diff --git a/src/govoplan_organizations/backend/api/v1/routes.py b/src/govoplan_organizations/backend/api/v1/routes.py
index 55c8d00..ea826ed 100644
--- a/src/govoplan_organizations/backend/api/v1/routes.py
+++ b/src/govoplan_organizations/backend/api/v1/routes.py
@@ -15,6 +15,7 @@ from govoplan_organizations.backend.db.models import (
     OrganizationFunctionType,
     OrganizationRelation,
     OrganizationRelationType,
+    OrganizationTenantSettings,
     OrganizationStructure,
     OrganizationUnit,
     OrganizationUnitType,
@@ -33,6 +34,8 @@ from .schemas import (
     OrganizationModelResponse,
     OrganizationRelationItem,
     OrganizationRelationTypeItem,
+    OrganizationSettingsItem,
+    OrganizationSettingsUpdateRequest,
     OrganizationStructureItem,
     OrganizationUnitItem,
     OrganizationUnitTypeItem,
@@ -61,6 +64,8 @@ ORG_MODEL_WRITE_SCOPES = ("organizations:model:write",)
 ORG_UNIT_WRITE_SCOPES = ("organizations:unit:write",)
 ORG_FUNCTION_WRITE_SCOPES = ("organizations:function:write",)
 ORG_ASSIGN_SCOPES = ("organizations:function:assign",)
+ORG_SETTINGS_READ_SCOPES = ("organizations:settings:read", "organizations:model:read", "admin:settings:read")
+ORG_SETTINGS_WRITE_SCOPES = ("organizations:settings:write", "admin:settings:write")
 SLUG_RE = re.compile(r"[^a-z0-9]+")
 
 ModelT = TypeVar("ModelT")
@@ -129,6 +134,21 @@ def _item_unit_type(item: OrganizationUnitType) -> OrganizationUnitTypeItem:
     return OrganizationUnitTypeItem(**_row_fields(item))
 
 
+def _item_settings(item: OrganizationTenantSettings) -> OrganizationSettingsItem:
+    return OrganizationSettingsItem(**_row_fields(item))
+
+
+def _default_settings(tenant_id: str) -> OrganizationSettingsItem:
+    return OrganizationSettingsItem(
+        tenant_id=tenant_id,
+        allow_tenant_model_customization=True,
+        require_model_change_requests=False,
+        audit_detail_level="standard",
+        change_retention_days=None,
+        settings={},
+    )
+
+
 def _item_structure(item: OrganizationStructure) -> OrganizationStructureItem:
     return OrganizationStructureItem(**_row_fields(item))
 
@@ -187,6 +207,48 @@ def _apply_slugged_update(session: Session, item: object, payload: object, tenan
         setattr(item, "settings", value)
 
 
+@router.get("/settings", response_model=OrganizationSettingsItem)
+def get_organization_settings(
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_any_scope(*ORG_SETTINGS_READ_SCOPES)),
+) -> OrganizationSettingsItem:
+    tenant_id = _tenant_id(principal)
+    item = session.query(OrganizationTenantSettings).filter(OrganizationTenantSettings.tenant_id == tenant_id).one_or_none()
+    return _item_settings(item) if item is not None else _default_settings(tenant_id)
+
+
+@router.patch("/settings", response_model=OrganizationSettingsItem)
+def update_organization_settings(
+    payload: OrganizationSettingsUpdateRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_any_scope(*ORG_SETTINGS_WRITE_SCOPES)),
+) -> OrganizationSettingsItem:
+    tenant_id = _tenant_id(principal)
+    item = session.query(OrganizationTenantSettings).filter(OrganizationTenantSettings.tenant_id == tenant_id).one_or_none()
+    if item is None:
+        item = OrganizationTenantSettings(
+            tenant_id=tenant_id,
+            allow_tenant_model_customization=True,
+            require_model_change_requests=False,
+            audit_detail_level="standard",
+            change_retention_days=None,
+            settings={},
+        )
+        session.add(item)
+    fields = payload.model_fields_set
+    for field in ("allow_tenant_model_customization", "require_model_change_requests", "audit_detail_level", "change_retention_days"):
+        if field in fields:
+            value = getattr(payload, field)
+            if field != "change_retention_days" and value is None:
+                raise _invalid(f"{field} cannot be empty.")
+            setattr(item, field, value)
+    if "settings" in fields:
+        if payload.settings is None:
+            raise _invalid("Settings cannot be empty.")
+        item.settings = payload.settings
+    return _item_settings(_commit(session, item))
+
+
 @router.get("/model", response_model=OrganizationModelResponse)
 def get_organization_model(
     session: Session = Depends(get_session),
@@ -356,6 +418,8 @@ def update_unit(
             raise _invalid("An organization unit cannot be its own parent.")
         if payload.parent_id is not None:
             _get_tenant_row(session, OrganizationUnit, payload.parent_id, tenant_id, "Parent organization unit")
+            if _would_create_parent_cycle(session, tenant_id, item.id, payload.parent_id):
+                raise _invalid("This parent assignment would create an organization unit cycle.")
         item.parent_id = payload.parent_id
     return _item_unit(_commit(session, item))
 
@@ -718,3 +782,17 @@ def _would_create_cycle(
             query = query.filter(OrganizationRelation.id != exclude_relation_id)
         pending.extend(row[0] for row in query.all())
     return False
+
+
+def _would_create_parent_cycle(session: Session, tenant_id: str, unit_id: str, parent_id: str) -> bool:
+    current: str | None = parent_id
+    seen: set[str] = set()
+    while current is not None:
+        if current == unit_id or current in seen:
+            return True
+        seen.add(current)
+        current = session.query(OrganizationUnit.parent_id).filter(
+            OrganizationUnit.tenant_id == tenant_id,
+            OrganizationUnit.id == current,
+        ).scalar()
+    return False
diff --git a/src/govoplan_organizations/backend/api/v1/schemas.py b/src/govoplan_organizations/backend/api/v1/schemas.py
index 1006f72..724625f 100644
--- a/src/govoplan_organizations/backend/api/v1/schemas.py
+++ b/src/govoplan_organizations/backend/api/v1/schemas.py
@@ -7,6 +7,27 @@ from pydantic import BaseModel, Field
 
 
 StructureKind = Literal["hierarchy", "network", "membership", "classification"]
+AuditDetailLevel = Literal["summary", "standard", "full"]
+
+
+class OrganizationSettingsItem(BaseModel):
+    id: str | None = None
+    tenant_id: str
+    allow_tenant_model_customization: bool
+    require_model_change_requests: bool
+    audit_detail_level: AuditDetailLevel
+    change_retention_days: int | None = None
+    settings: dict[str, Any]
+    created_at: datetime | None = None
+    updated_at: datetime | None = None
+
+
+class OrganizationSettingsUpdateRequest(BaseModel):
+    allow_tenant_model_customization: bool | None = None
+    require_model_change_requests: bool | None = None
+    audit_detail_level: AuditDetailLevel | None = None
+    change_retention_days: int | None = Field(default=None, ge=0)
+    settings: dict[str, Any] | None = None
 
 
 class OrganizationUnitTypeItem(BaseModel):
diff --git a/src/govoplan_organizations/backend/db/models.py b/src/govoplan_organizations/backend/db/models.py
index 32aa5bf..bfa463f 100644
--- a/src/govoplan_organizations/backend/db/models.py
+++ b/src/govoplan_organizations/backend/db/models.py
@@ -4,7 +4,7 @@ import uuid
 from datetime import datetime
 from typing import Any
 
-from sqlalchemy import Boolean, DateTime, ForeignKey, Index, JSON, String, Text, UniqueConstraint
+from sqlalchemy import Boolean, DateTime, ForeignKey, Index, Integer, JSON, String, Text, UniqueConstraint
 from sqlalchemy.orm import Mapped, mapped_column
 
 from govoplan_core.db.base import Base, TimestampMixin
@@ -42,6 +42,19 @@ class OrganizationUnitType(Base, TimestampMixin):
     settings: Mapped[dict[str, Any]] = mapped_column(JSON, default=dict, nullable=False)
 
 
+class OrganizationTenantSettings(Base, TimestampMixin):
+    __tablename__ = "organizations_tenant_settings"
+    __table_args__ = (UniqueConstraint("tenant_id", name="uq_organizations_tenant_settings_tenant"),)
+
+    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)
+    allow_tenant_model_customization: Mapped[bool] = mapped_column(Boolean, default=True, nullable=False)
+    require_model_change_requests: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
+    audit_detail_level: Mapped[str] = mapped_column(String(30), default="standard", nullable=False)
+    change_retention_days: Mapped[int | None] = mapped_column(Integer, nullable=True)
+    settings: Mapped[dict[str, Any]] = mapped_column(JSON, default=dict, nullable=False)
+
+
 class OrganizationStructure(Base, TimestampMixin):
     __tablename__ = "organizations_structures"
     __table_args__ = (UniqueConstraint("tenant_id", "slug", name="uq_organizations_structures_tenant_slug"),)
@@ -172,6 +185,7 @@ __all__ = [
     "OrganizationRelation",
     "OrganizationRelationType",
     "OrganizationStructure",
+    "OrganizationTenantSettings",
     "OrganizationUnit",
     "OrganizationUnitType",
     "new_uuid",
diff --git a/src/govoplan_organizations/backend/manifest.py b/src/govoplan_organizations/backend/manifest.py
index 5706c37..9ecd3b9 100644
--- a/src/govoplan_organizations/backend/manifest.py
+++ b/src/govoplan_organizations/backend/manifest.py
@@ -46,6 +46,8 @@ def _permission(scope: str, label: str, description: str) -> PermissionDefinitio
 PERMISSIONS = (
     _permission("organizations:model:read", "View organization model", "Read organization meta-model definitions such as unit types, structures, and relation types."),
     _permission("organizations:model:write", "Manage organization model", "Create and edit organization meta-model definitions."),
+    _permission("organizations:settings:read", "View organization settings", "Read organization governance, audit, and retention settings."),
+    _permission("organizations:settings:write", "Manage organization settings", "Edit organization governance, audit, and retention settings."),
     _permission("organizations:unit:read", "View organization units", "Read concrete organization units and relations."),
     _permission("organizations:unit:write", "Manage organization units", "Create and edit concrete organization units and relations."),
     _permission("organizations:function:read", "View organization functions", "Read function definitions and identity-held assignments."),
@@ -64,7 +66,7 @@ ROLE_TEMPLATES = (
         slug="organization_viewer",
         name="Organization viewer",
         description="Read organization model, organization units, and function assignments.",
-        permissions=("organizations:model:read", "organizations:unit:read", "organizations:function:read"),
+        permissions=("organizations:model:read", "organizations:settings:read", "organizations:unit:read", "organizations:function:read"),
     ),
 )
 
@@ -112,6 +114,7 @@ manifest = ModuleManifest(
     uninstall_guard_providers=(
         persistent_table_uninstall_guard(
             organization_models.OrganizationUnitType,
+            organization_models.OrganizationTenantSettings,
             organization_models.OrganizationStructure,
             organization_models.OrganizationRelationType,
             organization_models.OrganizationRelation,
diff --git a/src/govoplan_organizations/backend/migrations/versions/6d7e8f9a0b1c_organization_meta_model.py b/src/govoplan_organizations/backend/migrations/versions/6d7e8f9a0b1c_organization_meta_model.py
index 7691d02..8e19233 100644
--- a/src/govoplan_organizations/backend/migrations/versions/6d7e8f9a0b1c_organization_meta_model.py
+++ b/src/govoplan_organizations/backend/migrations/versions/6d7e8f9a0b1c_organization_meta_model.py
@@ -71,6 +71,24 @@ def _create_unit_types() -> None:
     _create_index_if_missing(op.f("ix_organizations_unit_types_tenant_id"), "organizations_unit_types", ["tenant_id"])
 
 
+def _create_tenant_settings() -> None:
+    if "organizations_tenant_settings" not in _tables():
+        op.create_table(
+            "organizations_tenant_settings",
+            sa.Column("id", sa.String(length=36), nullable=False),
+            sa.Column("tenant_id", sa.String(length=36), nullable=False),
+            sa.Column("allow_tenant_model_customization", sa.Boolean(), nullable=False),
+            sa.Column("require_model_change_requests", sa.Boolean(), nullable=False),
+            sa.Column("audit_detail_level", sa.String(length=30), nullable=False),
+            sa.Column("change_retention_days", sa.Integer(), nullable=True),
+            _json_column("settings"),
+            *_timestamp_columns(),
+            sa.PrimaryKeyConstraint("id", name=op.f("pk_organizations_tenant_settings")),
+            sa.UniqueConstraint("tenant_id", name="uq_organizations_tenant_settings_tenant"),
+        )
+    _create_index_if_missing(op.f("ix_organizations_tenant_settings_tenant_id"), "organizations_tenant_settings", ["tenant_id"])
+
+
 def _create_structures() -> None:
     if "organizations_structures" not in _tables():
         op.create_table(
@@ -271,6 +289,7 @@ def _create_function_assignments() -> None:
 
 def upgrade() -> None:
     _create_unit_types()
+    _create_tenant_settings()
     _create_structures()
     _create_relation_types()
     _create_units()
@@ -293,6 +312,7 @@ def downgrade() -> None:
         "organizations_relation_types",
         "organizations_structures",
         "organizations_function_types",
+        "organizations_tenant_settings",
         "organizations_unit_types",
     ):
         if table_name in _tables():
diff --git a/webui/src/api/organizations.ts b/webui/src/api/organizations.ts
index 9fe0128..470d25a 100644
--- a/webui/src/api/organizations.ts
+++ b/webui/src/api/organizations.ts
@@ -13,6 +13,27 @@ export type OrganizationUnitTypeItem = {
 };
 
 export type OrganizationStructureKind = "hierarchy" | "network" | "membership" | "classification";
+export type OrganizationAuditDetailLevel = "summary" | "standard" | "full";
+
+export type OrganizationSettingsItem = {
+  id?: string | null;
+  tenant_id: string;
+  allow_tenant_model_customization: boolean;
+  require_model_change_requests: boolean;
+  audit_detail_level: OrganizationAuditDetailLevel;
+  change_retention_days?: number | null;
+  settings: Record<string, unknown>;
+  created_at?: string | null;
+  updated_at?: string | null;
+};
+
+export type OrganizationSettingsUpdatePayload = {
+  allow_tenant_model_customization?: boolean;
+  require_model_change_requests?: boolean;
+  audit_detail_level?: OrganizationAuditDetailLevel;
+  change_retention_days?: number | null;
+  settings?: Record<string, unknown>;
+};
 
 export type OrganizationStructureItem = {
   id: string;
@@ -205,6 +226,14 @@ export function getOrganizationModel(settings: ApiSettings): Promise<Organizatio
   return apiFetch<OrganizationModel>(settings, "/api/v1/organizations/model");
 }
 
+export function getOrganizationSettings(settings: ApiSettings): Promise<OrganizationSettingsItem> {
+  return apiFetch<OrganizationSettingsItem>(settings, "/api/v1/organizations/settings");
+}
+
+export function patchOrganizationSettings(settings: ApiSettings, payload: OrganizationSettingsUpdatePayload): Promise<OrganizationSettingsItem> {
+  return patch(settings, "/api/v1/organizations/settings", payload);
+}
+
 export function createUnitType(settings: ApiSettings, payload: SluggedCreatePayload): Promise<OrganizationUnitTypeItem> {
   return post(settings, "/api/v1/organizations/unit-types", payload);
 }
diff --git a/webui/src/features/organizations/OrganizationsAdminPanel.tsx b/webui/src/features/organizations/OrganizationsAdminPanel.tsx
index e59a3be..773d59d 100644
--- a/webui/src/features/organizations/OrganizationsAdminPanel.tsx
+++ b/webui/src/features/organizations/OrganizationsAdminPanel.tsx
@@ -1,18 +1,156 @@
-import type { ApiSettings, AuthInfo } from "@govoplan/core-webui";
-import OrganizationsPage, { type OrganizationSection } from "./OrganizationsPage";
+import { useEffect, useState } from "react";
+import {
+  AdminPageLayout,
+  Button,
+  Card,
+  FormField,
+  ToggleSwitch,
+  adminErrorMessage,
+  hasAnyScope,
+  useUnsavedDraftGuard,
+  type ApiSettings,
+  type AuthInfo
+} from "@govoplan/core-webui";
+import {
+  getOrganizationSettings,
+  patchOrganizationSettings,
+  type OrganizationAuditDetailLevel,
+  type OrganizationSettingsItem
+} from "../../api/organizations";
 
-const MODEL_SECTIONS: OrganizationSection[] = ["model"];
+const FALLBACK_SETTINGS: OrganizationSettingsItem = {
+  tenant_id: "",
+  allow_tenant_model_customization: true,
+  require_model_change_requests: false,
+  audit_detail_level: "standard",
+  change_retention_days: null,
+  settings: {}
+};
+
+const AUDIT_DETAIL_LEVELS: Array<{ value: OrganizationAuditDetailLevel; label: string }> = [
+  { value: "summary", label: "i18n:govoplan-organizations.audit_summary.6a7d68a5" },
+  { value: "standard", label: "i18n:govoplan-organizations.audit_standard.785d981f" },
+  { value: "full", label: "i18n:govoplan-organizations.audit_full.0c83669c" }
+];
 
 export default function OrganizationsAdminPanel({ settings, auth }: { settings: ApiSettings; auth: AuthInfo }) {
+  const [draft, setDraft] = useState<OrganizationSettingsItem>(FALLBACK_SETTINGS);
+  const [savedDraft, setSavedDraft] = useState<OrganizationSettingsItem>(FALLBACK_SETTINGS);
+  const [loading, setLoading] = useState(true);
+  const [busy, setBusy] = useState(false);
+  const [error, setError] = useState("");
+  const [success, setSuccess] = useState("");
+  const canWrite = hasAnyScope(auth, ["organizations:settings:write", "admin:settings:write"]);
+  const dirty = settingsKey(draft) !== settingsKey(savedDraft);
+
+  useUnsavedDraftGuard({
+    dirty,
+    onSave: save,
+    onDiscard: () => setDraft(savedDraft)
+  });
+
+  useEffect(() => {
+    void load();
+  }, [settings.accessToken, settings.apiBaseUrl]);
+
+  async function load() {
+    setLoading(true);
+    setError("");
+    try {
+      const next = await getOrganizationSettings(settings);
+      setDraft(next);
+      setSavedDraft(next);
+    } catch (caught) {
+      setError(adminErrorMessage(caught));
+    } finally {
+      setLoading(false);
+    }
+  }
+
+  async function save(): Promise<boolean> {
+    setBusy(true);
+    setError("");
+    setSuccess("");
+    try {
+      const saved = await patchOrganizationSettings(settings, {
+        allow_tenant_model_customization: draft.allow_tenant_model_customization,
+        require_model_change_requests: draft.require_model_change_requests,
+        audit_detail_level: draft.audit_detail_level,
+        change_retention_days: draft.change_retention_days ?? null,
+        settings: draft.settings
+      });
+      setDraft(saved);
+      setSavedDraft(saved);
+      setSuccess("i18n:govoplan-organizations.organization_settings_saved.bfbcfdfa");
+      return true;
+    } catch (caught) {
+      setError(adminErrorMessage(caught));
+      return false;
+    } finally {
+      setBusy(false);
+    }
+  }
+
   return (
-    <OrganizationsPage
-      settings={settings}
-      auth={auth}
-      mode="admin"
-      initialSection="model"
-      availableSections={MODEL_SECTIONS}
-      title="i18n:govoplan-organizations.organization_model.4f924c0e"
-      description="i18n:govoplan-organizations.organization_model_admin_description.35dc9f10"
-    />
+    <AdminPageLayout
+      title="i18n:govoplan-organizations.organization_settings.c9ab9829"
+      description="i18n:govoplan-organizations.organization_settings_description.35dc9f10"
+      loading={loading}
+      loadingLabel="i18n:govoplan-organizations.loading_organization_settings.c6008db8"
+      error={error}
+      success={success}
+      actions={<><Button onClick={() => void load()} disabled={loading || busy}>i18n:govoplan-organizations.reload.cce71553</Button><Button variant="primary" onClick={() => void save()} disabled={!canWrite || busy || !dirty}>{busy ? "i18n:govoplan-organizations.saving.56a2285c" : "i18n:govoplan-organizations.save_settings.913aba9f"}</Button></>}
+    >
+      <div className="organizations-settings-grid">
+        <Card title="i18n:govoplan-organizations.model_governance.6aa18fd0">
+          <div className="settings-list">
+            <ToggleSwitch
+              checked={draft.allow_tenant_model_customization}
+              disabled={!canWrite || busy}
+              onChange={(checked) => setDraft({ ...draft, allow_tenant_model_customization: checked })}
+              label="i18n:govoplan-organizations.allow_tenant_model_customization.2425d751"
+            />
+            <ToggleSwitch
+              checked={draft.require_model_change_requests}
+              disabled={!canWrite || busy}
+              onChange={(checked) => setDraft({ ...draft, require_model_change_requests: checked })}
+              label="i18n:govoplan-organizations.require_model_change_requests.83454cad"
+            />
+          </div>
+          <p className="muted small-note">i18n:govoplan-organizations.model_governance_help.0fa69021</p>
+        </Card>
+
+        <Card title="i18n:govoplan-organizations.audit_and_retention.3ba1d2fc">
+          <div className="organizations-form-grid">
+            <FormField label="i18n:govoplan-organizations.audit_detail_level.7397355d">
+              <select value={draft.audit_detail_level} disabled={!canWrite || busy} onChange={(event) => setDraft({ ...draft, audit_detail_level: event.target.value as OrganizationAuditDetailLevel })}>
+                {AUDIT_DETAIL_LEVELS.map((item) => <option key={item.value} value={item.value}>{item.label}</option>)}
+              </select>
+            </FormField>
+            <FormField label="i18n:govoplan-organizations.change_retention_days.71bbd140">
+              <input
+                type="number"
+                min={0}
+                value={draft.change_retention_days ?? ""}
+                disabled={!canWrite || busy}
+                placeholder="i18n:govoplan-organizations.unlimited.35569464"
+                onChange={(event) => setDraft({ ...draft, change_retention_days: event.target.value === "" ? null : Math.max(0, Number(event.target.value)) })}
+              />
+            </FormField>
+          </div>
+          <p className="muted small-note">i18n:govoplan-organizations.audit_retention_help.42dec57d</p>
+        </Card>
+      </div>
+    </AdminPageLayout>
   );
 }
+
+function settingsKey(settings: OrganizationSettingsItem): string {
+  return JSON.stringify({
+    allow_tenant_model_customization: settings.allow_tenant_model_customization,
+    require_model_change_requests: settings.require_model_change_requests,
+    audit_detail_level: settings.audit_detail_level,
+    change_retention_days: settings.change_retention_days ?? null,
+    settings: settings.settings
+  });
+}
diff --git a/webui/src/features/organizations/OrganizationsPage.tsx b/webui/src/features/organizations/OrganizationsPage.tsx
index 480d1d2..e1f6501 100644
--- a/webui/src/features/organizations/OrganizationsPage.tsx
+++ b/webui/src/features/organizations/OrganizationsPage.tsx
@@ -1,5 +1,5 @@
 import { useCallback, useEffect, useMemo, useState, type FormEvent } from "react";
-import { RefreshCw, Save, XCircle } from "lucide-react";
+import { Edit3, Plus, RefreshCw, Save, XCircle } from "lucide-react";
 import {
   ApiError,
   Button,
@@ -226,6 +226,24 @@ function sluggedPayload(draft: SluggedDraft): SluggedCreatePayload {
   };
 }
 
+function sluggedPatchPayload(draft: SluggedDraft): Partial<SluggedCreatePayload> {
+  return {
+    name: draft.name.trim(),
+    slug: textOrNull(draft.slug),
+    description: textOrNull(draft.description),
+    is_active: draft.is_active
+  };
+}
+
+function sluggedDraftFrom(item: { name: string; slug: string; description?: string | null; is_active: boolean }): SluggedDraft {
+  return {
+    name: item.name,
+    slug: item.slug,
+    description: item.description ?? "",
+    is_active: item.is_active
+  };
+}
+
 function isSluggedDirty(draft: SluggedDraft): boolean {
   return draft.name.trim() !== "" || draft.slug.trim() !== "" || draft.description.trim() !== "" || !draft.is_active;
 }
@@ -297,6 +315,17 @@ function ActiveToggleButton({ item, disabled, onToggle }: { item: ActiveItem; di
   );
 }
 
+function RowActions({ item, disabled, onEdit, onToggle }: { item: ActiveItem; disabled: boolean; onEdit: () => void; onToggle: () => void }) {
+  return (
+    <div className="organizations-row-actions">
+      <Button type="button" variant="ghost" disabled={disabled} onClick={onEdit} title="i18n:govoplan-organizations.edit.7dce1220">
+        <Edit3 size={16} aria-hidden="true" /> i18n:govoplan-organizations.edit.7dce1220
+      </Button>
+      <ActiveToggleButton item={item} disabled={disabled} onToggle={onToggle} />
+    </div>
+  );
+}
+
 function SluggedFields({
   draft,
   onChange,
@@ -354,6 +383,15 @@ export default function OrganizationsPage({
   const [functionTypeDraft, setFunctionTypeDraft] = useState<FunctionTypeDraft>(() => emptyFunctionTypeDraft());
   const [functionDraft, setFunctionDraft] = useState<FunctionDraft>(() => emptyFunctionDraft());
   const [assignmentDraft, setAssignmentDraft] = useState<AssignmentDraft>(() => emptyAssignmentDraft());
+  const [editingUnitTypeId, setEditingUnitTypeId] = useState<string | null>(null);
+  const [editingStructureId, setEditingStructureId] = useState<string | null>(null);
+  const [editingRelationTypeId, setEditingRelationTypeId] = useState<string | null>(null);
+  const [editingUnitId, setEditingUnitId] = useState<string | null>(null);
+  const [editingRelationId, setEditingRelationId] = useState<string | null>(null);
+  const [editingFunctionTypeId, setEditingFunctionTypeId] = useState<string | null>(null);
+  const [editingFunctionId, setEditingFunctionId] = useState<string | null>(null);
+  const [editingAssignmentId, setEditingAssignmentId] = useState<string | null>(null);
+  const [selectedUnitId, setSelectedUnitId] = useState("");
 
   const canWriteModel = hasScope(auth, "organizations:model:write");
   const canWriteUnits = hasScope(auth, "organizations:unit:write");
@@ -366,6 +404,15 @@ export default function OrganizationsPage({
   const unitById = useMemo(() => mapById(model.units), [model.units]);
   const functionTypeById = useMemo(() => mapById(model.function_types), [model.function_types]);
   const functionById = useMemo(() => mapById(model.functions), [model.functions]);
+  const unitsByParentId = useMemo(() => {
+    const mapped = new Map<string, OrganizationUnitItem[]>();
+    for (const unit of model.units) {
+      const key = unit.parent_id || "";
+      mapped.set(key, [...(mapped.get(key) ?? []), unit]);
+    }
+    for (const units of mapped.values()) units.sort((left, right) => left.name.localeCompare(right.name));
+    return mapped;
+  }, [model.units]);
 
   const hasDirtyDraft = isSluggedDirty(unitTypeDraft) ||
     isSluggedDirty(structureDraft) ||
@@ -396,6 +443,10 @@ export default function OrganizationsPage({
     if (!sectionSet.has(active)) setActive(firstAvailableSection);
   }, [active, firstAvailableSection, sectionSet]);
 
+  useEffect(() => {
+    if (selectedUnitId && !unitById.has(selectedUnitId)) setSelectedUnitId("");
+  }, [selectedUnitId, unitById]);
+
   const runAction = useCallback(async (action: () => Promise<unknown>, successMessage = ""): Promise<boolean> => {
     setBusy(true);
     setError("");
@@ -422,6 +473,14 @@ export default function OrganizationsPage({
     setFunctionTypeDraft(emptyFunctionTypeDraft());
     setFunctionDraft(emptyFunctionDraft());
     setAssignmentDraft(emptyAssignmentDraft());
+    setEditingUnitTypeId(null);
+    setEditingStructureId(null);
+    setEditingRelationTypeId(null);
+    setEditingUnitId(null);
+    setEditingRelationId(null);
+    setEditingFunctionTypeId(null);
+    setEditingFunctionId(null);
+    setEditingAssignmentId(null);
   }, []);
 
   function rejectMissingName(): Promise<boolean> {
@@ -438,20 +497,33 @@ export default function OrganizationsPage({
     event?.preventDefault();
     if (!canWriteModel) return rejectMissingWritePermission();
     if (!unitTypeDraft.name.trim()) return rejectMissingName();
-    const ok = await runAction(() => createUnitType(settings, sluggedPayload(unitTypeDraft)), "i18n:govoplan-organizations.unit_type_added.e017dc8c");
-    if (ok) setUnitTypeDraft(emptySluggedDraft());
+    const ok = await runAction(
+      () => editingUnitTypeId ? patchUnitType(settings, editingUnitTypeId, sluggedPatchPayload(unitTypeDraft)) : createUnitType(settings, sluggedPayload(unitTypeDraft)),
+      editingUnitTypeId ? "i18n:govoplan-organizations.unit_type_updated.6d8f2a16" : "i18n:govoplan-organizations.unit_type_added.e017dc8c"
+    );
+    if (ok) {
+      setUnitTypeDraft(emptySluggedDraft());
+      setEditingUnitTypeId(null);
+    }
     return ok;
-  }, [canWriteModel, runAction, settings, unitTypeDraft]);
+  }, [canWriteModel, editingUnitTypeId, runAction, settings, unitTypeDraft]);
 
   const submitStructure = useCallback(async (event?: FormEvent): Promise<boolean> => {
     event?.preventDefault();
     if (!canWriteModel) return rejectMissingWritePermission();
     if (!structureDraft.name.trim()) return rejectMissingName();
     const payload: StructureCreatePayload = { ...sluggedPayload(structureDraft), structure_kind: structureDraft.structure_kind };
-    const ok = await runAction(() => createStructure(settings, payload), "i18n:govoplan-organizations.structure_added.f6cf8e74");
-    if (ok) setStructureDraft(emptyStructureDraft());
+    const patchPayload: Partial<StructureCreatePayload> = { ...sluggedPatchPayload(structureDraft), structure_kind: structureDraft.structure_kind };
+    const ok = await runAction(
+      () => editingStructureId ? patchStructure(settings, editingStructureId, patchPayload) : createStructure(settings, payload),
+      editingStructureId ? "i18n:govoplan-organizations.structure_updated.2591e75f" : "i18n:govoplan-organizations.structure_added.f6cf8e74"
+    );
+    if (ok) {
+      setStructureDraft(emptyStructureDraft());
+      setEditingStructureId(null);
+    }
     return ok;
-  }, [canWriteModel, runAction, settings, structureDraft]);
+  }, [canWriteModel, editingStructureId, runAction, settings, structureDraft]);
 
   const submitRelationType = useCallback(async (event?: FormEvent): Promise<boolean> => {
     event?.preventDefault();
@@ -465,10 +537,24 @@ export default function OrganizationsPage({
       is_hierarchical: relationTypeDraft.is_hierarchical,
       allow_cycles: relationTypeDraft.allow_cycles
     };
-    const ok = await runAction(() => createRelationType(settings, payload), "i18n:govoplan-organizations.relation_type_added.6f1edff1");
-    if (ok) setRelationTypeDraft(emptyRelationTypeDraft());
+    const patchPayload: Partial<RelationTypeCreatePayload> = {
+      ...sluggedPatchPayload(relationTypeDraft),
+      structure_id: textOrNull(relationTypeDraft.structure_id),
+      source_unit_type_id: textOrNull(relationTypeDraft.source_unit_type_id),
+      target_unit_type_id: textOrNull(relationTypeDraft.target_unit_type_id),
+      is_hierarchical: relationTypeDraft.is_hierarchical,
+      allow_cycles: relationTypeDraft.allow_cycles
+    };
+    const ok = await runAction(
+      () => editingRelationTypeId ? patchRelationType(settings, editingRelationTypeId, patchPayload) : createRelationType(settings, payload),
+      editingRelationTypeId ? "i18n:govoplan-organizations.relation_type_updated.5ac57ec7" : "i18n:govoplan-organizations.relation_type_added.6f1edff1"
+    );
+    if (ok) {
+      setRelationTypeDraft(emptyRelationTypeDraft());
+      setEditingRelationTypeId(null);
+    }
     return ok;
-  }, [canWriteModel, relationTypeDraft, runAction, settings]);
+  }, [canWriteModel, editingRelationTypeId, relationTypeDraft, runAction, settings]);
 
   const submitUnit = useCallback(async (event?: FormEvent): Promise<boolean> => {
     event?.preventDefault();
@@ -479,10 +565,21 @@ export default function OrganizationsPage({
       unit_type_id: textOrNull(unitDraft.unit_type_id),
       parent_id: textOrNull(unitDraft.parent_id)
     };
-    const ok = await runAction(() => createUnit(settings, payload), "i18n:govoplan-organizations.unit_added.760a8512");
-    if (ok) setUnitDraft(emptyUnitDraft());
+    const patchPayload: Partial<UnitCreatePayload> = {
+      ...sluggedPatchPayload(unitDraft),
+      unit_type_id: textOrNull(unitDraft.unit_type_id),
+      parent_id: textOrNull(unitDraft.parent_id)
+    };
+    const ok = await runAction(
+      () => editingUnitId ? patchUnit(settings, editingUnitId, patchPayload) : createUnit(settings, payload),
+      editingUnitId ? "i18n:govoplan-organizations.unit_updated.15f02216" : "i18n:govoplan-organizations.unit_added.760a8512"
+    );
+    if (ok) {
+      setUnitDraft(emptyUnitDraft());
+      setEditingUnitId(null);
+    }
     return ok;
-  }, [canWriteUnits, runAction, settings, unitDraft]);
+  }, [canWriteUnits, editingUnitId, runAction, settings, unitDraft]);
 
   const submitRelation = useCallback(async (event?: FormEvent): Promise<boolean> => {
     event?.preventDefault();
@@ -492,10 +589,17 @@ export default function OrganizationsPage({
       return false;
     }
     const payload: RelationCreatePayload = { ...relationDraft, settings: {} };
-    const ok = await runAction(() => createRelation(settings, payload), "i18n:govoplan-organizations.relation_added.ca90461a");
-    if (ok) setRelationDraft(emptyRelationDraft());
+    const patchPayload: Partial<RelationCreatePayload> = { ...relationDraft };
+    const ok = await runAction(
+      () => editingRelationId ? patchRelation(settings, editingRelationId, patchPayload) : createRelation(settings, payload),
+      editingRelationId ? "i18n:govoplan-organizations.relation_updated.c6212776" : "i18n:govoplan-organizations.relation_added.ca90461a"
+    );
+    if (ok) {
+      setRelationDraft(emptyRelationDraft());
+      setEditingRelationId(null);
+    }
     return ok;
-  }, [canWriteUnits, relationDraft, runAction, settings]);
+  }, [canWriteUnits, editingRelationId, relationDraft, runAction, settings]);
 
   const submitFunctionType = useCallback(async (event?: FormEvent): Promise<boolean> => {
     event?.preventDefault();
@@ -507,10 +611,22 @@ export default function OrganizationsPage({
       delegable: functionTypeDraft.delegable,
       act_in_place_allowed: functionTypeDraft.act_in_place_allowed
     };
-    const ok = await runAction(() => createFunctionType(settings, payload), "i18n:govoplan-organizations.function_type_added.2cd9e899");
-    if (ok) setFunctionTypeDraft(emptyFunctionTypeDraft());
+    const patchPayload: Partial<FunctionTypeCreatePayload> = {
+      ...sluggedPatchPayload(functionTypeDraft),
+      organization_unit_type_id: textOrNull(functionTypeDraft.organization_unit_type_id),
+      delegable: functionTypeDraft.delegable,
+      act_in_place_allowed: functionTypeDraft.act_in_place_allowed
+    };
+    const ok = await runAction(
+      () => editingFunctionTypeId ? patchFunctionType(settings, editingFunctionTypeId, patchPayload) : createFunctionType(settings, payload),
+      editingFunctionTypeId ? "i18n:govoplan-organizations.function_type_updated.1a4f29f6" : "i18n:govoplan-organizations.function_type_added.2cd9e899"
+    );
+    if (ok) {
+      setFunctionTypeDraft(emptyFunctionTypeDraft());
+      setEditingFunctionTypeId(null);
+    }
     return ok;
-  }, [canWriteModel, functionTypeDraft, runAction, settings]);
+  }, [canWriteModel, editingFunctionTypeId, functionTypeDraft, runAction, settings]);
 
   const submitFunction = useCallback(async (event?: FormEvent): Promise<boolean> => {
     event?.preventDefault();
@@ -527,10 +643,23 @@ export default function OrganizationsPage({
       delegable: functionDraft.delegable,
       act_in_place_allowed: functionDraft.act_in_place_allowed
     };
-    const ok = await runAction(() => createFunction(settings, payload), "i18n:govoplan-organizations.function_added.e2266702");
-    if (ok) setFunctionDraft(emptyFunctionDraft());
+    const patchPayload: Partial<FunctionCreatePayload> = {
+      ...sluggedPatchPayload(functionDraft),
+      organization_unit_id: functionDraft.organization_unit_id,
+      function_type_id: textOrNull(functionDraft.function_type_id),
+      delegable: functionDraft.delegable,
+      act_in_place_allowed: functionDraft.act_in_place_allowed
+    };
+    const ok = await runAction(
+      () => editingFunctionId ? patchFunction(settings, editingFunctionId, patchPayload) : createFunction(settings, payload),
+      editingFunctionId ? "i18n:govoplan-organizations.function_updated.65016009" : "i18n:govoplan-organizations.function_added.e2266702"
+    );
+    if (ok) {
+      setFunctionDraft(emptyFunctionDraft());
+      setEditingFunctionId(null);
+    }
     return ok;
-  }, [canWriteFunctions, functionDraft, runAction, settings]);
+  }, [canWriteFunctions, editingFunctionId, functionDraft, runAction, settings]);
 
   const submitAssignment = useCallback(async (event?: FormEvent): Promise<boolean> => {
     event?.preventDefault();
@@ -550,10 +679,16 @@ export default function OrganizationsPage({
       is_active: assignmentDraft.is_active,
       settings: {}
     };
-    const ok = await runAction(() => createFunctionAssignment(settings, payload), "i18n:govoplan-organizations.assignment_added.94263d1b");
-    if (ok) setAssignmentDraft(emptyAssignmentDraft());
+    const ok = await runAction(
+      () => editingAssignmentId ? patchFunctionAssignment(settings, editingAssignmentId, payload) : createFunctionAssignment(settings, payload),
+      editingAssignmentId ? "i18n:govoplan-organizations.assignment_updated.680b6e33" : "i18n:govoplan-organizations.assignment_added.94263d1b"
+    );
+    if (ok) {
+      setAssignmentDraft(emptyAssignmentDraft());
+      setEditingAssignmentId(null);
+    }
     return ok;
-  }, [assignmentDraft, canAssignFunctions, runAction, settings]);
+  }, [assignmentDraft, canAssignFunctions, editingAssignmentId, runAction, settings]);
 
   const saveDrafts = useCallback(async (): Promise<boolean> => {
     if (isSluggedDirty(unitTypeDraft) && !(await submitUnitType())) return false;
@@ -624,12 +759,103 @@ export default function OrganizationsPage({
     void runAction(() => patchFunctionAssignment(settings, item.id, { is_active: !item.is_active }));
   }, [runAction, settings]);
 
+  const editUnitType = useCallback((item: OrganizationUnitTypeItem) => {
+    setEditingUnitTypeId(item.id);
+    setUnitTypeDraft(sluggedDraftFrom(item));
+    setActive("model");
+  }, []);
+
+  const editStructure = useCallback((item: OrganizationStructureItem) => {
+    setEditingStructureId(item.id);
+    setStructureDraft({ ...sluggedDraftFrom(item), structure_kind: item.structure_kind as OrganizationStructureKind });
+    setActive("model");
+  }, []);
+
+  const editRelationType = useCallback((item: OrganizationRelationTypeItem) => {
+    setEditingRelationTypeId(item.id);
+    setRelationTypeDraft({
+      ...sluggedDraftFrom(item),
+      structure_id: item.structure_id ?? "",
+      source_unit_type_id: item.source_unit_type_id ?? "",
+      target_unit_type_id: item.target_unit_type_id ?? "",
+      is_hierarchical: item.is_hierarchical,
+      allow_cycles: item.allow_cycles
+    });
+    setActive("model");
+  }, []);
+
+  const editUnit = useCallback((item: OrganizationUnitItem) => {
+    setEditingUnitId(item.id);
+    setSelectedUnitId(item.id);
+    setUnitDraft({ ...sluggedDraftFrom(item), unit_type_id: item.unit_type_id ?? "", parent_id: item.parent_id ?? "" });
+    setActive("units");
+  }, []);
+
+  const addSubunit = useCallback((item: OrganizationUnitItem) => {
+    setSelectedUnitId(item.id);
+    setEditingUnitId(null);
+    setUnitDraft({ ...emptyUnitDraft(), parent_id: item.id });
+    setActive("units");
+  }, []);
+
+  const editRelation = useCallback((item: OrganizationRelationItem) => {
+    setEditingRelationId(item.id);
+    setRelationDraft({
+      structure_id: item.structure_id,
+      relation_type_id: item.relation_type_id,
+      source_unit_id: item.source_unit_id,
+      target_unit_id: item.target_unit_id,
+      is_active: item.is_active
+    });
+    setActive("relations");
+  }, []);
+
+  const editFunctionType = useCallback((item: OrganizationFunctionTypeItem) => {
+    setEditingFunctionTypeId(item.id);
+    setFunctionTypeDraft({
+      ...sluggedDraftFrom(item),
+      organization_unit_type_id: item.organization_unit_type_id ?? "",
+      delegable: item.delegable,
+      act_in_place_allowed: item.act_in_place_allowed
+    });
+    setActive("model");
+  }, []);
+
+  const editFunction = useCallback((item: OrganizationFunctionItem) => {
+    setEditingFunctionId(item.id);
+    setSelectedUnitId(item.organization_unit_id);
+    setFunctionDraft({
+      ...sluggedDraftFrom(item),
+      organization_unit_id: item.organization_unit_id,
+      function_type_id: item.function_type_id ?? "",
+      delegable: item.delegable,
+      act_in_place_allowed: item.act_in_place_allowed
+    });
+    setActive("functions");
+  }, []);
+
+  const editAssignment = useCallback((item: OrganizationFunctionAssignmentItem) => {
+    setEditingAssignmentId(item.id);
+    setSelectedUnitId(item.organization_unit_id);
+    setAssignmentDraft({
+      identity_id: item.identity_id,
+      account_id: item.account_id ?? "",
+      function_id: item.function_id,
+      applies_to_subunits: item.applies_to_subunits,
+      source: item.source,
+      delegated_from_assignment_id: item.delegated_from_assignment_id ?? "",
+      acting_for_account_id: item.acting_for_account_id ?? "",
+      is_active: item.is_active
+    });
+    setActive("assignments");
+  }, []);
+
   const unitTypeColumns: DataGridColumn<OrganizationUnitTypeItem>[] = [
     { id: "name", header: "i18n:govoplan-organizations.name.709a2322", minWidth: 180, sortable: true, filterable: true, value: (row) => row.name },
     { id: "slug", header: "i18n:govoplan-organizations.slug.094da9b9", width: 160, sortable: true, filterable: true, value: (row) => row.slug },
     { id: "status", header: "i18n:govoplan-organizations.status.bae7d5be", width: 120, render: (row) => activeStatus(row.is_active) },
     { id: "description", header: "i18n:govoplan-organizations.description.55f8ebc8", minWidth: 220, value: (row) => row.description ?? "" },
-    { id: "actions", header: "", width: 130, sticky: "end", render: (row) => <ActiveToggleButton item={row} disabled={!canWriteModel || busy} onToggle={() => toggleUnitType(row)} /> }
+    { id: "actions", header: "", width: 220, sticky: "end", render: (row) => <RowActions item={row} disabled={!canWriteModel || busy} onEdit={() => editUnitType(row)} onToggle={() => toggleUnitType(row)} /> }
   ];
 
   const structureColumns: DataGridColumn<OrganizationStructureItem>[] = [
@@ -637,7 +863,7 @@ export default function OrganizationsPage({
     { id: "kind", header: "i18n:govoplan-organizations.kind.794c9d9c", width: 140, sortable: true, filterable: true, value: (row) => row.structure_kind },
     { id: "slug", header: "i18n:govoplan-organizations.slug.094da9b9", width: 160, value: (row) => row.slug },
     { id: "status", header: "i18n:govoplan-organizations.status.bae7d5be", width: 120, render: (row) => activeStatus(row.is_active) },
-    { id: "actions", header: "", width: 130, sticky: "end", render: (row) => <ActiveToggleButton item={row} disabled={!canWriteModel || busy} onToggle={() => toggleStructure(row)} /> }
+    { id: "actions", header: "", width: 220, sticky: "end", render: (row) => <RowActions item={row} disabled={!canWriteModel || busy} onEdit={() => editStructure(row)} onToggle={() => toggleStructure(row)} /> }
   ];
 
   const relationTypeColumns: DataGridColumn<OrganizationRelationTypeItem>[] = [
@@ -647,7 +873,7 @@ export default function OrganizationsPage({
     { id: "target", header: "i18n:govoplan-organizations.target_unit.a1507d86", minWidth: 170, render: (row) => optionalLabel(unitTypeById.get(row.target_unit_type_id || "")?.name) },
     { id: "hierarchical", header: "i18n:govoplan-organizations.hierarchical.8964f313", width: 130, render: (row) => activeStatus(row.is_hierarchical) },
     { id: "status", header: "i18n:govoplan-organizations.status.bae7d5be", width: 120, render: (row) => activeStatus(row.is_active) },
-    { id: "actions", header: "", width: 130, sticky: "end", render: (row) => <ActiveToggleButton item={row} disabled={!canWriteModel || busy} onToggle={() => toggleRelationType(row)} /> }
+    { id: "actions", header: "", width: 220, sticky: "end", render: (row) => <RowActions item={row} disabled={!canWriteModel || busy} onEdit={() => editRelationType(row)} onToggle={() => toggleRelationType(row)} /> }
   ];
 
   const unitColumns: DataGridColumn<OrganizationUnitItem>[] = [
@@ -656,7 +882,7 @@ export default function OrganizationsPage({
     { id: "parent", header: "i18n:govoplan-organizations.parent_unit.1986c35e", minWidth: 180, render: (row) => optionalLabel(unitById.get(row.parent_id || "")?.name) },
     { id: "slug", header: "i18n:govoplan-organizations.slug.094da9b9", width: 160, value: (row) => row.slug },
     { id: "status", header: "i18n:govoplan-organizations.status.bae7d5be", width: 120, render: (row) => activeStatus(row.is_active) },
-    { id: "actions", header: "", width: 130, sticky: "end", render: (row) => <ActiveToggleButton item={row} disabled={!canWriteUnits || busy} onToggle={() => toggleUnit(row)} /> }
+    { id: "actions", header: "", width: 220, sticky: "end", render: (row) => <RowActions item={row} disabled={!canWriteUnits || busy} onEdit={() => editUnit(row)} onToggle={() => toggleUnit(row)} /> }
   ];
 
   const relationColumns: DataGridColumn<OrganizationRelationItem>[] = [
@@ -665,7 +891,7 @@ export default function OrganizationsPage({
     { id: "source", header: "i18n:govoplan-organizations.source_unit.2fbd8baa", minWidth: 190, render: (row) => optionalLabel(unitById.get(row.source_unit_id)?.name) },
     { id: "target", header: "i18n:govoplan-organizations.target_unit.a1507d86", minWidth: 190, render: (row) => optionalLabel(unitById.get(row.target_unit_id)?.name) },
     { id: "status", header: "i18n:govoplan-organizations.status.bae7d5be", width: 120, render: (row) => activeStatus(row.is_active) },
-    { id: "actions", header: "", width: 130, sticky: "end", render: (row) => <ActiveToggleButton item={row} disabled={!canWriteUnits || busy} onToggle={() => toggleRelation(row)} /> }
+    { id: "actions", header: "", width: 220, sticky: "end", render: (row) => <RowActions item={row} disabled={!canWriteUnits || busy} onEdit={() => editRelation(row)} onToggle={() => toggleRelation(row)} /> }
   ];
 
   const functionTypeColumns: DataGridColumn<OrganizationFunctionTypeItem>[] = [
@@ -674,7 +900,7 @@ export default function OrganizationsPage({
     { id: "delegable", header: "i18n:govoplan-organizations.delegable.b4f0137d", width: 120, render: (row) => activeStatus(row.delegable) },
     { id: "actInPlace", header: "i18n:govoplan-organizations.act_in_place.49b942bd", width: 140, render: (row) => activeStatus(row.act_in_place_allowed) },
     { id: "status", header: "i18n:govoplan-organizations.status.bae7d5be", width: 120, render: (row) => activeStatus(row.is_active) },
-    { id: "actions", header: "", width: 130, sticky: "end", render: (row) => <ActiveToggleButton item={row} disabled={!canWriteModel || busy} onToggle={() => toggleFunctionType(row)} /> }
+    { id: "actions", header: "", width: 220, sticky: "end", render: (row) => <RowActions item={row} disabled={!canWriteModel || busy} onEdit={() => editFunctionType(row)} onToggle={() => toggleFunctionType(row)} /> }
   ];
 
   const functionColumns: DataGridColumn<OrganizationFunctionItem>[] = [
@@ -683,7 +909,7 @@ export default function OrganizationsPage({
     { id: "type", header: "i18n:govoplan-organizations.function_type.501fe7c0", minWidth: 180, render: (row) => optionalLabel(functionTypeById.get(row.function_type_id || "")?.name) },
     { id: "delegable", header: "i18n:govoplan-organizations.delegable.b4f0137d", width: 120, render: (row) => activeStatus(row.delegable) },
     { id: "status", header: "i18n:govoplan-organizations.status.bae7d5be", width: 120, render: (row) => activeStatus(row.is_active) },
-    { id: "actions", header: "", width: 130, sticky: "end", render: (row) => <ActiveToggleButton item={row} disabled={!canWriteFunctions || busy} onToggle={() => toggleFunction(row)} /> }
+    { id: "actions", header: "", width: 220, sticky: "end", render: (row) => <RowActions item={row} disabled={!canWriteFunctions || busy} onEdit={() => editFunction(row)} onToggle={() => toggleFunction(row)} /> }
   ];
 
   const assignmentColumns: DataGridColumn<OrganizationFunctionAssignmentItem>[] = [
@@ -693,11 +919,15 @@ export default function OrganizationsPage({
     { id: "subunits", header: "i18n:govoplan-organizations.applies_to_subunits.7a15f741", width: 150, render: (row) => activeStatus(row.applies_to_subunits) },
     { id: "source", header: "i18n:govoplan-organizations.source.6da13add", width: 130, value: (row) => row.source },
     { id: "status", header: "i18n:govoplan-organizations.status.bae7d5be", width: 120, render: (row) => activeStatus(row.is_active) },
-    { id: "actions", header: "", width: 130, sticky: "end", render: (row) => <ActiveToggleButton item={row} disabled={!canAssignFunctions || busy} onToggle={() => toggleAssignment(row)} /> }
+    { id: "actions", header: "", width: 220, sticky: "end", render: (row) => <RowActions item={row} disabled={!canAssignFunctions || busy} onEdit={() => editAssignment(row)} onToggle={() => toggleAssignment(row)} /> }
   ];
 
   const canWriteActive = active === "model" ? canWriteModel : active === "units" || active === "relations" ? canWriteUnits : active === "functions" ? canWriteFunctions : canAssignFunctions;
 
+  function cancelEditButton(onCancel: () => void) {
+    return <Button type="button" variant="ghost" onClick={onCancel} disabled={busy}>i18n:govoplan-organizations.cancel_edit.309c2a6f</Button>;
+  }
+
   const content = (
         <div className={`${mode === "workspace" ? "content-pad " : ""}organizations-page ${mode === "admin" ? "organizations-admin-page" : ""}`.trim()}>
           <div className="page-heading split organizations-heading">
@@ -754,7 +984,10 @@ export default function OrganizationsPage({
           <Card title="i18n:govoplan-organizations.unit_types.c7afc174">
             <form className="organizations-form-grid" onSubmit={(event) => void submitUnitType(event)}>
               <SluggedFields draft={unitTypeDraft} onChange={setUnitTypeDraft} disabled={!canWriteModel || busy} />
-              <Button className="wide" type="submit" variant="primary" disabled={!canWriteModel || busy}>i18n:govoplan-organizations.add_unit_type.58f2c05a</Button>
+              <div className="organizations-form-actions wide">
+                <Button type="submit" variant="primary" disabled={!canWriteModel || busy}>{editingUnitTypeId ? "i18n:govoplan-organizations.update_unit_type.b96fc0ad" : "i18n:govoplan-organizations.add_unit_type.58f2c05a"}</Button>
+                {editingUnitTypeId && cancelEditButton(() => { setEditingUnitTypeId(null); setUnitTypeDraft(emptySluggedDraft()); })}
+              </div>
             </form>
           </Card>
           <Card title="i18n:govoplan-organizations.unit_types.c7afc174">
@@ -770,7 +1003,10 @@ export default function OrganizationsPage({
                   {STRUCTURE_KINDS.map((item) => <option key={item.value} value={item.value}>{item.label}</option>)}
                 </select>
               </FormField>
-              <Button className="wide" type="submit" variant="primary" disabled={!canWriteModel || busy}>i18n:govoplan-organizations.add_structure.b722042a</Button>
+              <div className="organizations-form-actions wide">
+                <Button type="submit" variant="primary" disabled={!canWriteModel || busy}>{editingStructureId ? "i18n:govoplan-organizations.update_structure.b2e25446" : "i18n:govoplan-organizations.add_structure.b722042a"}</Button>
+                {editingStructureId && cancelEditButton(() => { setEditingStructureId(null); setStructureDraft(emptyStructureDraft()); })}
+              </div>
             </form>
           </Card>
           <Card title="i18n:govoplan-organizations.structures.f9b7f3b4">
@@ -803,7 +1039,10 @@ export default function OrganizationsPage({
                 <label><input type="checkbox" checked={relationTypeDraft.is_hierarchical} disabled={!canWriteModel || busy} onChange={(event) => setRelationTypeDraft({ ...relationTypeDraft, is_hierarchical: event.target.checked })} /> i18n:govoplan-organizations.hierarchical.8964f313</label>
                 <label><input type="checkbox" checked={relationTypeDraft.allow_cycles} disabled={!canWriteModel || busy} onChange={(event) => setRelationTypeDraft({ ...relationTypeDraft, allow_cycles: event.target.checked })} /> i18n:govoplan-organizations.allow_cycles.31327578</label>
               </div>
-              <Button className="wide" type="submit" variant="primary" disabled={!canWriteModel || busy}>i18n:govoplan-organizations.add_relation_type.2ad19d03</Button>
+              <div className="organizations-form-actions wide">
+                <Button type="submit" variant="primary" disabled={!canWriteModel || busy}>{editingRelationTypeId ? "i18n:govoplan-organizations.update_relation_type.e6e7f30c" : "i18n:govoplan-organizations.add_relation_type.2ad19d03"}</Button>
+                {editingRelationTypeId && cancelEditButton(() => { setEditingRelationTypeId(null); setRelationTypeDraft(emptyRelationTypeDraft()); })}
+              </div>
             </form>
           </Card>
           <Card title="i18n:govoplan-organizations.relation_types.e5890528">
@@ -824,7 +1063,10 @@ export default function OrganizationsPage({
                 <label><input type="checkbox" checked={functionTypeDraft.delegable} disabled={!canWriteModel || busy} onChange={(event) => setFunctionTypeDraft({ ...functionTypeDraft, delegable: event.target.checked })} /> i18n:govoplan-organizations.delegable.b4f0137d</label>
                 <label><input type="checkbox" checked={functionTypeDraft.act_in_place_allowed} disabled={!canWriteModel || busy} onChange={(event) => setFunctionTypeDraft({ ...functionTypeDraft, act_in_place_allowed: event.target.checked })} /> i18n:govoplan-organizations.act_in_place.49b942bd</label>
               </div>
-              <Button className="wide" type="submit" variant="primary" disabled={!canWriteModel || busy}>i18n:govoplan-organizations.add_function_type.90d793f1</Button>
+              <div className="organizations-form-actions wide">
+                <Button type="submit" variant="primary" disabled={!canWriteModel || busy}>{editingFunctionTypeId ? "i18n:govoplan-organizations.update_function_type.0b7e07d3" : "i18n:govoplan-organizations.add_function_type.90d793f1"}</Button>
+                {editingFunctionTypeId && cancelEditButton(() => { setEditingFunctionTypeId(null); setFunctionTypeDraft(emptyFunctionTypeDraft()); })}
+              </div>
             </form>
           </Card>
           <Card title="i18n:govoplan-organizations.function_types.172c01fe">
@@ -835,30 +1077,75 @@ export default function OrganizationsPage({
     );
   }
 
+  function renderUnitTreeNodes(parentId = "", depth = 0, seen: ReadonlySet<string> = new Set()): JSX.Element[] {
+    return (unitsByParentId.get(parentId) ?? []).flatMap((unit) => {
+      if (seen.has(unit.id)) return [];
+      const nextSeen = new Set(seen);
+      nextSeen.add(unit.id);
+      return [
+      <div className="organizations-tree-row" key={unit.id}>
+        <button
+          type="button"
+          className={`organizations-tree-node ${selectedUnitId === unit.id ? "active" : ""}`.trim()}
+          style={{ paddingLeft: `${10 + depth * 18}px` }}
+          onClick={() => setSelectedUnitId(unit.id)}
+        >
+          <strong>{unit.name}</strong>
+          <span>{unitTypeById.get(unit.unit_type_id || "")?.name ?? "i18n:govoplan-organizations.no_unit_type.73e799f5"}</span>
+        </button>
+        <Button type="button" variant="ghost" disabled={!canWriteUnits || busy} onClick={() => addSubunit(unit)} title="i18n:govoplan-organizations.add_subunit.8256a8f7">
+          <Plus size={16} aria-hidden="true" /> i18n:govoplan-organizations.add_subunit.8256a8f7
+        </Button>
+      </div>,
+      ...renderUnitTreeNodes(unit.id, depth + 1, nextSeen)
+      ];
+    });
+  }
+
   function renderUnitsSection() {
     return (
-      <div className="organizations-section-grid">
-        <Card title="i18n:govoplan-organizations.add_unit.8fa12fb1">
-          <form className="organizations-form-grid" onSubmit={(event) => void submitUnit(event)}>
-            <SluggedFields draft={unitDraft} onChange={setUnitDraft} disabled={!canWriteUnits || busy} />
-            <FormField label="i18n:govoplan-organizations.unit_type.9e62810d">
-              <select value={unitDraft.unit_type_id} disabled={!canWriteUnits || busy} onChange={(event) => setUnitDraft({ ...unitDraft, unit_type_id: event.target.value })}>
-                <option value="">i18n:govoplan-organizations.none.334c4a4c</option>
-                {model.unit_types.map((item) => <option key={item.id} value={item.id}>{item.name}</option>)}
-              </select>
-            </FormField>
-            <FormField label="i18n:govoplan-organizations.parent_unit.1986c35e">
-              <select value={unitDraft.parent_id} disabled={!canWriteUnits || busy} onChange={(event) => setUnitDraft({ ...unitDraft, parent_id: event.target.value })}>
-                <option value="">i18n:govoplan-organizations.none.334c4a4c</option>
-                {model.units.map((item) => <option key={item.id} value={item.id}>{item.name}</option>)}
-              </select>
-            </FormField>
-            <Button className="wide" type="submit" variant="primary" disabled={!canWriteUnits || busy}>i18n:govoplan-organizations.add_unit.8fa12fb1</Button>
-          </form>
-        </Card>
-        <Card title="i18n:govoplan-organizations.units.e14d0d92">
-          <DataGrid id="organizations-units" rows={model.units} columns={unitColumns} getRowKey={(row) => row.id} emptyText="i18n:govoplan-organizations.no_units_found.eea2dd0c" initialFit="container" />
+      <div className="organizations-editor-grid">
+        <Card title="i18n:govoplan-organizations.organization_tree.e5bfb195">
+          <div className="organizations-tree-toolbar">
+            <Button type="button" variant="secondary" disabled={!canWriteUnits || busy} onClick={() => { setEditingUnitId(null); setUnitDraft(emptyUnitDraft()); }} title="i18n:govoplan-organizations.add_root_unit.1ef8a9f5">
+              <Plus size={16} aria-hidden="true" /> i18n:govoplan-organizations.add_root_unit.1ef8a9f5
+            </Button>
+          </div>
+          <div className="organizations-tree-list">
+            {model.units.length ? renderUnitTreeNodes() : <p className="muted small-note">i18n:govoplan-organizations.no_units_found.eea2dd0c</p>}
+          </div>
         </Card>
+        <div className="organizations-table-stack">
+          <Card title="i18n:govoplan-organizations.add_unit.8fa12fb1">
+            <form className="organizations-form-grid" onSubmit={(event) => void submitUnit(event)}>
+              <SluggedFields draft={unitDraft} onChange={setUnitDraft} disabled={!canWriteUnits || busy} />
+              <FormField label="i18n:govoplan-organizations.unit_type.9e62810d">
+                <select value={unitDraft.unit_type_id} disabled={!canWriteUnits || busy} onChange={(event) => setUnitDraft({ ...unitDraft, unit_type_id: event.target.value })}>
+                  <option value="">i18n:govoplan-organizations.none.334c4a4c</option>
+                  {model.unit_types.map((item) => <option key={item.id} value={item.id}>{item.name}</option>)}
+                </select>
+              </FormField>
+              <FormField label="i18n:govoplan-organizations.parent_unit.1986c35e">
+                <select value={unitDraft.parent_id} disabled={!canWriteUnits || busy} onChange={(event) => setUnitDraft({ ...unitDraft, parent_id: event.target.value })}>
+                  <option value="">i18n:govoplan-organizations.none.334c4a4c</option>
+                  {model.units.filter((item) => item.id !== editingUnitId).map((item) => <option key={item.id} value={item.id}>{item.name}</option>)}
+                </select>
+              </FormField>
+              {unitDraft.parent_id && (
+                <p className="organizations-field-note wide">
+                  i18n:govoplan-organizations.selected_parent.0e013d44 <strong>{unitById.get(unitDraft.parent_id)?.name ?? unitDraft.parent_id}</strong>
+                </p>
+              )}
+              <div className="organizations-form-actions wide">
+                <Button type="submit" variant="primary" disabled={!canWriteUnits || busy}>{editingUnitId ? "i18n:govoplan-organizations.update_unit.67e2500f" : "i18n:govoplan-organizations.add_unit.8fa12fb1"}</Button>
+                {editingUnitId && cancelEditButton(() => { setEditingUnitId(null); setUnitDraft(emptyUnitDraft()); })}
+              </div>
+            </form>
+          </Card>
+          <Card title="i18n:govoplan-organizations.units.e14d0d92">
+            <DataGrid id="organizations-units" rows={model.units} columns={unitColumns} getRowKey={(row) => row.id} emptyText="i18n:govoplan-organizations.no_units_found.eea2dd0c" initialFit="container" />
+          </Card>
+        </div>
       </div>
     );
   }
@@ -896,7 +1183,10 @@ export default function OrganizationsPage({
               <input type="checkbox" checked={relationDraft.is_active} disabled={!canWriteUnits || busy} onChange={(event) => setRelationDraft({ ...relationDraft, is_active: event.target.checked })} />
               <span>i18n:govoplan-organizations.active.a733b809</span>
             </label>
-            <Button className="wide" type="submit" variant="primary" disabled={!canWriteUnits || busy}>i18n:govoplan-organizations.add_relation.6b6e67ea</Button>
+            <div className="organizations-form-actions wide">
+              <Button type="submit" variant="primary" disabled={!canWriteUnits || busy}>{editingRelationId ? "i18n:govoplan-organizations.update_relation.4c44ce83" : "i18n:govoplan-organizations.add_relation.6b6e67ea"}</Button>
+              {editingRelationId && cancelEditButton(() => { setEditingRelationId(null); setRelationDraft(emptyRelationDraft()); })}
+            </div>
           </form>
         </Card>
         <Card title="i18n:govoplan-organizations.relations.1c796711">
@@ -928,7 +1218,10 @@ export default function OrganizationsPage({
               <label><input type="checkbox" checked={functionDraft.delegable} disabled={!canWriteFunctions || busy} onChange={(event) => setFunctionDraft({ ...functionDraft, delegable: event.target.checked })} /> i18n:govoplan-organizations.delegable.b4f0137d</label>
               <label><input type="checkbox" checked={functionDraft.act_in_place_allowed} disabled={!canWriteFunctions || busy} onChange={(event) => setFunctionDraft({ ...functionDraft, act_in_place_allowed: event.target.checked })} /> i18n:govoplan-organizations.act_in_place.49b942bd</label>
             </div>
-            <Button className="wide" type="submit" variant="primary" disabled={!canWriteFunctions || busy}>i18n:govoplan-organizations.add_function.6abafee0</Button>
+            <div className="organizations-form-actions wide">
+              <Button type="submit" variant="primary" disabled={!canWriteFunctions || busy}>{editingFunctionId ? "i18n:govoplan-organizations.update_function.504f03e5" : "i18n:govoplan-organizations.add_function.6abafee0"}</Button>
+              {editingFunctionId && cancelEditButton(() => { setEditingFunctionId(null); setFunctionDraft(emptyFunctionDraft()); })}
+            </div>
           </form>
         </Card>
         <Card title="i18n:govoplan-organizations.functions.805dc49b">
@@ -962,7 +1255,10 @@ export default function OrganizationsPage({
               <label><input type="checkbox" checked={assignmentDraft.applies_to_subunits} disabled={!canAssignFunctions || busy} onChange={(event) => setAssignmentDraft({ ...assignmentDraft, applies_to_subunits: event.target.checked })} /> i18n:govoplan-organizations.applies_to_subunits.7a15f741</label>
               <label><input type="checkbox" checked={assignmentDraft.is_active} disabled={!canAssignFunctions || busy} onChange={(event) => setAssignmentDraft({ ...assignmentDraft, is_active: event.target.checked })} /> i18n:govoplan-organizations.active.a733b809</label>
             </div>
-            <Button className="wide" type="submit" variant="primary" disabled={!canAssignFunctions || busy}>i18n:govoplan-organizations.add_assignment.6682f5f5</Button>
+            <div className="organizations-form-actions wide">
+              <Button type="submit" variant="primary" disabled={!canAssignFunctions || busy}>{editingAssignmentId ? "i18n:govoplan-organizations.update_assignment.bf130723" : "i18n:govoplan-organizations.add_assignment.6682f5f5"}</Button>
+              {editingAssignmentId && cancelEditButton(() => { setEditingAssignmentId(null); setAssignmentDraft(emptyAssignmentDraft()); })}
+            </div>
           </form>
         </Card>
         <Card title="i18n:govoplan-organizations.function_assignments.4c5c6dae">
diff --git a/webui/src/i18n/generatedTranslations.ts b/webui/src/i18n/generatedTranslations.ts
index 89f42ec..15bb273 100644
--- a/webui/src/i18n/generatedTranslations.ts
+++ b/webui/src/i18n/generatedTranslations.ts
@@ -9,26 +9,41 @@ export const generatedTranslations: PlatformTranslations = {
     "i18n:govoplan-organizations.add_function_type.90d793f1": "Add function type",
     "i18n:govoplan-organizations.add_relation.6b6e67ea": "Add relation",
     "i18n:govoplan-organizations.add_relation_type.2ad19d03": "Add relation type",
+    "i18n:govoplan-organizations.add_root_unit.1ef8a9f5": "Add root unit",
     "i18n:govoplan-organizations.add_structure.b722042a": "Add structure",
+    "i18n:govoplan-organizations.add_subunit.8256a8f7": "Add subunit",
     "i18n:govoplan-organizations.add_unit.8fa12fb1": "Add unit",
     "i18n:govoplan-organizations.add_unit_type.58f2c05a": "Add unit type",
     "i18n:govoplan-organizations.allow_cycles.31327578": "Allow cycles",
     "i18n:govoplan-organizations.applies_to_subunits.7a15f741": "Applies to subunits",
     "i18n:govoplan-organizations.assignment_added.94263d1b": "Function assignment added.",
+    "i18n:govoplan-organizations.assignment_updated.680b6e33": "Function assignment updated.",
     "i18n:govoplan-organizations.assignments.278f513e": "Assignments",
+    "i18n:govoplan-organizations.audit_and_retention.3ba1d2fc": "Audit and retention",
+    "i18n:govoplan-organizations.audit_detail_level.7397355d": "Audit detail level",
+    "i18n:govoplan-organizations.audit_full.0c83669c": "Full",
+    "i18n:govoplan-organizations.audit_retention_help.42dec57d": "Controls how much organization-change detail is retained for review, troubleshooting, and evidence.",
+    "i18n:govoplan-organizations.audit_standard.785d981f": "Standard",
+    "i18n:govoplan-organizations.audit_summary.6a7d68a5": "Summary",
     "i18n:govoplan-organizations.classification.3e9f6c3a": "Classification",
+    "i18n:govoplan-organizations.allow_tenant_model_customization.2425d751": "Tenant admins may customize the organization meta-model",
+    "i18n:govoplan-organizations.change_retention_days.71bbd140": "Retain organization change detail for days",
+    "i18n:govoplan-organizations.cancel_edit.309c2a6f": "Cancel edit",
     "i18n:govoplan-organizations.concrete_model.4e9c531a": "Concrete model",
     "i18n:govoplan-organizations.deactivate.46ab070d": "Deactivate",
     "i18n:govoplan-organizations.delegable.b4f0137d": "Delegable",
     "i18n:govoplan-organizations.description.55f8ebc8": "Description",
     "i18n:govoplan-organizations.direct_assignment.2a068aac": "direct",
     "i18n:govoplan-organizations.discard_organization_drafts.766d5f46": "Discard organization drafts",
+    "i18n:govoplan-organizations.edit.7dce1220": "Edit",
     "i18n:govoplan-organizations.function.28822f3a": "Function",
     "i18n:govoplan-organizations.function_added.e2266702": "Function added.",
     "i18n:govoplan-organizations.function_assignments.4c5c6dae": "Function assignments",
     "i18n:govoplan-organizations.function_type.501fe7c0": "Function type",
     "i18n:govoplan-organizations.function_type_added.2cd9e899": "Function type added.",
+    "i18n:govoplan-organizations.function_type_updated.1a4f29f6": "Function type updated.",
     "i18n:govoplan-organizations.function_types.172c01fe": "Function types",
+    "i18n:govoplan-organizations.function_updated.65016009": "Function updated.",
     "i18n:govoplan-organizations.functions.805dc49b": "Functions",
     "i18n:govoplan-organizations.hierarchical.8964f313": "Hierarchical",
     "i18n:govoplan-organizations.hierarchy.74797f37": "Hierarchy",
@@ -37,9 +52,12 @@ export const generatedTranslations: PlatformTranslations = {
     "i18n:govoplan-organizations.inactive.09af574c": "Inactive",
     "i18n:govoplan-organizations.kind.794c9d9c": "Kind",
     "i18n:govoplan-organizations.loading_organization_model.846aa317": "Loading organization model...",
+    "i18n:govoplan-organizations.loading_organization_settings.c6008db8": "Loading organization settings...",
     "i18n:govoplan-organizations.membership.4531d86d": "Membership",
     "i18n:govoplan-organizations.meta_model.7398487c": "Meta-model",
     "i18n:govoplan-organizations.model.20f35e63": "Model",
+    "i18n:govoplan-organizations.model_governance.6aa18fd0": "Model governance",
+    "i18n:govoplan-organizations.model_governance_help.0fa69021": "These switches define whether the tenant can change its own organization model directly or must record governed change requests.",
     "i18n:govoplan-organizations.name.709a2322": "Name",
     "i18n:govoplan-organizations.name_is_required.27cd3782": "Name is required.",
     "i18n:govoplan-organizations.network.a24d31c3": "Network",
@@ -49,23 +67,33 @@ export const generatedTranslations: PlatformTranslations = {
     "i18n:govoplan-organizations.no_relation_types_found.6f90bb81": "No relation types found.",
     "i18n:govoplan-organizations.no_relations_found.4e75b11d": "No relations found.",
     "i18n:govoplan-organizations.no_structures_found.20b382d0": "No structures found.",
+    "i18n:govoplan-organizations.no_unit_type.73e799f5": "No unit type",
     "i18n:govoplan-organizations.no_unit_types_found.c81fb2a7": "No unit types found.",
     "i18n:govoplan-organizations.no_units_found.eea2dd0c": "No units found.",
     "i18n:govoplan-organizations.none.334c4a4c": "None",
     "i18n:govoplan-organizations.optional_account_id.5fcf495c": "Optional account ID",
     "i18n:govoplan-organizations.organization_model.4f924c0e": "Organization model",
     "i18n:govoplan-organizations.organization_model_admin_description.35dc9f10": "Configure tenant-local unit types, parallel structures, relation types, and function types used by the organization module.",
+    "i18n:govoplan-organizations.organization_settings.c9ab9829": "Organization settings",
+    "i18n:govoplan-organizations.organization_settings_description.35dc9f10": "Configure tenant-level governance, audit, and retention behavior for organization changes.",
+    "i18n:govoplan-organizations.organization_settings_saved.bfbcfdfa": "Organization settings saved.",
+    "i18n:govoplan-organizations.organization_tree.e5bfb195": "Organization tree",
     "i18n:govoplan-organizations.organizations.220edf64": "Organizations",
     "i18n:govoplan-organizations.organizations_intro.4e67c4bb": "Model organization types, concrete units, structures, functions, and identity-held function assignments.",
     "i18n:govoplan-organizations.parent_unit.1986c35e": "Parent unit",
     "i18n:govoplan-organizations.reactivate.58f2855d": "Reactivate",
     "i18n:govoplan-organizations.relation_added.ca90461a": "Relation added.",
+    "i18n:govoplan-organizations.relation_updated.c6212776": "Relation updated.",
     "i18n:govoplan-organizations.relation_type.d0aee2e7": "Relation type",
     "i18n:govoplan-organizations.relation_type_added.6f1edff1": "Relation type added.",
+    "i18n:govoplan-organizations.relation_type_updated.5ac57ec7": "Relation type updated.",
     "i18n:govoplan-organizations.relation_types.e5890528": "Relation types",
     "i18n:govoplan-organizations.relations.1c796711": "Relations",
     "i18n:govoplan-organizations.reload.cce71553": "Reload",
+    "i18n:govoplan-organizations.require_model_change_requests.83454cad": "Organization model changes require recorded change requests",
+    "i18n:govoplan-organizations.save_settings.913aba9f": "Save settings",
     "i18n:govoplan-organizations.save_drafts.606f9401": "Save drafts",
+    "i18n:govoplan-organizations.saving.56a2285c": "Saving...",
     "i18n:govoplan-organizations.select_function.4895a67d": "Select function",
     "i18n:govoplan-organizations.select_function_type.2f426c43": "Select function type",
     "i18n:govoplan-organizations.select_relation_type.73f92478": "Select relation type",
@@ -74,21 +102,34 @@ export const generatedTranslations: PlatformTranslations = {
     "i18n:govoplan-organizations.select_target_unit.8d607541": "Select target unit",
     "i18n:govoplan-organizations.select_unit.013bf13a": "Select unit",
     "i18n:govoplan-organizations.select_unit_type.2c71d14f": "Select unit type",
+    "i18n:govoplan-organizations.selected_parent.0e013d44": "Selected parent:",
     "i18n:govoplan-organizations.slug.094da9b9": "Slug",
     "i18n:govoplan-organizations.source.6da13add": "Source",
     "i18n:govoplan-organizations.source_unit.2fbd8baa": "Source unit",
     "i18n:govoplan-organizations.status.bae7d5be": "Status",
     "i18n:govoplan-organizations.structure.7732fb0b": "Structure",
     "i18n:govoplan-organizations.structure_added.f6cf8e74": "Structure added.",
+    "i18n:govoplan-organizations.structure_updated.2591e75f": "Structure updated.",
     "i18n:govoplan-organizations.structures.f9b7f3b4": "Structures",
     "i18n:govoplan-organizations.target_unit.a1507d86": "Target unit",
     "i18n:govoplan-organizations.type.599dcce2": "Type",
     "i18n:govoplan-organizations.unit.8fe4d595": "Unit",
     "i18n:govoplan-organizations.unit_added.760a8512": "Unit added.",
+    "i18n:govoplan-organizations.unit_updated.15f02216": "Unit updated.",
     "i18n:govoplan-organizations.unit_type.9e62810d": "Unit type",
     "i18n:govoplan-organizations.unit_type_added.e017dc8c": "Unit type added.",
+    "i18n:govoplan-organizations.unit_type_updated.6d8f2a16": "Unit type updated.",
     "i18n:govoplan-organizations.unit_types.c7afc174": "Unit types",
     "i18n:govoplan-organizations.units.e14d0d92": "Units",
+    "i18n:govoplan-organizations.unlimited.35569464": "Unlimited",
+    "i18n:govoplan-organizations.update_assignment.bf130723": "Update assignment",
+    "i18n:govoplan-organizations.update_function.504f03e5": "Update function",
+    "i18n:govoplan-organizations.update_function_type.0b7e07d3": "Update function type",
+    "i18n:govoplan-organizations.update_relation.4c44ce83": "Update relation",
+    "i18n:govoplan-organizations.update_relation_type.e6e7f30c": "Update relation type",
+    "i18n:govoplan-organizations.update_structure.b2e25446": "Update structure",
+    "i18n:govoplan-organizations.update_unit.67e2500f": "Update unit",
+    "i18n:govoplan-organizations.update_unit_type.b96fc0ad": "Update unit type",
     "i18n:govoplan-organizations.write_permission_required.8b09fd67": "You do not have write permission for this organization section."
   },
   de: {
@@ -99,26 +140,41 @@ export const generatedTranslations: PlatformTranslations = {
     "i18n:govoplan-organizations.add_function_type.90d793f1": "Funktionstyp hinzufügen",
     "i18n:govoplan-organizations.add_relation.6b6e67ea": "Beziehung hinzufügen",
     "i18n:govoplan-organizations.add_relation_type.2ad19d03": "Beziehungstyp hinzufügen",
+    "i18n:govoplan-organizations.add_root_unit.1ef8a9f5": "Wurzeleinheit hinzufügen",
     "i18n:govoplan-organizations.add_structure.b722042a": "Struktur hinzufügen",
+    "i18n:govoplan-organizations.add_subunit.8256a8f7": "Untereinheit hinzufügen",
     "i18n:govoplan-organizations.add_unit.8fa12fb1": "Einheit hinzufügen",
     "i18n:govoplan-organizations.add_unit_type.58f2c05a": "Einheitstyp hinzufügen",
     "i18n:govoplan-organizations.allow_cycles.31327578": "Zyklen erlauben",
     "i18n:govoplan-organizations.applies_to_subunits.7a15f741": "Gilt für Untereinheiten",
     "i18n:govoplan-organizations.assignment_added.94263d1b": "Funktionszuordnung hinzugefügt.",
+    "i18n:govoplan-organizations.assignment_updated.680b6e33": "Funktionszuordnung aktualisiert.",
     "i18n:govoplan-organizations.assignments.278f513e": "Zuordnungen",
+    "i18n:govoplan-organizations.audit_and_retention.3ba1d2fc": "Audit und Aufbewahrung",
+    "i18n:govoplan-organizations.audit_detail_level.7397355d": "Audit-Detailgrad",
+    "i18n:govoplan-organizations.audit_full.0c83669c": "Vollständig",
+    "i18n:govoplan-organizations.audit_retention_help.42dec57d": "Steuert, wie viele Details zu Organisationsänderungen für Prüfung, Fehlersuche und Nachweise aufbewahrt werden.",
+    "i18n:govoplan-organizations.audit_standard.785d981f": "Standard",
+    "i18n:govoplan-organizations.audit_summary.6a7d68a5": "Zusammenfassung",
     "i18n:govoplan-organizations.classification.3e9f6c3a": "Klassifikation",
+    "i18n:govoplan-organizations.allow_tenant_model_customization.2425d751": "Mandantenadmins dürfen das Organisations-Metamodell anpassen",
+    "i18n:govoplan-organizations.change_retention_days.71bbd140": "Änderungsdetails zur Organisation in Tagen aufbewahren",
+    "i18n:govoplan-organizations.cancel_edit.309c2a6f": "Bearbeitung abbrechen",
     "i18n:govoplan-organizations.concrete_model.4e9c531a": "Konkretes Modell",
     "i18n:govoplan-organizations.deactivate.46ab070d": "Deaktivieren",
     "i18n:govoplan-organizations.delegable.b4f0137d": "Delegierbar",
     "i18n:govoplan-organizations.description.55f8ebc8": "Beschreibung",
     "i18n:govoplan-organizations.direct_assignment.2a068aac": "direkt",
     "i18n:govoplan-organizations.discard_organization_drafts.766d5f46": "Organisationsentwürfe verwerfen",
+    "i18n:govoplan-organizations.edit.7dce1220": "Bearbeiten",
     "i18n:govoplan-organizations.function.28822f3a": "Funktion",
     "i18n:govoplan-organizations.function_added.e2266702": "Funktion hinzugefügt.",
     "i18n:govoplan-organizations.function_assignments.4c5c6dae": "Funktionszuordnungen",
     "i18n:govoplan-organizations.function_type.501fe7c0": "Funktionstyp",
     "i18n:govoplan-organizations.function_type_added.2cd9e899": "Funktionstyp hinzugefügt.",
+    "i18n:govoplan-organizations.function_type_updated.1a4f29f6": "Funktionstyp aktualisiert.",
     "i18n:govoplan-organizations.function_types.172c01fe": "Funktionstypen",
+    "i18n:govoplan-organizations.function_updated.65016009": "Funktion aktualisiert.",
     "i18n:govoplan-organizations.functions.805dc49b": "Funktionen",
     "i18n:govoplan-organizations.hierarchical.8964f313": "Hierarchisch",
     "i18n:govoplan-organizations.hierarchy.74797f37": "Hierarchie",
@@ -127,9 +183,12 @@ export const generatedTranslations: PlatformTranslations = {
     "i18n:govoplan-organizations.inactive.09af574c": "Inaktiv",
     "i18n:govoplan-organizations.kind.794c9d9c": "Art",
     "i18n:govoplan-organizations.loading_organization_model.846aa317": "Organisationsmodell wird geladen...",
+    "i18n:govoplan-organizations.loading_organization_settings.c6008db8": "Organisationseinstellungen werden geladen...",
     "i18n:govoplan-organizations.membership.4531d86d": "Mitgliedschaft",
     "i18n:govoplan-organizations.meta_model.7398487c": "Metamodell",
     "i18n:govoplan-organizations.model.20f35e63": "Modell",
+    "i18n:govoplan-organizations.model_governance.6aa18fd0": "Modell-Governance",
+    "i18n:govoplan-organizations.model_governance_help.0fa69021": "Diese Schalter legen fest, ob der Mandant sein Organisationsmodell direkt ändern darf oder geregelte Änderungsanträge erfassen muss.",
     "i18n:govoplan-organizations.name.709a2322": "Name",
     "i18n:govoplan-organizations.name_is_required.27cd3782": "Name ist erforderlich.",
     "i18n:govoplan-organizations.network.a24d31c3": "Netzwerk",
@@ -139,23 +198,33 @@ export const generatedTranslations: PlatformTranslations = {
     "i18n:govoplan-organizations.no_relation_types_found.6f90bb81": "Keine Beziehungstypen gefunden.",
     "i18n:govoplan-organizations.no_relations_found.4e75b11d": "Keine Beziehungen gefunden.",
     "i18n:govoplan-organizations.no_structures_found.20b382d0": "Keine Strukturen gefunden.",
+    "i18n:govoplan-organizations.no_unit_type.73e799f5": "Kein Einheitstyp",
     "i18n:govoplan-organizations.no_unit_types_found.c81fb2a7": "Keine Einheitstypen gefunden.",
     "i18n:govoplan-organizations.no_units_found.eea2dd0c": "Keine Einheiten gefunden.",
     "i18n:govoplan-organizations.none.334c4a4c": "Keine",
     "i18n:govoplan-organizations.optional_account_id.5fcf495c": "Optionale Konto-ID",
     "i18n:govoplan-organizations.organization_model.4f924c0e": "Organisationsmodell",
     "i18n:govoplan-organizations.organization_model_admin_description.35dc9f10": "Konfiguriere mandantenbezogene Einheitstypen, parallele Strukturen, Beziehungstypen und Funktionstypen des Organisationsmoduls.",
+    "i18n:govoplan-organizations.organization_settings.c9ab9829": "Organisationseinstellungen",
+    "i18n:govoplan-organizations.organization_settings_description.35dc9f10": "Konfiguriere Governance, Audit und Aufbewahrung für Organisationsänderungen auf Mandantenebene.",
+    "i18n:govoplan-organizations.organization_settings_saved.bfbcfdfa": "Organisationseinstellungen gespeichert.",
+    "i18n:govoplan-organizations.organization_tree.e5bfb195": "Organisationsbaum",
     "i18n:govoplan-organizations.organizations.220edf64": "Organisationen",
     "i18n:govoplan-organizations.organizations_intro.4e67c4bb": "Modelliere Organisationstypen, konkrete Einheiten, Strukturen, Funktionen und identitätsbezogene Funktionszuordnungen.",
     "i18n:govoplan-organizations.parent_unit.1986c35e": "Übergeordnete Einheit",
     "i18n:govoplan-organizations.reactivate.58f2855d": "Reaktivieren",
     "i18n:govoplan-organizations.relation_added.ca90461a": "Beziehung hinzugefügt.",
+    "i18n:govoplan-organizations.relation_updated.c6212776": "Beziehung aktualisiert.",
     "i18n:govoplan-organizations.relation_type.d0aee2e7": "Beziehungstyp",
     "i18n:govoplan-organizations.relation_type_added.6f1edff1": "Beziehungstyp hinzugefügt.",
+    "i18n:govoplan-organizations.relation_type_updated.5ac57ec7": "Beziehungstyp aktualisiert.",
     "i18n:govoplan-organizations.relation_types.e5890528": "Beziehungstypen",
     "i18n:govoplan-organizations.relations.1c796711": "Beziehungen",
     "i18n:govoplan-organizations.reload.cce71553": "Neu laden",
+    "i18n:govoplan-organizations.require_model_change_requests.83454cad": "Änderungen am Organisationsmodell erfordern erfasste Änderungsanträge",
+    "i18n:govoplan-organizations.save_settings.913aba9f": "Einstellungen speichern",
     "i18n:govoplan-organizations.save_drafts.606f9401": "Entwürfe speichern",
+    "i18n:govoplan-organizations.saving.56a2285c": "Speichern...",
     "i18n:govoplan-organizations.select_function.4895a67d": "Funktion auswählen",
     "i18n:govoplan-organizations.select_function_type.2f426c43": "Funktionstyp auswählen",
     "i18n:govoplan-organizations.select_relation_type.73f92478": "Beziehungstyp auswählen",
@@ -164,21 +233,34 @@ export const generatedTranslations: PlatformTranslations = {
     "i18n:govoplan-organizations.select_target_unit.8d607541": "Ziel-Einheit auswählen",
     "i18n:govoplan-organizations.select_unit.013bf13a": "Einheit auswählen",
     "i18n:govoplan-organizations.select_unit_type.2c71d14f": "Einheitstyp auswählen",
+    "i18n:govoplan-organizations.selected_parent.0e013d44": "Ausgewählte übergeordnete Einheit:",
     "i18n:govoplan-organizations.slug.094da9b9": "Slug",
     "i18n:govoplan-organizations.source.6da13add": "Quelle",
     "i18n:govoplan-organizations.source_unit.2fbd8baa": "Quell-Einheit",
     "i18n:govoplan-organizations.status.bae7d5be": "Status",
     "i18n:govoplan-organizations.structure.7732fb0b": "Struktur",
     "i18n:govoplan-organizations.structure_added.f6cf8e74": "Struktur hinzugefügt.",
+    "i18n:govoplan-organizations.structure_updated.2591e75f": "Struktur aktualisiert.",
     "i18n:govoplan-organizations.structures.f9b7f3b4": "Strukturen",
     "i18n:govoplan-organizations.target_unit.a1507d86": "Ziel-Einheit",
     "i18n:govoplan-organizations.type.599dcce2": "Typ",
     "i18n:govoplan-organizations.unit.8fe4d595": "Einheit",
     "i18n:govoplan-organizations.unit_added.760a8512": "Einheit hinzugefügt.",
+    "i18n:govoplan-organizations.unit_updated.15f02216": "Einheit aktualisiert.",
     "i18n:govoplan-organizations.unit_type.9e62810d": "Einheitstyp",
     "i18n:govoplan-organizations.unit_type_added.e017dc8c": "Einheitstyp hinzugefügt.",
+    "i18n:govoplan-organizations.unit_type_updated.6d8f2a16": "Einheitstyp aktualisiert.",
     "i18n:govoplan-organizations.unit_types.c7afc174": "Einheitstypen",
     "i18n:govoplan-organizations.units.e14d0d92": "Einheiten",
+    "i18n:govoplan-organizations.unlimited.35569464": "Unbegrenzt",
+    "i18n:govoplan-organizations.update_assignment.bf130723": "Zuordnung aktualisieren",
+    "i18n:govoplan-organizations.update_function.504f03e5": "Funktion aktualisieren",
+    "i18n:govoplan-organizations.update_function_type.0b7e07d3": "Funktionstyp aktualisieren",
+    "i18n:govoplan-organizations.update_relation.4c44ce83": "Beziehung aktualisieren",
+    "i18n:govoplan-organizations.update_relation_type.e6e7f30c": "Beziehungstyp aktualisieren",
+    "i18n:govoplan-organizations.update_structure.b2e25446": "Struktur aktualisieren",
+    "i18n:govoplan-organizations.update_unit.67e2500f": "Einheit aktualisieren",
+    "i18n:govoplan-organizations.update_unit_type.b96fc0ad": "Einheitstyp aktualisieren",
     "i18n:govoplan-organizations.write_permission_required.8b09fd67": "Du hast keine Schreibberechtigung für diesen Organisationsbereich."
   }
 };
diff --git a/webui/src/module.ts b/webui/src/module.ts
index 4d23898..831c376 100644
--- a/webui/src/module.ts
+++ b/webui/src/module.ts
@@ -21,11 +21,11 @@ const translations = {
 const organizationAdminSections: AdminSectionsUiCapability = {
   sections: [
     {
-      id: "tenant-organization-model",
-      label: "i18n:govoplan-organizations.organization_model.4f924c0e",
+      id: "tenant-organization-settings",
+      label: "i18n:govoplan-organizations.organization_settings.c9ab9829",
       group: "TENANT",
       order: 85,
-      anyOf: ["organizations:model:read", "admin:settings:read"],
+      anyOf: ["organizations:settings:read", "admin:settings:read"],
       render: ({ settings, auth }) => createElement(OrganizationsAdminPanel, { settings, auth })
     }
   ]
diff --git a/webui/src/styles/organizations.css b/webui/src/styles/organizations.css
index 39cf0ad..61caa86 100644
--- a/webui/src/styles/organizations.css
+++ b/webui/src/styles/organizations.css
@@ -14,6 +14,11 @@
   max-width: 100%;
 }
 
+.organizations-settings-grid {
+  display: grid;
+  gap: 18px;
+}
+
 .organizations-heading {
   margin-bottom: 4px;
 }
@@ -33,6 +38,13 @@
   align-items: start;
 }
 
+.organizations-editor-grid {
+  display: grid;
+  grid-template-columns: minmax(260px, 340px) minmax(0, 1fr);
+  gap: 18px;
+  align-items: start;
+}
+
 .organizations-form-panel,
 .organizations-table-panel {
   min-width: 0;
@@ -53,6 +65,18 @@
   grid-column: 1 / -1;
 }
 
+.organizations-form-actions,
+.organizations-row-actions {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  flex-wrap: wrap;
+}
+
+.organizations-row-actions {
+  justify-content: flex-end;
+}
+
 .organizations-check-list {
   display: grid;
   gap: 10px;
@@ -73,6 +97,51 @@
   gap: 18px;
 }
 
+.organizations-tree-toolbar {
+  display: flex;
+  justify-content: flex-start;
+  margin-bottom: 12px;
+}
+
+.organizations-tree-list {
+  display: grid;
+  gap: 4px;
+  max-height: 640px;
+  overflow: auto;
+}
+
+.organizations-tree-row {
+  display: grid;
+  grid-template-columns: minmax(0, 1fr) auto;
+  align-items: center;
+  gap: 6px;
+}
+
+.organizations-tree-node {
+  display: grid;
+  gap: 2px;
+  width: 100%;
+  min-width: 0;
+  padding: 8px 10px;
+  border: 1px solid transparent;
+  border-radius: 7px;
+  background: transparent;
+  color: var(--text);
+  text-align: left;
+  cursor: pointer;
+}
+
+.organizations-tree-node:hover,
+.organizations-tree-node.active {
+  border-color: var(--line);
+  background: var(--surface-muted, #f6f7f9);
+}
+
+.organizations-tree-node span {
+  color: var(--muted);
+  font-size: 12px;
+}
+
 .organizations-field-note {
   margin: 8px 0 0;
   color: var(--muted);
@@ -90,7 +159,8 @@
 }
 
 @media (max-width: 1100px) {
-  .organizations-section-grid {
+  .organizations-section-grid,
+  .organizations-editor-grid {
     grid-template-columns: 1fr;
   }
 }