feat: task management implementation

.claude/openspec/architecture/adr-001-data-layer.md

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+- ALL domain data → OpenRegister objects. NO custom Entity/Mapper for domain data.
+- App config → `IAppConfig`. NOT OpenRegister.
+- Cross-entity references: OpenRegister relations (register+schema+objectId). NO foreign keys.
+  MUST NOT store foreign keys or embed full objects.
+
+### Schema standards
+
+- Schemas: PascalCase, schema.org vocabulary, explicit types + required flags + description field.
+- MUST NOT invent custom property names when a schema.org equivalent exists.
+- Contact schemas MUST align with vCard properties (fn, email, tel, adr).
+- Dutch government fields SHOULD use a mapping layer translating between international standards
+  and Dutch specs — do not hardcode Dutch field names as primary.
+- Schema changes that remove or rename properties are BREAKING. Adding optional properties is non-breaking.
+
+### Register templates
+
+- Location: `lib/Settings/{app}_register.json` (OpenAPI 3.0 + `x-openregister` extensions).
+- Three template categories:
+  - **App configuration** — define data models (schemas/registers/views/mappings).
+    Mark with `x-openregister.type: "application"`.
+  - **Mock data** — fictional but realistic seed data for dev/test.
+    Mark with `x-openregister.type: "mock"`.
+  - **Government standards** — aligned to Dutch API specs (BAG, BRP, KVK, DSO).
+- Import mechanism: `ConfigurationService::importFromApp(appId, data, version, force)` →
+  `ImportHandler::importFromApp()`. Called from repair step or `SettingsLoadService`.
+- Idempotency: re-importing with `force: false` MUST NOT create duplicates. Match by slug
+  using `ObjectService::searchObjects` with `_rbac: false` and `_multitenancy: false`.
+  Use `version_compare` for skip logic.
+
+### Seed data
+
+Apps that store data in OpenRegister are empty on first install. An empty app cannot be
+meaningfully tested — there are no objects to view, search, filter, or interact with.
+This blocks both automated browser testing and manual QA. The Loadable Register Template
+pattern (see Register templates above) already supports seed data via `components.objects[]`
+with the `@self` envelope.
+
+**Requirements:**
+
+- Every app using OpenRegister MUST include 3-5 realistic objects per schema in
+  `lib/Settings/{app}_register.json`.
+- Use `@self` envelope: `{ "@self": { "register": ..., "schema": ..., "slug": ... }, ...properties }`.
+  Register/schema MUST match keys; slug is unique human-readable identifier for matching.
+- Use general organisation data (municipality, consultancy, travel agency, non-profit) —
+  NOT context-specific. Varied, realistic field values.
+- Mock data quality: real Dutch street names, valid postcodes (`[1-9][0-9]{3}[A-Z]{2}`),
+  correct municipality/KVK codes, BSNs that pass 11-proef. Fictional but distinguishable from real.
+- Cross-register consistency: BRP→BAG, KVK→BAG, DSO→BAG references must be valid.
+- Loaded on install alongside schemas via same `importFromApp()` pipeline.
+- MUST be idempotent — re-importing skips existing objects matched by slug.
+
+**In OpenSpec artifacts:**
+
+- **In design.md**: MUST include a Seed Data section when change introduces/modifies schemas —
+  define seed objects per schema with concrete field values and related items (files, notes, tasks, contacts).
+- **In tasks.md**: MUST include a seed data generation task when change introduces/modifies schemas.
+
+**Exceptions** (no seed data required):
+
+- **nldesign** — has no OpenRegister schemas.
+- **ExApp sidecar wrappers** (openklant, opentalk, openzaak, valtimo, n8n-nextcloud) — proxy
+  external services and do not use OpenRegister.
+- **nextcloud-vue** — shared library, no seed data applicable.
+- Changes that only modify frontend components or non-schema backend logic (e.g., settings,
+  permissions) do not require seed data.
+
+**Limitations:** OpenRegister's `ImportHandler` currently supports only flat seed objects.
+Related items (files, notes, tasks, contacts) linked through the relation system are tracked
+on the product roadmap. Until then, seed data is limited to object properties defined in schemas.
+
+### Deduplication check
+
+- Before proposing new capability: search `openspec/specs/` and `openregister/lib/Service/` for overlap
+  with ObjectService, RegisterService, SchemaService, ConfigurationService, and shared Vue components.
+- If similar capability exists: MUST reference it and explain why new code is needed rather than extending.
+- Proposals duplicating existing functionality without justification MUST be rejected.
+- **In design.md**: MUST include a "Reuse Analysis" section listing existing OpenRegister services leveraged.
+- **In tasks.md**: MUST include a "Deduplication Check" task verifying no overlap — document findings
+  even if "no overlap found".
+
+### Schema migrations
+
+- Breaking schema changes → new migration in repair step. NEVER modify existing migrations.
+
+### OpenRegister + @conduction/nextcloud-vue — DO NOT REBUILD
+
+The platform provides 258+ backend methods and 69+ frontend components. Apps ONLY build
+custom logic for domain-specific business rules. Everything below is provided for FREE.
+
+**CRUD & Data Management** (use ObjectService + CnIndexPage + CnDetailPage):
+- Single & bulk create, read, update, delete — `ObjectService.saveObject()`, `deleteObject()`
+- List with pagination, sorting, filtering — `ObjectService.findAll()` + `CnDataTable`
+- Schema-driven forms — `CnFormDialog` (auto-generates from schema) or `CnAdvancedFormDialog`
+- Detail views — `CnDetailPage` with `CnDetailGrid`, `CnDetailCard` sections
+- Record merging/deduplication — `ObjectService.mergeObjects()`
+- Object locking — `ObjectService.lockObject()` / `unlockObject()`
+
+**Import & Export** (use ImportService/ExportService + CnMassImportDialog/CnMassExportDialog):
+- CSV, Excel, JSON import with intelligent field mapping — `ImportService`
+- CSV, Excel, JSON export with column selection — `ExportService`
+- Bulk import with validation and progress — `CnMassImportDialog`
+- Filtered export with format picker — `CnMassExportDialog`
+- NO custom import dialogs, parsers, upload handlers, or export controllers
+
+**Search & Discovery** (use IndexService + CnFilterBar + CnFacetSidebar):
+- Full-text search with field weighting — `IndexService`
+- Faceted navigation with counts — `FacetBuilder` + `CnFacetSidebar`
+- Semantic search with embeddings — `VectorizationService`
+- Hybrid search (keyword + semantic) — automatic
+- Search analytics — `SearchTrailService` (popular terms, activity)
+- NO custom search endpoints, query builders, or search pages
+
+**File Management** (use FileService + CnObjectSidebar):
+- Upload (single/multipart), download, share links — `FileService`
+- File tagging, public/private toggle — `FileService`
+- Bulk download as ZIP — `createObjectFilesZip()`
+- Text extraction from PDFs/Office docs — `TextExtractionService`
+- File tab in object sidebar — `CnObjectSidebar` → `CnFilesTab`
+- NO custom file upload components, file controllers, or download handlers
+
+**Audit & Compliance** (use AuditTrailService + CnObjectSidebar):
+- Full change tracking with before/after snapshots — automatic
+- Audit trail tab — `CnObjectSidebar` → `CnAuditTrailTab`
+- GDPR data subject access requests — `inzageverzoek()`, `verwerkingsregister()`
+- Audit export and analytics — `AuditTrailController`
+- NO custom audit logging, change tracking, or compliance controllers
+
+**Dashboard & Analytics** (use CnDashboardPage + CnChartWidget + CnStatsBlock):
+- Drag-drop widget dashboard — `CnDashboardPage` with GridStack
+- KPI cards — `CnKpiGrid`, `CnStatsBlock`, `CnStatsPanel`
+- Charts (line/bar/pie/donut) — `CnChartWidget` (ApexCharts)
+- Data tables as widgets — `CnTableWidget`
+- Editable data grids — `CnObjectDataWidget`
+- NO custom dashboard layouts, chart components, or KPI cards
+
+**Forms & Dialogs** (use CnFormDialog + schema-driven generation):
+- Auto-generated create/edit forms — `CnFormDialog` reads schema → generates fields
+- JSON/metadata editing — `CnAdvancedFormDialog` with Properties/Data/Metadata tabs
+- Schema editor — `CnSchemaFormDialog`
+- Delete/Copy/Mass operations — `CnDeleteDialog`, `CnCopyDialog`, `CnMassDeleteDialog`
+- NO custom form components, validation logic, or dialog wrappers
+
+**Navigation & Pagination** (use CnPagination + CnActionsBar + useListView):
+- Pagination control with size selector — `CnPagination`
+- Action bar (add, search, toggle views) — `CnActionsBar`
+- List state management — `useListView` composable (handles search, filter, sort, page)
+- Detail state management — `useDetailView` composable
+- NO custom pagination logic, debounced search, or list state management
+
+**Authorization & RBAC** (use AuthorizationService + PropertyRbacHandler):
+- Role-based access control — `AuthorizationService`
+- Field-level permissions — `PropertyRbacHandler`
+- Object-level restrictions — `PermissionHandler`
+- Authorization audit — `AuthorizationAuditService`
+- NO custom permission checks, role systems, or access control middleware
+
+**Webhooks & Events** (use WebhookService):
+- Create, test, retry webhooks — `WebhookService`
+- CloudEvents format — automatic
+- Event subscriptions — selective per schema/action
+- NO custom webhook controllers or event dispatchers
+
+**Notifications & Activity** (use NotificationService + ActivityService):
+- Nextcloud notifications — `NotificationService`
+- Activity feed — `ActivityService`
+- Calendar events — `CalendarEventService`
+- Deck/Kanban cards — `DeckCardService`
+
+**Store & State** (use createObjectStore + plugins):
+- Object stores — `createObjectStore(name)` generates Pinia CRUD store
+- Store plugins: `auditTrails`, `files`, `lifecycle`, `relations`, `search`, `selection`
+- Column/field/filter generation from schema — `columnsFromSchema()`, `fieldsFromSchema()`
+- NO custom Pinia stores for CRUD, Vuex, or manual API call management
+
+**Chat & AI** (use ChatService):
+- Multi-turn conversation — `ChatService`
+- RAG-based knowledge retrieval — `ContextRetrievalHandler`
+- LLM response generation — `ResponseGenerationHandler`
+
+**Data Retention & Archival** (use ArchivalService):
+- Legal hold — `LegalHoldService`
+- Destruction schedules — `DestructionService`
+- Retention policies — `RetentionService`
+
+**Semantic & Hybrid Search** (use SolrController + SettingsController):
+- Semantic search via vector embeddings — `SettingsController.semanticSearch()`
+- Hybrid search (keyword + semantic combined) — `SolrController.hybridSearch()`
+- Vector embedding generation — `VectorizationService`
+- NO custom search algorithms — configure via OpenRegister settings
+
+**GraphQL API** (use GraphQLController):
+- Query objects across schemas via GraphQL — `GraphQLController.execute()`
+- Alternative to REST for complex cross-entity queries
+
+**Organization / Multi-Tenancy** (use OrganisationController):
+- Organization CRUD — `OrganisationController`
+- Tenant-scoped data isolation — automatic via `TenantLifecycleService`
+- NO custom multi-tenancy logic
+
+**Task & Workflow Management** (use TasksController + WorkflowEngineController):
+- Task creation and tracking — `TasksController`
+- Workflow orchestration — `WorkflowEngineRegistry`
+- Scheduled workflows — `ScheduledWorkflowController`
+- NO custom task/workflow systems
+
+**Text Extraction** (use FileTextController):
+- Extract text from PDFs and Office docs — `TextExtractionService`
+- Entity recognition (PII detection) — `EntityRecognitionHandler`
+- Content anonymization — automatic
+
+**Timeline & Stages** (use CnTimelineStages):
+- Workflow progression visualization — `CnTimelineStages` component
+- Stage tracking with status colors
+
+### What apps SHOULD build (custom business logic only):
+- External API integrations (SAP, Peppol, TenderNed, etc.)
+- PDF/document generation with business-specific templates
+- Workflow triggers and business rules specific to the domain
+- Notification dispatch with app-specific event types
+- Custom settings pages with app-specific configuration
+- Background jobs for domain-specific processing

.claude/openspec/architecture/adr-002-api.md

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+- URL pattern: `/index.php/apps/{app}/api/{resource}` — lowercase plural, hyphens.
+- Methods: GET=read, POST=create, PUT=update, DELETE=remove. No custom methods.
+- Pagination: support `_page` + `_limit`. Response includes `total`, `page`, `pages`.
+- Errors: appropriate HTTP status + `message` field. NO stack traces in responses.
+- Auth: Nextcloud built-in only. NO custom login/session/token flows.
+- Public endpoints: annotate `#[PublicPage]` + `#[NoCSRFRequired]`. Register CORS OPTIONS route.

.claude/openspec/architecture/adr-003-backend.md

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+- **Controller → Service → Mapper** (strict 3-layer). Controllers NEVER call mappers directly.
+- Controllers: thin (<10 lines/method). Routing + validation + response only.
+- Services: ALL business logic. Stateless — no instance state between requests.
+- Mappers: DB CRUD only. No business logic.
+- DI: constructor injection with `private readonly`. NO `\OC::$server` or static locators.
+- Entity setters: POSITIONAL args only. `$e->setName('val')` — NEVER `$e->setName(name: 'val')`.
+  (`__call` passes `['name' => val]` but `setter()` uses `$args[0]`.)
+- Routes: `appinfo/routes.php`. Specific routes BEFORE wildcard `{slug}` routes.
+- Config: `IAppConfig` with sensitive flag for secrets. NEVER read DB directly.
+- Lifecycle: schema init via repair steps (`IRepairStep`), background via job queue, events via dispatcher.
+- **Spec traceability**: every class and public method MUST have `@spec` PHPDoc tag(s) linking to
+  the OpenSpec change that caused it: `@spec openspec/changes/{name}/tasks.md#task-N`.
+  Multiple `@spec` tags allowed (code touched by multiple changes). File-level `@spec` in header docblock.
+  This enables: code → docblock → spec traceability alongside code → git blame → commit → issue → spec.