aggregates
+the optional `access.people_search` and `addresses.people_search` capabilities,
+and each provider applies the active principal and tenant visibility rules
+before returning a candidate. Scheduling exposes only the fields needed to
+select a person; provider provenance, address-book topology, group membership,
+and other internals are not returned by its picker endpoint.
+
+An account selection becomes an internal participant bound to that account.
+A visible address-book contact becomes an external participant with a bounded
+directory-selection reference and revision for later organizer editing. Manual
+name-and-email entry is available only while the request allows external
+participants. The picker stores neither provider-internal provenance nor a
+global Identity record reference in participant metadata.
+
 ## First Package Scaffold Decision
 
 The first backend implementation slice adds runtime APIs and storage around
@@ -109,12 +127,147 @@ poll-backed scheduling requests:
 - request lifecycle APIs: draft, collecting, closed, decided, handed off, cancelled
 - result summaries sourced from Poll response aggregation
 - optional Calendar free/busy checks, tentative holds, and final event creation
-- notification outbox jobs for invitations, reminders, decisions, and cancellations
+- notification outbox jobs for invitations, reminders, decisions,
+  cancellations, and participant access changes
 - a first Scheduling WebUI package with request creation, slot matrix, Calendar
   actions, decisions, and notification-job creation
 
-The next slices should add real notification delivery workers, richer public
-participant pages, Calendar hold cleanup after decision, and advanced scoring
-constraints such as required participants and quorum rules.
+The next slices should add generic self-enrolment links after their abuse and
+identity policy is agreed, Calendar hold cleanup after decision, and advanced
+scoring constraints such as required participants and quorum rules.
 
 The active backlog lives in Gitea issues.
+
+## Signed-participation policy gate
+
+Scheduling persists the response policy and snapshots it onto each governed
+Poll invitation. Public access uses
+`/scheduling/public/{request_id}/{token}`; Poll's ordinary public routes reject
+these gateway-bound tokens, so callers cannot bypass Scheduling's password and
+request checks. Passwords are write-only, stored only as salted PBKDF2 hashes,
+and failed checks are throttled through Redis when configured with a bounded
+in-process fallback.
+
+Poll is the transactional authority for response rules. Its governed submission
+holds the Poll-row lock while enforcing single choice, `Maybe`, participant
+email, comments, idempotency and per-option capacity. Scheduling then updates
+its participant projection in the same database transaction. Candidate-slot
+add/remove and participant-link revocation also go through the governed Poll
+capability; exact retries are idempotent, and option mutations invalidate only
+the affected answers.
+
+Public submissions lock the Scheduling request and participant rows before
+entering Poll, matching organizer edit lock order and making first-use email
+binding atomic. Both authenticated and public submission paths independently
+require the Scheduling request to be collecting and its deadline not to have
+passed, so a stale or incorrectly reopened Poll projection cannot accept a
+response. Changing a request deadline transactionally updates each governed
+invitation's expiry in Poll under owner- and gateway-bound row locks. The same
+link and invitation identity survive future, past, extended, and cleared
+deadlines: a past deadline makes the link unusable, a later extension makes the
+same link usable again, and clearing the deadline removes its expiry. No raw
+replacement token crosses the PATCH response, and existing responses plus
+participant status remain attached to the same durable respondent identity.
+
+Cancellation closes the backing Poll, so submission fails, while active links
+remain usable as a reduced cancellation notice for a bounded period. The
+deployment setting `SCHEDULING_CANCELLATION_NOTICE_DAYS` defaults to 30 and is
+bounded to 1–90 days. Cancellation transactionally aligns governed invitation
+expiry with that timestamp. The public projection contains only the request
+title and cancellation timestamps; descriptions, locations, candidate slots,
+comments, and previous answers are omitted. After the bound, access fails with
+the same generic response as an invalid or expired link.
+
+If the governed capability is absent, API responses advertise that policy
+enforcement is unavailable and restricted links fail closed. Plaintext
+passwords, token hashes, response-gateway internals and the participant roster
+are not exposed by the public response model.
+
+Authenticated participant list/detail projections likewise omit tenant,
+organizer, Poll and Calendar identifiers, connector metadata, invitation and
+identity bindings. Free/busy conflicts are reduced to useful time/status
+fields. Organizers and scheduling administrators retain the full management
+projection; participants retain candidate-slot revisions, their own marker and
+email, response settings, aggregates, and any roster names/statuses permitted
+by the configured privacy policy.
+
+The WebUI package registers `/scheduling/public/{request}/{token}` through
+Core's explicit, backend-allowlisted public-route contract. The guest page uses
+the shared UI components, prompts for email/password only when needed, prefills
+an existing response, and enforces the snapshotted response rules. The token
+stays in the path and is never copied into query parameters or browser storage.
+Signed-in users also receive an in-app deep link without weakening the signed
+guest-link boundary.
+
+Creating, editing, and opening a request never issue public tokens or enqueue
+invitation delivery. The deprecated `create_participant_invitations` request
+field remains accepted for compatibility, defaults to `false`, and has no side
+effect. Authenticated in-module responses can still lazily create a
+gateway-bound invitation whose token is discarded.
+
+Organizers and Scheduling administrators use the participant-specific
+invitation action instead:
+
+- `POST /scheduling/requests/{request_id}/participants/{participant_id}/invitation`
+  with `{"action":"copy","participant_revision":"..."}` rotates the previous
+  invitation and returns the new relative action URL once. The response is
+  marked `no-store`.
+- The same endpoint with `{"action":"send"}` rotates the invitation and passes
+  its URL directly to the notification dispatch job; it also requires the
+  current `participant_revision`. Neither the API response nor Scheduling's
+  durable notification projection contains the token.
+- `DELETE` on the same resource uses a JSON body containing the current
+  `participant_revision` and revokes the active link immediately. A revoke
+  against the refreshed no-link projection is an idempotent replay.
+
+The semantic participant revision includes the current invitation identity.
+It is checked after the participant row is locked, so stale copy, send, and
+revoke commands return `409` before rotating a newer link or delivering to a
+changed recipient.
+
+The participant DataGrid presents copy, send, and revoke as a fixed icon-only
+action group. Authorized but unavailable actions remain visible and explain
+why they are disabled: for example, delivery is disabled without a dispatch
+provider or recipient target, and revoke is disabled when no active link
+exists. The delivery capability is exposed only in management projections.
+Copy accepts only the same-origin Scheduling public path and does not persist
+the bearer URL in component state, logs, or browser storage.
+
+Links can be issued in any request state. Collection state and deadline checks
+remain independent submission requirements, so a link to a draft, closed, or
+decided request is read-only. Issue, copy, send-request, and revoke actions are
+audited with request and participant identifiers but never a bearer token.
+Only an organizer (under the ordinary Scheduling write policy) or a tenant-wide
+Scheduling administrator can use these actions. If notification delivery is
+not installed, `send` fails before rotating the current link and the organizer
+can use `copy` for separate distribution.
+
+Participant edits carry a semantic revision so a stale organizer form cannot
+overwrite an invitation or response change. Corrections that retain a stable
+account or directory identity update the existing participant. A display-name
+correction keeps its invitation; changing a delivery email revokes the stale
+link but keeps a response tied to the unchanged account identity.
+
+Changing the canonical identity creates a new participant instead of assigning
+the former participant's response to another person. In the same transaction,
+Scheduling revokes the old invitation and Poll soft-deletes every matching
+live response. Poll retains the answers and a bounded retirement record for
+audit, while result summaries and capacity checks immediately exclude them.
+Removing an invited or responding participant follows the same retirement
+path. Scheduling records privacy-safe audit facts and queues a removal or
+replacement notice to the former recipient without placing email addresses or
+response contents in the audit event.
+
+## FieldLabel omission register
+
+Scheduling uses the shared `FieldLabel` for form controls that need explanatory
+inline help. The only intentional omissions are:
+
+- Candidate-slot and participant DataGrid cells: column headers supply the
+  visible label and each interactive cell has an accessible name.
+- Per-slot availability selects: the enclosing visible slot/date text is the
+  native label for that individual choice.
+
+There are no other authorized Scheduling omissions. Inline help remains
+controlled by the user's shared interface setting; hiding it does not remove
+accessible labels.

pyproject.toml

@@ -4,15 +4,15 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "govoplan-scheduling"
-version = "0.1.9"
+version = "0.1.11"
 description = "GovOPlaN meeting scheduling and Terminfindung module seed."
 readme = "README.md"
 requires-python = ">=3.12"
 license = { file = "LICENSE" }
 authors = [{ name = "GovOPlaN" }]
 dependencies = [
-  "govoplan-core>=0.1.9",
-  "govoplan-poll>=0.1.9",
+  "govoplan-core>=0.1.11",
+  "govoplan-poll>=0.1.11",
 ]
 
 [tool.setuptools.packages.find]

src/govoplan_scheduling/__init__.py

@@ -2,4 +2,4 @@
 
 __all__ = ["__version__"]
 
-__version__ = "0.1.9"
+__version__ = "0.1.11"

src/govoplan_scheduling/backend/db/models.py

@@ -37,6 +37,14 @@ class SchedulingRequest(Base, TimestampMixin):
     allow_participant_updates: Mapped[bool] = mapped_column(Boolean, default=True, nullable=False)
     result_visibility: Mapped[str] = mapped_column(String(30), default="after_close", nullable=False)
     participant_visibility: Mapped[str] = mapped_column(String(32), default="aggregates_only", nullable=False)
+    notify_on_answers: Mapped[bool] = mapped_column(Boolean, default=True, nullable=False)
+    single_choice: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
+    max_participants_per_option: Mapped[int | None] = mapped_column(Integer, nullable=True)
+    allow_maybe: Mapped[bool] = mapped_column(Boolean, default=True, nullable=False)
+    allow_comments: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
+    participant_email_required: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
+    anonymous_password_protection_enabled: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
+    anonymous_password_hash: Mapped[str | None] = mapped_column(String(500), nullable=True)
     calendar_integration_enabled: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
     calendar_id: Mapped[str | None] = mapped_column(String(36), nullable=True, index=True)
     calendar_freebusy_enabled: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
@@ -45,6 +53,7 @@ class SchedulingRequest(Base, TimestampMixin):
     calendar_event_id: Mapped[str | None] = mapped_column(String(36), nullable=True, index=True)
     handed_off_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
     cancelled_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+    cancellation_notice_until: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
     deleted_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True, index=True)
     metadata_: Mapped[dict[str, Any] | None] = mapped_column("metadata", JSON, nullable=True)
 
@@ -106,8 +115,10 @@ class SchedulingParticipant(Base, TimestampMixin):
     required: Mapped[bool] = mapped_column(Boolean, default=True, nullable=False)
     status: Mapped[str] = mapped_column(String(40), default="invited", nullable=False, index=True)
     poll_invitation_id: Mapped[str | None] = mapped_column(String(36), nullable=True, index=True)
+    participation_gateway: Mapped[str | None] = mapped_column(String(40), nullable=True)
     last_invited_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
     responded_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+    response_comment: Mapped[str | None] = mapped_column(Text, nullable=True)
     deleted_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True, index=True)
     metadata_: Mapped[dict[str, Any] | None] = mapped_column("metadata", JSON, nullable=True)
 

src/govoplan_scheduling/backend/manifest.py

@@ -8,6 +8,7 @@ from govoplan_core.core.module_guards import drop_table_retirement_provider, per
 from govoplan_core.core.modules import (
     DocumentationTopic,
     FrontendModule,
+    FrontendRoute,
     MigrationSpec,
     ModuleContext,
     ModuleInterfaceProvider,
@@ -15,16 +16,23 @@ from govoplan_core.core.modules import (
     ModuleManifest,
     NavItem,
     PermissionDefinition,
+    PublicFrontendRoute,
     RoleTemplate,
 )
-from govoplan_core.db.base import Base
+from govoplan_core.core.people import (
+    CAPABILITY_ACCESS_PEOPLE_SEARCH,
+    CAPABILITY_ADDRESSES_PEOPLE_SEARCH,
+)
 from govoplan_core.core.poll import CAPABILITY_POLL_SCHEDULING
+from govoplan_core.core.poll_participation import CAPABILITY_POLL_PARTICIPATION_GATEWAY
 from govoplan_core.core.policy import CAPABILITY_POLICY_SCHEDULING_PARTICIPANT_PRIVACY
+from govoplan_core.core.views import ViewSurface
+from govoplan_core.db.base import Base
 from govoplan_scheduling.backend.db import models as scheduling_models  # noqa: F401 - populate Scheduling ORM metadata
 
 MODULE_ID = "scheduling"
 MODULE_NAME = "Scheduling"
-MODULE_VERSION = "0.1.9"
+MODULE_VERSION = "0.1.11"
 READ_SCOPE = "scheduling:schedule:read"
 WRITE_SCOPE = "scheduling:schedule:write"
 ADMIN_SCOPE = "scheduling:schedule:admin"
@@ -47,8 +55,8 @@ def _permission(scope: str, label: str, description: str) -> PermissionDefinitio
 
 PERMISSIONS = (
     _permission(READ_SCOPE, "View scheduling", "Read scheduling polls, proposals, participant state, and selected outcomes."),
-    _permission(WRITE_SCOPE, "Manage scheduling", "Create and update scheduling polls, candidate slots, reminders, and decision handoff."),
-    _permission(ADMIN_SCOPE, "Administer scheduling", "Configure tenant-level scheduling policies, external participation, and retention defaults."),
+    _permission(WRITE_SCOPE, "Manage own scheduling", "Create scheduling polls and manage requests for which the account is the organizer."),
+    _permission(ADMIN_SCOPE, "Administer scheduling", "Manage every tenant scheduling request and configure scheduling policies, external participation, and retention defaults."),
     _permission(RESPOND_SCOPE, "Respond to scheduling polls", "Submit and update own scheduling availability responses."),
 )
 
@@ -56,7 +64,7 @@ ROLE_TEMPLATES = (
     RoleTemplate(
         slug="scheduling_manager",
         name="Scheduling manager",
-        description="Create scheduling polls, manage candidate slots, and decide outcomes.",
+        description="Create scheduling polls and manage candidate slots and outcomes for requests the account organizes.",
         permissions=(READ_SCOPE, WRITE_SCOPE, RESPOND_SCOPE),
     ),
     RoleTemplate(
@@ -136,20 +144,27 @@ manifest = ModuleManifest(
         CAPABILITY_AUTH_PERMISSION_EVALUATOR,
         CAPABILITY_CALENDAR_SCHEDULING,
         CAPABILITY_POLICY_SCHEDULING_PARTICIPANT_PRIVACY,
+        CAPABILITY_ACCESS_PEOPLE_SEARCH,
+        CAPABILITY_ADDRESSES_PEOPLE_SEARCH,
+    ),
+    required_capabilities=(
+        CAPABILITY_POLL_SCHEDULING,
+        CAPABILITY_POLL_PARTICIPATION_GATEWAY,
     ),
-    required_capabilities=(CAPABILITY_POLL_SCHEDULING,),
     provides_interfaces=(
-        ModuleInterfaceProvider(name="scheduling.candidate_slots", version="0.1.9"),
-        ModuleInterfaceProvider(name="scheduling.decision_handoff", version="0.1.9"),
+        ModuleInterfaceProvider(name="scheduling.candidate_slots", version=MODULE_VERSION),
+        ModuleInterfaceProvider(name="scheduling.decision_handoff", version=MODULE_VERSION),
     ),
     requires_interfaces=(
-        ModuleInterfaceRequirement(name="poll.availability_matrix", version_min="0.1.9", version_max_exclusive="0.2.0"),
-        ModuleInterfaceRequirement(name="poll.response_collection", version_min="0.1.9", version_max_exclusive="0.2.0"),
-        ModuleInterfaceRequirement(name="poll.workflow_context", version_min="0.1.9", version_max_exclusive="0.2.0"),
-        ModuleInterfaceRequirement(name="poll.signed_participation", version_min="0.1.8", version_max_exclusive="0.2.0", optional=True),
+        ModuleInterfaceRequirement(name="poll.option_ordering", version_min="0.1.11", version_max_exclusive="0.2.0"),
+        ModuleInterfaceRequirement(name="poll.availability_matrix", version_min="0.1.11", version_max_exclusive="0.2.0"),
+        ModuleInterfaceRequirement(name="poll.response_collection", version_min="0.1.11", version_max_exclusive="0.2.0"),
+        ModuleInterfaceRequirement(name="poll.workflow_context", version_min="0.1.11", version_max_exclusive="0.2.0"),
+        ModuleInterfaceRequirement(name="poll.governed_participation", version_min="0.1.11", version_max_exclusive="0.2.0"),
         ModuleInterfaceRequirement(name="evaluation.feedback", version_min="0.1.8", version_max_exclusive="0.2.0", optional=True),
         ModuleInterfaceRequirement(name="notifications.dispatch", version_min="0.1.8", version_max_exclusive="0.2.0", optional=True),
-        ModuleInterfaceRequirement(name="addresses.lookup", version_min="0.1.0", version_max_exclusive="0.2.0", optional=True),
+        ModuleInterfaceRequirement(name=CAPABILITY_ACCESS_PEOPLE_SEARCH, version_min="0.1.0", version_max_exclusive="0.2.0", optional=True),
+        ModuleInterfaceRequirement(name=CAPABILITY_ADDRESSES_PEOPLE_SEARCH, version_min="0.1.0", version_max_exclusive="0.2.0", optional=True),
         ModuleInterfaceRequirement(name="calendar.scheduling", version_min="0.1.8", version_max_exclusive="0.2.0", optional=True),
     ),
     permissions=PERMISSIONS,
@@ -158,7 +173,31 @@ manifest = ModuleManifest(
     frontend=FrontendModule(
         module_id=MODULE_ID,
         package_name="@govoplan/scheduling-webui",
+        routes=(
+            FrontendRoute(
+                path="/scheduling",
+                component="SchedulingPage",
+                required_any=(READ_SCOPE,),
+                order=56,
+            ),
+        ),
+        public_routes=(
+            PublicFrontendRoute(
+                path="/scheduling/public/:requestId/:token",
+                component="SchedulingPublicPage",
+                order=10,
+            ),
+        ),
         nav_items=(NavItem(path="/scheduling", label="Scheduling", icon="calendar-clock", required_any=(READ_SCOPE,), order=56),),
+        view_surfaces=(
+            ViewSurface(
+                id="scheduling.widget.open-requests",
+                module_id=MODULE_ID,
+                kind="section",
+                label="Scheduling requests widget",
+                order=45,
+            ),
+        ),
     ),
     route_factory=_scheduling_router,
     tenant_summary_providers=(_tenant_summary,),

src/govoplan_scheduling/backend/migrations/versions/ad7e3c9b2f10_v0110_scheduling_response_settings.py

@@ -0,0 +1,168 @@
+"""v0.1.10 scheduling response settings
+
+Revision ID: ad7e3c9b2f10
+Revises: 9c2f4a7d1e6b
+Create Date: 2026-07-21 00:00:00.000000
+"""
+from __future__ import annotations
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision = "ad7e3c9b2f10"
+down_revision = "9c2f4a7d1e6b"
+branch_labels = None
+depends_on = None
+
+
+_REQUEST_COLUMNS = (
+    "notify_on_answers",
+    "single_choice",
+    "max_participants_per_option",
+    "allow_maybe",
+    "allow_comments",
+    "participant_email_required",
+    "anonymous_password_protection_enabled",
+    "anonymous_password_hash",
+)
+
+
+def _adopted_columns(inspector: sa.Inspector, table_name: str, names: tuple[str, ...]) -> bool:
+    columns = {item["name"]: item for item in inspector.get_columns(table_name)}
+    present = [name for name in names if name in columns]
+    if not present:
+        return False
+    if len(present) != len(names):
+        missing = sorted(set(names) - set(present))
+        raise RuntimeError(
+            f"Cannot adopt partial {table_name} scheduling response settings; missing columns: "
+            + ", ".join(missing)
+        )
+    return True
+
+
+def _require_compatible_adopted_schema(inspector: sa.Inspector) -> None:
+    request_columns = {
+        item["name"]: item
+        for item in inspector.get_columns("scheduling_requests")
+    }
+    for name in (
+        "notify_on_answers",
+        "single_choice",
+        "allow_maybe",
+        "allow_comments",
+        "participant_email_required",
+        "anonymous_password_protection_enabled",
+    ):
+        column = request_columns[name]
+        if column.get("nullable") or not isinstance(column["type"], sa.Boolean):
+            raise RuntimeError(
+                f"Cannot adopt scheduling_requests.{name} because its schema is unexpected"
+            )
+    capacity = request_columns["max_participants_per_option"]
+    if not capacity.get("nullable") or not isinstance(capacity["type"], sa.Integer):
+        raise RuntimeError(
+            "Cannot adopt scheduling_requests.max_participants_per_option because its schema is unexpected"
+        )
+    password_hash = request_columns["anonymous_password_hash"]
+    if (
+        not password_hash.get("nullable")
+        or not isinstance(password_hash["type"], sa.String)
+        or password_hash["type"].length != 500
+    ):
+        raise RuntimeError(
+            "Cannot adopt scheduling_requests.anonymous_password_hash because its schema is unexpected"
+        )
+    participant_columns = {
+        item["name"]: item
+        for item in inspector.get_columns("scheduling_participants")
+    }
+    comment = participant_columns["response_comment"]
+    if not comment.get("nullable") or not isinstance(comment["type"], sa.Text):
+        raise RuntimeError(
+            "Cannot adopt scheduling_participants.response_comment because its schema is unexpected"
+        )
+    gateway = participant_columns["participation_gateway"]
+    if (
+        not gateway.get("nullable")
+        or not isinstance(gateway["type"], sa.String)
+        or gateway["type"].length != 40
+    ):
+        raise RuntimeError(
+            "Cannot adopt scheduling_participants.participation_gateway because its schema is unexpected"
+        )
+
+
+def upgrade() -> None:
+    inspector = sa.inspect(op.get_bind())
+    request_columns_present = _adopted_columns(
+        inspector,
+        "scheduling_requests",
+        _REQUEST_COLUMNS,
+    )
+    participant_columns_present = _adopted_columns(
+        inspector,
+        "scheduling_participants",
+        ("response_comment", "participation_gateway"),
+    )
+    if request_columns_present != participant_columns_present:
+        raise RuntimeError(
+            "Cannot adopt partial scheduling response settings across request and participant tables"
+        )
+    if request_columns_present:
+        _require_compatible_adopted_schema(inspector)
+        return
+
+    op.add_column(
+        "scheduling_requests",
+        sa.Column("notify_on_answers", sa.Boolean(), nullable=False, server_default=sa.true()),
+    )
+    op.add_column(
+        "scheduling_requests",
+        sa.Column("single_choice", sa.Boolean(), nullable=False, server_default=sa.false()),
+    )
+    op.add_column(
+        "scheduling_requests",
+        sa.Column("max_participants_per_option", sa.Integer(), nullable=True),
+    )
+    op.add_column(
+        "scheduling_requests",
+        sa.Column("allow_maybe", sa.Boolean(), nullable=False, server_default=sa.true()),
+    )
+    op.add_column(
+        "scheduling_requests",
+        sa.Column("allow_comments", sa.Boolean(), nullable=False, server_default=sa.false()),
+    )
+    op.add_column(
+        "scheduling_requests",
+        sa.Column("participant_email_required", sa.Boolean(), nullable=False, server_default=sa.false()),
+    )
+    op.add_column(
+        "scheduling_requests",
+        sa.Column(
+            "anonymous_password_protection_enabled",
+            sa.Boolean(),
+            nullable=False,
+            server_default=sa.false(),
+        ),
+    )
+    op.add_column(
+        "scheduling_requests",
+        sa.Column("anonymous_password_hash", sa.String(length=500), nullable=True),
+    )
+    op.add_column(
+        "scheduling_participants",
+        sa.Column("response_comment", sa.Text(), nullable=True),
+    )
+    op.add_column(
+        "scheduling_participants",
+        sa.Column("participation_gateway", sa.String(length=40), nullable=True),
+    )
+
+
+def downgrade() -> None:
+    op.drop_column("scheduling_participants", "participation_gateway")
+    op.drop_column("scheduling_participants", "response_comment")
+    for name in reversed(_REQUEST_COLUMNS):
+        op.drop_column("scheduling_requests", name)

src/govoplan_scheduling/backend/migrations/versions/be8f4d2c1a70_v0110_scheduling_participation_gateway_repair.py

@@ -0,0 +1,65 @@
+"""v0.1.10 scheduling participation gateway schema repair
+
+Revision ID: be8f4d2c1a70
+Revises: ad7e3c9b2f10
+Create Date: 2026-07-22 00:00:00.000000
+
+Some development databases were stamped at ``ad7e3c9b2f10`` before the
+``scheduling_participants.participation_gateway`` column was present.  A
+forward repair is required because Alembic correctly does not replay an
+already-recorded revision.  The column is nullable, so adding it preserves all
+existing participant rows without inventing gateway ownership for legacy
+invitations.
+"""
+from __future__ import annotations
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision = "be8f4d2c1a70"
+down_revision = "ad7e3c9b2f10"
+branch_labels = None
+depends_on = None
+
+
+def _require_compatible_column(column: dict[str, object]) -> None:
+    column_type = column["type"]
+    if (
+        not column.get("nullable")
+        or not isinstance(column_type, sa.String)
+        or column_type.length != 40
+    ):
+        raise RuntimeError(
+            "Cannot adopt scheduling_participants.participation_gateway "
+            "because its schema is unexpected"
+        )
+
+
+def upgrade() -> None:
+    inspector = sa.inspect(op.get_bind())
+    if "scheduling_participants" not in inspector.get_table_names():
+        raise RuntimeError(
+            "Cannot repair Scheduling participation gateways because "
+            "scheduling_participants is missing"
+        )
+
+    columns = {
+        item["name"]: item
+        for item in inspector.get_columns("scheduling_participants")
+    }
+    existing = columns.get("participation_gateway")
+    if existing is not None:
+        _require_compatible_column(existing)
+        return
+
+    op.add_column(
+        "scheduling_participants",
+        sa.Column("participation_gateway", sa.String(length=40), nullable=True),
+    )
+
+
+def downgrade() -> None:
+    # ad7e3c9b2f10 already owns this column in the canonical schema.  The repair
+    # revision must therefore not remove it when returning to that revision.
+    pass

src/govoplan_scheduling/backend/migrations/versions/c9d4e7f1a2b3_v0111_scheduling_cancellation_notice.py

@@ -0,0 +1,43 @@
+"""v0.1.11 bounded scheduling cancellation notice
+
+Revision ID: c9d4e7f1a2b3
+Revises: be8f4d2c1a70
+Create Date: 2026-07-22 00:00:00.000000
+"""
+from __future__ import annotations
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision = "c9d4e7f1a2b3"
+down_revision = "be8f4d2c1a70"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    inspector = sa.inspect(op.get_bind())
+    columns = {
+        item["name"]: item
+        for item in inspector.get_columns("scheduling_requests")
+    }
+    existing = columns.get("cancellation_notice_until")
+    if existing is not None:
+        if (
+            not existing.get("nullable")
+            or not isinstance(existing["type"], sa.DateTime)
+        ):
+            raise RuntimeError(
+                "Cannot adopt scheduling_requests.cancellation_notice_until "
+                "because its schema is unexpected"
+            )
+        return
+    op.add_column(
+        "scheduling_requests",
+        sa.Column("cancellation_notice_until", sa.DateTime(timezone=True), nullable=True),
+    )
+
+
+def downgrade() -> None:
+    op.drop_column("scheduling_requests", "cancellation_notice_until")

src/govoplan_scheduling/backend/router.py

@@ -1,31 +1,39 @@
 from __future__ import annotations
 
-import dataclasses
 from typing import Any
 
-from fastapi import APIRouter, Depends, HTTPException, Query, status
+from fastapi import APIRouter, Depends, HTTPException, Query, Request, Response, status
 from sqlalchemy.orm import Session
 
+from govoplan_core.audit.logging import audit_event
 from govoplan_core.auth import ApiPrincipal, get_api_principal, has_scope
 from govoplan_core.core.calendar import CALENDAR_AVAILABILITY_READ_SCOPE, CALENDAR_EVENT_WRITE_SCOPE
+from govoplan_core.core.people import search_visible_people
 from govoplan_core.db.session import get_session
 from govoplan_scheduling.backend.manifest import ADMIN_SCOPE, READ_SCOPE, RESPOND_SCOPE, WRITE_SCOPE
 from govoplan_scheduling.backend.schemas import (
-    SchedulingAddressLookupCandidate,
-    SchedulingAddressLookupResponse,
     SchedulingAvailabilityResponse,
     SchedulingAvailabilityResponseRequest,
     SchedulingCalendarActionResponse,
     SchedulingCandidateSlotUpdateRequest,
     SchedulingDecisionRequest,
+    SchedulingInvitationActionRequest,
+    SchedulingInvitationActionResponse,
+    SchedulingInvitationRevokeRequest,
     SchedulingNotificationCreateRequest,
     SchedulingNotificationListResponse,
     SchedulingNotificationResponse,
+    SchedulingPeopleSearchCandidate,
+    SchedulingPeopleSearchGroup,
+    SchedulingPeopleSearchResponse,
     SchedulingRequestCreateRequest,
     SchedulingRequestListResponse,
     SchedulingRequestResponse,
     SchedulingRequestUpdateRequest,
     SchedulingPollSummaryResponse,
+    SchedulingPublicParticipationAccessRequest,
+    SchedulingPublicParticipationResponse,
+    SchedulingPublicParticipationSubmitRequest,
     SchedulingStatusResponse,
     SchedulingSummaryResponse,
 )
@@ -34,6 +42,7 @@ from govoplan_scheduling.backend.service import (
     SchedulingConflictError,
     SchedulingError,
     SchedulingPermissionError,
+    SchedulingPublicParticipationError,
     cancel_scheduling_request,
     close_scheduling_request,
     create_final_calendar_event,
@@ -42,56 +51,27 @@ from govoplan_scheduling.backend.service import (
     create_tentative_calendar_holds,
     decide_scheduling_request,
     evaluate_calendar_freebusy,
+    get_scheduling_request,
     get_scheduling_availability_response,
+    get_public_scheduling_participation,
     get_visible_scheduling_request,
     list_visible_scheduling_notifications,
     list_visible_scheduling_requests,
+    issue_scheduling_participant_invitation,
     open_scheduling_request,
-    refresh_participant_response_state,
     require_visible_scheduling_results,
+    revoke_scheduling_participant_invitation,
     scheduling_notification_response,
     scheduling_request_response,
     scheduling_request_summary,
     submit_scheduling_availability,
+    submit_public_scheduling_participation,
     update_scheduling_candidate_slot,
-    update_scheduling_request,
+    update_scheduling_request_with_change_log,
 )
 
 
 router = APIRouter(prefix="/scheduling", tags=["scheduling"])
-CAPABILITY_ADDRESSES_LOOKUP = "addresses.lookup"
-
-
-def _capability_payload(value: object) -> dict[str, Any]:
-    if dataclasses.is_dataclass(value):
-        return dataclasses.asdict(value)
-    if isinstance(value, dict):
-        return dict(value)
-    payload: dict[str, Any] = {}
-    for key in (
-        "contact_id",
-        "address_book_id",
-        "display_name",
-        "email",
-        "email_label",
-        "organization",
-        "role_title",
-        "tags",
-        "source_kind",
-        "source_ref",
-        "source_revision",
-        "provenance",
-    ):
-        if hasattr(value, key):
-            payload[key] = getattr(value, key)
-    return payload
-
-
-def _registry_capability(name: str) -> object | None:
-    registry = get_registry()
-    if registry is None or not hasattr(registry, "has_capability") or not registry.has_capability(name):
-        return None
-    return registry.capability(name)
 
 
 def _require_scope(principal: ApiPrincipal, scope: str) -> None:
@@ -112,7 +92,40 @@ def _principal_actor_ids(principal: ApiPrincipal) -> tuple[str, ...]:
 
 
 def _can_manage_scheduling(principal: ApiPrincipal) -> bool:
-    return has_scope(principal, WRITE_SCOPE) or has_scope(principal, ADMIN_SCOPE)
+    return has_scope(principal, ADMIN_SCOPE)
+
+
+def _require_scheduling_writer(principal: ApiPrincipal) -> None:
+    if has_scope(principal, WRITE_SCOPE) or has_scope(principal, ADMIN_SCOPE):
+        return
+    raise HTTPException(
+        status_code=status.HTTP_403_FORBIDDEN,
+        detail=f"Missing scope: {WRITE_SCOPE} or {ADMIN_SCOPE}",
+    )
+
+
+def _require_request_editor(
+    session: Session,
+    *,
+    principal: ApiPrincipal,
+    request_id: str,
+) -> None:
+    _require_scheduling_writer(principal)
+    if has_scope(principal, ADMIN_SCOPE):
+        return
+    try:
+        request = get_scheduling_request(
+            session,
+            tenant_id=principal.tenant_id,
+            request_id=request_id,
+        )
+    except SchedulingError as exc:
+        raise _scheduling_http_error(exc) from exc
+    if request.organizer_user_id not in _principal_actor_ids(principal):
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail="Only the organizer or a scheduling administrator can edit this request",
+        )
 
 
 def _scheduling_http_error(exc: SchedulingError) -> HTTPException:
@@ -127,16 +140,60 @@ def _scheduling_http_error(exc: SchedulingError) -> HTTPException:
     return HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(exc))
 
 
+def _public_participation_http_error(
+    exc: SchedulingPublicParticipationError,
+) -> HTTPException:
+    if exc.retry_after_seconds:
+        return HTTPException(
+            status_code=status.HTTP_429_TOO_MANY_REQUESTS,
+            detail=str(exc),
+            headers={"Retry-After": str(exc.retry_after_seconds)},
+        )
+    return HTTPException(
+        status_code=status.HTTP_404_NOT_FOUND,
+        detail=str(exc),
+    )
+
+
+def _client_address(request: Request) -> str | None:
+    return request.client.host if request.client is not None else None
+
+
+def _set_sensitive_response_headers(response: Response) -> None:
+    response.headers["Cache-Control"] = "no-store, private"
+    response.headers["Pragma"] = "no-cache"
+    response.headers["Referrer-Policy"] = "no-referrer"
+
+
+def _audit_invitation_action(
+    session: Session,
+    *,
+    principal: ApiPrincipal,
+    request_id: str,
+    participant_id: str,
+    action: str,
+    details: dict[str, Any],
+) -> None:
+    audit_event(
+        session,
+        tenant_id=principal.tenant_id,
+        user_id=(getattr(principal.user, "id", None) or principal.account_id),
+        api_key_id=principal.api_key_id,
+        action=action,
+        object_type="scheduling_request",
+        object_id=request_id,
+        details={"participant_id": participant_id, **details},
+    )
+
+
 def _request_response(
     request,
     *,
     principal: ApiPrincipal,
-    invitation_tokens: dict[str, str] | None = None,
 ) -> SchedulingRequestResponse:
     return SchedulingRequestResponse.model_validate(
         scheduling_request_response(
             request,
-            invitation_tokens=invitation_tokens,
             actor_ids=_principal_actor_ids(principal),
             actor_user_id=principal.account_id,
             can_manage=_can_manage_scheduling(principal),
@@ -144,27 +201,102 @@ def _request_response(
     )
 
 
-@router.get("/address-lookup", response_model=SchedulingAddressLookupResponse)
-def api_lookup_scheduling_addresses(
+@router.post(
+    "/public/{request_id}/{token}",
+    response_model=SchedulingPublicParticipationResponse,
+)
+def api_get_public_scheduling_participation(
+    request_id: str,
+    token: str,
+    payload: SchedulingPublicParticipationAccessRequest,
+    request: Request,
+    session: Session = Depends(get_session),
+) -> SchedulingPublicParticipationResponse:
+    try:
+        response = get_public_scheduling_participation(
+            session,
+            request_id=request_id,
+            token=token,
+            payload=payload,
+            client_address=_client_address(request),
+        )
+    except SchedulingPublicParticipationError as exc:
+        raise _public_participation_http_error(exc) from exc
+    return SchedulingPublicParticipationResponse.model_validate(response)
+
+
+@router.post(
+    "/public/{request_id}/{token}/responses",
+    response_model=SchedulingPublicParticipationResponse,
+)
+def api_submit_public_scheduling_participation(
+    request_id: str,
+    token: str,
+    payload: SchedulingPublicParticipationSubmitRequest,
+    request: Request,
+    session: Session = Depends(get_session),
+) -> SchedulingPublicParticipationResponse:
+    try:
+        response = submit_public_scheduling_participation(
+            session,
+            request_id=request_id,
+            token=token,
+            payload=payload,
+            client_address=_client_address(request),
+        )
+    except SchedulingPublicParticipationError as exc:
+        raise _public_participation_http_error(exc) from exc
+    except SchedulingError as exc:
+        raise _scheduling_http_error(exc) from exc
+    validated = SchedulingPublicParticipationResponse.model_validate(response)
+    session.commit()
+    return validated
+
+
+@router.get("/people", response_model=SchedulingPeopleSearchResponse)
+def api_search_scheduling_people(
     query: str = Query(min_length=1),
     limit: int = Query(default=25, ge=1, le=100),
     session: Session = Depends(get_session),
     principal: ApiPrincipal = Depends(get_api_principal),
-) -> SchedulingAddressLookupResponse:
-    _require_scope(principal, WRITE_SCOPE)
-    capability = _registry_capability(CAPABILITY_ADDRESSES_LOOKUP)
-    if capability is None or not hasattr(capability, "lookup"):
-        return SchedulingAddressLookupResponse(available=False, candidates=[])
-    candidates = getattr(capability, "lookup")(session, principal, query=query, limit=limit)
-    return SchedulingAddressLookupResponse(
-        available=True,
-        candidates=[SchedulingAddressLookupCandidate.model_validate(_capability_payload(candidate)) for candidate in candidates],
+) -> SchedulingPeopleSearchResponse:
+    _require_scheduling_writer(principal)
+    groups = search_visible_people(
+        get_registry(),
+        session,
+        principal,
+        query=query,
+        limit=limit,
+    )
+    return SchedulingPeopleSearchResponse(
+        groups=[
+            SchedulingPeopleSearchGroup(
+                key=group.key,
+                label=group.label,
+                candidates=[
+                    SchedulingPeopleSearchCandidate(
+                        selection_key=candidate.selection_key,
+                        kind=candidate.kind,
+                        reference_id=candidate.reference_id,
+                        display_name=candidate.display_name,
+                        email=candidate.email,
+                        source_module=candidate.source_module,
+                        source_label=candidate.source_label,
+                        source_revision=candidate.source_revision,
+                        description=candidate.description,
+                    )
+                    for candidate in group.candidates
+                ],
+            )
+            for group in groups
+        ]
     )
 
 
 @router.get("/requests", response_model=SchedulingRequestListResponse)
 def api_list_scheduling_requests(
     status_filter: str | None = Query(default=None, alias="status"),
+    limit: int = 100,
     session: Session = Depends(get_session),
     principal: ApiPrincipal = Depends(get_api_principal),
 ) -> SchedulingRequestListResponse:
@@ -175,21 +307,11 @@ def api_list_scheduling_requests(
         actor_ids=_principal_actor_ids(principal),
         can_manage=_can_manage_scheduling(principal),
         status=status_filter,
+        limit=limit,
     )
-    actor_ids = _principal_actor_ids(principal)
-    for request in requests:
-        refresh_participant_response_state(
-            session,
-            request=request,
-            actor_ids=actor_ids,
-        )
-    response = SchedulingRequestListResponse(
+    return SchedulingRequestListResponse(
         requests=[_request_response(request, principal=principal) for request in requests]
     )
-    # Poll responses are authoritative, while Scheduling keeps a durable
-    # participant projection used by its task-oriented list.
-    session.commit()
-    return response
 
 
 @router.post("/requests", response_model=SchedulingRequestResponse, status_code=status.HTTP_201_CREATED)
@@ -198,9 +320,9 @@ def api_create_scheduling_request(
     session: Session = Depends(get_session),
     principal: ApiPrincipal = Depends(get_api_principal),
 ) -> SchedulingRequestResponse:
-    _require_scope(principal, WRITE_SCOPE)
+    _require_scheduling_writer(principal)
     try:
-        request, invitation_tokens = create_scheduling_request(
+        request, _invitation_tokens = create_scheduling_request(
             session,
             tenant_id=principal.tenant_id,
             user_id=principal.account_id,
@@ -208,7 +330,7 @@ def api_create_scheduling_request(
         )
     except SchedulingError as exc:
         raise _scheduling_http_error(exc) from exc
-    response = _request_response(request, principal=principal, invitation_tokens=invitation_tokens)
+    response = _request_response(request, principal=principal)
     session.commit()
     return response
 
@@ -275,16 +397,9 @@ def api_get_scheduling_request(
             actor_ids=_principal_actor_ids(principal),
             can_manage=_can_manage_scheduling(principal),
         )
-        refresh_participant_response_state(
-            session,
-            request=request,
-            actor_ids=_principal_actor_ids(principal),
-        )
     except SchedulingError as exc:
         raise _scheduling_http_error(exc) from exc
-    response = _request_response(request, principal=principal)
-    session.commit()
-    return response
+    return _request_response(request, principal=principal)
 
 
 @router.patch("/requests/{request_id}", response_model=SchedulingRequestResponse)
@@ -294,9 +409,13 @@ def api_update_scheduling_request(
     session: Session = Depends(get_session),
     principal: ApiPrincipal = Depends(get_api_principal),
 ) -> SchedulingRequestResponse:
-    _require_scope(principal, WRITE_SCOPE)
+    _require_request_editor(
+        session,
+        principal=principal,
+        request_id=request_id,
+    )
     try:
-        request = update_scheduling_request(
+        request, participant_mutations = update_scheduling_request_with_change_log(
             session,
             tenant_id=principal.tenant_id,
             request_id=request_id,
@@ -304,11 +423,153 @@ def api_update_scheduling_request(
         )
     except SchedulingError as exc:
         raise _scheduling_http_error(exc) from exc
+    for mutation in participant_mutations:
+        _audit_invitation_action(
+            session,
+            principal=principal,
+            request_id=request_id,
+            participant_id=mutation.participant_id,
+            action=mutation.action,
+            details={
+                "replacement_participant_id": mutation.replacement_participant_id,
+                "changed_fields": list(mutation.changed_fields),
+                "invitation_revoked": mutation.invitation_revoked,
+                "retired_response_count": mutation.retired_response_count,
+                "notification_id": mutation.notification_id,
+            },
+        )
     response = _request_response(request, principal=principal)
     session.commit()
     return response
 
 
+@router.post(
+    "/requests/{request_id}/participants/{participant_id}/invitation",
+    response_model=SchedulingInvitationActionResponse,
+)
+def api_issue_scheduling_participant_invitation(
+    request_id: str,
+    participant_id: str,
+    payload: SchedulingInvitationActionRequest,
+    response: Response,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> SchedulingInvitationActionResponse:
+    _require_request_editor(
+        session,
+        principal=principal,
+        request_id=request_id,
+    )
+    try:
+        result = issue_scheduling_participant_invitation(
+            session,
+            tenant_id=principal.tenant_id,
+            request_id=request_id,
+            participant_id=participant_id,
+            participant_revision=payload.participant_revision,
+            action=payload.action,
+        )
+    except SchedulingError as exc:
+        raise _scheduling_http_error(exc) from exc
+    audit_details = {
+        "request_status": result.request.status,
+        "delivery_action": payload.action,
+        "replaced_existing": result.replaced_existing,
+    }
+    _audit_invitation_action(
+        session,
+        principal=principal,
+        request_id=request_id,
+        participant_id=participant_id,
+        action="scheduling.invitation_issued",
+        details=audit_details,
+    )
+    _audit_invitation_action(
+        session,
+        principal=principal,
+        request_id=request_id,
+        participant_id=participant_id,
+        action=(
+            "scheduling.invitation_copied"
+            if payload.action == "copy"
+            else "scheduling.invitation_send_requested"
+        ),
+        details={
+            **audit_details,
+            "notification_id": (
+                result.notification.id if result.notification is not None else None
+            ),
+            "notification_status": result.status,
+        },
+    )
+    validated = SchedulingInvitationActionResponse(
+        participant_id=result.participant.id,
+        action=payload.action,
+        status=result.status,
+        action_url=result.action_url,
+        issued_at=result.participant.last_invited_at,
+        notification=(
+            SchedulingNotificationResponse.model_validate(
+                scheduling_notification_response(result.notification)
+            )
+            if result.notification is not None
+            else None
+        ),
+    )
+    _set_sensitive_response_headers(response)
+    session.commit()
+    return validated
+
+
+@router.delete(
+    "/requests/{request_id}/participants/{participant_id}/invitation",
+    response_model=SchedulingInvitationActionResponse,
+)
+def api_revoke_scheduling_participant_invitation(
+    request_id: str,
+    participant_id: str,
+    payload: SchedulingInvitationRevokeRequest,
+    response: Response,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> SchedulingInvitationActionResponse:
+    _require_request_editor(
+        session,
+        principal=principal,
+        request_id=request_id,
+    )
+    try:
+        result = revoke_scheduling_participant_invitation(
+            session,
+            tenant_id=principal.tenant_id,
+            request_id=request_id,
+            participant_id=participant_id,
+            participant_revision=payload.participant_revision,
+        )
+    except SchedulingError as exc:
+        raise _scheduling_http_error(exc) from exc
+    _audit_invitation_action(
+        session,
+        principal=principal,
+        request_id=request_id,
+        participant_id=participant_id,
+        action="scheduling.invitation_revoked",
+        details={
+            "request_status": result.request.status,
+            "replayed": result.replayed,
+        },
+    )
+    validated = SchedulingInvitationActionResponse(
+        participant_id=result.participant.id,
+        action="revoke",
+        status=result.status,
+        replayed=result.replayed,
+    )
+    _set_sensitive_response_headers(response)
+    session.commit()
+    return validated
+
+
 @router.patch("/requests/{request_id}/slots/{slot_id}", response_model=SchedulingRequestResponse)
 def api_update_scheduling_candidate_slot(
     request_id: str,
@@ -317,7 +578,11 @@ def api_update_scheduling_candidate_slot(
     session: Session = Depends(get_session),
     principal: ApiPrincipal = Depends(get_api_principal),
 ) -> SchedulingRequestResponse:
-    _require_scope(principal, WRITE_SCOPE)
+    _require_request_editor(
+        session,
+        principal=principal,
+        request_id=request_id,
+    )
     try:
         request = update_scheduling_candidate_slot(
             session,
@@ -339,7 +604,7 @@ def api_open_scheduling_request(
     session: Session = Depends(get_session),
     principal: ApiPrincipal = Depends(get_api_principal),
 ) -> SchedulingStatusResponse:
-    _require_scope(principal, WRITE_SCOPE)
+    _require_request_editor(session, principal=principal, request_id=request_id)
     try:
         request = open_scheduling_request(session, tenant_id=principal.tenant_id, request_id=request_id)
     except SchedulingError as exc:
@@ -355,7 +620,7 @@ def api_close_scheduling_request(
     session: Session = Depends(get_session),
     principal: ApiPrincipal = Depends(get_api_principal),
 ) -> SchedulingStatusResponse:
-    _require_scope(principal, WRITE_SCOPE)
+    _require_request_editor(session, principal=principal, request_id=request_id)
     try:
         request = close_scheduling_request(session, tenant_id=principal.tenant_id, request_id=request_id)
     except SchedulingError as exc:
@@ -372,7 +637,7 @@ def api_decide_scheduling_request(
     session: Session = Depends(get_session),
     principal: ApiPrincipal = Depends(get_api_principal),
 ) -> SchedulingStatusResponse:
-    _require_scope(principal, WRITE_SCOPE)
+    _require_request_editor(session, principal=principal, request_id=request_id)
     try:
         request = decide_scheduling_request(
             session,
@@ -398,7 +663,7 @@ def api_evaluate_calendar_freebusy(
     session: Session = Depends(get_session),
     principal: ApiPrincipal = Depends(get_api_principal),
 ) -> SchedulingCalendarActionResponse:
-    _require_scope(principal, WRITE_SCOPE)
+    _require_request_editor(session, principal=principal, request_id=request_id)
     _require_scope(principal, CALENDAR_AVAILABILITY_READ_SCOPE)
     try:
         request, warnings = evaluate_calendar_freebusy(session, tenant_id=principal.tenant_id, request_id=request_id)
@@ -419,7 +684,7 @@ def api_create_tentative_calendar_holds(
     session: Session = Depends(get_session),
     principal: ApiPrincipal = Depends(get_api_principal),
 ) -> SchedulingCalendarActionResponse:
-    _require_scope(principal, WRITE_SCOPE)
+    _require_request_editor(session, principal=principal, request_id=request_id)
     _require_scope(principal, CALENDAR_EVENT_WRITE_SCOPE)
     try:
         request, created_event_ids, warnings = create_tentative_calendar_holds(
@@ -446,7 +711,7 @@ def api_create_final_calendar_event(
     session: Session = Depends(get_session),
     principal: ApiPrincipal = Depends(get_api_principal),
 ) -> SchedulingCalendarActionResponse:
-    _require_scope(principal, WRITE_SCOPE)
+    _require_request_editor(session, principal=principal, request_id=request_id)
     _require_scope(principal, CALENDAR_EVENT_WRITE_SCOPE)
     try:
         request, event_id, warnings = create_final_calendar_event(
@@ -472,7 +737,7 @@ def api_cancel_scheduling_request(
     session: Session = Depends(get_session),
     principal: ApiPrincipal = Depends(get_api_principal),
 ) -> SchedulingStatusResponse:
-    _require_scope(principal, WRITE_SCOPE)
+    _require_request_editor(session, principal=principal, request_id=request_id)
     try:
         request = cancel_scheduling_request(session, tenant_id=principal.tenant_id, request_id=request_id)
     except SchedulingError as exc:
@@ -547,7 +812,7 @@ def api_create_scheduling_notifications(
     session: Session = Depends(get_session),
     principal: ApiPrincipal = Depends(get_api_principal),
 ) -> SchedulingNotificationListResponse:
-    _require_scope(principal, WRITE_SCOPE)
+    _require_request_editor(session, principal=principal, request_id=request_id)
     try:
         notifications = create_scheduling_notification_jobs(
             session,

src/govoplan_scheduling/backend/schemas.py

@@ -4,7 +4,7 @@ from datetime import datetime
 from typing import Any, Literal
 from zoneinfo import ZoneInfo, ZoneInfoNotFoundError
 
-from pydantic import AwareDatetime, BaseModel, ConfigDict, Field, field_validator, model_validator
+from pydantic import AwareDatetime, BaseModel, ConfigDict, Field, SecretStr, field_validator, model_validator
 
 
 SchedulingStatus = Literal["draft", "collecting", "closed", "decided", "handed_off", "cancelled", "archived"]
@@ -25,6 +25,24 @@ def _known_timezone(value: str | None) -> str | None:
     return value
 
 
+def _participant_email(value: str | None) -> str | None:
+    if value is None:
+        return None
+    normalized = value.strip().casefold()
+    if not normalized:
+        return None
+    local, separator, domain = normalized.partition("@")
+    if (
+        separator != "@"
+        or not local
+        or not domain
+        or "@" in domain
+        or any(character.isspace() for character in normalized)
+    ):
+        raise ValueError("participant_email must be a valid email address")
+    return normalized
+
+
 class SchedulingCalendarPreferences(BaseModel):
     model_config = ConfigDict(extra="forbid")
 
@@ -91,6 +109,44 @@ class SchedulingParticipantInput(BaseModel):
     required: bool = True
     metadata: dict[str, Any] = Field(default_factory=dict)
 
+    _validate_email = field_validator("email")(_participant_email)
+
+
+class SchedulingCandidateSlotReconcileInput(SchedulingCandidateSlotInput):
+    id: str | None = Field(default=None, max_length=36)
+    revision: str | None = Field(
+        default=None,
+        min_length=64,
+        max_length=64,
+        pattern=r"^[0-9a-f]{64}$",
+    )
+
+    @model_validator(mode="after")
+    def validate_existing_revision(self) -> "SchedulingCandidateSlotReconcileInput":
+        if self.id is not None and self.revision is None:
+            raise ValueError("revision is required for an existing scheduling slot")
+        if self.id is None and self.revision is not None:
+            raise ValueError("revision can only be supplied for an existing scheduling slot")
+        return self
+
+
+class SchedulingParticipantReconcileInput(SchedulingParticipantInput):
+    id: str | None = Field(default=None, max_length=36)
+    revision: str | None = Field(
+        default=None,
+        min_length=64,
+        max_length=64,
+        pattern=r"^[0-9a-f]{64}$",
+    )
+
+    @model_validator(mode="after")
+    def validate_existing_revision(self) -> "SchedulingParticipantReconcileInput":
+        if self.id is not None and self.revision is None:
+            raise ValueError("revision is required for an existing scheduling participant")
+        if self.id is None and self.revision is not None:
+            raise ValueError("revision can only be supplied for an existing scheduling participant")
+        return self
+
 
 class SchedulingRequestCreateRequest(BaseModel):
     model_config = ConfigDict(extra="forbid")
@@ -105,14 +161,37 @@ class SchedulingRequestCreateRequest(BaseModel):
     allow_participant_updates: bool = True
     result_visibility: SchedulingResultVisibility = "after_close"
     participant_visibility: SchedulingParticipantVisibility = "aggregates_only"
+    notify_on_answers: bool = True
+    single_choice: bool = False
+    max_participants_per_option: int | None = Field(default=None, ge=1)
+    allow_maybe: bool = True
+    allow_comments: bool = False
+    participant_email_required: bool = False
+    anonymous_password_protection_enabled: bool = False
+    anonymous_password: SecretStr | None = Field(default=None, min_length=8, max_length=1024)
     calendar: SchedulingCalendarPreferences = Field(default_factory=SchedulingCalendarPreferences)
     slots: list[SchedulingCandidateSlotInput] = Field(default_factory=list, min_length=1)
     participants: list[SchedulingParticipantInput] = Field(default_factory=list)
-    create_participant_invitations: bool = True
+    create_participant_invitations: bool = Field(
+        default=False,
+        deprecated=True,
+        description=(
+            "Compatibility field; participant links are issued only through "
+            "the explicit participant invitation action."
+        ),
+    )
     metadata: dict[str, Any] = Field(default_factory=dict)
 
     _validate_timezone = field_validator("timezone")(_known_timezone)
 
+    @model_validator(mode="after")
+    def validate_anonymous_password(self) -> "SchedulingRequestCreateRequest":
+        if self.anonymous_password_protection_enabled and self.anonymous_password is None:
+            raise ValueError("anonymous_password is required when password protection is enabled")
+        if not self.anonymous_password_protection_enabled and self.anonymous_password is not None:
+            raise ValueError("anonymous_password requires password protection to be enabled")
+        return self
+
 
 class SchedulingRequestUpdateRequest(BaseModel):
     model_config = ConfigDict(extra="forbid")
@@ -125,9 +204,47 @@ class SchedulingRequestUpdateRequest(BaseModel):
     allow_participant_updates: bool | None = None
     result_visibility: SchedulingResultVisibility | None = None
     participant_visibility: SchedulingParticipantVisibility | None = None
+    notify_on_answers: bool | None = None
+    single_choice: bool | None = None
+    max_participants_per_option: int | None = Field(default=None, ge=1)
+    allow_maybe: bool | None = None
+    allow_comments: bool | None = None
+    participant_email_required: bool | None = None
+    anonymous_password_protection_enabled: bool | None = None
+    anonymous_password: SecretStr | None = Field(default=None, min_length=8, max_length=1024)
     calendar: SchedulingCalendarPreferences | None = None
+    slots: list[SchedulingCandidateSlotReconcileInput] | None = Field(
+        default=None,
+        min_length=1,
+    )
+    participants: list[SchedulingParticipantReconcileInput] | None = None
+    create_participant_invitations: bool = Field(
+        default=False,
+        deprecated=True,
+        description=(
+            "Compatibility field; participant links are issued only through "
+            "the explicit participant invitation action."
+        ),
+    )
     metadata: dict[str, Any] | None = None
 
+    @model_validator(mode="after")
+    def validate_anonymous_password(self) -> "SchedulingRequestUpdateRequest":
+        if self.anonymous_password_protection_enabled is False and self.anonymous_password is not None:
+            raise ValueError("anonymous_password cannot be set while password protection is disabled")
+        return self
+
+    @model_validator(mode="after")
+    def validate_reconciliation_ids(self) -> "SchedulingRequestUpdateRequest":
+        for field_name in ("slots", "participants"):
+            values = getattr(self, field_name)
+            if values is None:
+                continue
+            ids = [value.id for value in values if value.id is not None]
+            if len(ids) != len(set(ids)):
+                raise ValueError(f"Duplicate ids are not allowed in {field_name}")
+        return self
+
 
 class SchedulingCandidateSlotResponse(BaseModel):
     id: str
@@ -149,11 +266,13 @@ class SchedulingCandidateSlotResponse(BaseModel):
 
 class SchedulingParticipantResponse(BaseModel):
     id: str
+    revision: str | None = None
+    is_current_participant: bool = False
     respondent_id: str | None = None
     display_name: str | None = None
     email: str | None = None
-    participant_type: str
-    required: bool
+    participant_type: str | None = None
+    required: bool | None = None
     status: str
     poll_invitation_id: str | None = None
     invitation_token: str | None = None
@@ -178,7 +297,7 @@ class SchedulingParticipantVisibilityDecisionResponse(BaseModel):
 
 class SchedulingRequestResponse(BaseModel):
     id: str
-    tenant_id: str
+    tenant_id: str | None = None
     title: str
     description: str | None = None
     location: str | None = None
@@ -192,17 +311,28 @@ class SchedulingRequestResponse(BaseModel):
     allow_participant_updates: bool
     result_visibility: str
     participant_visibility: SchedulingParticipantVisibility
+    notify_on_answers: bool
+    single_choice: bool
+    max_participants_per_option: int | None = None
+    allow_maybe: bool
+    allow_comments: bool
+    participant_email_required: bool
+    anonymous_password_protection_enabled: bool
+    public_participation_policy_enforcement_available: bool | None = None
+    public_participation_policy_enforcement_reason: str | None = None
+    participant_invitation_delivery_available: bool | None = None
     effective_participant_visibility: SchedulingParticipantVisibility
     participant_aggregate: SchedulingParticipantAggregateResponse
     participant_visibility_decision: SchedulingParticipantVisibilityDecisionResponse
-    calendar_integration_enabled: bool
+    calendar_integration_enabled: bool | None = None
     calendar_id: str | None = None
-    calendar_freebusy_enabled: bool
-    calendar_hold_enabled: bool
-    create_calendar_event_on_decision: bool
+    calendar_freebusy_enabled: bool | None = None
+    calendar_hold_enabled: bool | None = None
+    create_calendar_event_on_decision: bool | None = None
     calendar_event_id: str | None = None
     handed_off_at: datetime | None = None
     cancelled_at: datetime | None = None
+    cancellation_notice_until: datetime | None = None
     created_at: datetime
     updated_at: datetime
     metadata: dict[str, Any] = Field(default_factory=dict)
@@ -238,6 +368,7 @@ class SchedulingAvailabilityResponseRequest(BaseModel):
     model_config = ConfigDict(extra="forbid")
 
     answers: list[SchedulingAvailabilityAnswerInput] = Field(min_length=1)
+    comment: str | None = Field(default=None, max_length=4000)
 
     @model_validator(mode="after")
     def validate_unique_slots(self) -> "SchedulingAvailabilityResponseRequest":
@@ -258,6 +389,73 @@ class SchedulingAvailabilityResponse(BaseModel):
     has_response: bool = False
     submitted_at: datetime | None = None
     answers: list[SchedulingAvailabilityAnswerResponse] = Field(default_factory=list)
+    comment: str | None = None
+
+
+class SchedulingPublicParticipationAccessRequest(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    participant_email: str | None = Field(default=None, max_length=320)
+    password: SecretStr | None = Field(default=None, max_length=1024)
+
+    _validate_participant_email = field_validator("participant_email")(_participant_email)
+
+
+class SchedulingPublicParticipationSubmitRequest(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    answers: list[SchedulingAvailabilityAnswerInput] = Field(min_length=1)
+    participant_email: str | None = Field(default=None, max_length=320)
+    password: SecretStr | None = Field(default=None, max_length=1024)
+    comment: str | None = Field(default=None, max_length=4000)
+    idempotency_key: str | None = Field(default=None, min_length=1, max_length=255)
+
+    _validate_participant_email = field_validator("participant_email")(_participant_email)
+
+    @model_validator(mode="after")
+    def validate_unique_slots(self) -> "SchedulingPublicParticipationSubmitRequest":
+        slot_ids = [answer.slot_id for answer in self.answers]
+        if len(slot_ids) != len(set(slot_ids)):
+            raise ValueError("Each scheduling slot can be answered only once")
+        return self
+
+
+class SchedulingPublicCandidateSlotResponse(BaseModel):
+    id: str
+    label: str
+    description: str | None = None
+    start_at: datetime
+    end_at: datetime
+    timezone: str
+    location: str | None = None
+    position: int
+    revision: str
+
+
+class SchedulingPublicParticipationResponse(BaseModel):
+    request_id: str
+    title: str
+    description: str | None = None
+    location: str | None = None
+    timezone: str
+    status: str
+    deadline_at: datetime | None = None
+    cancelled_at: datetime | None = None
+    cancellation_notice_until: datetime | None = None
+    cancellation_notice_only: bool = False
+    participant_email_required: bool
+    anonymous_password_required: bool
+    single_choice: bool
+    max_participants_per_option: int | None = None
+    allow_maybe: bool
+    allow_comments: bool
+    allow_participant_updates: bool
+    has_response: bool = False
+    submitted_at: datetime | None = None
+    answers: list[SchedulingAvailabilityAnswerResponse] = Field(default_factory=list)
+    comment: str | None = None
+    replayed: bool = False
+    slots: list[SchedulingPublicCandidateSlotResponse] = Field(default_factory=list)
 
 
 class SchedulingPollOptionResultResponse(BaseModel):
@@ -319,21 +517,68 @@ class SchedulingNotificationCreateRequest(BaseModel):
     metadata: dict[str, Any] = Field(default_factory=dict)
 
 
-class SchedulingAddressLookupCandidate(BaseModel):
-    contact_id: str
-    address_book_id: str
+class SchedulingInvitationActionRequest(BaseModel):
+    """Explicitly issue one fresh participant-specific participation link."""
+
+    model_config = ConfigDict(extra="forbid")
+
+    action: Literal["copy", "send"]
+    participant_revision: str = Field(
+        min_length=64,
+        max_length=64,
+        pattern=r"^[0-9a-f]{64}$",
+        description=(
+            "Semantic revision from the participant management projection; "
+            "stale actions are rejected before rotating or delivering a link."
+        ),
+    )
+
+
+class SchedulingInvitationRevokeRequest(BaseModel):
+    """Revoke the link represented by one current participant projection."""
+
+    model_config = ConfigDict(extra="forbid")
+
+    participant_revision: str = Field(
+        min_length=64,
+        max_length=64,
+        pattern=r"^[0-9a-f]{64}$",
+        description=(
+            "Semantic revision from the participant management projection; "
+            "stale revocations are rejected before changing access."
+        ),
+    )
+
+
+class SchedulingInvitationActionResponse(BaseModel):
+    participant_id: str
+    action: Literal["copy", "send", "revoke"]
+    status: str
+    action_url: str | None = None
+    issued_at: datetime | None = None
+    replayed: bool = False
+    notification: SchedulingNotificationResponse | None = None
+
+
+class SchedulingPeopleSearchCandidate(BaseModel):
+    """Opaque, task-safe projection of a visible directory candidate."""
+
+    selection_key: str
+    kind: str
+    reference_id: str
     display_name: str
     email: str | None = None
-    email_label: str | None = None
-    organization: str | None = None
-    role_title: str | None = None
-    tags: list[str] = Field(default_factory=list)
-    source_kind: str = "local"
-    source_ref: str | None = None
+    source_module: str | None = None
+    source_label: str | None = None
     source_revision: str | None = None
-    provenance: dict[str, Any] = Field(default_factory=dict)
+    description: str | None = None
 
 
-class SchedulingAddressLookupResponse(BaseModel):
-    available: bool = False
-    candidates: list[SchedulingAddressLookupCandidate] = Field(default_factory=list)
+class SchedulingPeopleSearchGroup(BaseModel):
+    key: str
+    label: str
+    candidates: list[SchedulingPeopleSearchCandidate] = Field(default_factory=list)
+
+
+class SchedulingPeopleSearchResponse(BaseModel):
+    groups: list[SchedulingPeopleSearchGroup] = Field(default_factory=list)

src/govoplan_scheduling/backend/security.py

@@ -0,0 +1,61 @@
+from __future__ import annotations
+
+import base64
+import hashlib
+import hmac
+import os
+
+
+_ALGORITHM = "pbkdf2_sha256"
+_DEFAULT_ITERATIONS = 260_000
+_SALT_BYTES = 16
+
+
+def hash_participant_password(
+    password: str,
+    *,
+    iterations: int = _DEFAULT_ITERATIONS,
+) -> str:
+    """Hash a public-participant access password for durable storage."""
+
+    salt = os.urandom(_SALT_BYTES)
+    digest = hashlib.pbkdf2_hmac(
+        "sha256",
+        password.encode("utf-8"),
+        salt,
+        iterations,
+    )
+    return "$".join(
+        (
+            _ALGORITHM,
+            str(iterations),
+            base64.b64encode(salt).decode("ascii"),
+            base64.b64encode(digest).decode("ascii"),
+        )
+    )
+
+
+def verify_participant_password(password: str, encoded: str | None) -> bool:
+    """Verify a participant password without exposing the stored hash."""
+
+    if not encoded:
+        return False
+    try:
+        algorithm, iterations_text, salt_b64, digest_b64 = encoded.split("$", 3)
+        if algorithm != _ALGORITHM:
+            return False
+        iterations = int(iterations_text)
+        salt = base64.b64decode(salt_b64.encode("ascii"), validate=True)
+        expected = base64.b64decode(digest_b64.encode("ascii"), validate=True)
+    except (TypeError, ValueError):
+        return False
+    actual = hashlib.pbkdf2_hmac(
+        "sha256",
+        password.encode("utf-8"),
+        salt,
+        iterations,
+    )
+    return hmac.compare_digest(actual, expected)
+
+
+__all__ = ["hash_participant_password", "verify_participant_password"]

tests/test_manifest.py

@@ -17,26 +17,40 @@ class SchedulingManifestTests(unittest.TestCase):
         self.assertIn("access", manifest.optional_dependencies)
         self.assertIn("addresses", manifest.optional_dependencies)
         self.assertIn("policy", manifest.optional_dependencies)
-        self.assertEqual(("poll.scheduling",), manifest.required_capabilities)
+        self.assertEqual(
+            ("poll.scheduling", "poll.participation_gateway"),
+            manifest.required_capabilities,
+        )
         self.assertIn("auth.principalResolver", manifest.optional_capabilities)
         self.assertIn("poll.scheduling", manifest.required_capabilities)
         self.assertIn("calendar.scheduling", manifest.optional_capabilities)
         self.assertIn("policy.schedulingParticipantPrivacy", manifest.optional_capabilities)
+        self.assertIn("access.people_search", manifest.optional_capabilities)
+        self.assertIn("addresses.people_search", manifest.optional_capabilities)
         self.assertIn("evaluation", manifest.optional_dependencies)
         self.assertIsNotNone(manifest.route_factory)
         self.assertIsNotNone(manifest.migration_spec)
         self.assertIsNotNone(manifest.frontend)
+        self.assertEqual(
+            ["/scheduling/public/:requestId/:token"],
+            [route.path for route in manifest.frontend.public_routes],
+        )
         self.assertIn("poll.availability_matrix", {interface.name for interface in manifest.requires_interfaces})
         self.assertIn("poll.response_collection", {interface.name for interface in manifest.requires_interfaces})
         self.assertIn("poll.workflow_context", {interface.name for interface in manifest.requires_interfaces})
-        self.assertIn("poll.signed_participation", {interface.name for interface in manifest.requires_interfaces})
+        self.assertIn("poll.governed_participation", {interface.name for interface in manifest.requires_interfaces})
         self.assertIn("notifications.dispatch", {interface.name for interface in manifest.requires_interfaces})
-        self.assertIn("addresses.lookup", {interface.name for interface in manifest.requires_interfaces})
+        self.assertIn("access.people_search", {interface.name for interface in manifest.requires_interfaces})
+        self.assertIn("addresses.people_search", {interface.name for interface in manifest.requires_interfaces})
         self.assertIn("calendar.scheduling", {interface.name for interface in manifest.requires_interfaces})
         required_interfaces = {interface.name: interface for interface in manifest.requires_interfaces}
-        self.assertEqual("0.1.9", required_interfaces["poll.availability_matrix"].version_min)
-        self.assertEqual("0.1.9", required_interfaces["poll.response_collection"].version_min)
-        self.assertEqual("0.1.9", required_interfaces["poll.workflow_context"].version_min)
+        for interface_name in (
+            "poll.availability_matrix",
+            "poll.response_collection",
+            "poll.workflow_context",
+            "poll.governed_participation",
+        ):
+            self.assertEqual("0.1.11", required_interfaces[interface_name].version_min)
 
 
 if __name__ == "__main__":

tests/test_migrations.py

@@ -20,7 +20,8 @@ from govoplan_scheduling.backend.db.models import (
 from govoplan_scheduling.backend.manifest import get_manifest as get_scheduling_manifest
 
 
-_SCHEDULING_HEAD = "9c2f4a7d1e6b"
+_SCHEDULING_HEAD = "c9d4e7f1a2b3"
+_SCHEDULING_RESPONSE_SETTINGS_REVISION = "ad7e3c9b2f10"
 _ENABLED_MODULES = ("poll", "scheduling")
 _MANIFEST_FACTORIES = (get_poll_manifest, get_scheduling_manifest)
 
@@ -110,12 +111,27 @@ class SchedulingMigrationTests(unittest.TestCase):
                             "scheduling_requests"
                         )
                     }
+                    participant_columns = {
+                        item["name"]
+                        for item in inspect(connection).get_columns(
+                            "scheduling_participants"
+                        )
+                    }
                     visibility = connection.execute(
                         text(
                             "SELECT participant_visibility FROM scheduling_requests "
                             "WHERE id = 'request-1'"
                         )
                     ).scalar_one()
+                    response_defaults = connection.execute(
+                        text(
+                            "SELECT notify_on_answers, single_choice, "
+                            "max_participants_per_option, allow_maybe, allow_comments, "
+                            "participant_email_required, anonymous_password_protection_enabled, "
+                            "anonymous_password_hash FROM scheduling_requests "
+                            "WHERE id = 'request-1'"
+                        )
+                    ).one()
                     counts = {
                         model.__tablename__: connection.execute(
                             select(func.count()).select_from(model)
@@ -130,7 +146,12 @@ class SchedulingMigrationTests(unittest.TestCase):
 
                 self.assertIn(_SCHEDULING_HEAD, heads)
                 self.assertIn("participant_visibility", columns)
+                self.assertIn("cancellation_notice_until", columns)
+                self.assertIn("max_participants_per_option", columns)
+                self.assertIn("response_comment", participant_columns)
+                self.assertIn("participation_gateway", participant_columns)
                 self.assertEqual(visibility, "aggregates_only")
+                self.assertEqual(tuple(response_defaults), (1, 0, None, 1, 0, 0, 0, None))
                 self.assertEqual(set(counts.values()), {1})
             finally:
                 engine.dispose()
@@ -219,6 +240,131 @@ class SchedulingMigrationTests(unittest.TestCase):
             finally:
                 engine.dispose()
 
+    def test_rejects_partial_existing_response_settings(self) -> None:
+        with tempfile.TemporaryDirectory(
+            prefix="govoplan-scheduling-migration-"
+        ) as directory:
+            url = f"sqlite:///{Path(directory) / 'scheduling.db'}"
+            self._migrate(url)
+            engine = create_engine(url)
+            try:
+                with engine.begin() as connection:
+                    self._remove_scheduling_revision(
+                        connection,
+                        remove_privacy_column=False,
+                    )
+                    connection.execute(
+                        text(
+                            "ALTER TABLE scheduling_requests "
+                            "DROP COLUMN allow_comments"
+                        )
+                    )
+
+                with self.assertRaisesRegex(
+                    RuntimeError,
+                    "partial scheduling_requests scheduling response settings",
+                ):
+                    self._migrate(url)
+
+                with engine.connect() as connection:
+                    heads = set(
+                        MigrationContext.configure(connection).get_current_heads()
+                    )
+                self.assertNotIn(_SCHEDULING_HEAD, heads)
+            finally:
+                engine.dispose()
+
+    def test_rejects_partial_existing_participant_response_settings(self) -> None:
+        with tempfile.TemporaryDirectory(
+            prefix="govoplan-scheduling-migration-"
+        ) as directory:
+            url = f"sqlite:///{Path(directory) / 'scheduling.db'}"
+            self._migrate(url)
+            engine = create_engine(url)
+            try:
+                with engine.begin() as connection:
+                    self._remove_scheduling_revision(
+                        connection,
+                        remove_privacy_column=False,
+                    )
+                    connection.execute(
+                        text(
+                            "ALTER TABLE scheduling_participants "
+                            "DROP COLUMN participation_gateway"
+                        )
+                    )
+
+                with self.assertRaisesRegex(
+                    RuntimeError,
+                    "partial scheduling_participants scheduling response settings",
+                ):
+                    self._migrate(url)
+
+                with engine.connect() as connection:
+                    heads = set(
+                        MigrationContext.configure(connection).get_current_heads()
+                    )
+                self.assertNotIn(_SCHEDULING_HEAD, heads)
+            finally:
+                engine.dispose()
+
+    def test_repairs_missing_participation_gateway_after_previous_head_was_stamped(self) -> None:
+        with tempfile.TemporaryDirectory(
+            prefix="govoplan-scheduling-migration-"
+        ) as directory:
+            url = f"sqlite:///{Path(directory) / 'scheduling.db'}"
+            self._migrate(url)
+            engine = create_engine(url)
+            try:
+                self._seed_scheduling_rows(engine)
+                with engine.begin() as connection:
+                    connection.execute(
+                        text(
+                            "DELETE FROM alembic_version WHERE version_num = :revision"
+                        ),
+                        {"revision": _SCHEDULING_HEAD},
+                    )
+                    connection.execute(
+                        text(
+                            "INSERT INTO alembic_version (version_num) VALUES (:revision)"
+                        ),
+                        {"revision": _SCHEDULING_RESPONSE_SETTINGS_REVISION},
+                    )
+                    connection.execute(
+                        text(
+                            "ALTER TABLE scheduling_participants "
+                            "DROP COLUMN participation_gateway"
+                        )
+                    )
+
+                self._migrate(url)
+
+                with engine.connect() as connection:
+                    heads = set(
+                        MigrationContext.configure(connection).get_current_heads()
+                    )
+                    participant_columns = {
+                        item["name"]
+                        for item in inspect(connection).get_columns(
+                            "scheduling_participants"
+                        )
+                    }
+                    participant = connection.execute(
+                        text(
+                            "SELECT display_name, email, participation_gateway "
+                            "FROM scheduling_participants WHERE id = 'participant-1'"
+                        )
+                    ).one()
+
+                self.assertIn(_SCHEDULING_HEAD, heads)
+                self.assertIn("participation_gateway", participant_columns)
+                self.assertEqual(
+                    tuple(participant),
+                    ("Ada", "ada@example.test", None),
+                )
+            finally:
+                engine.dispose()
+
 
 if __name__ == "__main__":
     unittest.main()

tests/test_module_boundary.py

@@ -0,0 +1,35 @@
+from __future__ import annotations
+
+import ast
+import pathlib
+import unittest
+
+
+ROOT = pathlib.Path(__file__).resolve().parents[1]
+
+
+class SchedulingModuleBoundaryTests(unittest.TestCase):
+    def test_runtime_source_does_not_import_poll_implementation_internals(self) -> None:
+        offenders: list[str] = []
+        source_root = ROOT / "src" / "govoplan_scheduling"
+        for path in source_root.rglob("*.py"):
+            tree = ast.parse(path.read_text(encoding="utf-8"))
+            imported_modules = [
+                node.module
+                for node in ast.walk(tree)
+                if isinstance(node, ast.ImportFrom) and node.module is not None
+            ]
+            imported_modules.extend(
+                alias.name
+                for node in ast.walk(tree)
+                if isinstance(node, ast.Import)
+                for alias in node.names
+            )
+            if any(module.startswith("govoplan_poll") for module in imported_modules):
+                offenders.append(str(path.relative_to(ROOT)))
+
+        self.assertEqual([], offenders)
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_participant_privacy.py

@@ -1,6 +1,8 @@
 from __future__ import annotations
 
 import unittest
+from datetime import datetime, timezone
+from unittest.mock import patch
 
 from sqlalchemy import create_engine
 from sqlalchemy.orm import Session, sessionmaker
@@ -89,11 +91,46 @@ class SchedulingParticipantPrivacyTests(unittest.TestCase):
             "tenant_id": "tenant-1",
             "title": "Privacy review",
             "status": "collecting",
+            "poll_id": "poll-internal",
             "organizer_user_id": "organizer-1",
+            "calendar_integration_enabled": True,
+            "calendar_id": "calendar-internal",
+            "calendar_freebusy_enabled": True,
+            "calendar_hold_enabled": True,
+            "create_calendar_event_on_decision": True,
+            "calendar_event_id": "event-internal",
+            "metadata_": {"connector_secret_ref": "secret-internal"},
         }
         if participant_visibility is not None:
             values["participant_visibility"] = participant_visibility
         request = SchedulingRequest(**values)
+        request.slots = [
+            SchedulingCandidateSlot(
+                tenant_id="tenant-1",
+                poll_option_id="poll-option-internal",
+                label="Monday morning",
+                start_at=datetime(2026, 7, 27, 9, tzinfo=timezone.utc),
+                end_at=datetime(2026, 7, 27, 10, tzinfo=timezone.utc),
+                timezone="Europe/Berlin",
+                position=0,
+                freebusy_checked_at=datetime(2026, 7, 21, 12, tzinfo=timezone.utc),
+                freebusy_status="busy",
+                freebusy_conflicts=[
+                    {
+                        "calendar_id": "calendar-internal",
+                        "event_id": "event-internal",
+                        "uid": "connector-uid-internal",
+                        "recurrence_id": "recurrence-internal",
+                        "start_at": "2026-07-27T09:30:00+00:00",
+                        "end_at": "2026-07-27T09:45:00+00:00",
+                        "status": "CONFIRMED",
+                    },
+                    {"error": "connector-internal failure"},
+                ],
+                tentative_hold_event_id="hold-internal",
+                metadata_={"provider_ref": "provider-internal"},
+            )
+        ]
         request.participants = [
             SchedulingParticipant(
                 tenant_id="tenant-1",
@@ -102,6 +139,9 @@ class SchedulingParticipantPrivacyTests(unittest.TestCase):
                 email="alice@example.test",
                 participant_type="internal",
                 status="responded",
+                poll_invitation_id="invitation-alice-internal",
+                last_invited_at=datetime(2026, 7, 20, 12, tzinfo=timezone.utc),
+                responded_at=datetime(2026, 7, 21, 12, tzinfo=timezone.utc),
                 metadata_={"private": "alice"},
             ),
             SchedulingParticipant(
@@ -145,17 +185,55 @@ class SchedulingParticipantPrivacyTests(unittest.TestCase):
     def test_secure_default_returns_own_row_and_aggregate_counts(self) -> None:
         request = self._request()
 
-        payload = self._participant_projection(request)
+        with patch(
+            "govoplan_scheduling.backend.service.notification_dispatch_provider",
+            return_value=object(),
+        ):
+            payload = self._participant_projection(request)
         response = SchedulingRequestResponse.model_validate(payload)
 
         self.assertEqual(request.participant_visibility, "aggregates_only")
         self.assertEqual(response.participant_visibility, "aggregates_only")
         self.assertEqual(response.effective_participant_visibility, "aggregates_only")
         self.assertEqual([participant.display_name for participant in response.participants], ["Alice"])
-        self.assertEqual(response.participants[0].email, "alice@example.test")
+        own = response.participants[0]
+        self.assertTrue(own.is_current_participant)
+        self.assertEqual(own.email, "alice@example.test")
+        self.assertIsNone(own.respondent_id)
+        self.assertIsNone(own.participant_type)
+        self.assertIsNone(own.required)
+        self.assertIsNone(own.poll_invitation_id)
+        self.assertEqual(own.metadata, {})
         self.assertEqual(response.participant_aggregate.total, 2)
         self.assertEqual(response.participant_aggregate.status_counts["responded"], 1)
         self.assertEqual(response.participant_aggregate.status_counts["invited"], 1)
+        self.assertIsNone(response.tenant_id)
+        self.assertIsNone(response.poll_id)
+        self.assertIsNone(response.organizer_user_id)
+        self.assertIsNone(response.calendar_integration_enabled)
+        self.assertIsNone(response.calendar_id)
+        self.assertIsNone(response.calendar_freebusy_enabled)
+        self.assertIsNone(response.calendar_hold_enabled)
+        self.assertIsNone(response.create_calendar_event_on_decision)
+        self.assertIsNone(response.calendar_event_id)
+        self.assertIsNone(response.public_participation_policy_enforcement_available)
+        self.assertIsNone(response.participant_invitation_delivery_available)
+        self.assertEqual(response.metadata, {})
+        slot = response.slots[0]
+        self.assertIsNone(slot.poll_option_id)
+        self.assertEqual(slot.freebusy_status, "busy")
+        self.assertEqual(
+            slot.freebusy_conflicts,
+            [
+                {
+                    "start_at": "2026-07-27T09:30:00+00:00",
+                    "end_at": "2026-07-27T09:45:00+00:00",
+                    "status": "CONFIRMED",
+                }
+            ],
+        )
+        self.assertIsNone(slot.tentative_hold_event_id)
+        self.assertEqual(slot.metadata, {})
 
     def test_configured_roster_returns_other_names_and_statuses_with_sensitive_fields_redacted(self) -> None:
         request = self._request(participant_visibility="names_and_statuses")
@@ -165,11 +243,15 @@ class SchedulingParticipantPrivacyTests(unittest.TestCase):
         self.assertEqual(response.effective_participant_visibility, "names_and_statuses")
         own = next(participant for participant in response.participants if participant.display_name == "Alice")
         other = next(participant for participant in response.participants if participant.display_name == "Bob")
-        self.assertEqual(own.respondent_id, "alice-id")
+        self.assertTrue(own.is_current_participant)
+        self.assertIsNone(own.respondent_id)
         self.assertEqual(own.email, "alice@example.test")
         self.assertEqual(other.status, "invited")
+        self.assertFalse(other.is_current_participant)
         self.assertIsNone(other.respondent_id)
         self.assertIsNone(other.email)
+        self.assertIsNone(other.participant_type)
+        self.assertIsNone(other.required)
         self.assertIsNone(other.poll_invitation_id)
         self.assertEqual(other.metadata, {})
 
@@ -199,6 +281,34 @@ class SchedulingParticipantPrivacyTests(unittest.TestCase):
                 "bob@example.test",
             })
             self.assertTrue(response.participant_visibility_decision.details["management_access"])
+            self.assertEqual(response.tenant_id, "tenant-1")
+            self.assertEqual(response.poll_id, "poll-internal")
+            self.assertEqual(response.organizer_user_id, "organizer-1")
+            self.assertEqual(response.calendar_id, "calendar-internal")
+            self.assertEqual(response.calendar_event_id, "event-internal")
+            self.assertEqual(response.metadata["connector_secret_ref"], "secret-internal")
+            self.assertEqual(response.slots[0].poll_option_id, "poll-option-internal")
+            self.assertEqual(
+                response.slots[0].freebusy_conflicts[0]["uid"],
+                "connector-uid-internal",
+            )
+            self.assertEqual(response.slots[0].tentative_hold_event_id, "hold-internal")
+            self.assertFalse(response.participant_invitation_delivery_available)
+
+        with patch(
+            "govoplan_scheduling.backend.service.notification_dispatch_provider",
+            return_value=object(),
+        ):
+            delivery_enabled = SchedulingRequestResponse.model_validate(
+                scheduling_request_response(
+                    request,
+                    actor_ids=("manager-1",),
+                    actor_user_id="manager-1",
+                    can_manage=True,
+                )
+            )
+
+        self.assertTrue(delivery_enabled.participant_invitation_delivery_available)
 
     def test_optional_policy_can_reduce_but_cannot_broaden_visibility(self) -> None:
         restricting_policy = _PrivacyPolicy("aggregates_only")
@@ -211,8 +321,8 @@ class SchedulingParticipantPrivacyTests(unittest.TestCase):
         self.assertEqual([participant.display_name for participant in reduced.participants], ["Alice"])
         self.assertTrue(reduced.participant_visibility_decision.policy_applied)
         self.assertEqual(reduced.participant_visibility_decision.reason, "Tenant participant privacy policy")
-        self.assertEqual(reduced.participant_visibility_decision.source_path[0]["path"], "tenant:tenant-1")
-        self.assertTrue(reduced.participant_visibility_decision.details["provider_session_available"])
+        self.assertEqual(reduced.participant_visibility_decision.source_path, [])
+        self.assertEqual(reduced.participant_visibility_decision.details, {})
         self.assertEqual(restricting_policy.requests[0].actor_user_id, "alice-account")
 
         widening_policy = _PrivacyPolicy("names_and_statuses")

tests/test_people_search.py

@@ -0,0 +1,138 @@
+from __future__ import annotations
+
+from types import SimpleNamespace
+import unittest
+
+from fastapi import HTTPException
+
+from govoplan_core.auth import ApiPrincipal
+from govoplan_core.core.access import PrincipalRef
+from govoplan_core.core.people import (
+    CAPABILITY_ACCESS_PEOPLE_SEARCH,
+    PeopleSearchGroup,
+    PersonSearchCandidate,
+)
+from govoplan_scheduling.backend.manifest import WRITE_SCOPE
+from govoplan_scheduling.backend.router import api_search_scheduling_people
+from govoplan_scheduling.backend.runtime import configure_runtime
+
+
+class _Registry:
+    def __init__(self, capabilities: dict[str, object] | None = None) -> None:
+        self.capabilities = capabilities or {}
+
+    def has_capability(self, name: str) -> bool:
+        return name in self.capabilities
+
+    def capability(self, name: str) -> object:
+        return self.capabilities[name]
+
+
+class _PeopleProvider:
+    def __init__(self) -> None:
+        self.calls: list[tuple[object, object, str, int]] = []
+
+    def search_people(
+        self,
+        session: object,
+        principal: object,
+        *,
+        query: str,
+        limit: int = 25,
+    ) -> tuple[PeopleSearchGroup, ...]:
+        self.calls.append((session, principal, query, limit))
+        return (
+            PeopleSearchGroup(
+                key="accounts",
+                label="Accounts",
+                candidates=(
+                    PersonSearchCandidate(
+                        selection_key="account:account-2",
+                        kind="account",
+                        reference_id="account-2",
+                        display_name="Ada Lovelace",
+                        email="ada@example.test",
+                        source_module="access",
+                        source_label="Accounts",
+                        source_ref="access:account:account-2",
+                        source_revision="revision-1",
+                        description="Research",
+                        provenance={"tenant_id": "tenant-1", "internal": "secret"},
+                        metadata={"internal_group_ids": ["group-1"]},
+                    ),
+                ),
+            ),
+        )
+
+
+def _principal(*scopes: str) -> ApiPrincipal:
+    return ApiPrincipal(
+        principal=PrincipalRef(
+            account_id="account-1",
+            membership_id="membership-1",
+            tenant_id="tenant-1",
+            email="organizer@example.test",
+            display_name="Organizer",
+            scopes=frozenset(scopes),
+        ),
+        account=SimpleNamespace(id="account-1"),
+        user=SimpleNamespace(id="membership-1"),
+    )
+
+
+class SchedulingPeopleSearchTests(unittest.TestCase):
+    def tearDown(self) -> None:
+        configure_runtime(registry=_Registry())
+
+    def test_search_uses_principal_aware_core_aggregator_and_redacts_provider_internals(self) -> None:
+        provider = _PeopleProvider()
+        registry = _Registry({CAPABILITY_ACCESS_PEOPLE_SEARCH: provider})
+        configure_runtime(registry=registry)
+        session = object()
+        principal = _principal(WRITE_SCOPE)
+
+        response = api_search_scheduling_people(
+            query="ada",
+            limit=12,
+            session=session,  # type: ignore[arg-type] - provider contract is intentionally generic
+            principal=principal,
+        )
+
+        self.assertEqual([(session, principal, "ada", 12)], provider.calls)
+        payload = response.model_dump()
+        self.assertEqual("account:account-2", payload["groups"][0]["candidates"][0]["selection_key"])
+        self.assertEqual("revision-1", payload["groups"][0]["candidates"][0]["source_revision"])
+        self.assertNotIn("source_ref", payload["groups"][0]["candidates"][0])
+        self.assertNotIn("provenance", payload["groups"][0]["candidates"][0])
+        self.assertNotIn("metadata", payload["groups"][0]["candidates"][0])
+
+    def test_search_is_empty_when_no_optional_directory_provider_is_installed(self) -> None:
+        configure_runtime(registry=_Registry())
+
+        response = api_search_scheduling_people(
+            query="ada",
+            limit=25,
+            session=object(),  # type: ignore[arg-type]
+            principal=_principal(WRITE_SCOPE),
+        )
+
+        self.assertEqual([], response.groups)
+
+    def test_search_requires_scheduling_write_or_admin_access(self) -> None:
+        provider = _PeopleProvider()
+        configure_runtime(registry=_Registry({CAPABILITY_ACCESS_PEOPLE_SEARCH: provider}))
+
+        with self.assertRaises(HTTPException) as raised:
+            api_search_scheduling_people(
+                query="ada",
+                limit=25,
+                session=object(),  # type: ignore[arg-type]
+                principal=_principal("scheduling:schedule:read"),
+            )
+
+        self.assertEqual(403, raised.exception.status_code)
+        self.assertEqual([], provider.calls)
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_reconciliation_plans.py

@@ -0,0 +1,283 @@
+from __future__ import annotations
+
+from datetime import datetime, timedelta, timezone
+
+import pytest
+
+from govoplan_scheduling.backend.db.models import (
+    SchedulingCandidateSlot,
+    SchedulingParticipant,
+    SchedulingRequest,
+)
+from govoplan_scheduling.backend.schemas import (
+    SchedulingCandidateSlotReconcileInput,
+    SchedulingParticipantReconcileInput,
+    SchedulingRequestUpdateRequest,
+)
+from govoplan_scheduling.backend.service import (
+    SchedulingError,
+    _plan_scheduling_participant_reconciliation,
+    _plan_scheduling_request_update,
+    _plan_scheduling_slot_reconciliation,
+    scheduling_participant_revision,
+    scheduling_slot_revision,
+)
+
+
+NOW = datetime(2026, 7, 29, 9, tzinfo=timezone.utc)
+
+
+def _request() -> SchedulingRequest:
+    return SchedulingRequest(
+        id="request-1",
+        tenant_id="tenant-1",
+        title="Steering group",
+        timezone="Europe/Berlin",
+        status="collecting",
+        poll_id="poll-1",
+        allow_external_participants=True,
+        allow_participant_updates=True,
+        result_visibility="after_close",
+        participant_visibility="aggregates_only",
+        notify_on_answers=True,
+        single_choice=False,
+        max_participants_per_option=None,
+        allow_maybe=True,
+        allow_comments=False,
+        participant_email_required=False,
+        anonymous_password_protection_enabled=False,
+    )
+
+
+def _slot(
+    request: SchedulingRequest,
+    *,
+    slot_id: str,
+    position: int,
+    start_offset: int,
+) -> SchedulingCandidateSlot:
+    slot = SchedulingCandidateSlot(
+        id=slot_id,
+        tenant_id=request.tenant_id,
+        request=request,
+        poll_option_id=f"option-{slot_id}",
+        label=f"Slot {position + 1}",
+        start_at=NOW + timedelta(hours=start_offset),
+        end_at=NOW + timedelta(hours=start_offset + 1),
+        timezone=request.timezone,
+        position=position,
+        freebusy_conflicts=[],
+        metadata_={},
+    )
+    return slot
+
+
+def _slot_input(
+    slot: SchedulingCandidateSlot,
+    *,
+    label: str | None = None,
+) -> SchedulingCandidateSlotReconcileInput:
+    return SchedulingCandidateSlotReconcileInput(
+        id=slot.id,
+        revision=scheduling_slot_revision(slot),
+        label=label or slot.label,
+        start_at=slot.start_at,
+        end_at=slot.end_at,
+        timezone=slot.timezone,
+        location=slot.location,
+        metadata=slot.metadata_ or {},
+    )
+
+
+def _participant(
+    request: SchedulingRequest,
+    *,
+    participant_id: str,
+    respondent_id: str,
+    email: str,
+    required: bool,
+    status: str = "invited",
+    invitation_id: str | None = None,
+) -> SchedulingParticipant:
+    return SchedulingParticipant(
+        id=participant_id,
+        tenant_id=request.tenant_id,
+        request=request,
+        respondent_id=respondent_id,
+        display_name=participant_id.title(),
+        email=email,
+        participant_type="internal",
+        required=required,
+        status=status,
+        poll_invitation_id=invitation_id,
+        participation_gateway="scheduling" if invitation_id else None,
+        metadata_={},
+    )
+
+
+def _participant_input(
+    participant: SchedulingParticipant,
+    **changes: object,
+) -> SchedulingParticipantReconcileInput:
+    values = {
+        "id": participant.id,
+        "revision": scheduling_participant_revision(participant),
+        "respondent_id": participant.respondent_id,
+        "display_name": participant.display_name,
+        "email": participant.email,
+        "participant_type": participant.participant_type,
+        "required": participant.required,
+        "metadata": participant.metadata_ or {},
+    }
+    values.update(changes)
+    return SchedulingParticipantReconcileInput.model_validate(values)
+
+
+def test_slot_plan_is_inspectable_and_does_not_mutate_models() -> None:
+    request = _request()
+    first = _slot(request, slot_id="slot-1", position=0, start_offset=1)
+    second = _slot(request, slot_id="slot-2", position=1, start_offset=3)
+    supplied = [
+        _slot_input(first, label="Updated first slot"),
+        SchedulingCandidateSlotReconcileInput(
+            label="New slot",
+            start_at=NOW + timedelta(hours=5),
+            end_at=NOW + timedelta(hours=6),
+            timezone=request.timezone,
+        ),
+    ]
+
+    plan = _plan_scheduling_slot_reconciliation(
+        request=request,
+        supplied_slots=supplied,
+        option_mutation_available=True,
+    )
+
+    assert [update.slot_id for update in plan.updates] == ["slot-1"]
+    assert plan.updates[0].changes.label == "Updated first slot"
+    assert len(plan.additions) == 1
+    assert plan.removals == ("slot-2",)
+    assert plan.changed is True
+    assert first.label == "Slot 1"
+    assert second.deleted_at is None
+    assert len(request.slots) == 2
+
+
+def test_exact_slot_replay_produces_a_noop_plan() -> None:
+    request = _request()
+    first = _slot(request, slot_id="slot-1", position=0, start_offset=1)
+
+    plan = _plan_scheduling_slot_reconciliation(
+        request=request,
+        supplied_slots=[_slot_input(first)],
+        option_mutation_available=True,
+    )
+
+    assert plan.changed is False
+    assert plan.updates == ()
+    assert plan.additions == ()
+    assert plan.removals == ()
+
+
+def test_slot_plan_rejects_removal_of_a_tentative_calendar_hold() -> None:
+    request = _request()
+    held = _slot(request, slot_id="slot-held", position=0, start_offset=1)
+    held.tentative_hold_event_id = "event-1"
+
+    with pytest.raises(SchedulingError, match="tentative calendar hold"):
+        _plan_scheduling_slot_reconciliation(
+            request=request,
+            supplied_slots=[],
+            option_mutation_available=True,
+        )
+
+
+def test_participant_plan_distinguishes_updates_additions_and_retirements() -> None:
+    request = _request()
+    alice = _participant(
+        request,
+        participant_id="alice",
+        respondent_id="user-alice",
+        email="alice@example.test",
+        required=True,
+        invitation_id="invitation-alice",
+    )
+    bob = _participant(
+        request,
+        participant_id="bob",
+        respondent_id="user-bob",
+        email="bob@example.test",
+        required=False,
+        status="responded",
+    )
+    supplied = [
+        _participant_input(alice, email="alice.new@example.test", required=False),
+        SchedulingParticipantReconcileInput(
+            respondent_id="user-charlie",
+            display_name="Charlie",
+            email="charlie@example.test",
+            participant_type="internal",
+            required=True,
+        ),
+    ]
+
+    plan = _plan_scheduling_participant_reconciliation(
+        request=request,
+        supplied_participants=supplied,
+        participation_available=True,
+        retirement_available=True,
+    )
+
+    assert len(plan.updates) == 1
+    assert plan.updates[0].participant_id == "alice"
+    assert plan.updates[0].revoke_invitation is True
+    assert set(plan.updates[0].changed_fields) == {"email", "required"}
+    assert plan.creations[0].replaces_participant_id is None
+    assert plan.creations[0].supplied.required is True
+    assert plan.retirements == ("bob",)
+    assert alice.email == "alice@example.test"
+    assert alice.required is True
+    assert bob.status == "responded"
+
+
+def test_request_plan_records_invitation_expiry_work_without_tokens() -> None:
+    request = _request()
+    participant = _participant(
+        request,
+        participant_id="alice",
+        respondent_id="user-alice",
+        email="alice@example.test",
+        required=True,
+        invitation_id="invitation-alice",
+    )
+    deadline = NOW + timedelta(days=2)
+
+    plan = _plan_scheduling_request_update(
+        request=request,
+        payload=SchedulingRequestUpdateRequest(deadline_at=deadline),
+        participation_available=True,
+    )
+
+    assert plan.deadline_changed is True
+    assert plan.retained_invitation_ids == ((participant.id, "invitation-alice"),)
+    assert "token" not in repr(plan).casefold()
+    assert request.deadline_at is None
+
+
+def test_request_plan_rejects_policy_change_after_link_issuance() -> None:
+    request = _request()
+    _participant(
+        request,
+        participant_id="alice",
+        respondent_id="user-alice",
+        email="alice@example.test",
+        required=True,
+        invitation_id="invitation-alice",
+    )
+
+    with pytest.raises(SchedulingError, match="cannot change"):
+        _plan_scheduling_request_update(
+            request=request,
+            payload=SchedulingRequestUpdateRequest(single_choice=True),
+            participation_available=True,
+        )

webui/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@govoplan/scheduling-webui",
-  "version": "0.1.9",
+  "version": "0.1.11",
   "private": true,
   "type": "module",
   "main": "src/index.ts",
@@ -18,11 +18,11 @@
     "test:ui-structure": "node scripts/test-scheduling-page-structure.mjs"
   },
   "peerDependencies": {
-    "@govoplan/core-webui": "^0.1.9",
+    "@govoplan/core-webui": "^0.1.11",
     "lucide-react": "^1.23.0",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
-    "react-router-dom": "^7.1.1",
+    "react-router-dom": ">=7.18.2 <8",
     "@vitejs/plugin-react": "^4.3.4",
     "typescript": "^5.7.2",
     "vite": "^6.0.6"

webui/scripts/test-scheduling-page-structure.mjs

@@ -3,73 +3,158 @@ import { readFileSync } from "node:fs";
 import { fileURLToPath } from "node:url";
 
 const pagePath = fileURLToPath(new URL("../src/features/scheduling/SchedulingPage.tsx", import.meta.url));
+const publicPagePath = fileURLToPath(new URL("../src/features/scheduling/SchedulingPublicPage.tsx", import.meta.url));
 const apiPath = fileURLToPath(new URL("../src/api/scheduling.ts", import.meta.url));
+const modulePath = fileURLToPath(new URL("../src/module.ts", import.meta.url));
 const page = readFileSync(pagePath, "utf8");
+const publicPage = readFileSync(publicPagePath, "utf8");
 const api = readFileSync(apiPath, "utf8");
+const moduleSource = readFileSync(modulePath, "utf8");
 
 assert.match(page, /usePlatformUiCapability<CalendarPickerUiCapability>\("calendar\.picker"\)/);
 assert.match(page, /hasScope\(auth, "calendar:calendar:read"\)/);
 assert.match(page, /Boolean\(calendarPickerCapability\) && canReadCalendars && canReadAvailability && canWriteCalendarEvent/);
 assert.doesNotMatch(page, /@govoplan\/calendar-webui|govoplan-calendar\/webui/);
-assert.match(page, /Card,[\s\S]*DataGrid,[\s\S]*DataGridEmptyAction,[\s\S]*DataGridRowActions,[\s\S]*ModuleSubnav,[\s\S]*ToggleSwitch,[\s\S]*from "@govoplan\/core-webui"/);
-assert.match(page, /SelectionList,[\s\S]*SelectionListItem,[\s\S]*from "@govoplan\/core-webui"/);
+assert.match(page, /Card,[\s\S]*DataGrid,[\s\S]*DataGridRowActions,[\s\S]*FormField,[\s\S]*MetricCard,[\s\S]*PasswordField,[\s\S]*PeoplePicker,[\s\S]*SelectionList,[\s\S]*ToggleSwitch,[\s\S]*from "@govoplan\/core-webui"/);
 assert.doesNotMatch(page, /@govoplan\/core-webui\/src\//);
-assert.match(page, /className="scheduling-full-editor"/);
-assert.match(page, /className="scheduling-page-actions"/);
 
-const editorActions = page.slice(
-  page.indexOf('<div className="scheduling-page-actions">'),
-  page.indexOf('</div>', page.indexOf('<div className="scheduling-page-actions">'))
-);
-assert.ok(editorActions.indexOf("I18N.discard") < editorActions.indexOf("I18N.save"));
-assert.match(editorActions, /form="scheduling-create-form"/);
-
-const createBranchStart = page.indexOf("  if (creating) {");
-const createReturnStart = page.indexOf("\n    return (", createBranchStart);
-const browseBranchStart = page.indexOf("\n  return (", createReturnStart + 1);
-const createBranch = page.slice(createBranchStart, browseBranchStart);
-const browseBranch = page.slice(browseBranchStart);
-assert.match(createBranch, /<ModuleSubnav/);
-assert.match(createBranch, /className="scheduling-create-subnav"/);
-assert.doesNotMatch(browseBranch, /scheduling-sidebar|<aside/);
-
-assert.match(browseBranch, /<h1>\{I18N\.requests\}<\/h1>/);
-assert.match(browseBranch, /<Plus aria-hidden="true" size=\{16\} \/> \{I18N\.add\}/);
+assert.match(page, /className="scheduling-workspace-layout"/);
+assert.match(page, /<aside className="scheduling-request-sidebar">/);
+assert.match(page, /<section className="scheduling-main-panel">/);
+assert.match(page, /title=\{I18N\.requests\}[\s\S]*<Plus aria-hidden="true" size=\{16\} \/> \{I18N\.add\}/);
 assert.match(page, /title=\{I18N\.myRequests\}/);
 assert.match(page, /title=\{I18N\.invitedRequests\}/);
+assert.ok(page.indexOf("title={I18N.myRequests}") < page.indexOf("title={I18N.invitedRequests}"));
 assert.match(page, /<SelectionList label=\{title\} className="scheduling-request-list">/);
 assert.match(page, /<SelectionListItem[\s\S]*selected=\{selectedId === request\.id\}[\s\S]*className="scheduling-list-item"/);
-assert.doesNotMatch(page, /<button[\s\S]{0,160}scheduling-list-item/);
-assert.match(createBranch, /<Card title=\{I18N\.basicInformation\}>/);
-assert.match(createBranch, /<Card title=\{I18N\.calendarIntegration\}>/);
+assert.match(page, /className="scheduling-list-item"[\s\S]{0,100}disabled=\{disabled\}/);
+
+assert.match(page, /editorMode \? \(/);
+assert.match(page, /id="scheduling-editor-form"/);
+assert.doesNotMatch(page, /ModuleSubnav|scheduling-create-subnav|scheduling-full-editor/);
+const editorStart = page.indexOf('<div className="scheduling-editor-surface">');
+const editorEnd = page.indexOf('</form>', editorStart);
+const editor = page.slice(editorStart, editorEnd);
+assert.ok(editor.indexOf("I18N.discard") < editor.indexOf("I18N.save"));
+assert.match(editor, /form="scheduling-editor-form"/);
+assert.match(editor, /<Card title=\{I18N\.basicInformation\}>/);
+assert.match(editor, /<Card title=\{I18N\.calendarIntegration\}>/);
 assert.match(page, /<Card title=\{I18N\.candidateSlots\}>/);
 assert.match(page, /<Card title=\{I18N\.participants\}>/);
-assert.match(createBranch, /<ToggleSwitch[\s\S]*checked=\{calendarEnabled\}/);
-assert.match(page, /<ToggleSwitch[\s\S]*checked=\{participantRosterVisible\}/);
-assert.match(page, /participant_visibility: participantRosterVisible \? "names_and_statuses" : "aggregates_only"/);
+assert.match(page, /<Card title=\{I18N\.generalSettings\}>/);
+assert.match(page, /<Card title=\{I18N\.participantPrivacy\}>/);
+assert.match(editor, /<FormField label=\{I18N\.title\}>/);
+assert.match(page, /useUnsavedDraftGuard\(/);
+assert.match(page, /requestDiscard\(exitEditor\)/);
+assert.match(page, /dirty: responseDirty,[\s\S]*onSave: persistAvailability,[\s\S]*onDiscard: resetResponseDraft/);
+assert.doesNotMatch(page, /window\.(?:alert|confirm)\(/);
+
+for (const setting of [
+  "participantRosterVisible",
+  "notifyOnAnswers",
+  "singleChoice",
+  "participantLimitEnabled",
+  "allowMaybe",
+  "allowComments",
+  "participantEmailRequired",
+  "anonymousPasswordProtectionEnabled"
+]) {
+  assert.match(page, new RegExp(`checked=\\{${setting}\\}`));
+}
+assert.match(page, /<PasswordField[\s\S]*minLength=\{8\}/);
+assert.match(page, /type="number"[\s\S]*min=\{1\}/);
+assert.match(page, /min=\{addLocalMinutes\(slot\.start_at, 1\)\}/);
+assert.match(page, /allow_external_participants: allowExternalParticipants/);
+assert.doesNotMatch(page, /usesGatewayPolicy|updateSchedulingCandidateSlot/);
+assert.match(page, /public_participation_policy_enforcement_available/);
+assert.match(page, /const canCreateOrWrite = canWrite \|\| canAdminister/);
+assert.match(page, /policyLocked=\{participationPolicyLocked\}/);
+
 assert.match(page, /id="scheduling-create-candidate-slots-grid"/);
-assert.match(page, /id="scheduling-create-participants-grid"/);
+assert.match(page, /id="scheduling-participant-picker"/);
 assert.match(page, /id="scheduling-candidate-slots-grid"/);
 assert.match(page, /id="scheduling-participants-grid"/);
 assert.match(page, /<DataGridRowActions/);
-assert.match(page, /<DataGridEmptyAction/);
+assert.match(page, /disabled=\{!canCreateOrWrite\}[\s\S]{0,80}reorderable/);
+assert.doesNotMatch(page, /reorderable=\{editorMode === "create"\}/);
 assert.doesNotMatch(page, /EmailAddressInput|MailboxAddress|addressSuggestions|addressLookupQuery/);
-assert.match(page, /type="email"[\s\S]*aria-label=\{I18N\.participantEmail\}/);
-assert.doesNotMatch(page, /header: I18N\.required|<table|scheduling-table|scheduling-card(?:\s|"|`)/);
-assert.match(page, /<TableActionGroup[\s\S]*label: i18nMessage\("i18n:govoplan-scheduling\.decide_on_value/);
+assert.doesNotMatch(page, /<input[\s\S]{0,220}aria-label=\{I18N\.participantEmail\}/);
+assert.match(page, /allowManualExternal=\{allowExternalParticipants\}/);
+assert.match(page, /search=\{participantSearch\}/);
+assert.doesNotMatch(page, /<table|scheduling-table|scheduling-card(?:\s|"|`)/);
+assert.match(page, /<TableActionGroup[\s\S]*disabled: saving \|\| !decisionEnabled/);
+assert.match(page, /showDecisionAction=\{canManageSelected\}/);
+assert.match(page, /<IconButton[\s\S]*label=\{I18N\.refresh\}/);
+assert.doesNotMatch(page, /AdminIconButton/);
+
+const participantGridStart = page.indexOf("function ParticipantsGrid(");
+const participantGridEnd = page.indexOf("function invitationActionDisabledReason", participantGridStart);
+const participantGrid = page.slice(participantGridStart, participantGridEnd);
+assert.match(participantGrid, /\.\.\.\(canManage \? \[\{/);
+assert.match(participantGrid, /minimumSlots=\{3\}/);
+assert.ok(participantGrid.indexOf('id: "copy-invitation"') < participantGrid.indexOf('id: "send-invitation"'));
+assert.ok(participantGrid.indexOf('id: "send-invitation"') < participantGrid.indexOf('id: "revoke-invitation"'));
+assert.match(participantGrid, /schedulingInvitationActionBlocks\(request, participant, now\)/);
+assert.match(participantGrid, /disabledReason: copyDisabledReason/);
+assert.match(participantGrid, /disabledReason: deliveryDisabledReason/);
+assert.match(participantGrid, /disabledReason: revokeDisabledReason/);
+assert.match(page, /<ConfirmDialog[\s\S]*title=\{I18N\.revokeInvitationLabel\}[\s\S]*tone="danger"/);
+assert.match(page, /navigator\.clipboard\.writeText\(value\)/);
+assert.match(page, /navigator\.clipboard\.write\(\[new ClipboardItem/);
+assert.match(page, /schedulingPublicInvitationUrl\(response\.action_url, window\.location\.origin\)/);
+assert.match(page, /\["failed", "skipped"\]\.includes\(result\.status\)/);
+assert.match(page, /isApiError\(err, 409\)/);
+assert.match(page, /scheduleExpiryRefresh/);
+assert.doesNotMatch(page, /(?:localStorage|sessionStorage).*action_url|action_url.*(?:localStorage|sessionStorage)/);
+
 assert.match(page, /submitSchedulingAvailability\(settings, selected\.id/);
 assert.match(page, /option_revision: slot\.revision/);
 assert.match(page, /getSchedulingAvailabilityResponse\(settings, selected\.id\)/);
-assert.match(page, /setAvailability\(Object\.fromEntries\(response\.answers\.map/);
-assert.match(page, /selected\.participant_aggregate\.total/);
+assert.match(page, /const answers = Object\.fromEntries\(response\.answers\.map/);
+assert.match(page, /setSavedAvailability\(answers\)/);
+assert.match(page, /const comment = response\.comment \?\? ""/);
+assert.match(page, /setSavedAvailabilityComment\(comment\)/);
+assert.match(page, /<ParticipationStats/);
 assert.match(page, /selected\.effective_participant_visibility === "names_and_statuses"/);
-assert.match(api, /participant_visibility: SchedulingParticipantVisibility/);
-assert.match(api, /participant_aggregate: SchedulingParticipantAggregate/);
 assert.doesNotMatch(page, /<p>\{selected\.calendar_id\}<\/p>/);
 assert.match(page, /className="scheduling-selected-calendar"/);
-assert.match(page, /showPlanningCalendarActions/);
-assert.match(page, /title=\{!canReadAvailability \? I18N\.requiresAvailabilityRead/);
+
+for (const field of [
+  "notify_on_answers",
+  "single_choice",
+  "max_participants_per_option",
+  "allow_maybe",
+  "allow_comments",
+  "participant_email_required",
+  "anonymous_password_protection_enabled",
+  "public_participation_policy_enforcement_available",
+  "participant_invitation_delivery_available"
+]) {
+  assert.match(api, new RegExp(`${field}:`));
+}
+assert.match(api, /method: "PATCH"/);
+assert.match(api, /\/api\/v1\/scheduling\/people\?/);
+assert.doesNotMatch(api, /address-lookup/);
+assert.match(page, /slots: slots\.map\(\(slot\) => \(\{/);
+assert.match(page, /participants: participants\.map\(participantPayload\)/);
+assert.doesNotMatch(page, /create_participant_invitations/);
 assert.match(api, /\/api\/v1\/scheduling\/requests\/\$\{requestId\}\/responses/);
 assert.match(api, /\/api\/v1\/scheduling\/requests\/\$\{requestId\}\/responses\/me/);
+assert.match(api, /issueSchedulingParticipantInvitation\([\s\S]*json\(\{ action, participant_revision: participantRevision \}\)/);
+assert.match(api, /revokeSchedulingParticipantInvitation\([\s\S]*method: "DELETE"[\s\S]*participant_revision: participantRevision/);
+assert.match(api, /participants\/\$\{encodeURIComponent\(participantId\)\}\/invitation/);
+assert.match(api, /\/api\/v1\/scheduling\/public\/\$\{encodeURIComponent\(requestId\)\}\/\$\{encodeURIComponent\(token\)\}/);
+assert.match(page, /useSearchParams\(\)/);
+assert.match(page, /Promise\.allSettled/);
 
-console.log("Scheduling page structure satisfies the focused list/create/respond contract.");
+assert.match(moduleSource, /publicRoutes:[\s\S]*path: "\/scheduling\/public\/:requestId\/:token"/);
+assert.match(moduleSource, /SchedulingPublicPage/);
+assert.match(publicPage, /Card,[\s\S]*DismissibleAlert,[\s\S]*FormField,[\s\S]*LoadingFrame,[\s\S]*from "@govoplan\/core-webui"/);
+assert.match(publicPage, /getPublicSchedulingParticipation\(settings, requestId, token, \{\}\)/);
+assert.match(publicPage, /applySchedulingAvailabilityChoice\(/);
+assert.match(publicPage, /option_revision: slot\.revision/);
+assert.match(publicPage, /idempotency_key: newIdempotencyKey\(\)/);
+assert.doesNotMatch(publicPage, /window\.(?:alert|confirm)\(/);
+assert.doesNotMatch(publicPage, /(?:localStorage|sessionStorage).*token|token.*(?:localStorage|sessionStorage)/);
+
+console.log("Scheduling pages satisfy the two-pane editor, public response, and policy contracts.");

webui/src/api/scheduling.ts

@@ -1,4 +1,8 @@
-import { apiFetch, type ApiSettings } from "@govoplan/core-webui";
+import {
+  apiFetch,
+  type ApiSettings,
+  type PeoplePickerSearchGroup
+} from "@govoplan/core-webui";
 
 export type SchedulingStatus = "draft" | "collecting" | "closed" | "decided" | "handed_off" | "cancelled" | "archived";
 export type SchedulingParticipantVisibility = "aggregates_only" | "names_and_statuses";
@@ -23,11 +27,13 @@ export type SchedulingCandidateSlot = {
 
 export type SchedulingParticipant = {
   id: string;
+  revision?: string | null;
+  is_current_participant: boolean;
   respondent_id?: string | null;
   display_name?: string | null;
   email?: string | null;
-  participant_type: string;
-  required: boolean;
+  participant_type: string | null;
+  required: boolean | null;
   status: string;
   poll_invitation_id?: string | null;
   invitation_token?: string | null;
@@ -52,7 +58,7 @@ export type SchedulingParticipantVisibilityDecision = {
 
 export type SchedulingRequest = {
   id: string;
-  tenant_id: string;
+  tenant_id: string | null;
   title: string;
   description?: string | null;
   location?: string | null;
@@ -69,14 +75,25 @@ export type SchedulingRequest = {
   effective_participant_visibility: SchedulingParticipantVisibility;
   participant_aggregate: SchedulingParticipantAggregate;
   participant_visibility_decision: SchedulingParticipantVisibilityDecision;
-  calendar_integration_enabled: boolean;
+  notify_on_answers: boolean;
+  single_choice: boolean;
+  max_participants_per_option: number | null;
+  allow_maybe: boolean;
+  allow_comments: boolean;
+  participant_email_required: boolean;
+  anonymous_password_protection_enabled: boolean;
+  public_participation_policy_enforcement_available: boolean | null;
+  public_participation_policy_enforcement_reason?: string | null;
+  participant_invitation_delivery_available: boolean | null;
+  calendar_integration_enabled: boolean | null;
   calendar_id?: string | null;
-  calendar_freebusy_enabled: boolean;
-  calendar_hold_enabled: boolean;
-  create_calendar_event_on_decision: boolean;
+  calendar_freebusy_enabled: boolean | null;
+  calendar_hold_enabled: boolean | null;
+  create_calendar_event_on_decision: boolean | null;
   calendar_event_id?: string | null;
   handed_off_at?: string | null;
   cancelled_at?: string | null;
+  cancellation_notice_until?: string | null;
   created_at: string;
   updated_at: string;
   metadata?: Record<string, unknown>;
@@ -117,6 +134,14 @@ export type SchedulingRequestCreatePayload = {
   allow_participant_updates?: boolean;
   result_visibility?: "organizer" | "after_response" | "after_close" | "public";
   participant_visibility?: SchedulingParticipantVisibility;
+  notify_on_answers?: boolean;
+  single_choice?: boolean;
+  max_participants_per_option?: number | null;
+  allow_maybe?: boolean;
+  allow_comments?: boolean;
+  participant_email_required?: boolean;
+  anonymous_password_protection_enabled?: boolean;
+  anonymous_password?: string;
   calendar?: {
     enabled?: boolean;
     calendar_id?: string | null;
@@ -130,6 +155,34 @@ export type SchedulingRequestCreatePayload = {
   metadata?: Record<string, unknown>;
 };
 
+export type SchedulingRequestUpdatePayload = Omit<
+  SchedulingRequestCreatePayload,
+  "timezone" | "status" | "slots" | "participants"
+> & {
+  slots?: SchedulingCandidateSlotReconcilePayload[];
+  participants?: SchedulingParticipantReconcilePayload[];
+};
+
+export type SchedulingCandidateSlotReconcilePayload = SchedulingCandidateSlotPayload & {
+  id?: string;
+  revision?: string;
+};
+
+export type SchedulingParticipantReconcilePayload = SchedulingParticipantPayload & {
+  id?: string;
+  revision?: string;
+};
+
+export type SchedulingCandidateSlotUpdatePayload = {
+  label?: string | null;
+  description?: string | null;
+  start_at?: string | null;
+  end_at?: string | null;
+  timezone?: string | null;
+  location?: string | null;
+  metadata?: Record<string, unknown> | null;
+};
+
 export type SchedulingDecisionPayload = {
   slot_id?: string | null;
   poll_option_id?: string | null;
@@ -144,6 +197,7 @@ export type SchedulingAvailabilityPayload = {
     value: SchedulingAvailabilityValue;
     option_revision: string;
   }>;
+  comment?: string | null;
 };
 
 export type SchedulingAvailabilityResponse = {
@@ -151,12 +205,65 @@ export type SchedulingAvailabilityResponse = {
   participant_id: string;
   has_response: boolean;
   submitted_at?: string | null;
+  comment?: string | null;
   answers: Array<{
     slot_id: string;
     value: SchedulingAvailabilityValue;
   }>;
 };
 
+export type SchedulingPublicCandidateSlot = {
+  id: string;
+  label: string;
+  description?: string | null;
+  start_at: string;
+  end_at: string;
+  timezone: string;
+  location?: string | null;
+  position: number;
+  revision: string;
+};
+
+export type SchedulingPublicParticipationResponse = {
+  request_id: string;
+  title: string;
+  description?: string | null;
+  location?: string | null;
+  timezone: string;
+  status: SchedulingStatus;
+  deadline_at?: string | null;
+  cancelled_at?: string | null;
+  cancellation_notice_until?: string | null;
+  cancellation_notice_only: boolean;
+  participant_email_required: boolean;
+  anonymous_password_required: boolean;
+  single_choice: boolean;
+  max_participants_per_option: number | null;
+  allow_maybe: boolean;
+  allow_comments: boolean;
+  allow_participant_updates: boolean;
+  has_response: boolean;
+  submitted_at?: string | null;
+  answers: Array<{
+    slot_id: string;
+    value: SchedulingAvailabilityValue;
+  }>;
+  comment?: string | null;
+  replayed: boolean;
+  slots: SchedulingPublicCandidateSlot[];
+};
+
+export type SchedulingPublicParticipationAccessPayload = {
+  participant_email?: string | null;
+  password?: string | null;
+};
+
+export type SchedulingPublicParticipationSubmitPayload = SchedulingPublicParticipationAccessPayload & {
+  answers: SchedulingAvailabilityPayload["answers"];
+  comment?: string | null;
+  idempotency_key?: string;
+};
+
 export type SchedulingCalendarActionResponse = {
   request: SchedulingRequest;
   created_event_ids: string[];
@@ -182,6 +289,18 @@ export type SchedulingNotification = {
 
 export type SchedulingNotificationListResponse = { notifications: SchedulingNotification[] };
 
+export type SchedulingInvitationAction = "copy" | "send" | "revoke";
+
+export type SchedulingInvitationActionResponse = {
+  participant_id: string;
+  action: SchedulingInvitationAction;
+  status: string;
+  action_url?: string | null;
+  issued_at?: string | null;
+  replayed: boolean;
+  notification?: SchedulingNotification | null;
+};
+
 export type SchedulingPollOptionResult = {
   option_id: string;
   option_key: string;
@@ -203,31 +322,25 @@ export type SchedulingSummaryResponse = {
   };
 };
 
-export type SchedulingAddressLookupCandidate = {
-  contact_id: string;
-  address_book_id: string;
-  display_name: string;
-  email?: string | null;
-  email_label?: string | null;
-  organization?: string | null;
-  role_title?: string | null;
-  tags: string[];
-  source_kind: string;
-  source_ref?: string | null;
-  source_revision?: string | null;
-  provenance: Record<string, unknown>;
-};
-
-export type SchedulingAddressLookupResponse = {
-  available: boolean;
-  candidates: SchedulingAddressLookupCandidate[];
+export type SchedulingPeopleSearchResponse = {
+  groups: PeoplePickerSearchGroup[];
 };
 
 const json = (payload: unknown) => ({ method: "POST", body: JSON.stringify(payload ?? {}) });
 
-export function lookupSchedulingAddresses(settings: ApiSettings, query: string, limit = 25): Promise<SchedulingAddressLookupResponse> {
+export async function searchSchedulingPeople(
+  settings: ApiSettings,
+  query: string,
+  limit = 25,
+  signal?: AbortSignal
+): Promise<PeoplePickerSearchGroup[]> {
   const params = new URLSearchParams({ query, limit: String(limit) });
-  return apiFetch<SchedulingAddressLookupResponse>(settings, `/api/v1/scheduling/address-lookup?${params.toString()}`);
+  const response = await apiFetch<SchedulingPeopleSearchResponse>(
+    settings,
+    `/api/v1/scheduling/people?${params.toString()}`,
+    { signal }
+  );
+  return response.groups;
 }
 
 export function listSchedulingRequests(settings: ApiSettings, status?: string): Promise<SchedulingRequestListResponse> {
@@ -239,6 +352,29 @@ export function createSchedulingRequest(settings: ApiSettings, payload: Scheduli
   return apiFetch<SchedulingRequest>(settings, "/api/v1/scheduling/requests", json(payload));
 }
 
+export function updateSchedulingRequest(
+  settings: ApiSettings,
+  requestId: string,
+  payload: SchedulingRequestUpdatePayload
+): Promise<SchedulingRequest> {
+  return apiFetch<SchedulingRequest>(settings, `/api/v1/scheduling/requests/${requestId}`, {
+    method: "PATCH",
+    body: JSON.stringify(payload)
+  });
+}
+
+export function updateSchedulingCandidateSlot(
+  settings: ApiSettings,
+  requestId: string,
+  slotId: string,
+  payload: SchedulingCandidateSlotUpdatePayload
+): Promise<SchedulingRequest> {
+  return apiFetch<SchedulingRequest>(settings, `/api/v1/scheduling/requests/${requestId}/slots/${slotId}`, {
+    method: "PATCH",
+    body: JSON.stringify(payload)
+  });
+}
+
 export function submitSchedulingAvailability(
   settings: ApiSettings,
   requestId: string,
@@ -261,6 +397,32 @@ export function getSchedulingAvailabilityResponse(
   );
 }
 
+export function getPublicSchedulingParticipation(
+  settings: ApiSettings,
+  requestId: string,
+  token: string,
+  payload: SchedulingPublicParticipationAccessPayload
+): Promise<SchedulingPublicParticipationResponse> {
+  return apiFetch<SchedulingPublicParticipationResponse>(
+    settings,
+    `/api/v1/scheduling/public/${encodeURIComponent(requestId)}/${encodeURIComponent(token)}`,
+    json(payload)
+  );
+}
+
+export function submitPublicSchedulingParticipation(
+  settings: ApiSettings,
+  requestId: string,
+  token: string,
+  payload: SchedulingPublicParticipationSubmitPayload
+): Promise<SchedulingPublicParticipationResponse> {
+  return apiFetch<SchedulingPublicParticipationResponse>(
+    settings,
+    `/api/v1/scheduling/public/${encodeURIComponent(requestId)}/${encodeURIComponent(token)}/responses`,
+    json(payload)
+  );
+}
+
 export function openSchedulingRequest(settings: ApiSettings, requestId: string): Promise<SchedulingStatusResponse> {
   return apiFetch<SchedulingStatusResponse>(settings, `/api/v1/scheduling/requests/${requestId}/open`, json({}));
 }
@@ -297,3 +459,30 @@ export function listSchedulingNotifications(settings: ApiSettings, requestId?: s
   const query = requestId ? `?request_id=${encodeURIComponent(requestId)}` : "";
   return apiFetch<SchedulingNotificationListResponse>(settings, `/api/v1/scheduling/notifications${query}`);
 }
+
+export function issueSchedulingParticipantInvitation(
+  settings: ApiSettings,
+  requestId: string,
+  participantId: string,
+  participantRevision: string,
+  action: Exclude<SchedulingInvitationAction, "revoke">
+): Promise<SchedulingInvitationActionResponse> {
+  return apiFetch<SchedulingInvitationActionResponse>(
+    settings,
+    `/api/v1/scheduling/requests/${encodeURIComponent(requestId)}/participants/${encodeURIComponent(participantId)}/invitation`,
+    json({ action, participant_revision: participantRevision })
+  );
+}
+
+export function revokeSchedulingParticipantInvitation(
+  settings: ApiSettings,
+  requestId: string,
+  participantId: string,
+  participantRevision: string
+): Promise<SchedulingInvitationActionResponse> {
+  return apiFetch<SchedulingInvitationActionResponse>(
+    settings,
+    `/api/v1/scheduling/requests/${encodeURIComponent(requestId)}/participants/${encodeURIComponent(participantId)}/invitation`,
+    { method: "DELETE", body: JSON.stringify({ participant_revision: participantRevision }) }
+  );
+}

webui/src/features/scheduling/SchedulingPublicPage.tsx

@@ -0,0 +1,275 @@
+import { useEffect, useMemo, useState, type FormEvent } from "react";
+import { Link, useParams } from "react-router-dom";
+import {
+  Button,
+  Card,
+  DismissibleAlert,
+  FormField,
+  LoadingFrame,
+  formatDateTime,
+  type ApiSettings,
+  type AuthInfo
+} from "@govoplan/core-webui";
+import {
+  getPublicSchedulingParticipation,
+  submitPublicSchedulingParticipation,
+  type SchedulingAvailabilityValue,
+  type SchedulingPublicParticipationAccessPayload,
+  type SchedulingPublicParticipationResponse
+} from "../../api/scheduling";
+import { applySchedulingAvailabilityChoice } from "./schedulingViewModel";
+
+type SchedulingPublicPageProps = {
+  settings: ApiSettings;
+  auth: AuthInfo | null;
+};
+
+const I18N = {
+  accessDetails: "i18n:govoplan-scheduling.access_details.79c06b89",
+  accessHelp: "i18n:govoplan-scheduling.enter_the_details_supplied_with_the_invitation_for_privacy.81ba419c",
+  accessRequest: "i18n:govoplan-scheduling.open_scheduling_request.31829cce",
+  alreadySubmitted: "i18n:govoplan-scheduling.responses_may_be_updated_while_this_request_remains_open.4faecbbe",
+  answerRequired: "i18n:govoplan-scheduling.choose_availability_for_at_least_one_candidate_slot.28d2111f",
+  available: "i18n:govoplan-scheduling.available.7c62a142",
+  backToScheduling: "i18n:govoplan-scheduling.open_in_scheduling.48df1541",
+  comment: "i18n:govoplan-scheduling.comment.d03495b1",
+  cancelled: "i18n:govoplan-scheduling.this_scheduling_request_was_cancelled.1af3c85e",
+  cancellationNoticeUntil: "i18n:govoplan-scheduling.cancellation_notice_available_until.f840d1e6",
+  deadline: "i18n:govoplan-scheduling.response_deadline.7fd9e3aa",
+  email: "i18n:govoplan-scheduling.participant_email.2cadfd9e",
+  invalidAccess: "i18n:govoplan-scheduling.this_scheduling_link_is_invalid_expired_or_the_access_details.8e7aa197",
+  loading: "i18n:govoplan-scheduling.loading_scheduling_request.43c39c1b",
+  maybe: "i18n:govoplan-scheduling.maybe.56dd8d0b",
+  noLongerOpen: "i18n:govoplan-scheduling.this_scheduling_request_is_no_longer_accepting_responses.c612e78a",
+  password: "i18n:govoplan-scheduling.guest_password.94545e82",
+  response: "i18n:govoplan-scheduling.your_availability.f86c8215",
+  saved: "i18n:govoplan-scheduling.your_response_has_been_recorded.b855088d",
+  submit: "i18n:govoplan-scheduling.submit_response.a5f0c053",
+  unavailable: "i18n:govoplan-scheduling.unavailable.2c9c1f79"
+} as const;
+
+function accessPayload(email: string, password: string): SchedulingPublicParticipationAccessPayload {
+  return {
+    participant_email: email.trim() || null,
+    password: password || null
+  };
+}
+
+function initialAvailability(response: SchedulingPublicParticipationResponse): Record<string, SchedulingAvailabilityValue | ""> {
+  const previous = new Map(response.answers.map((answer) => [answer.slot_id, answer.value]));
+  return Object.fromEntries(response.slots.map((slot) => [slot.id, previous.get(slot.id) ?? ""]));
+}
+
+function newIdempotencyKey(): string {
+  if (typeof crypto !== "undefined" && "randomUUID" in crypto) return crypto.randomUUID();
+  return `scheduling-response-${Date.now()}-${Math.random().toString(16).slice(2)}`;
+}
+
+export default function SchedulingPublicPage({ settings, auth }: SchedulingPublicPageProps) {
+  const { requestId = "", token = "" } = useParams();
+  const [response, setResponse] = useState<SchedulingPublicParticipationResponse | null>(null);
+  const [email, setEmail] = useState("");
+  const [password, setPassword] = useState("");
+  const [availability, setAvailability] = useState<Record<string, SchedulingAvailabilityValue | "">>({});
+  const [comment, setComment] = useState("");
+  const [loading, setLoading] = useState(true);
+  const [saving, setSaving] = useState(false);
+  const [accessAttempted, setAccessAttempted] = useState(false);
+  const [error, setError] = useState("");
+  const [success, setSuccess] = useState("");
+
+  const slotIds = useMemo(() => response?.slots.map((slot) => slot.id) ?? [], [response]);
+  const collecting = response?.status === "collecting";
+
+  function applyResponse(next: SchedulingPublicParticipationResponse) {
+    setResponse(next);
+    setAvailability(initialAvailability(next));
+    setComment(next.comment ?? "");
+    setError("");
+  }
+
+  useEffect(() => {
+    let cancelled = false;
+    setLoading(true);
+    setResponse(null);
+    setAccessAttempted(false);
+    setError("");
+    void getPublicSchedulingParticipation(settings, requestId, token, {})
+      .then((next) => {
+        if (!cancelled) applyResponse(next);
+      })
+      .catch(() => undefined)
+      .finally(() => {
+        if (!cancelled) setLoading(false);
+      });
+    return () => {
+      cancelled = true;
+    };
+  }, [requestId, settings.apiBaseUrl, settings.apiKey, token]);
+
+  async function openRequest(event: FormEvent) {
+    event.preventDefault();
+    setLoading(true);
+    setAccessAttempted(true);
+    setError("");
+    try {
+      applyResponse(await getPublicSchedulingParticipation(settings, requestId, token, accessPayload(email, password)));
+    } catch {
+      setResponse(null);
+      setError(I18N.invalidAccess);
+    } finally {
+      setLoading(false);
+    }
+  }
+
+  async function saveResponse(event: FormEvent) {
+    event.preventDefault();
+    if (!response) return;
+    if (!response.slots.some((slot) => availability[slot.id])) {
+      setError(I18N.answerRequired);
+      return;
+    }
+    setSaving(true);
+    setError("");
+    setSuccess("");
+    try {
+      const next = await submitPublicSchedulingParticipation(settings, requestId, token, {
+        ...accessPayload(email, password),
+        answers: response.slots
+          .filter((slot) => availability[slot.id])
+          .map((slot) => ({
+            slot_id: slot.id,
+            value: availability[slot.id] as SchedulingAvailabilityValue,
+            option_revision: slot.revision
+          })),
+        comment: response.allow_comments ? comment : null,
+        idempotency_key: newIdempotencyKey()
+      });
+      applyResponse(next);
+      setSuccess(I18N.saved);
+    } catch {
+      setError(I18N.invalidAccess);
+    } finally {
+      setSaving(false);
+    }
+  }
+
+  return (
+    <main className="scheduling-public-page">
+      <LoadingFrame loading={loading} label={I18N.loading}>
+        {auth && (
+          <div className="scheduling-public-deep-link">
+            <Link className="btn btn-secondary" to={`/scheduling?request_id=${encodeURIComponent(requestId)}`}>
+              {I18N.backToScheduling}
+            </Link>
+          </div>
+        )}
+
+        {!response && !loading && (
+          <Card title={I18N.accessDetails}>
+            <form className="scheduling-public-access-form" onSubmit={openRequest}>
+              <p className="muted">{I18N.accessHelp}</p>
+              {accessAttempted && error && <DismissibleAlert tone="danger">{error}</DismissibleAlert>}
+              <div className="form-grid two-col">
+                <FormField label={I18N.email}>
+                  <input
+                    type="email"
+                    autoComplete="email"
+                    value={email}
+                    onChange={(event) => setEmail(event.target.value)}
+                  />
+                </FormField>
+                <FormField label={I18N.password}>
+                  <input
+                    type="password"
+                    autoComplete="current-password"
+                    value={password}
+                    onChange={(event) => setPassword(event.target.value)}
+                  />
+                </FormField>
+              </div>
+              <div className="scheduling-public-actions">
+                <Button type="submit" variant="primary">{I18N.accessRequest}</Button>
+              </div>
+            </form>
+          </Card>
+        )}
+
+        {response && (
+          <form className="scheduling-public-content" onSubmit={saveResponse}>
+            <Card title={response.title}>
+              {response.description && <p className="scheduling-public-description">{response.description}</p>}
+              <dl className="scheduling-public-summary">
+                {response.location && <><dt>i18n:govoplan-scheduling.location.d219c681</dt><dd>{response.location}</dd></>}
+                {response.deadline_at && <><dt>{I18N.deadline}</dt><dd>{formatDateTime(response.deadline_at)}</dd></>}
+              </dl>
+              {response.cancellation_notice_only
+                ? <DismissibleAlert tone="warning" dismissible={false}>{I18N.cancelled}</DismissibleAlert>
+                : !collecting && <DismissibleAlert tone="info" dismissible={false}>{I18N.noLongerOpen}</DismissibleAlert>}
+              {response.has_response && collecting && <DismissibleAlert tone="info" dismissible={false}>{I18N.alreadySubmitted}</DismissibleAlert>}
+              {response.cancellation_notice_only && response.cancellation_notice_until && (
+                <p className="muted">{I18N.cancellationNoticeUntil}: {formatDateTime(response.cancellation_notice_until)}</p>
+              )}
+            </Card>
+
+            {error && <DismissibleAlert tone="danger">{error}</DismissibleAlert>}
+            {success && <DismissibleAlert tone="success">{success}</DismissibleAlert>}
+
+            {!response.cancellation_notice_only && <Card title={I18N.response}>
+              <div className="scheduling-public-slots">
+                {response.slots.map((slot) => (
+                  <fieldset className="scheduling-public-slot" key={slot.id} disabled={!collecting || saving}>
+                    <legend>{slot.label}</legend>
+                    <p>{formatDateTime(slot.start_at)} – {formatDateTime(slot.end_at)}</p>
+                    {slot.description && <p className="muted">{slot.description}</p>}
+                    {(slot.location || response.location) && <p className="muted">{slot.location || response.location}</p>}
+                    <div className="scheduling-public-choice-group">
+                      {([
+                        ["available", I18N.available],
+                        ...(response.allow_maybe ? [["maybe", I18N.maybe] as const] : []),
+                        ["unavailable", I18N.unavailable]
+                      ] as Array<[SchedulingAvailabilityValue, string]>).map(([value, label]) => (
+                        <label key={value}>
+                          <input
+                            type="radio"
+                            name={`slot-${slot.id}`}
+                            value={value}
+                            checked={availability[slot.id] === value}
+                            onChange={() => setAvailability((current) => applySchedulingAvailabilityChoice(
+                              slotIds,
+                              current,
+                              slot.id,
+                              value,
+                              response.single_choice
+                            ))}
+                          />
+                          <span>{label}</span>
+                        </label>
+                      ))}
+                    </div>
+                  </fieldset>
+                ))}
+              </div>
+              {response.allow_comments && (
+                <FormField label={I18N.comment}>
+                  <textarea
+                    rows={4}
+                    maxLength={4000}
+                    disabled={!collecting || saving}
+                    value={comment}
+                    onChange={(event) => setComment(event.target.value)}
+                  />
+                </FormField>
+              )}
+              {collecting && (
+                <div className="scheduling-public-actions">
+                  <Button type="submit" variant="primary" disabled={saving}>{I18N.submit}</Button>
+                </div>
+              )}
+            </Card>}
+          </form>
+        )}
+      </LoadingFrame>
+    </main>
+  );
+}

webui/src/features/scheduling/SchedulingRequestsWidget.tsx

@@ -0,0 +1,120 @@
+import { useCallback } from "react";
+import { CalendarClock } from "lucide-react";
+import { Link } from "react-router-dom";
+import {
+  DashboardWidgetList,
+  DismissibleAlert,
+  LoadingFrame,
+  StatusBadge,
+  useDashboardWidgetData,
+  type ApiSettings,
+  type DashboardWidgetConfiguration
+} from "@govoplan/core-webui";
+import {
+  listSchedulingRequests,
+  type SchedulingRequest
+} from "../../api/scheduling";
+
+export default function SchedulingRequestsWidget({
+  settings,
+  refreshKey,
+  configuration
+}: {
+  settings: ApiSettings;
+  refreshKey: number;
+  configuration: DashboardWidgetConfiguration;
+}) {
+  const maxItems = numberSetting(configuration.maxItems, 5, 1, 12);
+  const includeDrafts = configuration.includeDrafts === true;
+  const load = useCallback(async () => {
+    const response = await listSchedulingRequests(settings);
+    return response.requests
+      .filter(
+        (request) =>
+          request.status === "collecting"
+          || (includeDrafts && request.status === "draft")
+      )
+      .sort(compareRequests)
+      .slice(0, maxItems);
+  }, [includeDrafts, maxItems, settings]);
+  const { data: requests, loading, error } = useDashboardWidgetData(
+    load,
+    refreshKey
+  );
+
+  return (
+    <LoadingFrame loading={loading} label="Loading scheduling requests">
+      {error && (
+        <DismissibleAlert tone="warning" resetKey={error}>
+          {error}
+        </DismissibleAlert>
+      )}
+      <DashboardWidgetList
+        emptyText="No scheduling requests are awaiting responses."
+        items={(requests ?? []).map((request) => ({
+          id: request.id,
+          title: request.title,
+          detail: responseLabel(request),
+          meta: deadlineLabel(request),
+          leading: <CalendarClock size={17} aria-hidden="true" />,
+          trailing: (
+            <StatusBadge
+              status={request.status}
+              label={request.status === "collecting" ? "Open" : "Draft"}
+            />
+          ),
+          to: "/scheduling"
+        }))}
+      />
+      <div className="dashboard-contribution-footer">
+        <Link className="btn btn-secondary" to="/scheduling">
+          Open scheduling
+        </Link>
+      </div>
+    </LoadingFrame>
+  );
+}
+
+function compareRequests(
+  left: SchedulingRequest,
+  right: SchedulingRequest
+): number {
+  if (left.status !== right.status) {
+    return left.status === "collecting" ? -1 : 1;
+  }
+  const leftDeadline = left.deadline_at
+    ? new Date(left.deadline_at).getTime()
+    : Number.POSITIVE_INFINITY;
+  const rightDeadline = right.deadline_at
+    ? new Date(right.deadline_at).getTime()
+    : Number.POSITIVE_INFINITY;
+  return (
+    leftDeadline - rightDeadline
+    || new Date(right.updated_at).getTime() - new Date(left.updated_at).getTime()
+  );
+}
+
+function responseLabel(request: SchedulingRequest): string {
+  const responded = request.participant_aggregate.status_counts.responded ?? 0;
+  return `${responded} of ${request.participant_aggregate.total} responded`;
+}
+
+function deadlineLabel(request: SchedulingRequest): string {
+  if (!request.deadline_at) return `${request.slots.length} options`;
+  return `Due ${new Intl.DateTimeFormat(undefined, {
+    day: "2-digit",
+    month: "short"
+  }).format(new Date(request.deadline_at))}`;
+}
+
+function numberSetting(
+  value: unknown,
+  fallback: number,
+  minimum: number,
+  maximum: number
+): number {
+  const numeric = typeof value === "number" ? value : Number(value);
+  return Number.isFinite(numeric)
+    ? Math.max(minimum, Math.min(maximum, Math.floor(numeric)))
+    : fallback;
+}

webui/src/features/scheduling/schedulingViewModel.ts

@@ -1,4 +1,25 @@
-import type { SchedulingParticipant, SchedulingRequest } from "../../api/scheduling";
+import type {
+  SchedulingAvailabilityValue,
+  SchedulingParticipant,
+  SchedulingParticipantPayload,
+  SchedulingRequest
+} from "../../api/scheduling";
+import type { PeoplePickerItem } from "@govoplan/core-webui";
+
+const DIRECTORY_SELECTION_METADATA_KEY = "directory_selection";
+
+export type SchedulingParticipantDraft = PeoplePickerItem & {
+  draftId: string;
+  sourceId?: string;
+  revision?: string;
+  respondent_id?: string | null;
+  display_name: string;
+  email: string;
+  participant_type: "internal" | "external" | "resource";
+  required: boolean;
+  metadata?: Record<string, unknown>;
+  identityLocked?: boolean;
+};
 
 export type SchedulingActor = {
   accountId?: string | null;
@@ -21,6 +42,123 @@ export type SchedulingSortPhase =
   | "determined"
   | "past";
 
+export type SchedulingInvitationActionBlock =
+  | "participation_policy_unavailable"
+  | "cancellation_notice_expired"
+  | "delivery_unavailable"
+  | "no_delivery_target"
+  | "no_active_invitation"
+  | "participant_revision_unavailable";
+
+export type SchedulingInvitationActionBlocks = {
+  copy: SchedulingInvitationActionBlock | null;
+  send: SchedulingInvitationActionBlock | null;
+  revoke: SchedulingInvitationActionBlock | null;
+};
+
+type DirectorySelection = {
+  selection_key?: string;
+  kind?: PeoplePickerItem["kind"];
+  reference_id?: string | null;
+  source_module?: string | null;
+  source_label?: string | null;
+  source_revision?: string | null;
+};
+
+function directorySelection(metadata?: Record<string, unknown>): DirectorySelection | null {
+  const value = metadata?.[DIRECTORY_SELECTION_METADATA_KEY];
+  if (!value || typeof value !== "object" || Array.isArray(value)) return null;
+  return value as DirectorySelection;
+}
+
+function normalizedParticipantType(value: string | null): SchedulingParticipantDraft["participant_type"] {
+  return value === "internal" || value === "resource" ? value : "external";
+}
+
+function selectionMetadata(item: PeoplePickerItem): Record<string, unknown> {
+  if (item.kind === "external") return {};
+  return {
+    [DIRECTORY_SELECTION_METADATA_KEY]: {
+      selection_key: item.selection_key,
+      kind: item.kind,
+      reference_id: item.reference_id ?? null,
+      source_module: item.source_module ?? null,
+      source_label: item.source_label ?? null,
+      source_revision: item.source_revision ?? null
+    }
+  };
+}
+
+export function participantDraftFromResponse(
+  participant: SchedulingParticipant,
+  draftId: string
+): SchedulingParticipantDraft {
+  const selection = directorySelection(participant.metadata);
+  const kind = selection?.kind ?? (participant.respondent_id ? "account" : "external");
+  const referenceId = selection?.reference_id
+    ?? (kind === "account" ? participant.respondent_id : null);
+  const email = participant.email?.trim().toLowerCase() || null;
+  return {
+    selection_key: selection?.selection_key
+      ?? (email ? `${kind}:${email}` : `${kind}:participant:${participant.id}`),
+    kind,
+    reference_id: referenceId,
+    display_name: participant.display_name?.trim() || email || "—",
+    email: email ?? "",
+    source_module: selection?.source_module ?? null,
+    source_label: selection?.source_label ?? null,
+    source_revision: selection?.source_revision ?? null,
+    draftId,
+    sourceId: participant.id,
+    revision: participant.revision ?? undefined,
+    respondent_id: participant.respondent_id,
+    participant_type: normalizedParticipantType(participant.participant_type),
+    required: participant.required ?? true,
+    metadata: participant.metadata ?? {},
+    identityLocked: Boolean(participant.poll_invitation_id)
+  };
+}
+
+export function participantDraftsFromPicker(
+  selected: PeoplePickerItem[],
+  current: SchedulingParticipantDraft[],
+  nextDraftId: () => string
+): SchedulingParticipantDraft[] {
+  const currentByKey = new Map(current.map((participant) => [participant.selection_key, participant]));
+  return selected.map((item) => {
+    const existing = currentByKey.get(item.selection_key);
+    if (existing) return existing;
+    const kind = item.kind === "account" ? "account" : item.kind === "contact" ? "contact" : "external";
+    return {
+      ...item,
+      kind,
+      email: item.email?.trim().toLowerCase() || "",
+      draftId: nextDraftId(),
+      respondent_id: kind === "account" ? item.reference_id ?? null : null,
+      participant_type: kind === "account" ? "internal" : "external",
+      required: true,
+      metadata: selectionMetadata(item),
+      identityLocked: false
+    };
+  });
+}
+
+export function participantPayload(
+  participant: SchedulingParticipantDraft
+): SchedulingParticipantPayload & { id?: string; revision?: string } {
+  return {
+    ...(participant.sourceId
+      ? { id: participant.sourceId, revision: participant.revision }
+      : {}),
+    respondent_id: participant.respondent_id ?? null,
+    display_name: participant.display_name.trim() || null,
+    email: participant.email.trim() || null,
+    participant_type: participant.participant_type,
+    required: participant.required,
+    metadata: participant.metadata ?? {}
+  };
+}
+
 export function schedulingActorIds(actor: SchedulingActor): string[] {
   return Array.from(new Set([
     actor.accountId,
@@ -28,20 +166,27 @@ export function schedulingActorIds(actor: SchedulingActor): string[] {
     actor.membershipId,
     actor.identityId,
     actor.email
-  ].filter((value): value is string => Boolean(value))));
+  ].filter((value): value is string => Boolean(value)).flatMap((value) =>
+    value.includes("@") ? [value, value.trim().toLowerCase()] : [value]
+  )));
 }
 
 export function schedulingParticipantForActor(
   request: SchedulingRequest,
   actor: SchedulingActor
 ): SchedulingParticipant | null {
+  const projected = request.participants.find(
+    (participant) => participant.is_current_participant
+  );
+  if (projected) return projected;
   const ids = new Set(schedulingActorIds(actor));
-  return request.participants.find((participant) =>
-    Boolean(
+  return request.participants.find((participant) => {
+    const email = participant.email?.trim().toLowerCase();
+    return Boolean(
       (participant.respondent_id && ids.has(participant.respondent_id)) ||
-      (participant.email && ids.has(participant.email))
-    )
-  ) ?? null;
+      (email && ids.has(email))
+    );
+  }) ?? null;
 }
 
 export function schedulingRequestIsOwned(
@@ -137,6 +282,85 @@ export function schedulingRequestIsPast(
   return slotEnds.every((value) => Number.isFinite(value) && value < now.getTime());
 }
 
+export function schedulingInvitationActionBlocks(
+  request: SchedulingRequest,
+  participant: SchedulingParticipant,
+  now = new Date()
+): SchedulingInvitationActionBlocks {
+  if (!participant.revision) {
+    return {
+      copy: "participant_revision_unavailable",
+      send: "participant_revision_unavailable",
+      revoke: "participant_revision_unavailable"
+    };
+  }
+  const policyAvailable = Boolean(
+    request.poll_id &&
+    request.public_participation_policy_enforcement_available === true
+  );
+  let issueBlock: SchedulingInvitationActionBlock | null = policyAvailable
+    ? null
+    : "participation_policy_unavailable";
+  if (!issueBlock && request.status === "cancelled") {
+    const noticeUntil = request.cancellation_notice_until
+      ? Date.parse(request.cancellation_notice_until)
+      : Number.NaN;
+    if (!Number.isFinite(noticeUntil) || noticeUntil <= now.getTime()) {
+      issueBlock = "cancellation_notice_expired";
+    }
+  }
+
+  const respondentId = participant.respondent_id?.trim() ?? "";
+  const hasDeliveryTarget = Boolean(
+    participant.email?.trim() ||
+    (respondentId && !respondentId.startsWith("scheduling-participant:"))
+  );
+  const sendBlock = issueBlock
+    ?? (request.participant_invitation_delivery_available === true
+      ? null
+      : "delivery_unavailable")
+    ?? (hasDeliveryTarget ? null : "no_delivery_target");
+  const revokeBlock = participant.poll_invitation_id
+    ? (policyAvailable ? null : "participation_policy_unavailable")
+    : "no_active_invitation";
+
+  return { copy: issueBlock, send: sendBlock, revoke: revokeBlock };
+}
+
+export function schedulingPublicInvitationUrl(
+  actionUrl: string,
+  applicationOrigin: string
+): string | null {
+  try {
+    const origin = new URL(applicationOrigin);
+    const url = new URL(actionUrl, origin);
+    if (url.origin !== origin.origin || !url.pathname.startsWith("/scheduling/public/")) return null;
+    return url.toString();
+  } catch {
+    return null;
+  }
+}
+
+export function applySchedulingAvailabilityChoice(
+  slotIds: string[],
+  current: Record<string, SchedulingAvailabilityValue | "">,
+  slotId: string,
+  value: SchedulingAvailabilityValue | "",
+  singleChoice: boolean
+): Record<string, SchedulingAvailabilityValue | ""> {
+  if (!singleChoice || !["available", "maybe"].includes(value)) {
+    return { ...current, [slotId]: value };
+  }
+  return Object.fromEntries(slotIds.map((candidateId) => [
+    candidateId,
+    candidateId === slotId
+      ? value
+      : current[candidateId] && current[candidateId] !== "unavailable"
+        ? "unavailable"
+        : current[candidateId] ?? ""
+  ]));
+}
+
 const SORT_PHASE_ORDER: Record<SchedulingSortPhase, number> = {
   unanswered: 0,
   answered: 1,

webui/src/i18n/generatedTranslations.ts

@@ -1,5 +1,70 @@
 export const generatedTranslations = {
   en: {
+    "i18n:govoplan-scheduling.access_details.79c06b89": "Access details",
+    "i18n:govoplan-scheduling.automatic_invitation_delivery_is_unavailable_copy_the_link_instead.4e39d0b3": "Automatic invitation delivery is unavailable; copy the link instead.",
+    "i18n:govoplan-scheduling.cancellation_notice_available_until.f840d1e6": "Cancellation notice available until",
+    "i18n:govoplan-scheduling.copy_a_fresh_invitation_link_for_value0.e3799c79": "Copy a fresh invitation link for {value0}",
+    "i18n:govoplan-scheduling.enter_the_details_supplied_with_the_invitation_for_privacy.81ba419c": "Enter the details supplied with the invitation. For privacy, invalid and expired links use the same response.",
+    "i18n:govoplan-scheduling.loading_scheduling_request.43c39c1b": "Loading scheduling request…",
+    "i18n:govoplan-scheduling.invitation_delivery_failed_the_link_was_created_but_was_not_delivered.8db0c306": "Invitation delivery failed. The link was created but was not delivered.",
+    "i18n:govoplan-scheduling.invitation_delivery_requested.1aaa78ba": "Invitation delivery requested.",
+    "i18n:govoplan-scheduling.invitation_link_copied.332973ec": "Invitation link copied.",
+    "i18n:govoplan-scheduling.invitation_link_revoked.c7dd20d4": "Invitation link revoked.",
+    "i18n:govoplan-scheduling.no_active_invitation_link_to_revoke.4ad0f0cc": "No active invitation link to revoke.",
+    "i18n:govoplan-scheduling.open_in_scheduling.48df1541": "Open in Scheduling",
+    "i18n:govoplan-scheduling.open_scheduling_request.31829cce": "Open scheduling request",
+    "i18n:govoplan-scheduling.response_deadline.7fd9e3aa": "Response deadline",
+    "i18n:govoplan-scheduling.reload_the_request_before_changing_this_invitation.9e685df4": "Reload the request before changing this invitation.",
+    "i18n:govoplan-scheduling.participant.554f4235": "Participant",
+    "i18n:govoplan-scheduling.revoke_invitation_link.87bf89cf": "Revoke invitation link",
+    "i18n:govoplan-scheduling.revoke_link.da371ee1": "Revoke link",
+    "i18n:govoplan-scheduling.revoke_the_current_invitation_link_for_value0_it_will_stop_working_immediately.3cdc5817": "Revoke the current invitation link for {value0}? It will stop working immediately.",
+    "i18n:govoplan-scheduling.revoke_the_invitation_link_for_value0.15a9c9fa": "Revoke the invitation link for {value0}",
+    "i18n:govoplan-scheduling.send_a_fresh_invitation_to_value0.fd8d9dea": "Send a fresh invitation to {value0}",
+    "i18n:govoplan-scheduling.the_cancellation_notice_has_expired_a_new_link_cannot_be_issued.9c6ccc7c": "The cancellation notice has expired; a new link cannot be issued.",
+    "i18n:govoplan-scheduling.the_invitation_link_could_not_be_copied_check_browser_clipboard_permissions_and_try_again.a8b17cbc": "The invitation link could not be copied. Check browser clipboard permissions and try again.",
+    "i18n:govoplan-scheduling.this_participant_has_no_deliverable_email_address_or_account.dbe14180": "This participant has no deliverable email address or account.",
+    "i18n:govoplan-scheduling.this_invitation_changed_the_request_was_reloaded_try_again.c7095533": "This invitation changed. The request was reloaded; try again.",
+    "i18n:govoplan-scheduling.this_scheduling_link_is_invalid_expired_or_the_access_details.8e7aa197": "This scheduling link is invalid, expired, or the access details do not match.",
+    "i18n:govoplan-scheduling.this_scheduling_request_was_cancelled.1af3c85e": "This scheduling request was cancelled.",
+    "i18n:govoplan-scheduling.this_scheduling_request_is_no_longer_accepting_responses.c612e78a": "This scheduling request is no longer accepting responses.",
+    "i18n:govoplan-scheduling.your_availability.f86c8215": "Your availability",
+    "i18n:govoplan-scheduling.save_or_discard_your_unsent_availability_changes_before_leaving.97e10df1": "Save or discard your unsent availability changes before leaving.",
+    "i18n:govoplan-scheduling.a_slot_can_be_selected_after_the_request_is_closed.f91ec02d": "A slot can be selected after the request is closed.",
+    "i18n:govoplan-scheduling.add_maybe_between_yes_and_no_for_each_candidate_slot.74dc9db6": "Add Maybe between Available and Unavailable for each candidate slot.",
+    "i18n:govoplan-scheduling.allow_comments.d63202a6": "Allow comments",
+    "i18n:govoplan-scheduling.allow_external_participants.a9efcb52": "Allow external participants",
+    "i18n:govoplan-scheduling.awaiting.42aa82e0": "Awaiting",
+    "i18n:govoplan-scheduling.capacity.d3c375f8": "Capacity",
+    "i18n:govoplan-scheduling.comment.d03495b1": "Comment",
+    "i18n:govoplan-scheduling.create_an_organizer_notification_whenever_a_response_is.253ddca8": "Create an organizer notification whenever a response is submitted or updated.",
+    "i18n:govoplan-scheduling.each_participant_can_answer_yes_to_at_most_one_candidate.5313a465": "Each participant can select Available or Maybe for at most one candidate slot.",
+    "i18n:govoplan-scheduling.edit_scheduling_request.7e749c19": "Edit scheduling request",
+    "i18n:govoplan-scheduling.invited_participant_identity_is_locked_remove_and_add_the_participant_to_change_it.34e1201a": "An invited participant's name and email are locked. Remove and add the participant to change them.",
+    "i18n:govoplan-scheduling.guest_links_are_not_issued_while_the_configured_participation.0794ebf0": "Guest links are not issued while the configured participation controls cannot be enforced by the public response gateway. Signed-in participants can still respond here.",
+    "i18n:govoplan-scheduling.guest_password.94545e82": "Guest password",
+    "i18n:govoplan-scheduling.let_participants_add_a_comment_to_their_response.9dce8d17": "Let participants add a comment to their response.",
+    "i18n:govoplan-scheduling.limit_participants_per_option.1e9aa51d": "Limit participants per option",
+    "i18n:govoplan-scheduling.maximum_participants_per_option.5abdfb27": "Maximum participants per option",
+    "i18n:govoplan-scheduling.notify_me_about_each_answer.505749d6": "Notify me about each answer",
+    "i18n:govoplan-scheduling.participants_can_choose_only_one_option.4311f51c": "Participants can choose only one option",
+    "i18n:govoplan-scheduling.participation.9ad70cc4": "Participation",
+    "i18n:govoplan-scheduling.participation_rate.46bc5504": "Participation rate",
+    "i18n:govoplan-scheduling.participation_settings.8dc6f62c": "Participation settings",
+    "i18n:govoplan-scheduling.participant_privacy.108c470f": "Participant privacy",
+    "i18n:govoplan-scheduling.participation_controls_are_locked_after_invitation_links_are_issued.66f5a740": "Participation controls are locked after invitation links are issued. Participant visibility and answer notifications can still be changed.",
+    "i18n:govoplan-scheduling.password_protect_guest_access.13d7f08b": "Password-protect guest access",
+    "i18n:govoplan-scheduling.people_responding_without_an_account_must_provide_an_email.19fd3dc8": "People responding without an account must provide an email address.",
+    "i18n:govoplan-scheduling.people_who_are_not_signed_in_must_enter_this_password.82bcc4ce": "People who are not signed in must enter this password before viewing the request.",
+    "i18n:govoplan-scheduling.search_visible_accounts_and_contacts_or_add_an_external_perso.877f6b44": "Search accounts and contacts you are allowed to discover. If external participants are enabled, you can also add a name and email address manually.",
+    "i18n:govoplan-scheduling.when_enabled_people_outside_the_configured_accounts_and.78829735": "When enabled, people outside the configured accounts and contacts can be added manually.",
+    "i18n:govoplan-scheduling.provide_a_maybe_option.e39da57a": "Provide a Maybe option",
+    "i18n:govoplan-scheduling.require_an_email_address_from_guests.c2289a58": "Require an email address from guests",
+    "i18n:govoplan-scheduling.responses.3427e3ab": "Responses",
+    "i18n:govoplan-scheduling.response_results_are_not_available_for_this_view.1e82db18": "Response results are not available for this view.",
+    "i18n:govoplan-scheduling.notifications_could_not_be_loaded.f0e1b2c3": "Notifications could not be loaded.",
+    "i18n:govoplan-scheduling.stop_accepting_yes_responses_for_an_option_when_its_limit.79af21db": "Stop accepting Available responses for an option when its limit is reached.",
+    "i18n:govoplan-scheduling.use_at_least_8_characters_the_password_is_never_displayed.035708a2": "Use at least 8 characters. The password is never displayed after it is saved.",
     "i18n:govoplan-scheduling.add_participant.6cff957d": "Add participant",
     "i18n:govoplan-scheduling.add_scheduling_request.3c71be15": "Add scheduling request",
     "i18n:govoplan-scheduling.add_slot.9fcff3ed": "Add slot",
@@ -21,7 +86,6 @@ export const generatedTranslations = {
     "i18n:govoplan-scheduling.close_poll.a6a18916": "Close poll",
     "i18n:govoplan-scheduling.close_stops_accepting_new_availability_responses.a1d57519": "Close stops accepting new availability responses.",
     "i18n:govoplan-scheduling.closed.88d86b77": "Closed",
-    "i18n:govoplan-scheduling.create_and_open_scheduling_request.1dbc9345": "Create and open scheduling request",
     "i18n:govoplan-scheduling.create_calendar_event.0b87cfcf": "Create calendar event",
     "i18n:govoplan-scheduling.create_tentative_holds.51c4744e": "Create tentative holds",
     "i18n:govoplan-scheduling.cancellation.319aaae4": "Cancellation",
@@ -108,6 +172,71 @@ export const generatedTranslations = {
     "i18n:govoplan-scheduling.your_response_has_been_recorded.b855088d": "Your response has been recorded."
   },
   de: {
+    "i18n:govoplan-scheduling.access_details.79c06b89": "Zugangsdaten",
+    "i18n:govoplan-scheduling.automatic_invitation_delivery_is_unavailable_copy_the_link_instead.4e39d0b3": "Die automatische Einladungszustellung ist nicht verfügbar; kopieren Sie stattdessen den Link.",
+    "i18n:govoplan-scheduling.cancellation_notice_available_until.f840d1e6": "Stornierungshinweis verfügbar bis",
+    "i18n:govoplan-scheduling.copy_a_fresh_invitation_link_for_value0.e3799c79": "Einen neuen Einladungslink für {value0} kopieren",
+    "i18n:govoplan-scheduling.enter_the_details_supplied_with_the_invitation_for_privacy.81ba419c": "Geben Sie die mit der Einladung übermittelten Daten ein. Aus Datenschutzgründen wird für ungültige und abgelaufene Links dieselbe Meldung angezeigt.",
+    "i18n:govoplan-scheduling.loading_scheduling_request.43c39c1b": "Terminanfrage wird geladen …",
+    "i18n:govoplan-scheduling.invitation_delivery_failed_the_link_was_created_but_was_not_delivered.8db0c306": "Die Zustellung der Einladung ist fehlgeschlagen. Der Link wurde erstellt, aber nicht zugestellt.",
+    "i18n:govoplan-scheduling.invitation_delivery_requested.1aaa78ba": "Die Zustellung der Einladung wurde angefordert.",
+    "i18n:govoplan-scheduling.invitation_link_copied.332973ec": "Einladungslink kopiert.",
+    "i18n:govoplan-scheduling.invitation_link_revoked.c7dd20d4": "Einladungslink widerrufen.",
+    "i18n:govoplan-scheduling.no_active_invitation_link_to_revoke.4ad0f0cc": "Kein aktiver Einladungslink zum Widerrufen vorhanden.",
+    "i18n:govoplan-scheduling.open_in_scheduling.48df1541": "In der Terminplanung öffnen",
+    "i18n:govoplan-scheduling.open_scheduling_request.31829cce": "Terminanfrage öffnen",
+    "i18n:govoplan-scheduling.response_deadline.7fd9e3aa": "Antwortfrist",
+    "i18n:govoplan-scheduling.reload_the_request_before_changing_this_invitation.9e685df4": "Laden Sie die Anfrage neu, bevor Sie diese Einladung ändern.",
+    "i18n:govoplan-scheduling.participant.554f4235": "Teilnehmende Person",
+    "i18n:govoplan-scheduling.revoke_invitation_link.87bf89cf": "Einladungslink widerrufen",
+    "i18n:govoplan-scheduling.revoke_link.da371ee1": "Link widerrufen",
+    "i18n:govoplan-scheduling.revoke_the_current_invitation_link_for_value0_it_will_stop_working_immediately.3cdc5817": "Den aktuellen Einladungslink für {value0} widerrufen? Er funktioniert danach sofort nicht mehr.",
+    "i18n:govoplan-scheduling.revoke_the_invitation_link_for_value0.15a9c9fa": "Den Einladungslink für {value0} widerrufen",
+    "i18n:govoplan-scheduling.send_a_fresh_invitation_to_value0.fd8d9dea": "Eine neue Einladung an {value0} senden",
+    "i18n:govoplan-scheduling.the_cancellation_notice_has_expired_a_new_link_cannot_be_issued.9c6ccc7c": "Der Stornierungshinweis ist abgelaufen; ein neuer Link kann nicht ausgestellt werden.",
+    "i18n:govoplan-scheduling.the_invitation_link_could_not_be_copied_check_browser_clipboard_permissions_and_try_again.a8b17cbc": "Der Einladungslink konnte nicht kopiert werden. Prüfen Sie die Zwischenablageberechtigungen des Browsers und versuchen Sie es erneut.",
+    "i18n:govoplan-scheduling.this_participant_has_no_deliverable_email_address_or_account.dbe14180": "Für diese teilnehmende Person ist weder eine zustellbare E-Mail-Adresse noch ein Konto hinterlegt.",
+    "i18n:govoplan-scheduling.this_invitation_changed_the_request_was_reloaded_try_again.c7095533": "Diese Einladung wurde zwischenzeitlich geändert. Die Anfrage wurde neu geladen; versuchen Sie es erneut.",
+    "i18n:govoplan-scheduling.this_scheduling_link_is_invalid_expired_or_the_access_details.8e7aa197": "Dieser Terminlink ist ungültig oder abgelaufen, oder die Zugangsdaten stimmen nicht überein.",
+    "i18n:govoplan-scheduling.this_scheduling_request_was_cancelled.1af3c85e": "Diese Terminanfrage wurde storniert.",
+    "i18n:govoplan-scheduling.this_scheduling_request_is_no_longer_accepting_responses.c612e78a": "Diese Terminanfrage nimmt keine Antworten mehr an.",
+    "i18n:govoplan-scheduling.your_availability.f86c8215": "Ihre Verfügbarkeit",
+    "i18n:govoplan-scheduling.save_or_discard_your_unsent_availability_changes_before_leaving.97e10df1": "Speichern oder verwerfen Sie Ihre noch nicht gesendeten Verfügbarkeitsänderungen, bevor Sie die Ansicht verlassen.",
+    "i18n:govoplan-scheduling.a_slot_can_be_selected_after_the_request_is_closed.f91ec02d": "Ein Terminvorschlag kann ausgewählt werden, nachdem die Anfrage geschlossen wurde.",
+    "i18n:govoplan-scheduling.add_maybe_between_yes_and_no_for_each_candidate_slot.74dc9db6": "Für jeden Terminvorschlag Vielleicht zwischen Verfügbar und Nicht verfügbar anbieten.",
+    "i18n:govoplan-scheduling.allow_comments.d63202a6": "Kommentare erlauben",
+    "i18n:govoplan-scheduling.allow_external_participants.a9efcb52": "Externe Teilnehmende erlauben",
+    "i18n:govoplan-scheduling.awaiting.42aa82e0": "Ausstehend",
+    "i18n:govoplan-scheduling.capacity.d3c375f8": "Kapazität",
+    "i18n:govoplan-scheduling.comment.d03495b1": "Kommentar",
+    "i18n:govoplan-scheduling.create_an_organizer_notification_whenever_a_response_is.253ddca8": "Bei jeder neuen oder geänderten Antwort eine Benachrichtigung für die organisierende Person erstellen.",
+    "i18n:govoplan-scheduling.each_participant_can_answer_yes_to_at_most_one_candidate.5313a465": "Jede teilnehmende Person kann höchstens einen Terminvorschlag als Verfügbar oder Vielleicht markieren.",
+    "i18n:govoplan-scheduling.edit_scheduling_request.7e749c19": "Terminanfrage bearbeiten",
+    "i18n:govoplan-scheduling.invited_participant_identity_is_locked_remove_and_add_the_participant_to_change_it.34e1201a": "Name und E-Mail-Adresse einer eingeladenen Person sind gesperrt. Entfernen Sie die Person und fügen Sie sie erneut hinzu, um diese Angaben zu ändern.",
+    "i18n:govoplan-scheduling.guest_links_are_not_issued_while_the_configured_participation.0794ebf0": "Gastlinks werden nicht ausgegeben, solange die konfigurierten Teilnahmeregeln am öffentlichen Antwortzugang nicht durchgesetzt werden können. Angemeldete Teilnehmende können weiterhin hier antworten.",
+    "i18n:govoplan-scheduling.guest_password.94545e82": "Gastpasswort",
+    "i18n:govoplan-scheduling.let_participants_add_a_comment_to_their_response.9dce8d17": "Teilnehmende können ihrer Antwort einen Kommentar hinzufügen.",
+    "i18n:govoplan-scheduling.limit_participants_per_option.1e9aa51d": "Teilnehmende je Terminvorschlag begrenzen",
+    "i18n:govoplan-scheduling.maximum_participants_per_option.5abdfb27": "Maximale Teilnehmendenzahl je Terminvorschlag",
+    "i18n:govoplan-scheduling.notify_me_about_each_answer.505749d6": "Über jede Antwort benachrichtigen",
+    "i18n:govoplan-scheduling.participants_can_choose_only_one_option.4311f51c": "Teilnehmende können nur einen Terminvorschlag wählen",
+    "i18n:govoplan-scheduling.participation.9ad70cc4": "Teilnahme",
+    "i18n:govoplan-scheduling.participation_rate.46bc5504": "Teilnahmequote",
+    "i18n:govoplan-scheduling.participation_settings.8dc6f62c": "Teilnahmeeinstellungen",
+    "i18n:govoplan-scheduling.participant_privacy.108c470f": "Datenschutz für Teilnehmende",
+    "i18n:govoplan-scheduling.participation_controls_are_locked_after_invitation_links_are_issued.66f5a740": "Teilnahmeregeln sind gesperrt, nachdem Einladungslinks erstellt wurden. Sichtbarkeit und Antwortbenachrichtigungen können weiterhin geändert werden.",
+    "i18n:govoplan-scheduling.password_protect_guest_access.13d7f08b": "Gastzugang mit Passwort schützen",
+    "i18n:govoplan-scheduling.people_responding_without_an_account_must_provide_an_email.19fd3dc8": "Personen ohne Konto müssen für ihre Antwort eine E-Mail-Adresse angeben.",
+    "i18n:govoplan-scheduling.people_who_are_not_signed_in_must_enter_this_password.82bcc4ce": "Nicht angemeldete Personen müssen dieses Passwort eingeben, bevor sie die Anfrage sehen können.",
+    "i18n:govoplan-scheduling.search_visible_accounts_and_contacts_or_add_an_external_perso.877f6b44": "Suchen Sie nach Konten und Kontakten, die Sie sehen dürfen. Wenn externe Teilnehmende erlaubt sind, können Sie Name und E-Mail-Adresse auch manuell hinzufügen.",
+    "i18n:govoplan-scheduling.when_enabled_people_outside_the_configured_accounts_and.78829735": "Wenn diese Option aktiviert ist, können Personen außerhalb der eingerichteten Konten und Kontakte manuell hinzugefügt werden.",
+    "i18n:govoplan-scheduling.provide_a_maybe_option.e39da57a": "Antwort Vielleicht anbieten",
+    "i18n:govoplan-scheduling.require_an_email_address_from_guests.c2289a58": "E-Mail-Adresse von Gästen verlangen",
+    "i18n:govoplan-scheduling.responses.3427e3ab": "Antworten",
+    "i18n:govoplan-scheduling.response_results_are_not_available_for_this_view.1e82db18": "Antwortergebnisse sind für diese Ansicht nicht verfügbar.",
+    "i18n:govoplan-scheduling.notifications_could_not_be_loaded.f0e1b2c3": "Benachrichtigungen konnten nicht geladen werden.",
+    "i18n:govoplan-scheduling.stop_accepting_yes_responses_for_an_option_when_its_limit.79af21db": "Keine weiteren Verfügbar-Antworten annehmen, sobald die Begrenzung eines Terminvorschlags erreicht ist.",
+    "i18n:govoplan-scheduling.use_at_least_8_characters_the_password_is_never_displayed.035708a2": "Verwenden Sie mindestens 8 Zeichen. Das Passwort wird nach dem Speichern nicht mehr angezeigt.",
     "i18n:govoplan-scheduling.add_participant.6cff957d": "Teilnehmende Person hinzufügen",
     "i18n:govoplan-scheduling.add_scheduling_request.3c71be15": "Terminanfrage hinzufügen",
     "i18n:govoplan-scheduling.add_slot.9fcff3ed": "Terminvorschlag hinzufügen",
@@ -129,7 +258,6 @@ export const generatedTranslations = {
     "i18n:govoplan-scheduling.close_poll.a6a18916": "Abstimmung schließen",
     "i18n:govoplan-scheduling.close_stops_accepting_new_availability_responses.a1d57519": "Schließen beendet die Annahme neuer Verfügbarkeitsantworten.",
     "i18n:govoplan-scheduling.closed.88d86b77": "Geschlossen",
-    "i18n:govoplan-scheduling.create_and_open_scheduling_request.1dbc9345": "Terminanfrage erstellen und öffnen",
     "i18n:govoplan-scheduling.create_calendar_event.0b87cfcf": "Kalendertermin erstellen",
     "i18n:govoplan-scheduling.create_tentative_holds.51c4744e": "Vorläufige Reservierungen erstellen",
     "i18n:govoplan-scheduling.cancellation.319aaae4": "Stornierung",

webui/src/module.ts

@@ -1,23 +1,91 @@
 import { createElement, lazy } from "react";
-import type { PlatformWebModule } from "@govoplan/core-webui";
+import type {
+  DashboardWidgetsUiCapability,
+  PlatformWebModule
+} from "@govoplan/core-webui";
+import SchedulingRequestsWidget from "./features/scheduling/SchedulingRequestsWidget";
 import { generatedTranslations } from "./i18n/generatedTranslations";
 import "./styles/scheduling.css";
 
 const SchedulingPage = lazy(() => import("./features/scheduling/SchedulingPage"));
+const SchedulingPublicPage = lazy(() => import("./features/scheduling/SchedulingPublicPage"));
 
 const scheduleRead = ["scheduling:schedule:read"];
+const schedulingDashboardWidgets: DashboardWidgetsUiCapability = {
+  widgets: [
+    {
+      id: "scheduling.open-requests",
+      surfaceId: "scheduling.widget.open-requests",
+      title: "Scheduling requests",
+      description: "Open scheduling polls and their response progress.",
+      moduleId: "scheduling",
+      category: "Planning",
+      order: 45,
+      defaultVisible: false,
+      defaultSize: "medium",
+      supportedSizes: ["medium", "wide"],
+      anyOf: scheduleRead,
+      refreshIntervalMs: 60_000,
+      defaultConfiguration: {
+        maxItems: 5,
+        includeDrafts: false
+      },
+      configurationFields: [
+        {
+          id: "maxItems",
+          label: "Maximum requests",
+          kind: "number",
+          min: 1,
+          max: 12,
+          step: 1,
+          required: true
+        },
+        {
+          id: "includeDrafts",
+          label: "Include drafts",
+          kind: "boolean"
+        }
+      ],
+      render: ({ settings, refreshKey, configuration }) =>
+        createElement(SchedulingRequestsWidget, {
+          settings,
+          refreshKey,
+          configuration
+        })
+    }
+  ]
+};
 
 export const schedulingModule: PlatformWebModule = {
   id: "scheduling",
   label: "Scheduling",
-  version: "1.0.0",
+  version: "0.1.11",
   dependencies: ["poll"],
-  optionalDependencies: ["calendar", "mail", "notifications", "workflow", "appointments", "addresses"],
+  optionalDependencies: ["access", "calendar", "mail", "notifications", "workflow", "appointments", "addresses"],
   translations: generatedTranslations,
+  viewSurfaces: [
+    {
+      id: "scheduling.widget.open-requests",
+      moduleId: "scheduling",
+      kind: "section",
+      label: "Scheduling requests widget",
+      order: 45
+    }
+  ],
   navItems: [{ to: "/scheduling", label: "Scheduling", iconName: "calendar-clock", anyOf: scheduleRead, order: 56 }],
   routes: [
     { path: "/scheduling", anyOf: scheduleRead, order: 56, render: ({ settings, auth }) => createElement(SchedulingPage, { settings, auth }) }
-  ]
+  ],
+  publicRoutes: [
+    {
+      path: "/scheduling/public/:requestId/:token",
+      order: 10,
+      render: ({ settings, auth }) => createElement(SchedulingPublicPage, { settings, auth })
+    }
+  ],
+  uiCapabilities: {
+    "dashboard.widgets": schedulingDashboardWidgets
+  }
 };
 
 export default schedulingModule;

webui/src/styles/scheduling.css

@@ -7,14 +7,117 @@
   background: var(--bg);
 }
 
+.scheduling-public-page {
+  width: min(920px, calc(100% - 32px));
+  margin: 0 auto;
+  padding: 24px 0 48px;
+}
+
+.scheduling-public-page .loading-frame {
+  min-height: 240px;
+}
+
+.scheduling-public-content,
+.scheduling-public-access-form,
+.scheduling-public-slots {
+  display: grid;
+  gap: 14px;
+}
+
+.scheduling-public-deep-link,
+.scheduling-public-actions {
+  display: flex;
+  justify-content: flex-end;
+  margin-bottom: 12px;
+}
+
+.scheduling-public-actions {
+  margin: 0;
+}
+
+.scheduling-public-description {
+  white-space: pre-wrap;
+}
+
+.scheduling-public-summary {
+  display: grid;
+  grid-template-columns: max-content minmax(0, 1fr);
+  gap: 6px 14px;
+  margin: 12px 0;
+}
+
+.scheduling-public-summary dt {
+  color: var(--muted);
+}
+
+.scheduling-public-summary dd {
+  margin: 0;
+}
+
+.scheduling-public-slot {
+  min-width: 0;
+  margin: 0;
+  padding: 14px;
+  border: var(--border-line);
+  border-radius: var(--radius-md);
+}
+
+.scheduling-public-slot legend {
+  padding: 0 4px;
+  color: var(--text-strong);
+  font-weight: 650;
+}
+
+.scheduling-public-slot p {
+  margin: 4px 0;
+}
+
+.scheduling-public-choice-group {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 8px;
+  margin-top: 12px;
+}
+
+.scheduling-public-choice-group label {
+  display: inline-flex;
+  align-items: center;
+  gap: 6px;
+  min-height: 36px;
+  padding: 7px 12px;
+  border: var(--border-line);
+  border-radius: var(--radius-md);
+  background: var(--panel-soft);
+  cursor: pointer;
+}
+
+.scheduling-public-choice-group label:has(input:checked) {
+  border-color: var(--accent);
+  background: var(--accent-soft);
+}
+
+@media (max-width: 680px) {
+  .scheduling-public-page {
+    width: min(100% - 20px, 920px);
+    padding-top: 12px;
+  }
+
+  .scheduling-public-page .form-grid.two-col {
+    grid-template-columns: 1fr;
+  }
+
+  .scheduling-public-summary {
+    grid-template-columns: 1fr;
+  }
+}
+
 .scheduling-page *,
 .scheduling-page *::before,
 .scheduling-page *::after {
   box-sizing: border-box;
 }
 
-.scheduling-workspace,
-.scheduling-full-editor {
+.scheduling-workspace {
   width: 100%;
   height: 100%;
   min-width: 0;
@@ -26,6 +129,72 @@
   background: var(--bg);
 }
 
+.scheduling-workspace-layout {
+  min-width: 0;
+  min-height: 0;
+  flex: 1 1 auto;
+  display: grid;
+  grid-template-columns: minmax(310px, 370px) minmax(0, 1fr);
+  overflow: hidden;
+}
+
+.scheduling-request-sidebar,
+.scheduling-main-panel,
+.scheduling-editor-surface {
+  min-width: 0;
+  min-height: 0;
+}
+
+.scheduling-request-sidebar {
+  padding: 12px;
+  border-right: var(--border-line);
+  background: var(--panel-soft);
+}
+
+.scheduling-request-sidebar > .card {
+  height: 100%;
+  display: flex;
+  flex-direction: column;
+}
+
+.scheduling-request-sidebar > .card > .card-body {
+  min-height: 0;
+  flex: 1 1 auto;
+  overflow: auto;
+  padding: 10px 12px;
+}
+
+.scheduling-sidebar-actions {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+}
+
+.scheduling-sidebar-actions .btn {
+  display: inline-flex;
+  align-items: center;
+  gap: 5px;
+}
+
+.scheduling-main-panel {
+  display: flex;
+  flex-direction: column;
+  overflow: hidden;
+  background: var(--bg);
+}
+
+.scheduling-main-panel > .alert {
+  flex: 0 0 auto;
+  margin: 12px 14px 0;
+}
+
+.scheduling-editor-surface {
+  flex: 1 1 auto;
+  display: flex;
+  flex-direction: column;
+  overflow: hidden;
+}
+
 .scheduling-page-header {
   min-height: 58px;
   flex: 0 0 auto;
@@ -89,28 +258,9 @@
   gap: 6px;
 }
 
-.scheduling-alert,
-.scheduling-success {
-  margin: 10px 14px 0;
-  padding: 9px 11px;
-  border: var(--border-line);
-  border-radius: 7px;
-}
-
-.scheduling-alert {
-  border-color: var(--danger-border-strong);
-  color: var(--danger-text-strong);
-  background: var(--danger-soft);
-}
-
-.scheduling-success {
-  border-color: var(--success);
-  color: var(--success);
-  background: color-mix(in srgb, var(--success) 10%, var(--panel));
-}
-
 .scheduling-detail,
 .scheduling-editor-scroll {
+  flex: 1 1 auto;
   min-width: 0;
   min-height: 0;
   overflow: auto;
@@ -124,15 +274,21 @@
   gap: 12px;
 }
 
-.scheduling-request-groups {
-  display: grid;
-  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
-  gap: 12px;
+.scheduling-request-group + .scheduling-request-group {
+  margin-top: 14px;
+  padding-top: 14px;
+  border-top: var(--border-line);
+}
+
+.scheduling-request-group h2 {
+  margin: 0 0 8px;
+  color: var(--text-strong);
+  font-size: 13px;
 }
 
 .scheduling-list-group {
   min-height: 52px;
-  max-height: 270px;
+  max-height: min(31vh, 320px);
   overflow: auto;
 }
 
@@ -171,14 +327,6 @@
   font-size: 12px;
 }
 
-.scheduling-list-status {
-  max-width: 120px;
-  padding: 3px 7px;
-  border-radius: 999px;
-  background: var(--panel-soft);
-  font-weight: 700;
-}
-
 .scheduling-list-empty {
   margin: 3px 0 8px;
 }
@@ -187,46 +335,12 @@
   flex-wrap: wrap;
 }
 
-.scheduling-status {
-  padding: 4px 8px;
-  border-radius: 999px;
-  color: var(--text-strong);
-  background: var(--panel-soft);
-  font-size: 12px;
-  font-weight: 800;
-}
-
-.scheduling-status-collecting,
-.scheduling-status-handed_off {
-  background: color-mix(in srgb, var(--accent) 18%, transparent);
-}
-
 .scheduling-slot-title {
   min-width: 0;
   display: grid;
   justify-items: start;
 }
 
-.scheduling-freebusy {
-  display: inline-block;
-  margin-top: 3px;
-  padding: 2px 6px;
-  border-radius: 5px;
-  color: var(--muted);
-  background: var(--panel-soft);
-  font-size: 11px;
-  font-weight: 700;
-}
-
-.scheduling-freebusy.free {
-  color: var(--success);
-}
-
-.scheduling-freebusy.busy,
-.scheduling-freebusy.error {
-  color: var(--danger-text-strong);
-}
-
 .scheduling-columns {
   display: grid;
   grid-template-columns: repeat(2, minmax(0, 1fr));
@@ -284,20 +398,6 @@
   color: var(--muted);
 }
 
-.scheduling-response-grid select,
-.scheduling-field input,
-.scheduling-field textarea,
-.scheduling-grid-input {
-  width: 100%;
-  min-height: 36px;
-  padding: 7px 9px;
-  border: var(--border-line);
-  border-radius: 6px;
-  color: var(--text);
-  background: var(--control-bg);
-  font: inherit;
-}
-
 .scheduling-action-help {
   margin: 0;
 }
@@ -308,47 +408,14 @@
   text-align: center;
 }
 
-.scheduling-editor-page {
-  background: var(--panel);
-}
-
-.scheduling-editor-layout {
+.scheduling-setting-with-field {
   min-width: 0;
-  min-height: 0;
-  flex: 1 1 auto;
   display: grid;
-  grid-template-columns: 198px minmax(0, 1fr);
-  overflow: hidden;
+  gap: 10px;
 }
 
-.scheduling-create-subnav {
-  min-height: 0;
-}
-
-.scheduling-create-section {
-  min-width: 0;
-  scroll-margin-top: 14px;
-}
-
-.scheduling-form-grid {
-  display: grid;
-  grid-template-columns: repeat(2, minmax(0, 1fr));
-  gap: 12px;
-}
-
-.scheduling-field-wide {
-  grid-column: 1 / -1;
-}
-
-.scheduling-field {
-  display: grid;
-  gap: 5px;
-}
-
-.scheduling-field > span {
-  color: var(--muted);
-  font-size: 12px;
-  font-weight: 800;
+.scheduling-setting-with-field .form-field {
+  padding-left: 48px;
 }
 
 .scheduling-capability-note {
@@ -362,9 +429,10 @@
 }
 
 @media (max-width: 900px) {
-  .scheduling-editor-layout {
-    grid-template-columns: minmax(0, 1fr);
+  .scheduling-workspace-layout {
+    grid-template-columns: minmax(270px, 320px) minmax(0, 1fr);
   }
+
 }
 
 @media (max-width: 820px) {
@@ -375,16 +443,27 @@
   }
 
   .scheduling-workspace,
-  .scheduling-full-editor,
-  .scheduling-editor-layout,
+  .scheduling-workspace-layout,
+  .scheduling-main-panel,
+  .scheduling-editor-surface,
   .scheduling-detail,
   .scheduling-editor-scroll {
     height: auto;
     overflow: visible;
   }
 
-  .scheduling-columns,
-  .scheduling-form-grid {
+  .scheduling-workspace-layout {
+    display: grid;
+    grid-template-columns: minmax(0, 1fr);
+  }
+
+  .scheduling-request-sidebar {
+    max-height: 48vh;
+    border-right: 0;
+    border-bottom: var(--border-line);
+  }
+
+  .scheduling-columns {
     grid-template-columns: minmax(0, 1fr);
   }
 

webui/tests/scheduling-view-model.test.ts

@@ -2,11 +2,105 @@ import assert from "node:assert/strict";
 import test from "node:test";
 import type { SchedulingRequest } from "../src/api/scheduling.ts";
 import {
+  applySchedulingAvailabilityChoice,
   groupSchedulingRequests,
+  participantDraftFromResponse,
+  participantDraftsFromPicker,
+  participantPayload,
+  schedulingInvitationActionBlocks,
+  schedulingPublicInvitationUrl,
   schedulingSortPhase,
   type SchedulingActor
 } from "../src/features/scheduling/schedulingViewModel.ts";
 
+test("maps visible account and contact selections into bounded scheduling participant payloads", () => {
+  let sequence = 0;
+  const selected = participantDraftsFromPicker([
+    {
+      selection_key: "account:account-2",
+      kind: "account",
+      reference_id: "account-2",
+      display_name: "Ada Account",
+      email: "ADA@EXAMPLE.TEST",
+      source_module: "access",
+      source_label: "Accounts",
+      provenance: { tenant_id: "must-not-be-persisted" },
+      metadata: { group_ids: ["must-not-be-persisted"] }
+    },
+    {
+      selection_key: "contact:contact-3:contact@example.test",
+      kind: "contact",
+      reference_id: "contact-3",
+      display_name: "Contact Person",
+      email: "contact@example.test",
+      source_module: "addresses",
+      source_label: "Contacts",
+      source_revision: "revision-3",
+      provenance: { address_book_id: "must-not-be-persisted" }
+    }
+  ], [], () => `participant-${++sequence}`);
+
+  assert.equal(selected[0].respondent_id, "account-2");
+  assert.equal(selected[0].participant_type, "internal");
+  assert.equal(selected[0].email, "ada@example.test");
+  assert.deepEqual(selected[0].metadata, {
+    directory_selection: {
+      selection_key: "account:account-2",
+      kind: "account",
+      reference_id: "account-2",
+      source_module: "access",
+      source_label: "Accounts",
+      source_revision: null
+    }
+  });
+  assert.equal(selected[1].respondent_id, null);
+  assert.equal(selected[1].participant_type, "external");
+  assert.equal(
+    (selected[1].metadata?.directory_selection as { source_revision: string }).source_revision,
+    "revision-3"
+  );
+  assert.deepEqual(participantPayload(selected[1]), {
+    respondent_id: null,
+    display_name: "Contact Person",
+    email: "contact@example.test",
+    participant_type: "external",
+    required: true,
+    metadata: selected[1].metadata
+  });
+});
+
+test("reconstructs saved directory selections and preserves existing reconciliation identity", () => {
+  const responseParticipant = {
+    id: "stored-participant",
+    revision: "a".repeat(64),
+    is_current_participant: false,
+    respondent_id: "account-2",
+    display_name: "Ada Account",
+    email: "ada@example.test",
+    participant_type: "internal",
+    required: true,
+    status: "invited",
+    poll_invitation_id: "invitation-1",
+    metadata: {
+      directory_selection: {
+        selection_key: "account:account-2",
+        kind: "account",
+        reference_id: "account-2",
+        source_module: "access",
+        source_label: "Accounts"
+      }
+    }
+  };
+  const draft = participantDraftFromResponse(responseParticipant, "draft-1");
+  const remapped = participantDraftsFromPicker([draft], [draft], () => "unexpected");
+
+  assert.equal(remapped[0], draft);
+  assert.equal(draft.sourceId, "stored-participant");
+  assert.equal(draft.identityLocked, true);
+  assert.equal(participantPayload(draft).id, "stored-participant");
+  assert.equal(participantPayload(draft).revision, "a".repeat(64));
+});
+
 const now = new Date("2026-07-20T10:00:00Z");
 const actor: SchedulingActor = {
   accountId: "account-1",
@@ -47,6 +141,16 @@ function request(
       source_path: [],
       details: {}
     },
+    notify_on_answers: true,
+    single_choice: false,
+    max_participants_per_option: null,
+    allow_maybe: true,
+    allow_comments: false,
+    participant_email_required: false,
+    anonymous_password_protection_enabled: false,
+    public_participation_policy_enforcement_available: false,
+    public_participation_policy_enforcement_reason: "Public participation gateway not installed",
+    participant_invitation_delivery_available: false,
     calendar_integration_enabled: false,
     calendar_freebusy_enabled: false,
     calendar_hold_enabled: false,
@@ -61,11 +165,13 @@ function request(
       end_at: options.end ?? "2026-07-21T10:00:00Z",
       timezone: "UTC",
       position: 0,
+      revision: "0".repeat(64),
       freebusy_conflicts: [],
       metadata: {}
     }],
     participants: options.participantStatus ? [{
       id: `participant-${id}`,
+      is_current_participant: true,
       respondent_id: "membership-1",
       email: "person@example.test",
       participant_type: "internal",
@@ -88,6 +194,29 @@ test("groups owned, invited, and administrator-only requests without hiding any"
   assert.deepEqual(groups.other.map((item) => item.id), ["managed"]);
 });
 
+test("matches email-only invitations without case sensitivity", () => {
+  const invited = request("email-case", { participantStatus: "invited" });
+  invited.participants[0].is_current_participant = false;
+  invited.participants[0].respondent_id = null;
+  invited.participants[0].email = "Person@Example.Test";
+
+  const groups = groupSchedulingRequests([invited], actor, now);
+
+  assert.deepEqual(groups.invited.map((item) => item.id), ["email-case"]);
+  assert.deepEqual(groups.other, []);
+});
+
+test("recognizes the current participant after identity bindings are redacted", () => {
+  const invited = request("safe-projection", { participantStatus: "invited" });
+  invited.participants[0].respondent_id = null;
+  invited.participants[0].email = null;
+
+  const groups = groupSchedulingRequests([invited], actor, now);
+
+  assert.deepEqual(groups.invited.map((item) => item.id), ["safe-projection"]);
+  assert.deepEqual(groups.other, []);
+});
+
 test("keeps an organizer's active request in the open phase even if they also responded", () => {
   const owned = request("mine-and-invited", {
     organizer: "account-1",
@@ -122,3 +251,130 @@ test("orders unanswered by nearest slot before answered, closed, determined, and
   assert.equal(schedulingSortPhase(groups.invited[0], actor, now), "unanswered");
   assert.equal(schedulingSortPhase(groups.invited.at(-1)!, actor, now), "past");
 });
+
+test("derives stable invitation action blocks from policy, delivery, and participant state", () => {
+  const managed = request("invitation-actions", { participantStatus: "invited" });
+  managed.poll_id = "poll-1";
+  managed.public_participation_policy_enforcement_available = true;
+  managed.public_participation_policy_enforcement_reason = null;
+  managed.participant_invitation_delivery_available = true;
+  const participant = managed.participants[0];
+  assert.deepEqual(schedulingInvitationActionBlocks(managed, participant, now), {
+    copy: "participant_revision_unavailable",
+    send: "participant_revision_unavailable",
+    revoke: "participant_revision_unavailable"
+  });
+  participant.revision = "a".repeat(64);
+  participant.poll_invitation_id = "invitation-1";
+
+  assert.deepEqual(schedulingInvitationActionBlocks(managed, participant, now), {
+    copy: null,
+    send: null,
+    revoke: null
+  });
+
+  managed.participant_invitation_delivery_available = false;
+  assert.equal(
+    schedulingInvitationActionBlocks(managed, participant, now).send,
+    "delivery_unavailable"
+  );
+
+  managed.participant_invitation_delivery_available = true;
+  participant.email = null;
+  participant.respondent_id = `scheduling-participant:${participant.id}`;
+  assert.equal(
+    schedulingInvitationActionBlocks(managed, participant, now).send,
+    "no_delivery_target"
+  );
+
+  managed.public_participation_policy_enforcement_available = false;
+  assert.deepEqual(schedulingInvitationActionBlocks(managed, participant, now), {
+    copy: "participation_policy_unavailable",
+    send: "participation_policy_unavailable",
+    revoke: "participation_policy_unavailable"
+  });
+
+  participant.poll_invitation_id = null;
+  assert.equal(
+    schedulingInvitationActionBlocks(managed, participant, now).revoke,
+    "no_active_invitation"
+  );
+});
+
+test("allows bounded cancelled-request links until the notice expires without blocking revocation", () => {
+  const cancelled = request("cancelled-invitation", {
+    participantStatus: "invited",
+    status: "cancelled"
+  });
+  cancelled.poll_id = "poll-1";
+  cancelled.public_participation_policy_enforcement_available = true;
+  cancelled.participant_invitation_delivery_available = true;
+  cancelled.cancellation_notice_until = "2026-07-20T11:00:00Z";
+  cancelled.participants[0].revision = "b".repeat(64);
+  cancelled.participants[0].poll_invitation_id = "invitation-1";
+
+  assert.deepEqual(schedulingInvitationActionBlocks(cancelled, cancelled.participants[0], now), {
+    copy: null,
+    send: null,
+    revoke: null
+  });
+
+  cancelled.cancellation_notice_until = "2026-07-20T09:00:00Z";
+  assert.deepEqual(schedulingInvitationActionBlocks(cancelled, cancelled.participants[0], now), {
+    copy: "cancellation_notice_expired",
+    send: "cancellation_notice_expired",
+    revoke: null
+  });
+});
+
+test("accepts only same-origin Scheduling public invitation URLs", () => {
+  assert.equal(
+    schedulingPublicInvitationUrl(
+      "/scheduling/public/request-1/token-1",
+      "https://govoplan.example"
+    ),
+    "https://govoplan.example/scheduling/public/request-1/token-1"
+  );
+  assert.equal(
+    schedulingPublicInvitationUrl(
+      "https://attacker.example/scheduling/public/request-1/token-1",
+      "https://govoplan.example"
+    ),
+    null
+  );
+  assert.equal(
+    schedulingPublicInvitationUrl(
+      "/scheduling/publicity/request-1/token-1",
+      "https://govoplan.example"
+    ),
+    null
+  );
+});
+
+test("single-choice availability keeps one positive choice while preserving explicit no answers", () => {
+  const next = applySchedulingAvailabilityChoice(
+    ["slot-a", "slot-b", "slot-c"],
+    { "slot-a": "available", "slot-b": "maybe", "slot-c": "unavailable" },
+    "slot-b",
+    "available",
+    true
+  );
+
+  assert.deepEqual(next, {
+    "slot-a": "unavailable",
+    "slot-b": "available",
+    "slot-c": "unavailable"
+  });
+});
+
+test("multi-choice availability changes only the selected slot", () => {
+  const next = applySchedulingAvailabilityChoice(
+    ["slot-a", "slot-b"],
+    { "slot-a": "available" },
+    "slot-b",
+    "maybe",
+    false
+  );
+
+  assert.deepEqual(next, { "slot-a": "available", "slot-b": "maybe" });
+});