fix(migrations): adopt existing scheduling schema

LICENSE

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README.md

@@ -1,12 +1,17 @@
 # GovOPlaN Scheduling
 
+<!-- govoplan-repository-type:start -->
+**Repository type:** module (domain).
+<!-- govoplan-repository-type:end -->
+
 GovOPlaN Scheduling owns meeting scheduling and `Terminfindung`: finding
 suitable times across people, resources, calendars, constraints, and scheduling
 polls.
 
-This repository is currently a tag-only scaffold. It should gain package
-metadata, a backend manifest, and a WebUI package together when the first
-implementation slice is designed.
+This repository is initialized as a discoverable module seed. It exposes the
+module manifest, permission surface, role templates, and documentation metadata
+before runtime APIs, database models, migrations, and WebUI routes are
+introduced.
 
 The core boundary decision register is in
 `/mnt/DATA/git/govoplan-core/docs/MODULE_ARCHITECTURE.md`.
@@ -15,7 +20,7 @@ The core boundary decision register is in
 
 Scheduling owns:
 
-- meeting scheduling polls and proposals
+- meeting scheduling polls and proposals built on `govoplan-poll`
 - participant availability collection
 - time-window and resource constraints
 - candidate-slot ranking and conflict explanation
@@ -64,24 +69,52 @@ unless a configured process requires longer evidence retention.
 - `scheduling.decisionHandoff`
 - `scheduling.portalParticipation`
 
+## Manifest Dependency Decision
+
+The Scheduling manifest declares `poll` as a required dependency because
+availability collection and option/date poll primitives belong in
+`govoplan-poll`.
+
+Scheduling should model each meeting-finding flow as a poll-backed workflow:
+Poll owns candidate options, signed participation links, responses, visibility,
+and result aggregation. Scheduling stores the scheduling-specific context and
+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.
+
 ## Expected Integrations
 
+- `govoplan-poll`: required availability matrix and lightweight poll primitives
+- `govoplan-evaluation`: optional post-event, post-appointment, or process feedback
 - `govoplan-calendar`: availability, calendars, resources, rooms, recurrence, Open-Xchange/calendar adapters
 - `govoplan-appointments`: conversion from a selected meeting time into a booked appointment where appropriate
-- `govoplan-access` and `govoplan-idm`: participants, groups, directory lookup, permissions
+- `govoplan-access` and `govoplan-idm`: optional participants, groups, directory lookup, permissions
 - `govoplan-mail` and `govoplan-notifications`: invitations, reminders, confirmations
 - `govoplan-portal`: external participant scheduling flows
 - `govoplan-workflow` and `govoplan-tasks`: follow-up work after a time is selected
 
 ## First Package Scaffold Decision
 
-The first scaffold should include both backend and WebUI package metadata once
-implementation starts:
+The first backend implementation slice adds runtime APIs and storage around
+poll-backed scheduling requests:
 
-- backend manifest, permissions, DTOs, and APIs for internal polls
-- WebUI route contribution for poll creation and response collection
-- capability contracts for calendar free/busy, access/IDM lookup,
-  mail/notification sending, portal participation links, appointment handoff,
-  and workflow/task follow-up
+- scheduling request, candidate slot, and participant storage
+- automatic `govoplan-poll` availability poll creation
+- signed poll invitations for internal or external participants
+- 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
+- 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 active backlog lives in Gitea issues.

pyproject.toml

@@ -0,0 +1,25 @@
+[build-system]
+requires = ["setuptools>=69", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "govoplan-scheduling"
+version = "0.1.9"
+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",
+]
+
+[tool.setuptools.packages.find]
+where = ["src"]
+
+[tool.setuptools.package-data]
+govoplan_scheduling = ["py.typed"]
+
+[project.entry-points."govoplan.modules"]
+scheduling = "govoplan_scheduling.backend.manifest:get_manifest"

src/govoplan_scheduling/__init__.py

@@ -0,0 +1,5 @@
+"""GovOPlaN Scheduling module."""
+
+__all__ = ["__version__"]
+
+__version__ = "0.1.9"

src/govoplan_scheduling/backend/__init__.py

@@ -0,0 +1 @@
+"""Backend package for the GovOPlaN Scheduling module."""

src/govoplan_scheduling/backend/db/__init__.py

@@ -0,0 +1,5 @@
+from __future__ import annotations
+
+from govoplan_scheduling.backend.db.models import SchedulingCandidateSlot, SchedulingNotification, SchedulingParticipant, SchedulingRequest
+
+__all__ = ["SchedulingCandidateSlot", "SchedulingNotification", "SchedulingParticipant", "SchedulingRequest"]

src/govoplan_scheduling/backend/db/models.py

@@ -0,0 +1,144 @@
+from __future__ import annotations
+
+import uuid
+from datetime import datetime
+from typing import Any
+
+from sqlalchemy import Boolean, DateTime, ForeignKey, Index, Integer, JSON, String, Text
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from govoplan_core.db.base import Base, TimestampMixin
+
+
+def new_uuid() -> str:
+    return str(uuid.uuid4())
+
+
+class SchedulingRequest(Base, TimestampMixin):
+    __tablename__ = "scheduling_requests"
+    __table_args__ = (
+        Index("ix_scheduling_requests_tenant_status", "tenant_id", "status"),
+        Index("ix_scheduling_requests_tenant_poll", "tenant_id", "poll_id"),
+        Index("ix_scheduling_requests_deadline", "tenant_id", "deadline_at"),
+    )
+
+    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_uuid)
+    tenant_id: Mapped[str] = mapped_column(String(36), nullable=False, index=True)
+    title: Mapped[str] = mapped_column(String(500), nullable=False)
+    description: Mapped[str | None] = mapped_column(Text)
+    location: Mapped[str | None] = mapped_column(String(500))
+    timezone: Mapped[str] = mapped_column(String(100), default="UTC", nullable=False)
+    status: Mapped[str] = mapped_column(String(40), default="draft", nullable=False, index=True)
+    poll_id: Mapped[str | None] = mapped_column(String(36), nullable=True, index=True)
+    selected_slot_id: Mapped[str | None] = mapped_column(String(36), nullable=True, index=True)
+    organizer_user_id: Mapped[str | None] = mapped_column(String(36), nullable=True, index=True)
+    deadline_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True, index=True)
+    allow_external_participants: Mapped[bool] = mapped_column(Boolean, default=True, nullable=False)
+    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)
+    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)
+    calendar_hold_enabled: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
+    create_calendar_event_on_decision: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
+    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)
+    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)
+
+    slots: Mapped[list["SchedulingCandidateSlot"]] = relationship(
+        back_populates="request",
+        cascade="all, delete-orphan",
+        order_by="SchedulingCandidateSlot.position",
+    )
+    participants: Mapped[list["SchedulingParticipant"]] = relationship(
+        back_populates="request",
+        cascade="all, delete-orphan",
+        order_by="SchedulingParticipant.created_at",
+    )
+
+
+class SchedulingCandidateSlot(Base, TimestampMixin):
+    __tablename__ = "scheduling_candidate_slots"
+    __table_args__ = (
+        Index("ix_scheduling_candidate_slots_request_position", "request_id", "position"),
+        Index("ix_scheduling_candidate_slots_range", "tenant_id", "start_at", "end_at"),
+    )
+
+    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_uuid)
+    tenant_id: Mapped[str] = mapped_column(String(36), nullable=False, index=True)
+    request_id: Mapped[str] = mapped_column(ForeignKey("scheduling_requests.id", ondelete="CASCADE"), nullable=False, index=True)
+    poll_option_id: Mapped[str | None] = mapped_column(String(36), nullable=True, index=True)
+    label: Mapped[str] = mapped_column(String(500), nullable=False)
+    description: Mapped[str | None] = mapped_column(Text)
+    start_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, index=True)
+    end_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, index=True)
+    timezone: Mapped[str] = mapped_column(String(100), default="UTC", nullable=False)
+    location: Mapped[str | None] = mapped_column(String(500))
+    position: Mapped[int] = mapped_column(Integer, default=0, nullable=False)
+    freebusy_checked_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+    freebusy_status: Mapped[str | None] = mapped_column(String(40), nullable=True, index=True)
+    freebusy_conflicts: Mapped[list[dict[str, Any]]] = mapped_column(JSON, default=list, nullable=False)
+    tentative_hold_event_id: Mapped[str | None] = mapped_column(String(36), nullable=True, index=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)
+
+    request: Mapped[SchedulingRequest] = relationship(back_populates="slots")
+
+
+class SchedulingParticipant(Base, TimestampMixin):
+    __tablename__ = "scheduling_participants"
+    __table_args__ = (
+        Index("ix_scheduling_participants_request", "tenant_id", "request_id"),
+        Index("ix_scheduling_participants_request_email", "request_id", "email"),
+        Index("ix_scheduling_participants_request_respondent", "request_id", "respondent_id"),
+    )
+
+    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_uuid)
+    tenant_id: Mapped[str] = mapped_column(String(36), nullable=False, index=True)
+    request_id: Mapped[str] = mapped_column(ForeignKey("scheduling_requests.id", ondelete="CASCADE"), nullable=False, index=True)
+    respondent_id: Mapped[str | None] = mapped_column(String(255), nullable=True, index=True)
+    display_name: Mapped[str | None] = mapped_column(String(500), nullable=True)
+    email: Mapped[str | None] = mapped_column(String(320), nullable=True, index=True)
+    participant_type: Mapped[str] = mapped_column(String(30), default="external", nullable=False, index=True)
+    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)
+    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)
+    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)
+
+    request: Mapped[SchedulingRequest] = relationship(back_populates="participants")
+
+
+class SchedulingNotification(Base, TimestampMixin):
+    __tablename__ = "scheduling_notifications"
+    __table_args__ = (
+        Index("ix_scheduling_notifications_request_status", "request_id", "status"),
+        Index("ix_scheduling_notifications_tenant_status", "tenant_id", "status"),
+    )
+
+    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_uuid)
+    tenant_id: Mapped[str] = mapped_column(String(36), nullable=False, index=True)
+    request_id: Mapped[str] = mapped_column(ForeignKey("scheduling_requests.id", ondelete="CASCADE"), nullable=False, index=True)
+    participant_id: Mapped[str | None] = mapped_column(String(36), nullable=True, index=True)
+    event_kind: Mapped[str] = mapped_column(String(40), nullable=False, index=True)
+    channel: Mapped[str] = mapped_column(String(40), default="mail", nullable=False, index=True)
+    recipient: Mapped[str | None] = mapped_column(String(500), nullable=True, index=True)
+    status: Mapped[str] = mapped_column(String(40), default="pending", nullable=False, index=True)
+    payload: Mapped[dict[str, Any]] = mapped_column(JSON, default=dict, nullable=False)
+    error: Mapped[str | None] = mapped_column(Text)
+    sent_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+    metadata_: Mapped[dict[str, Any] | None] = mapped_column("metadata", JSON, nullable=True)
+
+
+__all__ = [
+    "SchedulingCandidateSlot",
+    "SchedulingNotification",
+    "SchedulingParticipant",
+    "SchedulingRequest",
+    "new_uuid",
+]

src/govoplan_scheduling/backend/manifest.py

@@ -0,0 +1,193 @@
+from __future__ import annotations
+
+from pathlib import Path
+
+from govoplan_core.core.access import CAPABILITY_AUTH_PERMISSION_EVALUATOR, CAPABILITY_AUTH_PRINCIPAL_RESOLVER
+from govoplan_core.core.calendar import CAPABILITY_CALENDAR_SCHEDULING
+from govoplan_core.core.module_guards import drop_table_retirement_provider, persistent_table_uninstall_guard
+from govoplan_core.core.modules import (
+    DocumentationTopic,
+    FrontendModule,
+    MigrationSpec,
+    ModuleContext,
+    ModuleInterfaceProvider,
+    ModuleInterfaceRequirement,
+    ModuleManifest,
+    NavItem,
+    PermissionDefinition,
+    RoleTemplate,
+)
+from govoplan_core.db.base import Base
+from govoplan_core.core.poll import CAPABILITY_POLL_SCHEDULING
+from govoplan_core.core.policy import CAPABILITY_POLICY_SCHEDULING_PARTICIPANT_PRIVACY
+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"
+READ_SCOPE = "scheduling:schedule:read"
+WRITE_SCOPE = "scheduling:schedule:write"
+ADMIN_SCOPE = "scheduling:schedule:admin"
+RESPOND_SCOPE = "scheduling:availability:write"
+
+
+def _permission(scope: str, label: str, description: str) -> PermissionDefinition:
+    module_id, resource, action = scope.split(":", 2)
+    return PermissionDefinition(
+        scope=scope,
+        label=label,
+        description=description,
+        category="Scheduling",
+        level="tenant",
+        module_id=module_id,
+        resource=resource,
+        action=action,
+    )
+
+
+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(RESPOND_SCOPE, "Respond to scheduling polls", "Submit and update own scheduling availability responses."),
+)
+
+ROLE_TEMPLATES = (
+    RoleTemplate(
+        slug="scheduling_manager",
+        name="Scheduling manager",
+        description="Create scheduling polls, manage candidate slots, and decide outcomes.",
+        permissions=(READ_SCOPE, WRITE_SCOPE, RESPOND_SCOPE),
+    ),
+    RoleTemplate(
+        slug="scheduling_participant",
+        name="Scheduling participant",
+        description="Read assigned scheduling polls and submit own availability.",
+        permissions=(READ_SCOPE, RESPOND_SCOPE),
+    ),
+)
+
+DOCUMENTATION = (
+    DocumentationTopic(
+        id="scheduling.module-boundary",
+        title="Scheduling module boundary",
+        summary="Meeting scheduling and Terminfindung built on reusable Poll availability primitives.",
+        body=(
+            "Scheduling owns meeting scheduling workflows, candidate slots, participant availability "
+            "collection, conflict explanation, reminders, and decision handoff. It depends on Poll "
+            "for reusable availability matrices and poll-backed workflow context, and can optionally "
+            "trigger Evaluation for post-event feedback. "
+            "Access is optional: when installed, Scheduling can use principal resolution, permission "
+            "evaluation, groups, and role templates; without it, reduced signed-link or local organizer "
+            "flows remain possible."
+        ),
+        layer="available",
+        documentation_types=("admin",),
+        audience=("operator", "module_admin", "product_owner"),
+        related_modules=("poll", "evaluation", "calendar", "appointments", "mail", "notifications", "portal"),
+        metadata={"seed": True},
+    ),
+)
+
+
+def _tenant_summary(session, tenant_id: str) -> dict[str, int]:
+    from govoplan_scheduling.backend.db.models import SchedulingCandidateSlot, SchedulingNotification, SchedulingParticipant, SchedulingRequest
+
+    return {
+        "scheduling_requests": (
+            session.query(SchedulingRequest)
+            .filter(SchedulingRequest.tenant_id == tenant_id, SchedulingRequest.deleted_at.is_(None))
+            .count()
+        ),
+        "scheduling_candidate_slots": (
+            session.query(SchedulingCandidateSlot)
+            .filter(SchedulingCandidateSlot.tenant_id == tenant_id, SchedulingCandidateSlot.deleted_at.is_(None))
+            .count()
+        ),
+        "scheduling_participants": (
+            session.query(SchedulingParticipant)
+            .filter(SchedulingParticipant.tenant_id == tenant_id, SchedulingParticipant.deleted_at.is_(None))
+            .count()
+        ),
+        "scheduling_notifications": (
+            session.query(SchedulingNotification)
+            .filter(SchedulingNotification.tenant_id == tenant_id, SchedulingNotification.status == "pending")
+            .count()
+        ),
+    }
+
+
+def _scheduling_router(context: ModuleContext):
+    from govoplan_scheduling.backend.runtime import configure_runtime
+    from govoplan_scheduling.backend.router import router
+
+    configure_runtime(registry=context.registry, settings=context.settings)
+    return router
+
+
+manifest = ModuleManifest(
+    id=MODULE_ID,
+    name=MODULE_NAME,
+    version=MODULE_VERSION,
+    dependencies=("poll",),
+    optional_dependencies=("access", "calendar", "appointments", "evaluation", "mail", "notifications", "policy", "portal", "workflow", "tasks", "idm", "organizations", "addresses"),
+    optional_capabilities=(
+        CAPABILITY_AUTH_PRINCIPAL_RESOLVER,
+        CAPABILITY_AUTH_PERMISSION_EVALUATOR,
+        CAPABILITY_CALENDAR_SCHEDULING,
+        CAPABILITY_POLICY_SCHEDULING_PARTICIPANT_PRIVACY,
+    ),
+    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"),
+    ),
+    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="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="calendar.scheduling", version_min="0.1.8", version_max_exclusive="0.2.0", optional=True),
+    ),
+    permissions=PERMISSIONS,
+    role_templates=ROLE_TEMPLATES,
+    nav_items=(NavItem(path="/scheduling", label="Scheduling", icon="calendar-clock", required_any=(READ_SCOPE,), order=56),),
+    frontend=FrontendModule(
+        module_id=MODULE_ID,
+        package_name="@govoplan/scheduling-webui",
+        nav_items=(NavItem(path="/scheduling", label="Scheduling", icon="calendar-clock", required_any=(READ_SCOPE,), order=56),),
+    ),
+    route_factory=_scheduling_router,
+    tenant_summary_providers=(_tenant_summary,),
+    migration_spec=MigrationSpec(
+        module_id=MODULE_ID,
+        metadata=Base.metadata,
+        script_location=str(Path(__file__).with_name("migrations") / "versions"),
+        retirement_supported=True,
+        retirement_provider=drop_table_retirement_provider(
+            scheduling_models.SchedulingRequest,
+            scheduling_models.SchedulingCandidateSlot,
+            scheduling_models.SchedulingParticipant,
+            scheduling_models.SchedulingNotification,
+            label="Scheduling",
+        ),
+        retirement_notes="Destructive retirement drops scheduling-owned database tables after the installer captures a database snapshot.",
+    ),
+    uninstall_guard_providers=(
+        persistent_table_uninstall_guard(
+            scheduling_models.SchedulingRequest,
+            scheduling_models.SchedulingCandidateSlot,
+            scheduling_models.SchedulingParticipant,
+            scheduling_models.SchedulingNotification,
+            label="Scheduling",
+        ),
+    ),
+    documentation=DOCUMENTATION,
+)
+
+
+def get_manifest() -> ModuleManifest:
+    return manifest

src/govoplan_scheduling/backend/migrations/__init__.py

@@ -0,0 +1 @@
+from __future__ import annotations

src/govoplan_scheduling/backend/migrations/versions/3c4d5e6f7a8b_v018_scheduling_baseline.py

@@ -0,0 +1,320 @@
+"""v0.1.8 scheduling baseline
+
+Revision ID: 3c4d5e6f7a8b
+Revises: None
+Create Date: 2026-07-12 00:00:00.000000
+"""
+from __future__ import annotations
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision = "3c4d5e6f7a8b"
+down_revision = None
+branch_labels = None
+depends_on = "2a3b4c5d6e7f"
+
+
+_BASELINE_COLUMNS = {
+    "scheduling_requests": {
+        "id",
+        "tenant_id",
+        "title",
+        "description",
+        "location",
+        "timezone",
+        "status",
+        "poll_id",
+        "selected_slot_id",
+        "organizer_user_id",
+        "deadline_at",
+        "allow_external_participants",
+        "allow_participant_updates",
+        "result_visibility",
+        "calendar_integration_enabled",
+        "calendar_id",
+        "calendar_freebusy_enabled",
+        "calendar_hold_enabled",
+        "create_calendar_event_on_decision",
+        "calendar_event_id",
+        "handed_off_at",
+        "cancelled_at",
+        "deleted_at",
+        "metadata",
+        "created_at",
+        "updated_at",
+    },
+    "scheduling_candidate_slots": {
+        "id",
+        "tenant_id",
+        "request_id",
+        "poll_option_id",
+        "label",
+        "description",
+        "start_at",
+        "end_at",
+        "timezone",
+        "location",
+        "position",
+        "deleted_at",
+        "metadata",
+        "created_at",
+        "updated_at",
+    },
+    "scheduling_participants": {
+        "id",
+        "tenant_id",
+        "request_id",
+        "respondent_id",
+        "display_name",
+        "email",
+        "participant_type",
+        "required",
+        "status",
+        "poll_invitation_id",
+        "last_invited_at",
+        "responded_at",
+        "deleted_at",
+        "metadata",
+        "created_at",
+        "updated_at",
+    },
+}
+
+_BASELINE_INDEXES = {
+    "scheduling_requests": {
+        "ix_scheduling_requests_calendar_event_id",
+        "ix_scheduling_requests_calendar_id",
+        "ix_scheduling_requests_deadline",
+        "ix_scheduling_requests_deadline_at",
+        "ix_scheduling_requests_deleted_at",
+        "ix_scheduling_requests_organizer_user_id",
+        "ix_scheduling_requests_poll_id",
+        "ix_scheduling_requests_selected_slot_id",
+        "ix_scheduling_requests_status",
+        "ix_scheduling_requests_tenant_id",
+        "ix_scheduling_requests_tenant_poll",
+        "ix_scheduling_requests_tenant_status",
+    },
+    "scheduling_candidate_slots": {
+        "ix_scheduling_candidate_slots_deleted_at",
+        "ix_scheduling_candidate_slots_end_at",
+        "ix_scheduling_candidate_slots_poll_option_id",
+        "ix_scheduling_candidate_slots_range",
+        "ix_scheduling_candidate_slots_request_id",
+        "ix_scheduling_candidate_slots_request_position",
+        "ix_scheduling_candidate_slots_start_at",
+        "ix_scheduling_candidate_slots_tenant_id",
+    },
+    "scheduling_participants": {
+        "ix_scheduling_participants_deleted_at",
+        "ix_scheduling_participants_email",
+        "ix_scheduling_participants_last_invited_at",
+        "ix_scheduling_participants_participant_type",
+        "ix_scheduling_participants_poll_invitation_id",
+        "ix_scheduling_participants_request",
+        "ix_scheduling_participants_request_email",
+        "ix_scheduling_participants_request_id",
+        "ix_scheduling_participants_request_respondent",
+        "ix_scheduling_participants_responded_at",
+        "ix_scheduling_participants_respondent_id",
+        "ix_scheduling_participants_status",
+        "ix_scheduling_participants_tenant_id",
+    },
+}
+
+
+def _request_foreign_key_exists(inspector: sa.Inspector, table_name: str) -> bool:
+    return any(
+        tuple(item.get("constrained_columns") or ()) == ("request_id",)
+        and item.get("referred_table") == "scheduling_requests"
+        and tuple(item.get("referred_columns") or ()) == ("id",)
+        and str((item.get("options") or {}).get("ondelete", "")).upper() == "CASCADE"
+        for item in inspector.get_foreign_keys(table_name)
+    )
+
+
+def _adopt_existing_baseline() -> bool:
+    """Adopt the complete unversioned Scheduling baseline, never a partial one."""
+
+    inspector = sa.inspect(op.get_bind())
+    expected_tables = set(_BASELINE_COLUMNS)
+    present_tables = expected_tables.intersection(inspector.get_table_names())
+    if not present_tables:
+        return False
+
+    problems: list[str] = []
+    missing_tables = expected_tables - present_tables
+    if missing_tables:
+        problems.append(f"missing tables: {', '.join(sorted(missing_tables))}")
+
+    for table_name in sorted(present_tables):
+        columns = {item["name"] for item in inspector.get_columns(table_name)}
+        missing_columns = _BASELINE_COLUMNS[table_name] - columns
+        if missing_columns:
+            problems.append(f"{table_name} missing columns: {', '.join(sorted(missing_columns))}")
+
+        indexes = {item["name"] for item in inspector.get_indexes(table_name)}
+        missing_indexes = _BASELINE_INDEXES[table_name] - indexes
+        if missing_indexes:
+            problems.append(f"{table_name} missing indexes: {', '.join(sorted(missing_indexes))}")
+
+        primary_key = tuple(inspector.get_pk_constraint(table_name).get("constrained_columns") or ())
+        if primary_key != ("id",):
+            problems.append(f"{table_name} has unexpected primary key: {primary_key!r}")
+
+    for table_name in ("scheduling_candidate_slots", "scheduling_participants"):
+        if table_name in present_tables and not _request_foreign_key_exists(inspector, table_name):
+            problems.append(f"{table_name} is missing its cascading request_id foreign key")
+
+    if problems:
+        detail = "; ".join(problems)
+        raise RuntimeError(
+            "Cannot adopt the existing Scheduling v0.1.8 baseline because it is incomplete or ambiguous: "
+            f"{detail}"
+        )
+    return True
+
+
+def upgrade() -> None:
+    if _adopt_existing_baseline():
+        return
+
+    op.create_table(
+        "scheduling_requests",
+        sa.Column("id", sa.String(length=36), nullable=False),
+        sa.Column("tenant_id", sa.String(length=36), nullable=False),
+        sa.Column("title", sa.String(length=500), nullable=False),
+        sa.Column("description", sa.Text(), nullable=True),
+        sa.Column("location", sa.String(length=500), nullable=True),
+        sa.Column("timezone", sa.String(length=100), nullable=False),
+        sa.Column("status", sa.String(length=40), nullable=False),
+        sa.Column("poll_id", sa.String(length=36), nullable=True),
+        sa.Column("selected_slot_id", sa.String(length=36), nullable=True),
+        sa.Column("organizer_user_id", sa.String(length=36), nullable=True),
+        sa.Column("deadline_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("allow_external_participants", sa.Boolean(), nullable=False),
+        sa.Column("allow_participant_updates", sa.Boolean(), nullable=False),
+        sa.Column("result_visibility", sa.String(length=30), nullable=False),
+        sa.Column("calendar_integration_enabled", sa.Boolean(), nullable=False),
+        sa.Column("calendar_id", sa.String(length=36), nullable=True),
+        sa.Column("calendar_freebusy_enabled", sa.Boolean(), nullable=False),
+        sa.Column("calendar_hold_enabled", sa.Boolean(), nullable=False),
+        sa.Column("create_calendar_event_on_decision", sa.Boolean(), nullable=False),
+        sa.Column("calendar_event_id", sa.String(length=36), nullable=True),
+        sa.Column("handed_off_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("cancelled_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("deleted_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("metadata", sa.JSON(), nullable=True),
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False),
+        sa.PrimaryKeyConstraint("id", name=op.f("pk_scheduling_requests")),
+    )
+    op.create_index(op.f("ix_scheduling_requests_calendar_event_id"), "scheduling_requests", ["calendar_event_id"], unique=False)
+    op.create_index(op.f("ix_scheduling_requests_calendar_id"), "scheduling_requests", ["calendar_id"], unique=False)
+    op.create_index(op.f("ix_scheduling_requests_deadline_at"), "scheduling_requests", ["deadline_at"], unique=False)
+    op.create_index(op.f("ix_scheduling_requests_deleted_at"), "scheduling_requests", ["deleted_at"], unique=False)
+    op.create_index(op.f("ix_scheduling_requests_organizer_user_id"), "scheduling_requests", ["organizer_user_id"], unique=False)
+    op.create_index(op.f("ix_scheduling_requests_poll_id"), "scheduling_requests", ["poll_id"], unique=False)
+    op.create_index(op.f("ix_scheduling_requests_selected_slot_id"), "scheduling_requests", ["selected_slot_id"], unique=False)
+    op.create_index(op.f("ix_scheduling_requests_status"), "scheduling_requests", ["status"], unique=False)
+    op.create_index(op.f("ix_scheduling_requests_tenant_id"), "scheduling_requests", ["tenant_id"], unique=False)
+    op.create_index("ix_scheduling_requests_deadline", "scheduling_requests", ["tenant_id", "deadline_at"], unique=False)
+    op.create_index("ix_scheduling_requests_tenant_poll", "scheduling_requests", ["tenant_id", "poll_id"], unique=False)
+    op.create_index("ix_scheduling_requests_tenant_status", "scheduling_requests", ["tenant_id", "status"], unique=False)
+
+    op.create_table(
+        "scheduling_candidate_slots",
+        sa.Column("id", sa.String(length=36), nullable=False),
+        sa.Column("tenant_id", sa.String(length=36), nullable=False),
+        sa.Column("request_id", sa.String(length=36), nullable=False),
+        sa.Column("poll_option_id", sa.String(length=36), nullable=True),
+        sa.Column("label", sa.String(length=500), nullable=False),
+        sa.Column("description", sa.Text(), nullable=True),
+        sa.Column("start_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("end_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("timezone", sa.String(length=100), nullable=False),
+        sa.Column("location", sa.String(length=500), nullable=True),
+        sa.Column("position", sa.Integer(), nullable=False),
+        sa.Column("deleted_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("metadata", sa.JSON(), nullable=True),
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False),
+        sa.ForeignKeyConstraint(
+            ["request_id"],
+            ["scheduling_requests.id"],
+            name=op.f("fk_scheduling_candidate_slots_request_id_scheduling_requests"),
+            ondelete="CASCADE",
+        ),
+        sa.PrimaryKeyConstraint("id", name=op.f("pk_scheduling_candidate_slots")),
+    )
+    op.create_index(op.f("ix_scheduling_candidate_slots_deleted_at"), "scheduling_candidate_slots", ["deleted_at"], unique=False)
+    op.create_index(op.f("ix_scheduling_candidate_slots_end_at"), "scheduling_candidate_slots", ["end_at"], unique=False)
+    op.create_index(op.f("ix_scheduling_candidate_slots_poll_option_id"), "scheduling_candidate_slots", ["poll_option_id"], unique=False)
+    op.create_index(op.f("ix_scheduling_candidate_slots_request_id"), "scheduling_candidate_slots", ["request_id"], unique=False)
+    op.create_index(op.f("ix_scheduling_candidate_slots_start_at"), "scheduling_candidate_slots", ["start_at"], unique=False)
+    op.create_index(op.f("ix_scheduling_candidate_slots_tenant_id"), "scheduling_candidate_slots", ["tenant_id"], unique=False)
+    op.create_index(
+        "ix_scheduling_candidate_slots_range",
+        "scheduling_candidate_slots",
+        ["tenant_id", "start_at", "end_at"],
+        unique=False,
+    )
+    op.create_index(
+        "ix_scheduling_candidate_slots_request_position",
+        "scheduling_candidate_slots",
+        ["request_id", "position"],
+        unique=False,
+    )
+
+    op.create_table(
+        "scheduling_participants",
+        sa.Column("id", sa.String(length=36), nullable=False),
+        sa.Column("tenant_id", sa.String(length=36), nullable=False),
+        sa.Column("request_id", sa.String(length=36), nullable=False),
+        sa.Column("respondent_id", sa.String(length=255), nullable=True),
+        sa.Column("display_name", sa.String(length=500), nullable=True),
+        sa.Column("email", sa.String(length=320), nullable=True),
+        sa.Column("participant_type", sa.String(length=30), nullable=False),
+        sa.Column("required", sa.Boolean(), nullable=False),
+        sa.Column("status", sa.String(length=40), nullable=False),
+        sa.Column("poll_invitation_id", sa.String(length=36), nullable=True),
+        sa.Column("last_invited_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("responded_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("deleted_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("metadata", sa.JSON(), nullable=True),
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False),
+        sa.ForeignKeyConstraint(
+            ["request_id"],
+            ["scheduling_requests.id"],
+            name=op.f("fk_scheduling_participants_request_id_scheduling_requests"),
+            ondelete="CASCADE",
+        ),
+        sa.PrimaryKeyConstraint("id", name=op.f("pk_scheduling_participants")),
+    )
+    op.create_index(op.f("ix_scheduling_participants_deleted_at"), "scheduling_participants", ["deleted_at"], unique=False)
+    op.create_index(op.f("ix_scheduling_participants_email"), "scheduling_participants", ["email"], unique=False)
+    op.create_index(op.f("ix_scheduling_participants_last_invited_at"), "scheduling_participants", ["last_invited_at"], unique=False)
+    op.create_index(op.f("ix_scheduling_participants_participant_type"), "scheduling_participants", ["participant_type"], unique=False)
+    op.create_index(op.f("ix_scheduling_participants_poll_invitation_id"), "scheduling_participants", ["poll_invitation_id"], unique=False)
+    op.create_index(op.f("ix_scheduling_participants_request_id"), "scheduling_participants", ["request_id"], unique=False)
+    op.create_index(op.f("ix_scheduling_participants_responded_at"), "scheduling_participants", ["responded_at"], unique=False)
+    op.create_index(op.f("ix_scheduling_participants_respondent_id"), "scheduling_participants", ["respondent_id"], unique=False)
+    op.create_index(op.f("ix_scheduling_participants_status"), "scheduling_participants", ["status"], unique=False)
+    op.create_index(op.f("ix_scheduling_participants_tenant_id"), "scheduling_participants", ["tenant_id"], unique=False)
+    op.create_index("ix_scheduling_participants_request", "scheduling_participants", ["tenant_id", "request_id"], unique=False)
+    op.create_index("ix_scheduling_participants_request_email", "scheduling_participants", ["request_id", "email"], unique=False)
+    op.create_index(
+        "ix_scheduling_participants_request_respondent",
+        "scheduling_participants",
+        ["request_id", "respondent_id"],
+        unique=False,
+    )
+
+
+def downgrade() -> None:
+    op.drop_table("scheduling_participants")
+    op.drop_table("scheduling_candidate_slots")
+    op.drop_table("scheduling_requests")

src/govoplan_scheduling/backend/migrations/versions/4d5e6f7a8b9c_v018_scheduling_calendar_notifications.py

@@ -0,0 +1,195 @@
+"""v0.1.8 scheduling calendar integration and notification outbox
+
+Revision ID: 4d5e6f7a8b9c
+Revises: 3c4d5e6f7a8b
+Create Date: 2026-07-12 00:00:00.000000
+"""
+from __future__ import annotations
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision = "4d5e6f7a8b9c"
+down_revision = "3c4d5e6f7a8b"
+branch_labels = None
+depends_on = None
+
+
+_CALENDAR_SLOT_COLUMNS = {
+    "freebusy_checked_at",
+    "freebusy_status",
+    "freebusy_conflicts",
+    "tentative_hold_event_id",
+}
+_CALENDAR_SLOT_INDEXES = {
+    "ix_scheduling_candidate_slots_freebusy_status",
+    "ix_scheduling_candidate_slots_tentative_hold_event_id",
+}
+_NOTIFICATION_COLUMNS = {
+    "id",
+    "tenant_id",
+    "request_id",
+    "participant_id",
+    "event_kind",
+    "channel",
+    "recipient",
+    "status",
+    "payload",
+    "error",
+    "sent_at",
+    "metadata",
+    "created_at",
+    "updated_at",
+}
+_NOTIFICATION_INDEXES = {
+    "ix_scheduling_notifications_channel",
+    "ix_scheduling_notifications_event_kind",
+    "ix_scheduling_notifications_participant_id",
+    "ix_scheduling_notifications_recipient",
+    "ix_scheduling_notifications_request_id",
+    "ix_scheduling_notifications_request_status",
+    "ix_scheduling_notifications_status",
+    "ix_scheduling_notifications_tenant_id",
+    "ix_scheduling_notifications_tenant_status",
+}
+
+
+def _adopt_existing_calendar_notifications() -> bool:
+    """Adopt only the complete calendar/notification extension."""
+
+    inspector = sa.inspect(op.get_bind())
+    tables = set(inspector.get_table_names())
+    if "scheduling_candidate_slots" not in tables:
+        raise RuntimeError(
+            "Cannot apply the Scheduling calendar migration because scheduling_candidate_slots is missing"
+        )
+
+    slot_columns = {item["name"] for item in inspector.get_columns("scheduling_candidate_slots")}
+    present_slot_columns = _CALENDAR_SLOT_COLUMNS.intersection(slot_columns)
+    notification_exists = "scheduling_notifications" in tables
+    if not present_slot_columns and not notification_exists:
+        return False
+
+    problems: list[str] = []
+    missing_slot_columns = _CALENDAR_SLOT_COLUMNS - slot_columns
+    if missing_slot_columns:
+        problems.append(
+            "scheduling_candidate_slots missing columns: "
+            f"{', '.join(sorted(missing_slot_columns))}"
+        )
+    slot_indexes = {item["name"] for item in inspector.get_indexes("scheduling_candidate_slots")}
+    missing_slot_indexes = _CALENDAR_SLOT_INDEXES - slot_indexes
+    if missing_slot_indexes:
+        problems.append(
+            "scheduling_candidate_slots missing indexes: "
+            f"{', '.join(sorted(missing_slot_indexes))}"
+        )
+
+    if not notification_exists:
+        problems.append("missing table: scheduling_notifications")
+    else:
+        notification_columns = {
+            item["name"] for item in inspector.get_columns("scheduling_notifications")
+        }
+        missing_notification_columns = _NOTIFICATION_COLUMNS - notification_columns
+        if missing_notification_columns:
+            problems.append(
+                "scheduling_notifications missing columns: "
+                f"{', '.join(sorted(missing_notification_columns))}"
+            )
+
+        notification_indexes = {
+            item["name"] for item in inspector.get_indexes("scheduling_notifications")
+        }
+        missing_notification_indexes = _NOTIFICATION_INDEXES - notification_indexes
+        if missing_notification_indexes:
+            problems.append(
+                "scheduling_notifications missing indexes: "
+                f"{', '.join(sorted(missing_notification_indexes))}"
+            )
+
+        primary_key = tuple(
+            inspector.get_pk_constraint("scheduling_notifications").get("constrained_columns") or ()
+        )
+        if primary_key != ("id",):
+            problems.append(f"scheduling_notifications has unexpected primary key: {primary_key!r}")
+
+        request_foreign_key_exists = any(
+            tuple(item.get("constrained_columns") or ()) == ("request_id",)
+            and item.get("referred_table") == "scheduling_requests"
+            and tuple(item.get("referred_columns") or ()) == ("id",)
+            and str((item.get("options") or {}).get("ondelete", "")).upper() == "CASCADE"
+            for item in inspector.get_foreign_keys("scheduling_notifications")
+        )
+        if not request_foreign_key_exists:
+            problems.append("scheduling_notifications is missing its cascading request_id foreign key")
+
+    if problems:
+        detail = "; ".join(problems)
+        raise RuntimeError(
+            "Cannot adopt the existing Scheduling v0.1.8 calendar/notification schema because it is "
+            f"incomplete or ambiguous: {detail}"
+        )
+    return True
+
+
+def upgrade() -> None:
+    if _adopt_existing_calendar_notifications():
+        return
+
+    op.add_column("scheduling_candidate_slots", sa.Column("freebusy_checked_at", sa.DateTime(timezone=True), nullable=True))
+    op.add_column("scheduling_candidate_slots", sa.Column("freebusy_status", sa.String(length=40), nullable=True))
+    op.add_column("scheduling_candidate_slots", sa.Column("freebusy_conflicts", sa.JSON(), nullable=False, server_default="[]"))
+    op.add_column("scheduling_candidate_slots", sa.Column("tentative_hold_event_id", sa.String(length=36), nullable=True))
+    op.create_index(op.f("ix_scheduling_candidate_slots_freebusy_status"), "scheduling_candidate_slots", ["freebusy_status"], unique=False)
+    op.create_index(
+        op.f("ix_scheduling_candidate_slots_tentative_hold_event_id"),
+        "scheduling_candidate_slots",
+        ["tentative_hold_event_id"],
+        unique=False,
+    )
+
+    op.create_table(
+        "scheduling_notifications",
+        sa.Column("id", sa.String(length=36), nullable=False),
+        sa.Column("tenant_id", sa.String(length=36), nullable=False),
+        sa.Column("request_id", sa.String(length=36), nullable=False),
+        sa.Column("participant_id", sa.String(length=36), nullable=True),
+        sa.Column("event_kind", sa.String(length=40), nullable=False),
+        sa.Column("channel", sa.String(length=40), nullable=False),
+        sa.Column("recipient", sa.String(length=500), nullable=True),
+        sa.Column("status", sa.String(length=40), nullable=False),
+        sa.Column("payload", sa.JSON(), nullable=False),
+        sa.Column("error", sa.Text(), nullable=True),
+        sa.Column("sent_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("metadata", sa.JSON(), nullable=True),
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False),
+        sa.ForeignKeyConstraint(
+            ["request_id"],
+            ["scheduling_requests.id"],
+            name=op.f("fk_scheduling_notifications_request_id_scheduling_requests"),
+            ondelete="CASCADE",
+        ),
+        sa.PrimaryKeyConstraint("id", name=op.f("pk_scheduling_notifications")),
+    )
+    op.create_index(op.f("ix_scheduling_notifications_channel"), "scheduling_notifications", ["channel"], unique=False)
+    op.create_index(op.f("ix_scheduling_notifications_event_kind"), "scheduling_notifications", ["event_kind"], unique=False)
+    op.create_index(op.f("ix_scheduling_notifications_participant_id"), "scheduling_notifications", ["participant_id"], unique=False)
+    op.create_index(op.f("ix_scheduling_notifications_recipient"), "scheduling_notifications", ["recipient"], unique=False)
+    op.create_index(op.f("ix_scheduling_notifications_request_id"), "scheduling_notifications", ["request_id"], unique=False)
+    op.create_index("ix_scheduling_notifications_request_status", "scheduling_notifications", ["request_id", "status"], unique=False)
+    op.create_index(op.f("ix_scheduling_notifications_status"), "scheduling_notifications", ["status"], unique=False)
+    op.create_index(op.f("ix_scheduling_notifications_tenant_id"), "scheduling_notifications", ["tenant_id"], unique=False)
+    op.create_index("ix_scheduling_notifications_tenant_status", "scheduling_notifications", ["tenant_id", "status"], unique=False)
+
+
+def downgrade() -> None:
+    op.drop_table("scheduling_notifications")
+    op.drop_index(op.f("ix_scheduling_candidate_slots_tentative_hold_event_id"), table_name="scheduling_candidate_slots")
+    op.drop_index(op.f("ix_scheduling_candidate_slots_freebusy_status"), table_name="scheduling_candidate_slots")
+    op.drop_column("scheduling_candidate_slots", "tentative_hold_event_id")
+    op.drop_column("scheduling_candidate_slots", "freebusy_conflicts")
+    op.drop_column("scheduling_candidate_slots", "freebusy_status")
+    op.drop_column("scheduling_candidate_slots", "freebusy_checked_at")

src/govoplan_scheduling/backend/migrations/versions/9c2f4a7d1e6b_v019_scheduling_participant_visibility.py

@@ -0,0 +1,43 @@
+"""v0.1.9 scheduling participant visibility
+
+Revision ID: 9c2f4a7d1e6b
+Revises: 4d5e6f7a8b9c
+Create Date: 2026-07-20 00:00:00.000000
+"""
+from __future__ import annotations
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision = "9c2f4a7d1e6b"
+down_revision = "4d5e6f7a8b9c"
+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("participant_visibility")
+    if existing is not None:
+        column_type = existing["type"]
+        if existing.get("nullable") or not isinstance(column_type, sa.String) or column_type.length != 32:
+            raise RuntimeError(
+                "Cannot adopt scheduling_requests.participant_visibility because its schema is unexpected"
+            )
+        return
+
+    op.add_column(
+        "scheduling_requests",
+        sa.Column(
+            "participant_visibility",
+            sa.String(length=32),
+            nullable=False,
+            server_default="aggregates_only",
+        ),
+    )
+
+
+def downgrade() -> None:
+    op.drop_column("scheduling_requests", "participant_visibility")

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

@@ -0,0 +1 @@
+from __future__ import annotations

src/govoplan_scheduling/backend/router.py

@@ -0,0 +1,569 @@
+from __future__ import annotations
+
+import dataclasses
+from typing import Any
+
+from fastapi import APIRouter, Depends, HTTPException, Query, status
+from sqlalchemy.orm import Session
+
+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.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,
+    SchedulingNotificationCreateRequest,
+    SchedulingNotificationListResponse,
+    SchedulingNotificationResponse,
+    SchedulingRequestCreateRequest,
+    SchedulingRequestListResponse,
+    SchedulingRequestResponse,
+    SchedulingRequestUpdateRequest,
+    SchedulingPollSummaryResponse,
+    SchedulingStatusResponse,
+    SchedulingSummaryResponse,
+)
+from govoplan_scheduling.backend.runtime import get_registry
+from govoplan_scheduling.backend.service import (
+    SchedulingConflictError,
+    SchedulingError,
+    SchedulingPermissionError,
+    cancel_scheduling_request,
+    close_scheduling_request,
+    create_final_calendar_event,
+    create_scheduling_notification_jobs,
+    create_scheduling_request,
+    create_tentative_calendar_holds,
+    decide_scheduling_request,
+    evaluate_calendar_freebusy,
+    get_scheduling_availability_response,
+    get_visible_scheduling_request,
+    list_visible_scheduling_notifications,
+    list_visible_scheduling_requests,
+    open_scheduling_request,
+    refresh_participant_response_state,
+    require_visible_scheduling_results,
+    scheduling_notification_response,
+    scheduling_request_response,
+    scheduling_request_summary,
+    submit_scheduling_availability,
+    update_scheduling_candidate_slot,
+    update_scheduling_request,
+)
+
+
+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:
+    if not has_scope(principal, scope):
+        raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail=f"Missing scope: {scope}")
+
+
+def _principal_actor_ids(principal: ApiPrincipal) -> tuple[str, ...]:
+    candidates = (
+        principal.account_id,
+        principal.membership_id,
+        getattr(principal.user, "id", None),
+        principal.identity_id,
+        principal.principal.service_account_id,
+        principal.email,
+    )
+    return tuple(dict.fromkeys(str(value) for value in candidates if value))
+
+
+def _can_manage_scheduling(principal: ApiPrincipal) -> bool:
+    return has_scope(principal, WRITE_SCOPE) or has_scope(principal, ADMIN_SCOPE)
+
+
+def _scheduling_http_error(exc: SchedulingError) -> HTTPException:
+    if isinstance(exc, SchedulingConflictError):
+        return HTTPException(status_code=status.HTTP_409_CONFLICT, detail=str(exc))
+    if isinstance(exc, SchedulingPermissionError):
+        return HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail=str(exc))
+    if str(exc) == "Scheduling request not found":
+        return HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=str(exc))
+    if str(exc) == "Scheduling results are not visible":
+        return HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail=str(exc))
+    return HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(exc))
+
+
+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),
+        )
+    )
+
+
+@router.get("/address-lookup", response_model=SchedulingAddressLookupResponse)
+def api_lookup_scheduling_addresses(
+    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],
+    )
+
+
+@router.get("/requests", response_model=SchedulingRequestListResponse)
+def api_list_scheduling_requests(
+    status_filter: str | None = Query(default=None, alias="status"),
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> SchedulingRequestListResponse:
+    _require_scope(principal, READ_SCOPE)
+    requests = list_visible_scheduling_requests(
+        session,
+        tenant_id=principal.tenant_id,
+        actor_ids=_principal_actor_ids(principal),
+        can_manage=_can_manage_scheduling(principal),
+        status=status_filter,
+    )
+    actor_ids = _principal_actor_ids(principal)
+    for request in requests:
+        refresh_participant_response_state(
+            session,
+            request=request,
+            actor_ids=actor_ids,
+        )
+    response = 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)
+def api_create_scheduling_request(
+    payload: SchedulingRequestCreateRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> SchedulingRequestResponse:
+    _require_scope(principal, WRITE_SCOPE)
+    try:
+        request, invitation_tokens = create_scheduling_request(
+            session,
+            tenant_id=principal.tenant_id,
+            user_id=principal.account_id,
+            payload=payload,
+        )
+    except SchedulingError as exc:
+        raise _scheduling_http_error(exc) from exc
+    response = _request_response(request, principal=principal, invitation_tokens=invitation_tokens)
+    session.commit()
+    return response
+
+
+@router.post("/requests/{request_id}/responses", response_model=SchedulingStatusResponse)
+def api_submit_scheduling_availability(
+    request_id: str,
+    payload: SchedulingAvailabilityResponseRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> SchedulingStatusResponse:
+    _require_scope(principal, RESPOND_SCOPE)
+    try:
+        request = submit_scheduling_availability(
+            session,
+            tenant_id=principal.tenant_id,
+            request_id=request_id,
+            actor_ids=_principal_actor_ids(principal),
+            respondent_id=principal.account_id,
+            respondent_label=principal.display_name or principal.email,
+            payload=payload,
+        )
+    except SchedulingError as exc:
+        raise _scheduling_http_error(exc) from exc
+    response = SchedulingStatusResponse(
+        request=_request_response(request, principal=principal)
+    )
+    session.commit()
+    return response
+
+
+@router.get("/requests/{request_id}/responses/me", response_model=SchedulingAvailabilityResponse)
+def api_get_my_scheduling_availability(
+    request_id: str,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> SchedulingAvailabilityResponse:
+    _require_scope(principal, RESPOND_SCOPE)
+    try:
+        response = get_scheduling_availability_response(
+            session,
+            tenant_id=principal.tenant_id,
+            request_id=request_id,
+            actor_ids=_principal_actor_ids(principal),
+            respondent_id=principal.account_id,
+        )
+    except SchedulingError as exc:
+        raise _scheduling_http_error(exc) from exc
+    return SchedulingAvailabilityResponse.model_validate(response)
+
+
+@router.get("/requests/{request_id}", response_model=SchedulingRequestResponse)
+def api_get_scheduling_request(
+    request_id: str,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> SchedulingRequestResponse:
+    _require_scope(principal, READ_SCOPE)
+    try:
+        request = get_visible_scheduling_request(
+            session,
+            tenant_id=principal.tenant_id,
+            request_id=request_id,
+            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
+
+
+@router.patch("/requests/{request_id}", response_model=SchedulingRequestResponse)
+def api_update_scheduling_request(
+    request_id: str,
+    payload: SchedulingRequestUpdateRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> SchedulingRequestResponse:
+    _require_scope(principal, WRITE_SCOPE)
+    try:
+        request = update_scheduling_request(
+            session,
+            tenant_id=principal.tenant_id,
+            request_id=request_id,
+            payload=payload,
+        )
+    except SchedulingError as exc:
+        raise _scheduling_http_error(exc) from exc
+    response = _request_response(request, principal=principal)
+    session.commit()
+    return response
+
+
+@router.patch("/requests/{request_id}/slots/{slot_id}", response_model=SchedulingRequestResponse)
+def api_update_scheduling_candidate_slot(
+    request_id: str,
+    slot_id: str,
+    payload: SchedulingCandidateSlotUpdateRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> SchedulingRequestResponse:
+    _require_scope(principal, WRITE_SCOPE)
+    try:
+        request = update_scheduling_candidate_slot(
+            session,
+            tenant_id=principal.tenant_id,
+            request_id=request_id,
+            slot_id=slot_id,
+            payload=payload,
+        )
+    except SchedulingError as exc:
+        raise _scheduling_http_error(exc) from exc
+    response = _request_response(request, principal=principal)
+    session.commit()
+    return response
+
+
+@router.post("/requests/{request_id}/open", response_model=SchedulingStatusResponse)
+def api_open_scheduling_request(
+    request_id: str,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> SchedulingStatusResponse:
+    _require_scope(principal, WRITE_SCOPE)
+    try:
+        request = open_scheduling_request(session, tenant_id=principal.tenant_id, request_id=request_id)
+    except SchedulingError as exc:
+        raise _scheduling_http_error(exc) from exc
+    response = SchedulingStatusResponse(request=_request_response(request, principal=principal))
+    session.commit()
+    return response
+
+
+@router.post("/requests/{request_id}/close", response_model=SchedulingStatusResponse)
+def api_close_scheduling_request(
+    request_id: str,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> SchedulingStatusResponse:
+    _require_scope(principal, WRITE_SCOPE)
+    try:
+        request = close_scheduling_request(session, tenant_id=principal.tenant_id, request_id=request_id)
+    except SchedulingError as exc:
+        raise _scheduling_http_error(exc) from exc
+    response = SchedulingStatusResponse(request=_request_response(request, principal=principal))
+    session.commit()
+    return response
+
+
+@router.post("/requests/{request_id}/decide", response_model=SchedulingStatusResponse)
+def api_decide_scheduling_request(
+    request_id: str,
+    payload: SchedulingDecisionRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> SchedulingStatusResponse:
+    _require_scope(principal, WRITE_SCOPE)
+    try:
+        request = decide_scheduling_request(
+            session,
+            tenant_id=principal.tenant_id,
+            request_id=request_id,
+            payload=payload,
+            user_id=principal.account_id,
+            allow_calendar_handoff=has_scope(
+                principal,
+                CALENDAR_EVENT_WRITE_SCOPE,
+            ),
+        )
+    except SchedulingError as exc:
+        raise _scheduling_http_error(exc) from exc
+    response = SchedulingStatusResponse(request=_request_response(request, principal=principal))
+    session.commit()
+    return response
+
+
+@router.post("/requests/{request_id}/calendar/freebusy", response_model=SchedulingCalendarActionResponse)
+def api_evaluate_calendar_freebusy(
+    request_id: str,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> SchedulingCalendarActionResponse:
+    _require_scope(principal, WRITE_SCOPE)
+    _require_scope(principal, CALENDAR_AVAILABILITY_READ_SCOPE)
+    try:
+        request, warnings = evaluate_calendar_freebusy(session, tenant_id=principal.tenant_id, request_id=request_id)
+    except SchedulingError as exc:
+        raise _scheduling_http_error(exc) from exc
+    response = SchedulingCalendarActionResponse(
+        request=_request_response(request, principal=principal),
+        updated_slot_ids=[slot.id for slot in request.slots if slot.freebusy_checked_at is not None],
+        warnings=warnings,
+    )
+    session.commit()
+    return response
+
+
+@router.post("/requests/{request_id}/calendar/holds", response_model=SchedulingCalendarActionResponse)
+def api_create_tentative_calendar_holds(
+    request_id: str,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> SchedulingCalendarActionResponse:
+    _require_scope(principal, WRITE_SCOPE)
+    _require_scope(principal, CALENDAR_EVENT_WRITE_SCOPE)
+    try:
+        request, created_event_ids, warnings = create_tentative_calendar_holds(
+            session,
+            tenant_id=principal.tenant_id,
+            user_id=principal.account_id,
+            request_id=request_id,
+        )
+    except SchedulingError as exc:
+        raise _scheduling_http_error(exc) from exc
+    response = SchedulingCalendarActionResponse(
+        request=_request_response(request, principal=principal),
+        created_event_ids=created_event_ids,
+        updated_slot_ids=[slot.id for slot in request.slots if slot.tentative_hold_event_id in created_event_ids],
+        warnings=warnings,
+    )
+    session.commit()
+    return response
+
+
+@router.post("/requests/{request_id}/calendar/event", response_model=SchedulingCalendarActionResponse)
+def api_create_final_calendar_event(
+    request_id: str,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> SchedulingCalendarActionResponse:
+    _require_scope(principal, WRITE_SCOPE)
+    _require_scope(principal, CALENDAR_EVENT_WRITE_SCOPE)
+    try:
+        request, event_id, warnings = create_final_calendar_event(
+            session,
+            tenant_id=principal.tenant_id,
+            user_id=principal.account_id,
+            request_id=request_id,
+        )
+    except SchedulingError as exc:
+        raise _scheduling_http_error(exc) from exc
+    response = SchedulingCalendarActionResponse(
+        request=_request_response(request, principal=principal),
+        created_event_ids=[event_id] if event_id else [],
+        warnings=warnings,
+    )
+    session.commit()
+    return response
+
+
+@router.post("/requests/{request_id}/cancel", response_model=SchedulingStatusResponse)
+def api_cancel_scheduling_request(
+    request_id: str,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> SchedulingStatusResponse:
+    _require_scope(principal, WRITE_SCOPE)
+    try:
+        request = cancel_scheduling_request(session, tenant_id=principal.tenant_id, request_id=request_id)
+    except SchedulingError as exc:
+        raise _scheduling_http_error(exc) from exc
+    response = SchedulingStatusResponse(request=_request_response(request, principal=principal))
+    session.commit()
+    return response
+
+
+@router.get("/requests/{request_id}/summary", response_model=SchedulingSummaryResponse)
+def api_scheduling_summary(
+    request_id: str,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> SchedulingSummaryResponse:
+    _require_scope(principal, READ_SCOPE)
+    try:
+        request = get_visible_scheduling_request(
+            session,
+            tenant_id=principal.tenant_id,
+            request_id=request_id,
+            actor_ids=_principal_actor_ids(principal),
+            can_manage=_can_manage_scheduling(principal),
+        )
+        require_visible_scheduling_results(
+            session,
+            request=request,
+            actor_ids=_principal_actor_ids(principal),
+            can_manage=_can_manage_scheduling(principal),
+        )
+        summary = scheduling_request_summary(session, tenant_id=principal.tenant_id, request_id=request_id)
+    except SchedulingError as exc:
+        raise _scheduling_http_error(exc) from exc
+    response = SchedulingSummaryResponse(
+        request=_request_response(request, principal=principal),
+        poll_summary=SchedulingPollSummaryResponse.model_validate(summary),
+    )
+    # Refreshing the summary synchronizes participant response state and can
+    # enqueue response notifications, so persist that work before teardown.
+    session.commit()
+    return response
+
+
+@router.get("/notifications", response_model=SchedulingNotificationListResponse)
+def api_list_scheduling_notifications(
+    request_id: str | None = None,
+    status_filter: str | None = Query(default=None, alias="status"),
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> SchedulingNotificationListResponse:
+    _require_scope(principal, READ_SCOPE)
+    notifications = list_visible_scheduling_notifications(
+        session,
+        tenant_id=principal.tenant_id,
+        actor_ids=_principal_actor_ids(principal),
+        can_manage=_can_manage_scheduling(principal),
+        request_id=request_id,
+        status=status_filter,
+    )
+    return SchedulingNotificationListResponse(
+        notifications=[
+            SchedulingNotificationResponse.model_validate(scheduling_notification_response(notification))
+            for notification in notifications
+        ]
+    )
+
+
+@router.post("/requests/{request_id}/notifications", response_model=SchedulingNotificationListResponse)
+def api_create_scheduling_notifications(
+    request_id: str,
+    payload: SchedulingNotificationCreateRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> SchedulingNotificationListResponse:
+    _require_scope(principal, WRITE_SCOPE)
+    try:
+        notifications = create_scheduling_notification_jobs(
+            session,
+            tenant_id=principal.tenant_id,
+            request_id=request_id,
+            event_kind=payload.event_kind,
+            channel=payload.channel,
+            metadata=payload.metadata,
+        )
+    except SchedulingError as exc:
+        raise _scheduling_http_error(exc) from exc
+    response = SchedulingNotificationListResponse(
+        notifications=[
+            SchedulingNotificationResponse.model_validate(scheduling_notification_response(notification))
+            for notification in notifications
+        ]
+    )
+    session.commit()
+    return response

src/govoplan_scheduling/backend/runtime.py

@@ -0,0 +1,20 @@
+from __future__ import annotations
+
+_runtime_registry: object | None = None
+_runtime_settings: object | None = None
+
+
+def configure_runtime(*, registry: object | None = None, settings: object | None = None) -> None:
+    global _runtime_registry, _runtime_settings
+    if registry is not None:
+        _runtime_registry = registry
+    if settings is not None:
+        _runtime_settings = settings
+
+
+def get_registry() -> object | None:
+    return _runtime_registry
+
+
+def get_settings() -> object | None:
+    return _runtime_settings

src/govoplan_scheduling/backend/schemas.py

@@ -0,0 +1,339 @@
+from __future__ import annotations
+
+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
+
+
+SchedulingStatus = Literal["draft", "collecting", "closed", "decided", "handed_off", "cancelled", "archived"]
+SchedulingParticipantType = Literal["internal", "external", "resource"]
+SchedulingParticipantStatus = Literal["draft", "invited", "responded", "declined", "removed"]
+SchedulingResultVisibility = Literal["organizer", "after_response", "after_close", "public"]
+SchedulingAvailabilityValue = Literal["available", "maybe", "unavailable"]
+SchedulingParticipantVisibility = Literal["aggregates_only", "names_and_statuses"]
+
+
+def _known_timezone(value: str | None) -> str | None:
+    if value is None:
+        return None
+    try:
+        ZoneInfo(value)
+    except ZoneInfoNotFoundError as exc:
+        raise ValueError("timezone must be a valid IANA timezone") from exc
+    return value
+
+
+class SchedulingCalendarPreferences(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    enabled: bool = False
+    calendar_id: str | None = Field(default=None, max_length=36)
+    freebusy_enabled: bool = False
+    tentative_holds_enabled: bool = False
+    create_event_on_decision: bool = False
+
+
+class SchedulingCandidateSlotInput(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    label: str | None = Field(default=None, max_length=500)
+    description: str | None = None
+    start_at: AwareDatetime
+    end_at: AwareDatetime
+    timezone: str | None = Field(default=None, max_length=100)
+    location: str | None = Field(default=None, max_length=500)
+    metadata: dict[str, Any] = Field(default_factory=dict)
+
+    _validate_timezone = field_validator("timezone")(_known_timezone)
+
+    @model_validator(mode="after")
+    def validate_range(self) -> "SchedulingCandidateSlotInput":
+        if self.end_at <= self.start_at:
+            raise ValueError("end_at must be after start_at")
+        return self
+
+
+class SchedulingCandidateSlotUpdateRequest(BaseModel):
+    """Partial update of one candidate slot.
+
+    A semantic option change invalidates existing answers for this slot in the
+    backing Poll. Exact repeats are safe no-ops.
+    """
+
+    model_config = ConfigDict(extra="forbid")
+
+    label: str | None = Field(default=None, min_length=1, max_length=500)
+    description: str | None = None
+    start_at: AwareDatetime | None = None
+    end_at: AwareDatetime | None = None
+    timezone: str | None = Field(default=None, min_length=1, max_length=100)
+    location: str | None = Field(default=None, max_length=500)
+    metadata: dict[str, Any] | None = None
+
+    _validate_timezone = field_validator("timezone")(_known_timezone)
+
+    @model_validator(mode="after")
+    def validate_range(self) -> "SchedulingCandidateSlotUpdateRequest":
+        if self.start_at is not None and self.end_at is not None and self.end_at <= self.start_at:
+            raise ValueError("end_at must be after start_at")
+        return self
+
+
+class SchedulingParticipantInput(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    respondent_id: str | None = Field(default=None, max_length=255)
+    display_name: str | None = Field(default=None, max_length=500)
+    email: str | None = Field(default=None, max_length=320)
+    participant_type: SchedulingParticipantType = "external"
+    required: bool = True
+    metadata: dict[str, Any] = Field(default_factory=dict)
+
+
+class SchedulingRequestCreateRequest(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    title: str = Field(min_length=1, max_length=500)
+    description: str | None = None
+    location: str | None = Field(default=None, max_length=500)
+    timezone: str = Field(default="UTC", max_length=100)
+    status: Literal["draft", "collecting"] = "draft"
+    deadline_at: datetime | None = None
+    allow_external_participants: bool = True
+    allow_participant_updates: bool = True
+    result_visibility: SchedulingResultVisibility = "after_close"
+    participant_visibility: SchedulingParticipantVisibility = "aggregates_only"
+    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
+    metadata: dict[str, Any] = Field(default_factory=dict)
+
+    _validate_timezone = field_validator("timezone")(_known_timezone)
+
+
+class SchedulingRequestUpdateRequest(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    title: str | None = Field(default=None, min_length=1, max_length=500)
+    description: str | None = None
+    location: str | None = Field(default=None, max_length=500)
+    deadline_at: datetime | None = None
+    allow_external_participants: bool | None = None
+    allow_participant_updates: bool | None = None
+    result_visibility: SchedulingResultVisibility | None = None
+    participant_visibility: SchedulingParticipantVisibility | None = None
+    calendar: SchedulingCalendarPreferences | None = None
+    metadata: dict[str, Any] | None = None
+
+
+class SchedulingCandidateSlotResponse(BaseModel):
+    id: str
+    poll_option_id: str | None = None
+    label: str
+    description: str | None = None
+    start_at: datetime
+    end_at: datetime
+    timezone: str
+    location: str | None = None
+    position: int
+    revision: str
+    freebusy_checked_at: datetime | None = None
+    freebusy_status: str | None = None
+    freebusy_conflicts: list[dict[str, Any]] = Field(default_factory=list)
+    tentative_hold_event_id: str | None = None
+    metadata: dict[str, Any] = Field(default_factory=dict)
+
+
+class SchedulingParticipantResponse(BaseModel):
+    id: str
+    respondent_id: str | None = None
+    display_name: str | None = None
+    email: str | None = None
+    participant_type: str
+    required: bool
+    status: str
+    poll_invitation_id: str | None = None
+    invitation_token: str | None = None
+    last_invited_at: datetime | None = None
+    responded_at: datetime | None = None
+    metadata: dict[str, Any] = Field(default_factory=dict)
+
+
+class SchedulingParticipantAggregateResponse(BaseModel):
+    total: int = 0
+    status_counts: dict[str, int] = Field(default_factory=dict)
+
+
+class SchedulingParticipantVisibilityDecisionResponse(BaseModel):
+    requested_visibility: SchedulingParticipantVisibility
+    effective_visibility: SchedulingParticipantVisibility
+    policy_applied: bool = False
+    reason: str | None = None
+    source_path: list[dict[str, Any]] = Field(default_factory=list)
+    details: dict[str, Any] = Field(default_factory=dict)
+
+
+class SchedulingRequestResponse(BaseModel):
+    id: str
+    tenant_id: str
+    title: str
+    description: str | None = None
+    location: str | None = None
+    timezone: str
+    status: str
+    poll_id: str | None = None
+    selected_slot_id: str | None = None
+    organizer_user_id: str | None = None
+    deadline_at: datetime | None = None
+    allow_external_participants: bool
+    allow_participant_updates: bool
+    result_visibility: str
+    participant_visibility: SchedulingParticipantVisibility
+    effective_participant_visibility: SchedulingParticipantVisibility
+    participant_aggregate: SchedulingParticipantAggregateResponse
+    participant_visibility_decision: SchedulingParticipantVisibilityDecisionResponse
+    calendar_integration_enabled: bool
+    calendar_id: str | None = None
+    calendar_freebusy_enabled: bool
+    calendar_hold_enabled: bool
+    create_calendar_event_on_decision: bool
+    calendar_event_id: str | None = None
+    handed_off_at: datetime | None = None
+    cancelled_at: datetime | None = None
+    created_at: datetime
+    updated_at: datetime
+    metadata: dict[str, Any] = Field(default_factory=dict)
+    slots: list[SchedulingCandidateSlotResponse] = Field(default_factory=list)
+    participants: list[SchedulingParticipantResponse] = Field(default_factory=list)
+
+
+class SchedulingRequestListResponse(BaseModel):
+    requests: list[SchedulingRequestResponse] = Field(default_factory=list)
+
+
+class SchedulingStatusResponse(BaseModel):
+    request: SchedulingRequestResponse
+
+
+class SchedulingDecisionRequest(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    slot_id: str | None = None
+    poll_option_id: str | None = None
+    handoff_to_calendar: bool | None = None
+
+
+class SchedulingAvailabilityAnswerInput(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    slot_id: str
+    value: SchedulingAvailabilityValue
+    option_revision: str = Field(min_length=64, max_length=64, pattern=r"^[0-9a-f]{64}$")
+
+
+class SchedulingAvailabilityResponseRequest(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    answers: list[SchedulingAvailabilityAnswerInput] = Field(min_length=1)
+
+    @model_validator(mode="after")
+    def validate_unique_slots(self) -> "SchedulingAvailabilityResponseRequest":
+        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 SchedulingAvailabilityAnswerResponse(BaseModel):
+    slot_id: str
+    value: SchedulingAvailabilityValue
+
+
+class SchedulingAvailabilityResponse(BaseModel):
+    request_id: str
+    participant_id: str
+    has_response: bool = False
+    submitted_at: datetime | None = None
+    answers: list[SchedulingAvailabilityAnswerResponse] = Field(default_factory=list)
+
+
+class SchedulingPollOptionResultResponse(BaseModel):
+    option_id: str
+    option_key: str
+    label: str
+    count: int = 0
+    score: int = 0
+    values: dict[str, int] = Field(default_factory=dict)
+    ranks: dict[int, int] = Field(default_factory=dict)
+
+
+class SchedulingPollSummaryResponse(BaseModel):
+    poll_id: str
+    kind: str
+    status: str
+    response_count: int
+    option_results: list[SchedulingPollOptionResultResponse] = Field(default_factory=list)
+    leading_option_ids: list[str] = Field(default_factory=list)
+
+
+class SchedulingSummaryResponse(BaseModel):
+    request: SchedulingRequestResponse
+    poll_summary: SchedulingPollSummaryResponse
+
+
+class SchedulingCalendarActionResponse(BaseModel):
+    request: SchedulingRequestResponse
+    created_event_ids: list[str] = Field(default_factory=list)
+    updated_slot_ids: list[str] = Field(default_factory=list)
+    warnings: list[str] = Field(default_factory=list)
+
+
+class SchedulingNotificationResponse(BaseModel):
+    id: str
+    request_id: str
+    participant_id: str | None = None
+    event_kind: str
+    channel: str
+    recipient: str | None = None
+    status: str
+    payload: dict[str, Any] = Field(default_factory=dict)
+    error: str | None = None
+    sent_at: datetime | None = None
+    created_at: datetime
+    updated_at: datetime
+    metadata: dict[str, Any] = Field(default_factory=dict)
+
+
+class SchedulingNotificationListResponse(BaseModel):
+    notifications: list[SchedulingNotificationResponse] = Field(default_factory=list)
+
+
+class SchedulingNotificationCreateRequest(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    event_kind: Literal["invitation", "reminder", "decision", "cancellation"]
+    channel: str = Field(default="mail", max_length=40)
+    metadata: dict[str, Any] = Field(default_factory=dict)
+
+
+class SchedulingAddressLookupCandidate(BaseModel):
+    contact_id: str
+    address_book_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_revision: str | None = None
+    provenance: dict[str, Any] = Field(default_factory=dict)
+
+
+class SchedulingAddressLookupResponse(BaseModel):
+    available: bool = False
+    candidates: list[SchedulingAddressLookupCandidate] = Field(default_factory=list)

src/govoplan_scheduling/py.typed

@@ -0,0 +1 @@
+

tests/test_manifest.py

@@ -0,0 +1,43 @@
+from __future__ import annotations
+
+import unittest
+
+from govoplan_core.core.modules import ModuleManifest
+from govoplan_scheduling.backend.manifest import get_manifest
+
+
+class SchedulingManifestTests(unittest.TestCase):
+    def test_manifest_contract(self) -> None:
+        manifest = get_manifest()
+
+        self.assertIsInstance(manifest, ModuleManifest)
+        self.assertEqual(manifest.id, "scheduling")
+        self.assertIn("poll", manifest.dependencies)
+        self.assertNotIn("access", manifest.dependencies)
+        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.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("evaluation", manifest.optional_dependencies)
+        self.assertIsNotNone(manifest.route_factory)
+        self.assertIsNotNone(manifest.migration_spec)
+        self.assertIsNotNone(manifest.frontend)
+        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("notifications.dispatch", {interface.name for interface in manifest.requires_interfaces})
+        self.assertIn("addresses.lookup", {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)
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_migrations.py

@@ -0,0 +1,224 @@
+from __future__ import annotations
+
+import tempfile
+import unittest
+from datetime import datetime
+from pathlib import Path
+
+from alembic.runtime.migration import MigrationContext
+from sqlalchemy import create_engine, func, inspect, select, text
+from sqlalchemy.orm import Session
+
+from govoplan_core.db.migrations import migrate_database
+from govoplan_poll.backend.manifest import get_manifest as get_poll_manifest
+from govoplan_scheduling.backend.db.models import (
+    SchedulingCandidateSlot,
+    SchedulingNotification,
+    SchedulingParticipant,
+    SchedulingRequest,
+)
+from govoplan_scheduling.backend.manifest import get_manifest as get_scheduling_manifest
+
+
+_SCHEDULING_HEAD = "9c2f4a7d1e6b"
+_ENABLED_MODULES = ("poll", "scheduling")
+_MANIFEST_FACTORIES = (get_poll_manifest, get_scheduling_manifest)
+
+
+class SchedulingMigrationTests(unittest.TestCase):
+    def _migrate(self, url: str) -> None:
+        migrate_database(
+            database_url=url,
+            enabled_modules=_ENABLED_MODULES,
+            manifest_factories=_MANIFEST_FACTORIES,
+        )
+
+    @staticmethod
+    def _remove_scheduling_revision(
+        connection, *, remove_privacy_column: bool = True
+    ) -> None:
+        connection.execute(
+            text("DELETE FROM alembic_version WHERE version_num = :revision"),
+            {"revision": _SCHEDULING_HEAD},
+        )
+        if remove_privacy_column:
+            connection.execute(
+                text(
+                    "ALTER TABLE scheduling_requests DROP COLUMN participant_visibility"
+                )
+            )
+
+    @staticmethod
+    def _seed_scheduling_rows(engine) -> None:
+        with Session(engine) as session:
+            request = SchedulingRequest(
+                id="request-1",
+                tenant_id="tenant-1",
+                title="Migration adoption probe",
+            )
+            request.slots.append(
+                SchedulingCandidateSlot(
+                    id="slot-1",
+                    tenant_id="tenant-1",
+                    label="First slot",
+                    start_at=datetime(2026, 7, 21, 8, 0),
+                    end_at=datetime(2026, 7, 21, 9, 0),
+                )
+            )
+            request.participants.append(
+                SchedulingParticipant(
+                    id="participant-1",
+                    tenant_id="tenant-1",
+                    display_name="Ada",
+                    email="ada@example.test",
+                )
+            )
+            session.add(request)
+            session.flush()
+            session.add(
+                SchedulingNotification(
+                    id="notification-1",
+                    tenant_id="tenant-1",
+                    request_id=request.id,
+                    event_kind="invitation",
+                    recipient="ada@example.test",
+                )
+            )
+            session.commit()
+
+    def test_adopts_complete_unversioned_v018_schema_and_preserves_rows(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:
+                    self._remove_scheduling_revision(connection)
+
+                self._migrate(url)
+
+                with engine.connect() as connection:
+                    heads = set(
+                        MigrationContext.configure(connection).get_current_heads()
+                    )
+                    columns = {
+                        item["name"]
+                        for item in inspect(connection).get_columns(
+                            "scheduling_requests"
+                        )
+                    }
+                    visibility = connection.execute(
+                        text(
+                            "SELECT participant_visibility FROM scheduling_requests "
+                            "WHERE id = 'request-1'"
+                        )
+                    ).scalar_one()
+                    counts = {
+                        model.__tablename__: connection.execute(
+                            select(func.count()).select_from(model)
+                        ).scalar_one()
+                        for model in (
+                            SchedulingRequest,
+                            SchedulingCandidateSlot,
+                            SchedulingParticipant,
+                            SchedulingNotification,
+                        )
+                    }
+
+                self.assertIn(_SCHEDULING_HEAD, heads)
+                self.assertIn("participant_visibility", columns)
+                self.assertEqual(visibility, "aggregates_only")
+                self.assertEqual(set(counts.values()), {1})
+            finally:
+                engine.dispose()
+
+    def test_adopts_already_present_compatible_privacy_column(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
+                    )
+
+                self._migrate(url)
+
+                with engine.connect() as connection:
+                    heads = set(
+                        MigrationContext.configure(connection).get_current_heads()
+                    )
+                    matching_columns = [
+                        item
+                        for item in inspect(connection).get_columns(
+                            "scheduling_requests"
+                        )
+                        if item["name"] == "participant_visibility"
+                    ]
+
+                self.assertIn(_SCHEDULING_HEAD, heads)
+                self.assertEqual(len(matching_columns), 1)
+            finally:
+                engine.dispose()
+
+    def test_rejects_incomplete_existing_baseline(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)
+                    connection.execute(text("DROP INDEX ix_scheduling_requests_status"))
+
+                with self.assertRaisesRegex(
+                    RuntimeError,
+                    "scheduling_requests missing indexes: ix_scheduling_requests_status",
+                ):
+                    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_calendar_extension(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)
+                    connection.execute(text("DROP TABLE scheduling_notifications"))
+
+                with self.assertRaisesRegex(
+                    RuntimeError,
+                    "missing table: scheduling_notifications",
+                ):
+                    self._migrate(url)
+
+                with engine.connect() as connection:
+                    heads = set(
+                        MigrationContext.configure(connection).get_current_heads()
+                    )
+                self.assertNotIn(_SCHEDULING_HEAD, heads)
+            finally:
+                engine.dispose()
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_participant_privacy.py

@@ -0,0 +1,244 @@
+from __future__ import annotations
+
+import unittest
+
+from sqlalchemy import create_engine
+from sqlalchemy.orm import Session, sessionmaker
+
+from govoplan_core.core.modules import ModuleContext, ModuleManifest
+from govoplan_core.core.policy import (
+    CAPABILITY_POLICY_SCHEDULING_PARTICIPANT_PRIVACY,
+    PolicySourceStep,
+    SchedulingParticipantPrivacyDecision,
+    SchedulingParticipantPrivacyRequest,
+)
+from govoplan_core.core.registry import PlatformRegistry
+from govoplan_core.db.base import Base
+from govoplan_scheduling.backend.db.models import (
+    SchedulingCandidateSlot,
+    SchedulingParticipant,
+    SchedulingRequest,
+)
+from govoplan_scheduling.backend.runtime import configure_runtime
+from govoplan_scheduling.backend.schemas import (
+    SchedulingCandidateSlotInput,
+    SchedulingRequestCreateRequest,
+    SchedulingRequestResponse,
+    SchedulingRequestUpdateRequest,
+)
+from govoplan_scheduling.backend.service import scheduling_request_response
+
+
+class _PrivacyPolicy:
+    def __init__(self, effective_visibility: str) -> None:
+        self.effective_visibility = effective_visibility
+        self.requests: list[SchedulingParticipantPrivacyRequest] = []
+
+    def resolve_scheduling_participant_visibility(
+        self,
+        session: object,
+        *,
+        request: SchedulingParticipantPrivacyRequest,
+    ) -> SchedulingParticipantPrivacyDecision:
+        self.requests.append(request)
+        return SchedulingParticipantPrivacyDecision(
+            effective_visibility=self.effective_visibility,  # type: ignore[arg-type]
+            reason="Tenant participant privacy policy",
+            source_path=(
+                PolicySourceStep(
+                    scope_type="tenant",
+                    scope_id=request.tenant_id,
+                    label="Tenant",
+                    applied_fields=("scheduling_participant_visibility",),
+                ),
+            ),
+            details={"provider_session_available": session is not None},
+        )
+
+
+class SchedulingParticipantPrivacyTests(unittest.TestCase):
+    def setUp(self) -> None:
+        configure_runtime(registry=PlatformRegistry())
+        self.engine = create_engine("sqlite:///:memory:")
+        Base.metadata.create_all(
+            self.engine,
+            tables=[
+                SchedulingRequest.__table__,
+                SchedulingCandidateSlot.__table__,
+                SchedulingParticipant.__table__,
+            ],
+        )
+        self.Session = sessionmaker(bind=self.engine)
+        self.session: Session = self.Session()
+
+    def tearDown(self) -> None:
+        self.session.close()
+        Base.metadata.drop_all(
+            self.engine,
+            tables=[
+                SchedulingParticipant.__table__,
+                SchedulingCandidateSlot.__table__,
+                SchedulingRequest.__table__,
+            ],
+        )
+        self.engine.dispose()
+        configure_runtime(registry=PlatformRegistry())
+
+    def _request(self, *, participant_visibility: str | None = None) -> SchedulingRequest:
+        values = {
+            "tenant_id": "tenant-1",
+            "title": "Privacy review",
+            "status": "collecting",
+            "organizer_user_id": "organizer-1",
+        }
+        if participant_visibility is not None:
+            values["participant_visibility"] = participant_visibility
+        request = SchedulingRequest(**values)
+        request.participants = [
+            SchedulingParticipant(
+                tenant_id="tenant-1",
+                respondent_id="alice-id",
+                display_name="Alice",
+                email="alice@example.test",
+                participant_type="internal",
+                status="responded",
+                metadata_={"private": "alice"},
+            ),
+            SchedulingParticipant(
+                tenant_id="tenant-1",
+                respondent_id="bob-id",
+                display_name="Bob",
+                email="bob@example.test",
+                participant_type="external",
+                status="invited",
+                metadata_={"private": "bob"},
+            ),
+        ]
+        self.session.add(request)
+        self.session.flush()
+        return request
+
+    @staticmethod
+    def _participant_projection(request: SchedulingRequest) -> dict[str, object]:
+        return scheduling_request_response(
+            request,
+            actor_ids=("alice-id", "alice@example.test"),
+            actor_user_id="alice-account",
+        )
+
+    @staticmethod
+    def _configure_policy(provider: _PrivacyPolicy) -> None:
+        registry = PlatformRegistry()
+        registry.register(
+            ModuleManifest(
+                id="policy_test",
+                name="Policy test",
+                version="test",
+                capability_factories={
+                    CAPABILITY_POLICY_SCHEDULING_PARTICIPANT_PRIVACY: lambda context: provider,
+                },
+            )
+        )
+        registry.configure_capability_context(ModuleContext(registry=registry, settings=object()))
+        configure_runtime(registry=registry)
+
+    def test_secure_default_returns_own_row_and_aggregate_counts(self) -> None:
+        request = self._request()
+
+        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")
+        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)
+
+    def test_configured_roster_returns_other_names_and_statuses_with_sensitive_fields_redacted(self) -> None:
+        request = self._request(participant_visibility="names_and_statuses")
+
+        response = SchedulingRequestResponse.model_validate(self._participant_projection(request))
+
+        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.assertEqual(own.email, "alice@example.test")
+        self.assertEqual(other.status, "invited")
+        self.assertIsNone(other.respondent_id)
+        self.assertIsNone(other.email)
+        self.assertIsNone(other.poll_invitation_id)
+        self.assertEqual(other.metadata, {})
+
+    def test_manager_and_organizer_bypass_participant_roster_restriction(self) -> None:
+        request = self._request()
+
+        manager = SchedulingRequestResponse.model_validate(
+            scheduling_request_response(
+                request,
+                actor_ids=("manager-1",),
+                actor_user_id="manager-1",
+                can_manage=True,
+            )
+        )
+        organizer = SchedulingRequestResponse.model_validate(
+            scheduling_request_response(
+                request,
+                actor_ids=("organizer-1",),
+                actor_user_id="organizer-1",
+            )
+        )
+
+        for response in (manager, organizer):
+            self.assertEqual(response.effective_participant_visibility, "names_and_statuses")
+            self.assertEqual({participant.email for participant in response.participants}, {
+                "alice@example.test",
+                "bob@example.test",
+            })
+            self.assertTrue(response.participant_visibility_decision.details["management_access"])
+
+    def test_optional_policy_can_reduce_but_cannot_broaden_visibility(self) -> None:
+        restricting_policy = _PrivacyPolicy("aggregates_only")
+        self._configure_policy(restricting_policy)
+        visible_request = self._request(participant_visibility="names_and_statuses")
+
+        reduced = SchedulingRequestResponse.model_validate(self._participant_projection(visible_request))
+
+        self.assertEqual(reduced.effective_participant_visibility, "aggregates_only")
+        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(restricting_policy.requests[0].actor_user_id, "alice-account")
+
+        widening_policy = _PrivacyPolicy("names_and_statuses")
+        self._configure_policy(widening_policy)
+        private_request = self._request()
+
+        clamped = SchedulingRequestResponse.model_validate(self._participant_projection(private_request))
+
+        self.assertEqual(clamped.effective_participant_visibility, "aggregates_only")
+        self.assertEqual([participant.display_name for participant in clamped.participants], ["Alice"])
+        self.assertEqual(widening_policy.requests[0].requested_visibility, "aggregates_only")
+
+    def test_create_and_update_schemas_expose_the_configuration(self) -> None:
+        slot = SchedulingCandidateSlotInput.model_validate(
+            {
+                "start_at": "2026-07-20T09:00:00Z",
+                "end_at": "2026-07-20T10:00:00Z",
+            }
+        )
+
+        created = SchedulingRequestCreateRequest(title="Privacy", slots=[slot])
+        updated = SchedulingRequestUpdateRequest(participant_visibility="names_and_statuses")
+
+        self.assertEqual(created.participant_visibility, "aggregates_only")
+        self.assertEqual(updated.participant_visibility, "names_and_statuses")
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_response_editing.py

@@ -0,0 +1,381 @@
+from __future__ import annotations
+
+import unittest
+from datetime import datetime, timedelta, timezone
+from types import SimpleNamespace
+
+from fastapi import HTTPException
+from pydantic import ValidationError
+from sqlalchemy import create_engine
+from sqlalchemy.orm import Session, sessionmaker
+
+from govoplan_core.auth import ApiPrincipal
+from govoplan_core.core.access import PrincipalRef
+from govoplan_core.core.modules import ModuleContext
+from govoplan_core.core.registry import PlatformRegistry
+from govoplan_core.db.base import Base
+from govoplan_poll.backend.db.models import Poll, PollInvitation, PollOption, PollResponse
+from govoplan_poll.backend.manifest import get_manifest as get_poll_manifest
+from govoplan_scheduling.backend.db.models import (
+    SchedulingCandidateSlot,
+    SchedulingNotification,
+    SchedulingParticipant,
+    SchedulingRequest,
+)
+from govoplan_scheduling.backend.manifest import RESPOND_SCOPE, WRITE_SCOPE
+from govoplan_scheduling.backend.router import (
+    api_get_my_scheduling_availability,
+    api_submit_scheduling_availability,
+    api_update_scheduling_candidate_slot,
+)
+from govoplan_scheduling.backend.runtime import configure_runtime
+from govoplan_scheduling.backend.schemas import (
+    SchedulingAvailabilityAnswerInput,
+    SchedulingAvailabilityResponseRequest,
+    SchedulingCalendarPreferences,
+    SchedulingCandidateSlotInput,
+    SchedulingCandidateSlotUpdateRequest,
+    SchedulingParticipantInput,
+    SchedulingRequestCreateRequest,
+)
+from govoplan_scheduling.backend.service import (
+    SchedulingError,
+    cancel_scheduling_request,
+    create_scheduling_request,
+    scheduling_request_summary,
+    scheduling_slot_revision,
+    update_scheduling_candidate_slot,
+)
+
+
+class SchedulingResponseEditingTests(unittest.TestCase):
+    def setUp(self) -> None:
+        registry = PlatformRegistry()
+        registry.register(get_poll_manifest())
+        registry.configure_capability_context(ModuleContext(registry=registry, settings=object()))
+        configure_runtime(registry=registry)
+        self.engine = create_engine("sqlite:///:memory:")
+        Base.metadata.create_all(
+            self.engine,
+            tables=[
+                Poll.__table__,
+                PollOption.__table__,
+                PollResponse.__table__,
+                PollInvitation.__table__,
+                SchedulingRequest.__table__,
+                SchedulingCandidateSlot.__table__,
+                SchedulingParticipant.__table__,
+                SchedulingNotification.__table__,
+            ],
+        )
+        self.Session = sessionmaker(bind=self.engine)
+        self.session: Session = self.Session()
+
+    def tearDown(self) -> None:
+        self.session.close()
+        Base.metadata.drop_all(
+            self.engine,
+            tables=[
+                SchedulingNotification.__table__,
+                SchedulingParticipant.__table__,
+                SchedulingCandidateSlot.__table__,
+                SchedulingRequest.__table__,
+                PollInvitation.__table__,
+                PollResponse.__table__,
+                PollOption.__table__,
+                Poll.__table__,
+            ],
+        )
+        self.engine.dispose()
+
+    @staticmethod
+    def _principal(account_id: str, *, email: str | None, scopes: set[str]) -> ApiPrincipal:
+        return ApiPrincipal(
+            principal=PrincipalRef(
+                account_id=account_id,
+                membership_id=f"membership-{account_id}",
+                tenant_id="tenant-1",
+                email=email,
+                display_name=account_id,
+                scopes=frozenset(scopes),
+            ),
+            account=SimpleNamespace(id=account_id),
+            user=SimpleNamespace(id=f"membership-{account_id}"),
+        )
+
+    def _request(
+        self,
+        *,
+        status: str = "collecting",
+        allow_participant_updates: bool = True,
+    ) -> SchedulingRequest:
+        start = datetime(2026, 7, 20, 9, tzinfo=timezone.utc)
+        request, _tokens = create_scheduling_request(
+            self.session,
+            tenant_id="tenant-1",
+            user_id="organizer-1",
+            payload=SchedulingRequestCreateRequest(
+                title="Response editing",
+                status=status,
+                allow_participant_updates=allow_participant_updates,
+                calendar=SchedulingCalendarPreferences(),
+                slots=[
+                    SchedulingCandidateSlotInput(
+                        label="Monday",
+                        start_at=start,
+                        end_at=start + timedelta(hours=1),
+                    ),
+                    SchedulingCandidateSlotInput(
+                        label="Tuesday",
+                        start_at=start + timedelta(days=1),
+                        end_at=start + timedelta(days=1, hours=1),
+                    ),
+                ],
+                participants=[
+                    SchedulingParticipantInput(
+                        display_name="Alice",
+                        email="alice@example.test",
+                    )
+                ],
+            ),
+        )
+        return request
+
+    def _submit_both(self, request: SchedulingRequest) -> None:
+        api_submit_scheduling_availability(
+            request.id,
+            SchedulingAvailabilityResponseRequest(
+                answers=[
+                    SchedulingAvailabilityAnswerInput(
+                        slot_id=request.slots[0].id,
+                        value="available",
+                        option_revision=scheduling_slot_revision(request.slots[0]),
+                    ),
+                    SchedulingAvailabilityAnswerInput(
+                        slot_id=request.slots[1].id,
+                        value="maybe",
+                        option_revision=scheduling_slot_revision(request.slots[1]),
+                    ),
+                ]
+            ),
+            session=self.session,
+            principal=self._principal(
+                "alice-account",
+                email="alice@example.test",
+                scopes={RESPOND_SCOPE},
+            ),
+        )
+
+    def test_current_participant_response_is_prefilled_and_changed_slot_is_invalidated(self) -> None:
+        request = self._request()
+        self._submit_both(request)
+        alice = self._principal(
+            "alice-account",
+            email="alice@example.test",
+            scopes={RESPOND_SCOPE},
+        )
+
+        before = api_get_my_scheduling_availability(
+            request.id,
+            session=self.session,
+            principal=alice,
+        )
+
+        self.assertTrue(before.has_response)
+        self.assertIsNotNone(before.submitted_at)
+        self.assertEqual(before.participant_id, request.participants[0].id)
+        self.assertEqual(
+            [(answer.slot_id, answer.value) for answer in before.answers],
+            [(request.slots[0].id, "available"), (request.slots[1].id, "maybe")],
+        )
+
+        api_update_scheduling_candidate_slot(
+            request.id,
+            request.slots[0].id,
+            SchedulingCandidateSlotUpdateRequest(label="Monday, revised"),
+            session=self.session,
+            principal=self._principal("organizer-1", email=None, scopes={WRITE_SCOPE}),
+        )
+        after = api_get_my_scheduling_availability(
+            request.id,
+            session=self.session,
+            principal=alice,
+        )
+
+        self.assertTrue(after.has_response)
+        self.assertEqual(
+            [(answer.slot_id, answer.value) for answer in after.answers],
+            [(request.slots[1].id, "maybe")],
+        )
+        poll_response = self.session.query(PollResponse).filter(PollResponse.poll_id == request.poll_id).one()
+        self.assertEqual(
+            [answer["option_id"] for answer in poll_response.answers],
+            [request.slots[1].poll_option_id],
+        )
+
+        # Re-submit and repeat the exact option snapshot: an idempotent no-op
+        # must preserve both current answers.
+        self._submit_both(request)
+        api_update_scheduling_candidate_slot(
+            request.id,
+            request.slots[0].id,
+            SchedulingCandidateSlotUpdateRequest(label="Monday, revised"),
+            session=self.session,
+            principal=self._principal("organizer-1", email=None, scopes={WRITE_SCOPE}),
+        )
+        unchanged = api_get_my_scheduling_availability(
+            request.id,
+            session=self.session,
+            principal=alice,
+        )
+        self.assertEqual(len(unchanged.answers), 2)
+
+    def test_calendar_hold_rejection_leaves_slot_and_answers_unchanged(self) -> None:
+        request = self._request()
+        self._submit_both(request)
+        slot = request.slots[0]
+        original_start = slot.start_at
+        slot.tentative_hold_event_id = "event-1"
+        self.session.flush()
+
+        with self.assertRaisesRegex(SchedulingError, "tentative calendar hold"):
+            update_scheduling_candidate_slot(
+                self.session,
+                tenant_id="tenant-1",
+                request_id=request.id,
+                slot_id=slot.id,
+                payload=SchedulingCandidateSlotUpdateRequest(
+                    start_at=original_start.replace(tzinfo=timezone.utc) + timedelta(minutes=15),
+                ),
+            )
+
+        self.assertEqual(slot.start_at, original_start)
+        response = self.session.query(PollResponse).filter(PollResponse.poll_id == request.poll_id).one()
+        self.assertEqual(len(response.answers), 2)
+
+    def test_cancelling_draft_request_preserves_draft_poll(self) -> None:
+        request = self._request(status="draft")
+
+        cancelled = cancel_scheduling_request(
+            self.session,
+            tenant_id="tenant-1",
+            request_id=request.id,
+        )
+        poll = self.session.query(Poll).filter(Poll.id == request.poll_id).one()
+
+        self.assertEqual(cancelled.status, "cancelled")
+        self.assertIsNotNone(cancelled.cancelled_at)
+        self.assertEqual(poll.status, "draft")
+
+    def test_fully_invalidated_response_becomes_unanswered(self) -> None:
+        request = self._request()
+        alice = self._principal(
+            "alice-account",
+            email="alice@example.test",
+            scopes={RESPOND_SCOPE},
+        )
+        api_submit_scheduling_availability(
+            request.id,
+            SchedulingAvailabilityResponseRequest(
+                answers=[
+                    SchedulingAvailabilityAnswerInput(
+                        slot_id=request.slots[0].id,
+                        value="available",
+                        option_revision=scheduling_slot_revision(request.slots[0]),
+                    )
+                ]
+            ),
+            session=self.session,
+            principal=alice,
+        )
+
+        api_update_scheduling_candidate_slot(
+            request.id,
+            request.slots[0].id,
+            SchedulingCandidateSlotUpdateRequest(label="Monday, revised"),
+            session=self.session,
+            principal=self._principal("organizer-1", email=None, scopes={WRITE_SCOPE}),
+        )
+        current = api_get_my_scheduling_availability(
+            request.id,
+            session=self.session,
+            principal=alice,
+        )
+
+        self.assertFalse(current.has_response)
+        self.assertEqual(current.answers, [])
+        self.assertEqual(request.participants[0].status, "invited")
+        self.assertIsNone(request.participants[0].responded_at)
+        self.assertEqual(
+            scheduling_request_summary(self.session, tenant_id="tenant-1", request_id=request.id)["response_count"],
+            0,
+        )
+
+    def test_option_change_is_blocked_when_response_updates_are_disabled(self) -> None:
+        request = self._request(allow_participant_updates=False)
+        self._submit_both(request)
+        original_label = request.slots[0].label
+
+        with self.assertRaisesRegex(SchedulingError, "response updates are disabled"):
+            update_scheduling_candidate_slot(
+                self.session,
+                tenant_id="tenant-1",
+                request_id=request.id,
+                slot_id=request.slots[0].id,
+                payload=SchedulingCandidateSlotUpdateRequest(label="Monday, revised"),
+            )
+
+        self.assertEqual(request.slots[0].label, original_label)
+        response = self.session.query(PollResponse).filter(PollResponse.poll_id == request.poll_id).one()
+        self.assertEqual(len(response.answers), 2)
+
+    def test_stale_option_revision_is_rejected_without_writing_a_response(self) -> None:
+        request = self._request()
+        stale_revision = scheduling_slot_revision(request.slots[0])
+        api_update_scheduling_candidate_slot(
+            request.id,
+            request.slots[0].id,
+            SchedulingCandidateSlotUpdateRequest(label="Monday, revised"),
+            session=self.session,
+            principal=self._principal("organizer-1", email=None, scopes={WRITE_SCOPE}),
+        )
+
+        with self.assertRaises(HTTPException) as stale:
+            api_submit_scheduling_availability(
+                request.id,
+                SchedulingAvailabilityResponseRequest(
+                    answers=[
+                        SchedulingAvailabilityAnswerInput(
+                            slot_id=request.slots[0].id,
+                            value="available",
+                            option_revision=stale_revision,
+                        )
+                    ]
+                ),
+                session=self.session,
+                principal=self._principal(
+                    "alice-account",
+                    email="alice@example.test",
+                    scopes={RESPOND_SCOPE},
+                ),
+            )
+
+        self.assertEqual(stale.exception.status_code, 409)
+        self.assertEqual(self.session.query(PollResponse).filter(PollResponse.poll_id == request.poll_id).count(), 0)
+
+    def test_slot_inputs_require_aware_datetimes_and_known_timezones(self) -> None:
+        with self.assertRaises(ValidationError):
+            SchedulingCandidateSlotInput(
+                start_at=datetime(2026, 7, 20, 9),
+                end_at=datetime(2026, 7, 20, 10),
+            )
+        with self.assertRaisesRegex(ValidationError, "valid IANA timezone"):
+            SchedulingCandidateSlotInput(
+                start_at=datetime(2026, 7, 20, 9, tzinfo=timezone.utc),
+                end_at=datetime(2026, 7, 20, 10, tzinfo=timezone.utc),
+                timezone="Mars/Olympus_Mons",
+            )
+
+
+if __name__ == "__main__":
+    unittest.main()

webui/package.json

@@ -0,0 +1,35 @@
+{
+  "name": "@govoplan/scheduling-webui",
+  "version": "0.1.9",
+  "private": true,
+  "type": "module",
+  "main": "src/index.ts",
+  "module": "src/index.ts",
+  "types": "src/index.ts",
+  "exports": {
+    ".": {
+      "types": "./src/index.ts",
+      "import": "./src/index.ts"
+    },
+    "./styles/scheduling.css": "./src/styles/scheduling.css"
+  },
+  "scripts": {
+    "test:view-model": "node --experimental-strip-types --test tests/scheduling-view-model.test.ts",
+    "test:ui-structure": "node scripts/test-scheduling-page-structure.mjs"
+  },
+  "peerDependencies": {
+    "@govoplan/core-webui": "^0.1.9",
+    "lucide-react": "^1.23.0",
+    "react": "^19.0.0",
+    "react-dom": "^19.0.0",
+    "react-router-dom": "^7.1.1",
+    "@vitejs/plugin-react": "^4.3.4",
+    "typescript": "^5.7.2",
+    "vite": "^6.0.6"
+  },
+  "peerDependenciesMeta": {
+    "@govoplan/core-webui": {
+      "optional": true
+    }
+  }
+}

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

@@ -0,0 +1,71 @@
+import assert from "node:assert/strict";
+import { readFileSync } from "node:fs";
+import { fileURLToPath } from "node:url";
+
+const pagePath = fileURLToPath(new URL("../src/features/scheduling/SchedulingPage.tsx", import.meta.url));
+const apiPath = fileURLToPath(new URL("../src/api/scheduling.ts", import.meta.url));
+const page = readFileSync(pagePath, "utf8");
+const api = readFileSync(apiPath, "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.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, /title=\{I18N\.myRequests\}/);
+assert.match(page, /title=\{I18N\.invitedRequests\}/);
+assert.match(createBranch, /<Card title=\{I18N\.basicInformation\}>/);
+assert.match(createBranch, /<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, /id="scheduling-create-candidate-slots-grid"/);
+assert.match(page, /id="scheduling-create-participants-grid"/);
+assert.match(page, /id="scheduling-candidate-slots-grid"/);
+assert.match(page, /id="scheduling-participants-grid"/);
+assert.match(page, /<DataGridRowActions/);
+assert.match(page, /<DataGridEmptyAction/);
+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, /aria-label=\{i18nMessage\("i18n:govoplan-scheduling\.decide_on_value/);
+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, /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/);
+assert.match(api, /\/api\/v1\/scheduling\/requests\/\$\{requestId\}\/responses/);
+assert.match(api, /\/api\/v1\/scheduling\/requests\/\$\{requestId\}\/responses\/me/);
+
+console.log("Scheduling page structure satisfies the focused list/create/respond contract.");

webui/src/api/scheduling.ts

@@ -0,0 +1,299 @@
+import { apiFetch, type ApiSettings } from "@govoplan/core-webui";
+
+export type SchedulingStatus = "draft" | "collecting" | "closed" | "decided" | "handed_off" | "cancelled" | "archived";
+export type SchedulingParticipantVisibility = "aggregates_only" | "names_and_statuses";
+
+export type SchedulingCandidateSlot = {
+  id: string;
+  poll_option_id?: string | null;
+  label: string;
+  description?: string | null;
+  start_at: string;
+  end_at: string;
+  timezone: string;
+  location?: string | null;
+  position: number;
+  revision: string;
+  freebusy_checked_at?: string | null;
+  freebusy_status?: string | null;
+  freebusy_conflicts: Record<string, unknown>[];
+  tentative_hold_event_id?: string | null;
+  metadata?: Record<string, unknown>;
+};
+
+export type SchedulingParticipant = {
+  id: string;
+  respondent_id?: string | null;
+  display_name?: string | null;
+  email?: string | null;
+  participant_type: string;
+  required: boolean;
+  status: string;
+  poll_invitation_id?: string | null;
+  invitation_token?: string | null;
+  last_invited_at?: string | null;
+  responded_at?: string | null;
+  metadata?: Record<string, unknown>;
+};
+
+export type SchedulingParticipantAggregate = {
+  total: number;
+  status_counts: Record<string, number>;
+};
+
+export type SchedulingParticipantVisibilityDecision = {
+  requested_visibility: SchedulingParticipantVisibility;
+  effective_visibility: SchedulingParticipantVisibility;
+  policy_applied: boolean;
+  reason?: string | null;
+  source_path: Record<string, unknown>[];
+  details: Record<string, unknown>;
+};
+
+export type SchedulingRequest = {
+  id: string;
+  tenant_id: string;
+  title: string;
+  description?: string | null;
+  location?: string | null;
+  timezone: string;
+  status: SchedulingStatus;
+  poll_id?: string | null;
+  selected_slot_id?: string | null;
+  organizer_user_id?: string | null;
+  deadline_at?: string | null;
+  allow_external_participants: boolean;
+  allow_participant_updates: boolean;
+  result_visibility: string;
+  participant_visibility: SchedulingParticipantVisibility;
+  effective_participant_visibility: SchedulingParticipantVisibility;
+  participant_aggregate: SchedulingParticipantAggregate;
+  participant_visibility_decision: SchedulingParticipantVisibilityDecision;
+  calendar_integration_enabled: boolean;
+  calendar_id?: string | null;
+  calendar_freebusy_enabled: boolean;
+  calendar_hold_enabled: boolean;
+  create_calendar_event_on_decision: boolean;
+  calendar_event_id?: string | null;
+  handed_off_at?: string | null;
+  cancelled_at?: string | null;
+  created_at: string;
+  updated_at: string;
+  metadata?: Record<string, unknown>;
+  slots: SchedulingCandidateSlot[];
+  participants: SchedulingParticipant[];
+};
+
+export type SchedulingRequestListResponse = { requests: SchedulingRequest[] };
+export type SchedulingStatusResponse = { request: SchedulingRequest };
+
+export type SchedulingCandidateSlotPayload = {
+  label?: string | null;
+  description?: string | null;
+  start_at: string;
+  end_at: string;
+  timezone?: string | null;
+  location?: string | null;
+  metadata?: Record<string, unknown>;
+};
+
+export type SchedulingParticipantPayload = {
+  respondent_id?: string | null;
+  display_name?: string | null;
+  email?: string | null;
+  participant_type?: "internal" | "external" | "resource";
+  required?: boolean;
+  metadata?: Record<string, unknown>;
+};
+
+export type SchedulingRequestCreatePayload = {
+  title: string;
+  description?: string | null;
+  location?: string | null;
+  timezone?: string;
+  status?: "draft" | "collecting";
+  deadline_at?: string | null;
+  allow_external_participants?: boolean;
+  allow_participant_updates?: boolean;
+  result_visibility?: "organizer" | "after_response" | "after_close" | "public";
+  participant_visibility?: SchedulingParticipantVisibility;
+  calendar?: {
+    enabled?: boolean;
+    calendar_id?: string | null;
+    freebusy_enabled?: boolean;
+    tentative_holds_enabled?: boolean;
+    create_event_on_decision?: boolean;
+  };
+  slots: SchedulingCandidateSlotPayload[];
+  participants?: SchedulingParticipantPayload[];
+  create_participant_invitations?: boolean;
+  metadata?: Record<string, unknown>;
+};
+
+export type SchedulingDecisionPayload = {
+  slot_id?: string | null;
+  poll_option_id?: string | null;
+  handoff_to_calendar?: boolean | null;
+};
+
+export type SchedulingAvailabilityValue = "available" | "maybe" | "unavailable";
+
+export type SchedulingAvailabilityPayload = {
+  answers: Array<{
+    slot_id: string;
+    value: SchedulingAvailabilityValue;
+    option_revision: string;
+  }>;
+};
+
+export type SchedulingAvailabilityResponse = {
+  request_id: string;
+  participant_id: string;
+  has_response: boolean;
+  submitted_at?: string | null;
+  answers: Array<{
+    slot_id: string;
+    value: SchedulingAvailabilityValue;
+  }>;
+};
+
+export type SchedulingCalendarActionResponse = {
+  request: SchedulingRequest;
+  created_event_ids: string[];
+  updated_slot_ids: string[];
+  warnings: string[];
+};
+
+export type SchedulingNotification = {
+  id: string;
+  request_id: string;
+  participant_id?: string | null;
+  event_kind: string;
+  channel: string;
+  recipient?: string | null;
+  status: string;
+  payload: Record<string, unknown>;
+  error?: string | null;
+  sent_at?: string | null;
+  created_at: string;
+  updated_at: string;
+  metadata?: Record<string, unknown>;
+};
+
+export type SchedulingNotificationListResponse = { notifications: SchedulingNotification[] };
+
+export type SchedulingPollOptionResult = {
+  option_id: string;
+  option_key: string;
+  label: string;
+  count: number;
+  score: number;
+  values: Record<string, number>;
+};
+
+export type SchedulingSummaryResponse = {
+  request: SchedulingRequest;
+  poll_summary: {
+    poll_id: string;
+    kind: string;
+    status: string;
+    response_count: number;
+    option_results: SchedulingPollOptionResult[];
+    leading_option_ids: string[];
+  };
+};
+
+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[];
+};
+
+const json = (payload: unknown) => ({ method: "POST", body: JSON.stringify(payload ?? {}) });
+
+export function lookupSchedulingAddresses(settings: ApiSettings, query: string, limit = 25): Promise<SchedulingAddressLookupResponse> {
+  const params = new URLSearchParams({ query, limit: String(limit) });
+  return apiFetch<SchedulingAddressLookupResponse>(settings, `/api/v1/scheduling/address-lookup?${params.toString()}`);
+}
+
+export function listSchedulingRequests(settings: ApiSettings, status?: string): Promise<SchedulingRequestListResponse> {
+  const query = status ? `?status=${encodeURIComponent(status)}` : "";
+  return apiFetch<SchedulingRequestListResponse>(settings, `/api/v1/scheduling/requests${query}`);
+}
+
+export function createSchedulingRequest(settings: ApiSettings, payload: SchedulingRequestCreatePayload): Promise<SchedulingRequest> {
+  return apiFetch<SchedulingRequest>(settings, "/api/v1/scheduling/requests", json(payload));
+}
+
+export function submitSchedulingAvailability(
+  settings: ApiSettings,
+  requestId: string,
+  payload: SchedulingAvailabilityPayload
+): Promise<SchedulingStatusResponse> {
+  return apiFetch<SchedulingStatusResponse>(
+    settings,
+    `/api/v1/scheduling/requests/${requestId}/responses`,
+    json(payload)
+  );
+}
+
+export function getSchedulingAvailabilityResponse(
+  settings: ApiSettings,
+  requestId: string
+): Promise<SchedulingAvailabilityResponse> {
+  return apiFetch<SchedulingAvailabilityResponse>(
+    settings,
+    `/api/v1/scheduling/requests/${requestId}/responses/me`
+  );
+}
+
+export function openSchedulingRequest(settings: ApiSettings, requestId: string): Promise<SchedulingStatusResponse> {
+  return apiFetch<SchedulingStatusResponse>(settings, `/api/v1/scheduling/requests/${requestId}/open`, json({}));
+}
+
+export function closeSchedulingRequest(settings: ApiSettings, requestId: string): Promise<SchedulingStatusResponse> {
+  return apiFetch<SchedulingStatusResponse>(settings, `/api/v1/scheduling/requests/${requestId}/close`, json({}));
+}
+
+export function decideSchedulingRequest(settings: ApiSettings, requestId: string, payload: SchedulingDecisionPayload): Promise<SchedulingStatusResponse> {
+  return apiFetch<SchedulingStatusResponse>(settings, `/api/v1/scheduling/requests/${requestId}/decide`, json(payload));
+}
+
+export function evaluateSchedulingFreeBusy(settings: ApiSettings, requestId: string): Promise<SchedulingCalendarActionResponse> {
+  return apiFetch<SchedulingCalendarActionResponse>(settings, `/api/v1/scheduling/requests/${requestId}/calendar/freebusy`, json({}));
+}
+
+export function createSchedulingHolds(settings: ApiSettings, requestId: string): Promise<SchedulingCalendarActionResponse> {
+  return apiFetch<SchedulingCalendarActionResponse>(settings, `/api/v1/scheduling/requests/${requestId}/calendar/holds`, json({}));
+}
+
+export function createSchedulingCalendarEvent(settings: ApiSettings, requestId: string): Promise<SchedulingCalendarActionResponse> {
+  return apiFetch<SchedulingCalendarActionResponse>(settings, `/api/v1/scheduling/requests/${requestId}/calendar/event`, json({}));
+}
+
+export function schedulingSummary(settings: ApiSettings, requestId: string): Promise<SchedulingSummaryResponse> {
+  return apiFetch<SchedulingSummaryResponse>(settings, `/api/v1/scheduling/requests/${requestId}/summary`);
+}
+
+export function createSchedulingNotifications(settings: ApiSettings, requestId: string, eventKind: string): Promise<SchedulingNotificationListResponse> {
+  return apiFetch<SchedulingNotificationListResponse>(settings, `/api/v1/scheduling/requests/${requestId}/notifications`, json({ event_kind: eventKind }));
+}
+
+export function listSchedulingNotifications(settings: ApiSettings, requestId?: string): Promise<SchedulingNotificationListResponse> {
+  const query = requestId ? `?request_id=${encodeURIComponent(requestId)}` : "";
+  return apiFetch<SchedulingNotificationListResponse>(settings, `/api/v1/scheduling/notifications${query}`);
+}

webui/src/features/scheduling/schedulingViewModel.ts

@@ -0,0 +1,146 @@
+import type { SchedulingParticipant, SchedulingRequest } from "../../api/scheduling";
+
+export type SchedulingActor = {
+  accountId?: string | null;
+  userId?: string | null;
+  membershipId?: string | null;
+  identityId?: string | null;
+  email?: string | null;
+};
+
+export type SchedulingRequestGroups = {
+  owned: SchedulingRequest[];
+  invited: SchedulingRequest[];
+  other: SchedulingRequest[];
+};
+
+export type SchedulingSortPhase =
+  | "unanswered"
+  | "answered"
+  | "closed"
+  | "determined"
+  | "past";
+
+export function schedulingActorIds(actor: SchedulingActor): string[] {
+  return Array.from(new Set([
+    actor.accountId,
+    actor.userId,
+    actor.membershipId,
+    actor.identityId,
+    actor.email
+  ].filter((value): value is string => Boolean(value))));
+}
+
+export function schedulingParticipantForActor(
+  request: SchedulingRequest,
+  actor: SchedulingActor
+): SchedulingParticipant | null {
+  const ids = new Set(schedulingActorIds(actor));
+  return request.participants.find((participant) =>
+    Boolean(
+      (participant.respondent_id && ids.has(participant.respondent_id)) ||
+      (participant.email && ids.has(participant.email))
+    )
+  ) ?? null;
+}
+
+export function schedulingRequestIsOwned(
+  request: SchedulingRequest,
+  actor: SchedulingActor
+): boolean {
+  return Boolean(
+    request.organizer_user_id &&
+    schedulingActorIds(actor).includes(request.organizer_user_id)
+  );
+}
+
+export function schedulingSortPhase(
+  request: SchedulingRequest,
+  actor: SchedulingActor,
+  now = new Date()
+): SchedulingSortPhase {
+  if (schedulingRequestIsPast(request, now)) return "past";
+  if (["decided", "handed_off"].includes(request.status)) return "determined";
+  if (["closed", "cancelled", "archived"].includes(request.status)) return "closed";
+  if (schedulingRequestIsOwned(request, actor)) return "unanswered";
+  const participant = schedulingParticipantForActor(request, actor);
+  return participant && ["responded", "declined"].includes(participant.status)
+    ? "answered"
+    : "unanswered";
+}
+
+export function compareSchedulingRequests(
+  left: SchedulingRequest,
+  right: SchedulingRequest,
+  actor: SchedulingActor,
+  now = new Date()
+): number {
+  const leftPhase = schedulingSortPhase(left, actor, now);
+  const rightPhase = schedulingSortPhase(right, actor, now);
+  const phaseDifference = SORT_PHASE_ORDER[leftPhase] - SORT_PHASE_ORDER[rightPhase];
+  if (phaseDifference !== 0) return phaseDifference;
+  const leftDate = schedulingRelevantTimestamp(left, now);
+  const rightDate = schedulingRelevantTimestamp(right, now);
+  const dateDifference = leftPhase === "past"
+    ? rightDate - leftDate
+    : leftDate - rightDate;
+  if (dateDifference !== 0) return dateDifference;
+  const titleDifference = left.title.localeCompare(right.title);
+  return titleDifference || left.id.localeCompare(right.id);
+}
+
+export function groupSchedulingRequests(
+  requests: SchedulingRequest[],
+  actor: SchedulingActor,
+  now = new Date()
+): SchedulingRequestGroups {
+  const groups: SchedulingRequestGroups = { owned: [], invited: [], other: [] };
+  for (const request of requests) {
+    if (schedulingRequestIsOwned(request, actor)) {
+      groups.owned.push(request);
+    } else if (schedulingParticipantForActor(request, actor)) {
+      groups.invited.push(request);
+    } else {
+      groups.other.push(request);
+    }
+  }
+  for (const group of Object.values(groups)) {
+    group.sort((left, right) => compareSchedulingRequests(left, right, actor, now));
+  }
+  return groups;
+}
+
+export function schedulingRelevantTimestamp(
+  request: SchedulingRequest,
+  now = new Date()
+): number {
+  const nowValue = now.getTime();
+  const futureStarts = request.slots
+    .map((slot) => Date.parse(slot.start_at))
+    .filter((value) => Number.isFinite(value) && value >= nowValue)
+    .sort((left, right) => left - right);
+  if (futureStarts[0] !== undefined) return futureStarts[0];
+  const slotEnds = request.slots
+    .map((slot) => Date.parse(slot.end_at))
+    .filter(Number.isFinite);
+  if (slotEnds.length) return Math.max(...slotEnds);
+  const fallback = Date.parse(request.deadline_at || request.updated_at || request.created_at);
+  return Number.isFinite(fallback) ? fallback : Number.MAX_SAFE_INTEGER;
+}
+
+export function schedulingRequestIsPast(
+  request: SchedulingRequest,
+  now = new Date()
+): boolean {
+  if (!request.slots.length) return false;
+  const slotEnds = request.slots.map((slot) => Date.parse(slot.end_at));
+  return slotEnds.every((value) => Number.isFinite(value) && value < now.getTime());
+}
+
+const SORT_PHASE_ORDER: Record<SchedulingSortPhase, number> = {
+  unanswered: 0,
+  answered: 1,
+  closed: 2,
+  determined: 3,
+  past: 4
+};

webui/src/i18n/generatedTranslations.ts

@@ -0,0 +1,218 @@
+export const generatedTranslations = {
+  en: {
+    "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",
+    "i18n:govoplan-scheduling.answered.e0aafffa": "Answered",
+    "i18n:govoplan-scheduling.available.7c62a142": "Available",
+    "i18n:govoplan-scheduling.awaiting_response.ee646ea9": "Awaiting response",
+    "i18n:govoplan-scheduling.basic_information.d8bc7383": "Basic information",
+    "i18n:govoplan-scheduling.busy.592a9d16": "Busy",
+    "i18n:govoplan-scheduling.calendar.adab5090": "Calendar",
+    "i18n:govoplan-scheduling.calendar_coordination.291ab00a": "Calendar coordination",
+    "i18n:govoplan-scheduling.configured_calendar.e2e8ebd5": "Configured calendar",
+    "i18n:govoplan-scheduling.calendar_integration.181ad18b": "Calendar integration",
+    "i18n:govoplan-scheduling.calendar_integration_requires_the_calendar_module_plus_c.f892cb1e": "Calendar integration requires the Calendar module plus calendar-read, availability-read, and event-write access.",
+    "i18n:govoplan-scheduling.candidate_availability.9541c4b5": "Candidate availability",
+    "i18n:govoplan-scheduling.candidate_slots.c414946b": "Candidate slots",
+    "i18n:govoplan-scheduling.check_free_busy.e9700e00": "Check free/busy",
+    "i18n:govoplan-scheduling.choose_availability.ac95b8f6": "Choose availability",
+    "i18n:govoplan-scheduling.choose_availability_for_at_least_one_candidate_slot.28d2111f": "Choose availability for at least one candidate slot.",
+    "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",
+    "i18n:govoplan-scheduling.decision.7f59a1f1": "Decision",
+    "i18n:govoplan-scheduling.declined.ff59b80f": "Declined",
+    "i18n:govoplan-scheduling.decide_on_value.196409cd": "Decide on {value0}",
+    "i18n:govoplan-scheduling.description.55f8ebc8": "Description",
+    "i18n:govoplan-scheduling.determined.9f23293d": "Determined",
+    "i18n:govoplan-scheduling.discard.36fff63c": "Discard",
+    "i18n:govoplan-scheduling.discard_this_unsaved_scheduling_request.4a956be2": "Discard this unsaved scheduling request?",
+    "i18n:govoplan-scheduling.draft.23d33e22": "Draft",
+    "i18n:govoplan-scheduling.end.a2bb9d34": "End",
+    "i18n:govoplan-scheduling.error.7f2f6a15": "Error",
+    "i18n:govoplan-scheduling.every_candidate_slot_must_end_after_it_starts.47836010": "Every candidate slot must end after it starts.",
+    "i18n:govoplan-scheduling.failed.09fef5d8": "Failed",
+    "i18n:govoplan-scheduling.free.75f52718": "Free",
+    "i18n:govoplan-scheduling.free_busy_checks_each_candidate_slot_against_the_selecte.50f0371a": "Free/busy checks each candidate slot against the selected calendar.",
+    "i18n:govoplan-scheduling.loading_scheduling_requests.f42be95d": "Loading scheduling requests…",
+    "i18n:govoplan-scheduling.invitation.6306ef74": "Invitation",
+    "i18n:govoplan-scheduling.invited.53469df1": "Invited",
+    "i18n:govoplan-scheduling.location.d219c681": "Location",
+    "i18n:govoplan-scheduling.managed_scheduling_requests.7a45972f": "Managed scheduling requests",
+    "i18n:govoplan-scheduling.maybe.56dd8d0b": "Maybe",
+    "i18n:govoplan-scheduling.my_scheduling_requests.d28ef235": "My scheduling requests",
+    "i18n:govoplan-scheduling.name.709a2322": "Name",
+    "i18n:govoplan-scheduling.new_scheduling_request.2080f675": "New scheduling request",
+    "i18n:govoplan-scheduling.no_notifications_have_been_created.c8d43ca3": "No notifications have been created.",
+    "i18n:govoplan-scheduling.no_participants.73a89101": "No participants",
+    "i18n:govoplan-scheduling.no_requests_in_this_group.a63c1b40": "No requests in this group",
+    "i18n:govoplan-scheduling.no_scheduling_request_selected.ac940664": "No scheduling request selected",
+    "i18n:govoplan-scheduling.notifications.753a22b2": "Notifications",
+    "i18n:govoplan-scheduling.open.cf9b7706": "Open",
+    "i18n:govoplan-scheduling.open_poll.2beac9a7": "Open poll",
+    "i18n:govoplan-scheduling.open_starts_collecting_availability_responses.c8ec34e5": "Open starts collecting availability responses.",
+    "i18n:govoplan-scheduling.option_value.3f643dc0": "Option {value0}",
+    "i18n:govoplan-scheduling.other_scheduling_requests.5cb6eb30": "Other scheduling requests",
+    "i18n:govoplan-scheduling.participant_email.2cadfd9e": "Participant email",
+    "i18n:govoplan-scheduling.participant_names_and_statuses_are_hidden_aggregate_counts_r.d811a69a": "Participant names and statuses are hidden. Aggregate counts remain visible.",
+    "i18n:govoplan-scheduling.share_participant_names_and_response_statuses.df0bf9e0": "Share participant names and response statuses",
+    "i18n:govoplan-scheduling.when_enabled_participants_can_see_other_participants_names.3ac78361": "When enabled, participants can see other participants' names and response statuses. Email addresses and invitation details remain private.",
+    "i18n:govoplan-scheduling.participants.cd56e083": "Participants",
+    "i18n:govoplan-scheduling.past.405c12fb": "Past",
+    "i18n:govoplan-scheduling.pending.96f608c1": "Pending",
+    "i18n:govoplan-scheduling.queued.6a599877": "Queued",
+    "i18n:govoplan-scheduling.refresh_requests.0a3ed7a1": "Refresh requests",
+    "i18n:govoplan-scheduling.reminder_creates_a_notification_job_for_every_active_par.7ec68797": "Reminder creates a notification job for every active participant.",
+    "i18n:govoplan-scheduling.remove.e963907d": "Remove",
+    "i18n:govoplan-scheduling.remove_participant_value.e55f2b70": "Remove participant {value0}",
+    "i18n:govoplan-scheduling.remove_slot_value.3adc7576": "Remove slot {value0}",
+    "i18n:govoplan-scheduling.removed.b5e77c5c": "Removed",
+    "i18n:govoplan-scheduling.reminder.b87a1929": "Reminder",
+    "i18n:govoplan-scheduling.request_failed.9fcda32c": "Request failed",
+    "i18n:govoplan-scheduling.required.eed6bfb4": "Required",
+    "i18n:govoplan-scheduling.requires_calendar_availability_read_access.b48ed91b": "Requires Calendar availability-read access.",
+    "i18n:govoplan-scheduling.requires_calendar_event_write_access.887b0763": "Requires Calendar event-write access.",
+    "i18n:govoplan-scheduling.responses_may_be_updated_while_this_request_remains_open.4faecbbe": "Responses may be updated while this request remains open.",
+    "i18n:govoplan-scheduling.responded.4f218211": "Responded",
+    "i18n:govoplan-scheduling.save.efc007a3": "Save",
+    "i18n:govoplan-scheduling.saving.56a2285c": "Saving…",
+    "i18n:govoplan-scheduling.scheduling_requests.b3c12f4d": "Scheduling requests",
+    "i18n:govoplan-scheduling.scheduling_request_title_is_required.a27338be": "Scheduling request title is required.",
+    "i18n:govoplan-scheduling.scheduling_requests_for_me.1d521aba": "Scheduling requests for me",
+    "i18n:govoplan-scheduling.select_a_calendar.f6af95bb": "Select a calendar",
+    "i18n:govoplan-scheduling.select_a_calendar_or_turn_off_calendar_integration.cc3652a9": "Select a calendar or turn off Calendar integration.",
+    "i18n:govoplan-scheduling.send_reminder.cf5eb3bf": "Send reminder",
+    "i18n:govoplan-scheduling.sending.ceafde86": "Sending",
+    "i18n:govoplan-scheduling.sent.35f49dcf": "Sent",
+    "i18n:govoplan-scheduling.skipped.5a000ad7": "Skipped",
+    "i18n:govoplan-scheduling.start.952f3754": "Start",
+    "i18n:govoplan-scheduling.status.bae7d5be": "Status",
+    "i18n:govoplan-scheduling.submit_response.a5f0c053": "Submit response",
+    "i18n:govoplan-scheduling.tentative_holds_create_one_provisional_calendar_event_pe.ff3f1884": "Tentative holds create one provisional calendar event per candidate slot.",
+    "i18n:govoplan-scheduling.the_final_event_is_created_only_for_the_selected_slot.e3621252": "The final event is created only for the selected slot.",
+    "i18n:govoplan-scheduling.the_response_replaces_your_previous_availability_choices.74c16d53": "The response replaces your previous availability choices.",
+    "i18n:govoplan-scheduling.title.768e0c1c": "Title",
+    "i18n:govoplan-scheduling.unavailable.2c9c1f79": "Unavailable",
+    "i18n:govoplan-scheduling.unchecked.1b927dec": "Unchecked",
+    "i18n:govoplan-scheduling.update_response.346233cf": "Update response",
+    "i18n:govoplan-scheduling.use_a_calendar_for_availability_checks_tentative_holds_a.20ccc1fa": "Use a calendar for availability checks, tentative holds, and the final event.",
+    "i18n:govoplan-scheduling.value_participants.e776b092": "{value0} participants",
+    "i18n:govoplan-scheduling.value_responses.ba17af9a": "{value0} responses",
+    "i18n:govoplan-scheduling.what_do_these_actions_do.9a9aee0e": "What do these actions do?",
+    "i18n:govoplan-scheduling.you_can_respond_here_or_use_the_invitation_link_you_rece.1a25fd53": "You can respond here or use the invitation link you received.",
+    "i18n:govoplan-scheduling.your_response_has_been_recorded.b855088d": "Your response has been recorded."
+  },
+  de: {
+    "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",
+    "i18n:govoplan-scheduling.answered.e0aafffa": "Beantwortet",
+    "i18n:govoplan-scheduling.available.7c62a142": "Verfügbar",
+    "i18n:govoplan-scheduling.awaiting_response.ee646ea9": "Antwort ausstehend",
+    "i18n:govoplan-scheduling.basic_information.d8bc7383": "Grunddaten",
+    "i18n:govoplan-scheduling.busy.592a9d16": "Belegt",
+    "i18n:govoplan-scheduling.calendar.adab5090": "Kalender",
+    "i18n:govoplan-scheduling.calendar_coordination.291ab00a": "Kalenderabgleich",
+    "i18n:govoplan-scheduling.configured_calendar.e2e8ebd5": "Ausgewählter Kalender",
+    "i18n:govoplan-scheduling.calendar_integration.181ad18b": "Kalenderintegration",
+    "i18n:govoplan-scheduling.calendar_integration_requires_the_calendar_module_plus_c.f892cb1e": "Die Kalenderintegration benötigt das Kalendermodul sowie Leserechte für Kalender und Verfügbarkeiten und Schreibrechte für Termine.",
+    "i18n:govoplan-scheduling.candidate_availability.9541c4b5": "Verfügbarkeit zu den Vorschlägen",
+    "i18n:govoplan-scheduling.candidate_slots.c414946b": "Terminvorschläge",
+    "i18n:govoplan-scheduling.check_free_busy.e9700e00": "Frei/Belegt prüfen",
+    "i18n:govoplan-scheduling.choose_availability.ac95b8f6": "Verfügbarkeit auswählen",
+    "i18n:govoplan-scheduling.choose_availability_for_at_least_one_candidate_slot.28d2111f": "Wählen Sie für mindestens einen Terminvorschlag eine Verfügbarkeit aus.",
+    "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",
+    "i18n:govoplan-scheduling.decision.7f59a1f1": "Entscheidung",
+    "i18n:govoplan-scheduling.declined.ff59b80f": "Abgelehnt",
+    "i18n:govoplan-scheduling.decide_on_value.196409cd": "{value0} als Termin festlegen",
+    "i18n:govoplan-scheduling.description.55f8ebc8": "Beschreibung",
+    "i18n:govoplan-scheduling.determined.9f23293d": "Festgelegt",
+    "i18n:govoplan-scheduling.discard.36fff63c": "Verwerfen",
+    "i18n:govoplan-scheduling.discard_this_unsaved_scheduling_request.4a956be2": "Diese ungespeicherte Terminanfrage verwerfen?",
+    "i18n:govoplan-scheduling.draft.23d33e22": "Entwurf",
+    "i18n:govoplan-scheduling.end.a2bb9d34": "Ende",
+    "i18n:govoplan-scheduling.error.7f2f6a15": "Fehler",
+    "i18n:govoplan-scheduling.every_candidate_slot_must_end_after_it_starts.47836010": "Jeder Terminvorschlag muss nach seinem Beginn enden.",
+    "i18n:govoplan-scheduling.failed.09fef5d8": "Fehlgeschlagen",
+    "i18n:govoplan-scheduling.free.75f52718": "Frei",
+    "i18n:govoplan-scheduling.free_busy_checks_each_candidate_slot_against_the_selecte.50f0371a": "Frei/Belegt prüft jeden Terminvorschlag gegen den ausgewählten Kalender.",
+    "i18n:govoplan-scheduling.loading_scheduling_requests.f42be95d": "Terminanfragen werden geladen …",
+    "i18n:govoplan-scheduling.invitation.6306ef74": "Einladung",
+    "i18n:govoplan-scheduling.invited.53469df1": "Eingeladen",
+    "i18n:govoplan-scheduling.location.d219c681": "Ort",
+    "i18n:govoplan-scheduling.managed_scheduling_requests.7a45972f": "Verwaltete Terminanfragen",
+    "i18n:govoplan-scheduling.maybe.56dd8d0b": "Vielleicht",
+    "i18n:govoplan-scheduling.my_scheduling_requests.d28ef235": "Meine Terminanfragen",
+    "i18n:govoplan-scheduling.name.709a2322": "Name",
+    "i18n:govoplan-scheduling.new_scheduling_request.2080f675": "Neue Terminanfrage",
+    "i18n:govoplan-scheduling.no_notifications_have_been_created.c8d43ca3": "Es wurden noch keine Benachrichtigungen erstellt.",
+    "i18n:govoplan-scheduling.no_participants.73a89101": "Keine Teilnehmenden",
+    "i18n:govoplan-scheduling.no_requests_in_this_group.a63c1b40": "Keine Anfragen in dieser Gruppe",
+    "i18n:govoplan-scheduling.no_scheduling_request_selected.ac940664": "Keine Terminanfrage ausgewählt",
+    "i18n:govoplan-scheduling.notifications.753a22b2": "Benachrichtigungen",
+    "i18n:govoplan-scheduling.open.cf9b7706": "Offen",
+    "i18n:govoplan-scheduling.open_poll.2beac9a7": "Abstimmung öffnen",
+    "i18n:govoplan-scheduling.open_starts_collecting_availability_responses.c8ec34e5": "Öffnen startet die Erfassung von Verfügbarkeitsantworten.",
+    "i18n:govoplan-scheduling.option_value.3f643dc0": "Vorschlag {value0}",
+    "i18n:govoplan-scheduling.other_scheduling_requests.5cb6eb30": "Andere Terminanfragen",
+    "i18n:govoplan-scheduling.participant_email.2cadfd9e": "E-Mail der teilnehmenden Person",
+    "i18n:govoplan-scheduling.participant_names_and_statuses_are_hidden_aggregate_counts_r.d811a69a": "Namen und Antwortstatus der Teilnehmenden sind ausgeblendet. Zusammengefasste Anzahlen bleiben sichtbar.",
+    "i18n:govoplan-scheduling.share_participant_names_and_response_statuses.df0bf9e0": "Namen und Antwortstatus der Teilnehmenden freigeben",
+    "i18n:govoplan-scheduling.when_enabled_participants_can_see_other_participants_names.3ac78361": "Wenn aktiviert, sehen Teilnehmende die Namen und Antwortstatus anderer Teilnehmender. E-Mail-Adressen und Einladungsdetails bleiben privat.",
+    "i18n:govoplan-scheduling.participants.cd56e083": "Teilnehmende",
+    "i18n:govoplan-scheduling.past.405c12fb": "Vergangen",
+    "i18n:govoplan-scheduling.pending.96f608c1": "Ausstehend",
+    "i18n:govoplan-scheduling.queued.6a599877": "Eingereiht",
+    "i18n:govoplan-scheduling.refresh_requests.0a3ed7a1": "Anfragen aktualisieren",
+    "i18n:govoplan-scheduling.reminder_creates_a_notification_job_for_every_active_par.7ec68797": "Erinnern erstellt für jede aktive teilnehmende Person einen Benachrichtigungsauftrag.",
+    "i18n:govoplan-scheduling.remove.e963907d": "Entfernen",
+    "i18n:govoplan-scheduling.remove_participant_value.e55f2b70": "Teilnehmende Person {value0} entfernen",
+    "i18n:govoplan-scheduling.remove_slot_value.3adc7576": "Terminvorschlag {value0} entfernen",
+    "i18n:govoplan-scheduling.removed.b5e77c5c": "Entfernt",
+    "i18n:govoplan-scheduling.reminder.b87a1929": "Erinnerung",
+    "i18n:govoplan-scheduling.request_failed.9fcda32c": "Anfrage fehlgeschlagen",
+    "i18n:govoplan-scheduling.required.eed6bfb4": "Erforderlich",
+    "i18n:govoplan-scheduling.requires_calendar_availability_read_access.b48ed91b": "Erfordert Leserechte für Kalenderverfügbarkeiten.",
+    "i18n:govoplan-scheduling.requires_calendar_event_write_access.887b0763": "Erfordert Schreibrechte für Kalendertermine.",
+    "i18n:govoplan-scheduling.responses_may_be_updated_while_this_request_remains_open.4faecbbe": "Antworten können aktualisiert werden, solange diese Anfrage offen ist.",
+    "i18n:govoplan-scheduling.responded.4f218211": "Geantwortet",
+    "i18n:govoplan-scheduling.save.efc007a3": "Speichern",
+    "i18n:govoplan-scheduling.saving.56a2285c": "Wird gespeichert …",
+    "i18n:govoplan-scheduling.scheduling_requests.b3c12f4d": "Terminanfragen",
+    "i18n:govoplan-scheduling.scheduling_request_title_is_required.a27338be": "Für die Terminanfrage ist ein Titel erforderlich.",
+    "i18n:govoplan-scheduling.scheduling_requests_for_me.1d521aba": "Terminanfragen an mich",
+    "i18n:govoplan-scheduling.select_a_calendar.f6af95bb": "Kalender auswählen",
+    "i18n:govoplan-scheduling.select_a_calendar_or_turn_off_calendar_integration.cc3652a9": "Wählen Sie einen Kalender aus oder schalten Sie die Kalenderintegration aus.",
+    "i18n:govoplan-scheduling.send_reminder.cf5eb3bf": "Erinnerung senden",
+    "i18n:govoplan-scheduling.sending.ceafde86": "Wird gesendet",
+    "i18n:govoplan-scheduling.sent.35f49dcf": "Gesendet",
+    "i18n:govoplan-scheduling.skipped.5a000ad7": "Übersprungen",
+    "i18n:govoplan-scheduling.start.952f3754": "Beginn",
+    "i18n:govoplan-scheduling.status.bae7d5be": "Status",
+    "i18n:govoplan-scheduling.submit_response.a5f0c053": "Antwort senden",
+    "i18n:govoplan-scheduling.tentative_holds_create_one_provisional_calendar_event_pe.ff3f1884": "Vorläufige Reservierungen erstellen je Terminvorschlag einen provisorischen Kalendereintrag.",
+    "i18n:govoplan-scheduling.the_final_event_is_created_only_for_the_selected_slot.e3621252": "Der endgültige Kalendereintrag wird nur für den ausgewählten Termin erstellt.",
+    "i18n:govoplan-scheduling.the_response_replaces_your_previous_availability_choices.74c16d53": "Die Antwort ersetzt Ihre vorherige Verfügbarkeitsauswahl.",
+    "i18n:govoplan-scheduling.title.768e0c1c": "Titel",
+    "i18n:govoplan-scheduling.unavailable.2c9c1f79": "Nicht verfügbar",
+    "i18n:govoplan-scheduling.unchecked.1b927dec": "Nicht geprüft",
+    "i18n:govoplan-scheduling.update_response.346233cf": "Antwort aktualisieren",
+    "i18n:govoplan-scheduling.use_a_calendar_for_availability_checks_tentative_holds_a.20ccc1fa": "Einen Kalender für Verfügbarkeitsprüfungen, vorläufige Reservierungen und den endgültigen Termin verwenden.",
+    "i18n:govoplan-scheduling.value_participants.e776b092": "{value0} Teilnehmende",
+    "i18n:govoplan-scheduling.value_responses.ba17af9a": "{value0} Antworten",
+    "i18n:govoplan-scheduling.what_do_these_actions_do.9a9aee0e": "Was bewirken diese Aktionen?",
+    "i18n:govoplan-scheduling.you_can_respond_here_or_use_the_invitation_link_you_rece.1a25fd53": "Sie können hier oder über den erhaltenen Einladungslink antworten.",
+    "i18n:govoplan-scheduling.your_response_has_been_recorded.b855088d": "Ihre Antwort wurde gespeichert."
+  }
+};

webui/src/index.ts

@@ -0,0 +1,2 @@
+export { schedulingModule as default, schedulingModule } from "./module";
+export * from "./api/scheduling";

webui/src/module.ts

@@ -0,0 +1,23 @@
+import { createElement, lazy } from "react";
+import type { PlatformWebModule } from "@govoplan/core-webui";
+import { generatedTranslations } from "./i18n/generatedTranslations";
+import "./styles/scheduling.css";
+
+const SchedulingPage = lazy(() => import("./features/scheduling/SchedulingPage"));
+
+const scheduleRead = ["scheduling:schedule:read"];
+
+export const schedulingModule: PlatformWebModule = {
+  id: "scheduling",
+  label: "Scheduling",
+  version: "1.0.0",
+  dependencies: ["poll"],
+  optionalDependencies: ["calendar", "mail", "notifications", "workflow", "appointments", "addresses"],
+  translations: generatedTranslations,
+  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 }) }
+  ]
+};
+
+export default schedulingModule;

webui/src/styles/scheduling.css

@@ -0,0 +1,434 @@
+.scheduling-page {
+  box-sizing: border-box;
+  height: calc(100vh - 115px);
+  min-height: 0;
+  overflow: hidden;
+  color: var(--text);
+  background: var(--bg);
+}
+
+.scheduling-page *,
+.scheduling-page *::before,
+.scheduling-page *::after {
+  box-sizing: border-box;
+}
+
+.scheduling-workspace,
+.scheduling-full-editor {
+  width: 100%;
+  height: 100%;
+  min-width: 0;
+  min-height: 0;
+  display: flex;
+  flex-direction: column;
+  overflow: hidden;
+  border: var(--border-line);
+  background: var(--bg);
+}
+
+.scheduling-page-header {
+  min-height: 58px;
+  flex: 0 0 auto;
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 12px;
+  padding: 10px 14px;
+  border-bottom: var(--border-line);
+  background: var(--panel-header);
+}
+
+.scheduling-page-title,
+.scheduling-page-actions,
+.scheduling-card-actions,
+.scheduling-actions,
+.scheduling-status-row {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+
+.scheduling-page-title {
+  min-width: 0;
+}
+
+.scheduling-page-title > div {
+  min-width: 0;
+}
+
+.scheduling-page-title h1 {
+  margin: 0;
+  color: var(--text-strong);
+  font-size: 19px;
+}
+
+.scheduling-page-title p {
+  margin: 3px 0 0;
+  color: var(--muted);
+  font-size: 12px;
+}
+
+.scheduling-page-actions,
+.scheduling-card-actions,
+.scheduling-actions {
+  flex-wrap: wrap;
+  justify-content: flex-end;
+}
+
+.scheduling-page-actions {
+  margin-left: auto;
+}
+
+.scheduling-page-actions .btn,
+.scheduling-card-actions .btn,
+.scheduling-actions .btn,
+.scheduling-response-card + .btn {
+  min-height: 34px;
+  display: inline-flex;
+  align-items: center;
+  gap: 6px;
+}
+
+.scheduling-icon-button.btn {
+  width: 34px;
+  min-width: 34px;
+  height: 34px;
+  min-height: 34px;
+  padding: 0;
+  justify-content: center;
+}
+
+.scheduling-alert,
+.scheduling-success {
+  margin: 10px 14px 0;
+  padding: 9px 11px;
+  border: var(--border-line);
+  border-radius: 7px;
+}
+
+.scheduling-alert {
+  border-color: var(--danger);
+  color: var(--danger);
+  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 {
+  min-width: 0;
+  min-height: 0;
+  overflow: auto;
+  padding: 14px;
+}
+
+.scheduling-detail,
+.scheduling-editor-scroll {
+  display: grid;
+  align-content: start;
+  gap: 12px;
+}
+
+.scheduling-request-groups {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
+  gap: 12px;
+}
+
+.scheduling-list-group {
+  min-height: 52px;
+  max-height: 270px;
+  overflow: auto;
+}
+
+.scheduling-list-item {
+  width: 100%;
+  min-height: 50px;
+  display: grid;
+  grid-template-columns: minmax(0, 1fr) auto;
+  gap: 10px;
+  align-items: center;
+  margin: 0 0 4px;
+  padding: 8px 10px;
+  border: 1px solid transparent;
+  border-radius: 7px;
+  color: var(--text);
+  background: transparent;
+  text-align: left;
+  cursor: pointer;
+}
+
+.scheduling-list-item:hover {
+  background: var(--hover-bg);
+}
+
+.scheduling-list-item.is-selected {
+  border-color: color-mix(in srgb, var(--accent) 45%, transparent);
+  background: color-mix(in srgb, var(--accent) 10%, var(--panel));
+}
+
+.scheduling-list-item > span {
+  min-width: 0;
+  display: grid;
+  gap: 3px;
+}
+
+.scheduling-list-item strong,
+.scheduling-list-item small,
+.scheduling-compact-row span {
+  min-width: 0;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.scheduling-list-item small,
+.scheduling-note,
+.scheduling-list-empty,
+.scheduling-compact-row small {
+  color: var(--muted);
+  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;
+}
+
+.scheduling-status-row {
+  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);
+}
+
+.scheduling-columns {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: 12px;
+}
+
+.scheduling-compact-row {
+  min-height: 36px;
+  display: grid;
+  grid-template-columns: minmax(0, 1fr) auto;
+  gap: 8px;
+  align-items: center;
+  border-bottom: var(--border-line);
+}
+
+.scheduling-compact-row:last-child {
+  border-bottom: 0;
+}
+
+.scheduling-response-card {
+  display: grid;
+  gap: 12px;
+}
+
+.scheduling-response-card > p {
+  margin: 0;
+}
+
+.scheduling-response-grid {
+  display: grid;
+  gap: 6px;
+}
+
+.scheduling-response-grid label {
+  min-width: 0;
+  display: grid;
+  grid-template-columns: minmax(220px, 1fr) minmax(160px, 240px);
+  gap: 12px;
+  align-items: center;
+  padding: 8px 0;
+  border-bottom: var(--border-line);
+}
+
+.scheduling-response-grid label:last-child {
+  border-bottom: 0;
+}
+
+.scheduling-response-grid label > span {
+  min-width: 0;
+  display: grid;
+  gap: 3px;
+}
+
+.scheduling-response-grid small {
+  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(--input-bg);
+  font: inherit;
+}
+
+.scheduling-action-help {
+  margin: 0;
+}
+
+.scheduling-empty {
+  padding: 28px;
+  color: var(--muted);
+  text-align: center;
+}
+
+.scheduling-editor-page {
+  background: var(--panel);
+}
+
+.scheduling-editor-layout {
+  min-width: 0;
+  min-height: 0;
+  flex: 1 1 auto;
+  display: grid;
+  grid-template-columns: 198px minmax(0, 1fr);
+  overflow: hidden;
+}
+
+.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-capability-note {
+  margin: 10px 0 0;
+  color: var(--muted);
+  font-size: 12px;
+}
+
+.scheduling-selected-calendar {
+  max-width: 520px;
+}
+
+@media (max-width: 900px) {
+  .scheduling-editor-layout {
+    grid-template-columns: minmax(0, 1fr);
+  }
+}
+
+@media (max-width: 820px) {
+  .scheduling-page {
+    height: auto;
+    min-height: calc(100vh - 115px);
+    overflow: auto;
+  }
+
+  .scheduling-workspace,
+  .scheduling-full-editor,
+  .scheduling-editor-layout,
+  .scheduling-detail,
+  .scheduling-editor-scroll {
+    height: auto;
+    overflow: visible;
+  }
+
+  .scheduling-columns,
+  .scheduling-form-grid {
+    grid-template-columns: minmax(0, 1fr);
+  }
+
+  .scheduling-page-header {
+    align-items: flex-start;
+    flex-wrap: wrap;
+  }
+
+  .scheduling-page-actions,
+  .scheduling-card-actions,
+  .scheduling-actions {
+    width: 100%;
+  }
+
+  .scheduling-page-actions .btn:last-child,
+  .scheduling-card-actions .btn:last-child,
+  .scheduling-actions .btn:last-child {
+    margin-left: auto;
+  }
+
+  .scheduling-response-grid label {
+    grid-template-columns: minmax(0, 1fr);
+  }
+}

webui/src/vite-env.d.ts

@@ -0,0 +1,13 @@
+interface ImportMetaEnv {
+  readonly VITE_API_BASE_URL?: string;
+  readonly VITE_CSRF_COOKIE_NAME?: string;
+}
+
+interface ImportMeta {
+  readonly env: ImportMetaEnv;
+}
+
+declare module "virtual:govoplan-installed-modules" {
+  const modules: any[];
+  export default modules;
+}

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

@@ -0,0 +1,124 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+import type { SchedulingRequest } from "../src/api/scheduling.ts";
+import {
+  groupSchedulingRequests,
+  schedulingSortPhase,
+  type SchedulingActor
+} from "../src/features/scheduling/schedulingViewModel.ts";
+
+const now = new Date("2026-07-20T10:00:00Z");
+const actor: SchedulingActor = {
+  accountId: "account-1",
+  membershipId: "membership-1",
+  email: "person@example.test"
+};
+
+function request(
+  id: string,
+  options: {
+    organizer?: string;
+    participantStatus?: string;
+    status?: SchedulingRequest["status"];
+    start?: string;
+    end?: string;
+  } = {}
+): SchedulingRequest {
+  return {
+    id,
+    tenant_id: "tenant-1",
+    title: id,
+    timezone: "UTC",
+    status: options.status ?? "collecting",
+    organizer_user_id: options.organizer ?? "organizer-elsewhere",
+    allow_external_participants: true,
+    allow_participant_updates: true,
+    result_visibility: "after_close",
+    participant_visibility: "aggregates_only",
+    effective_participant_visibility: "aggregates_only",
+    participant_aggregate: {
+      total: options.participantStatus ? 1 : 0,
+      status_counts: options.participantStatus ? { [options.participantStatus]: 1 } : {}
+    },
+    participant_visibility_decision: {
+      requested_visibility: "aggregates_only",
+      effective_visibility: "aggregates_only",
+      policy_applied: false,
+      source_path: [],
+      details: {}
+    },
+    calendar_integration_enabled: false,
+    calendar_freebusy_enabled: false,
+    calendar_hold_enabled: false,
+    create_calendar_event_on_decision: false,
+    created_at: "2026-07-01T00:00:00Z",
+    updated_at: "2026-07-01T00:00:00Z",
+    metadata: {},
+    slots: [{
+      id: `slot-${id}`,
+      label: id,
+      start_at: options.start ?? "2026-07-21T09:00:00Z",
+      end_at: options.end ?? "2026-07-21T10:00:00Z",
+      timezone: "UTC",
+      position: 0,
+      freebusy_conflicts: [],
+      metadata: {}
+    }],
+    participants: options.participantStatus ? [{
+      id: `participant-${id}`,
+      respondent_id: "membership-1",
+      email: "person@example.test",
+      participant_type: "internal",
+      required: true,
+      status: options.participantStatus,
+      metadata: {}
+    }] : []
+  };
+}
+
+test("groups owned, invited, and administrator-only requests without hiding any", () => {
+  const groups = groupSchedulingRequests([
+    request("managed"),
+    request("mine", { organizer: "account-1" }),
+    request("invited", { participantStatus: "invited" })
+  ], actor, now);
+
+  assert.deepEqual(groups.owned.map((item) => item.id), ["mine"]);
+  assert.deepEqual(groups.invited.map((item) => item.id), ["invited"]);
+  assert.deepEqual(groups.other.map((item) => item.id), ["managed"]);
+});
+
+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",
+    participantStatus: "responded"
+  });
+
+  assert.equal(schedulingSortPhase(owned, actor, now), "unanswered");
+});
+
+test("orders unanswered by nearest slot before answered, closed, determined, and past", () => {
+  const groups = groupSchedulingRequests([
+    request("past", {
+      participantStatus: "invited",
+      start: "2026-07-18T09:00:00Z",
+      end: "2026-07-18T10:00:00Z"
+    }),
+    request("determined", { participantStatus: "invited", status: "decided" }),
+    request("closed", { participantStatus: "invited", status: "closed" }),
+    request("answered", { participantStatus: "responded" }),
+    request("later", { participantStatus: "invited", start: "2026-07-23T09:00:00Z" }),
+    request("nearer", { participantStatus: "invited", start: "2026-07-21T09:00:00Z" })
+  ], actor, now);
+
+  assert.deepEqual(groups.invited.map((item) => item.id), [
+    "nearer",
+    "later",
+    "answered",
+    "closed",
+    "determined",
+    "past"
+  ]);
+  assert.equal(schedulingSortPhase(groups.invited[0], actor, now), "unanswered");
+  assert.equal(schedulingSortPhase(groups.invited.at(-1)!, actor, now), "past");
+});

webui/tsconfig.json

@@ -0,0 +1,31 @@
+{
+  "compilerOptions": {
+    "target": "ES2020",
+    "useDefineForClassFields": true,
+    "lib": ["DOM", "DOM.Iterable", "ES2020"],
+    "allowJs": false,
+    "skipLibCheck": true,
+    "esModuleInterop": true,
+    "allowSyntheticDefaultImports": true,
+    "strict": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "forceConsistentCasingInFileNames": true,
+    "module": "ESNext",
+    "moduleResolution": "Bundler",
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "noEmit": true,
+    "jsx": "react-jsx",
+    "preserveSymlinks": true,
+    "baseUrl": ".",
+    "paths": {
+      "@govoplan/core-webui": ["../../govoplan-core/webui/src/index.ts"],
+      "@govoplan/core-webui/*": ["../../govoplan-core/webui/src/*"],
+      "lucide-react": ["../../govoplan-core/webui/node_modules/lucide-react/dist/lucide-react.d.ts"],
+      "react": ["../../govoplan-core/webui/node_modules/@types/react/index.d.ts"],
+      "react/jsx-runtime": ["../../govoplan-core/webui/node_modules/@types/react/jsx-runtime.d.ts"]
+    }
+  },
+  "include": ["src"]
+}