Phase 0 Complete: Tasks 0.7-0.20

- 0.7: UI-Design-Richtlinien (docs/ui-design-guidelines.md, 535 lines)
- 0.8: Theme-Customization Backend (4 theme fields, migration 0023)
- 0.9: Theme-Customization Frontend (SettingsTheme.tsx, themeStore.ts, live preview)
- 0.10: RBAC-Audit (4 plugins secured, 53 routes with require_permission)
- 0.11: LiteLLM-Cleanup (llm_client.py migrated from httpx to litellm)
- 0.12: KI-Agent-Framework docs (plugin-development-guide.md, agent_capabilities field)
- 0.13: Heartbeat configurable (ProactiveSettings, migration 0024, frontend UI)
- 0.14: Unified Search Field-Level RBAC (resolve_permissions + filter_fields_by_permission)
- 0.15: Undo/History-System (EntityHistory model, service, routes, migration 0025, HistoryViewer)
- 0.16: Storage Backend (LocalStorage + S3Storage, DMS/attachments/mail updated)
- 0.17: Import/Export unified Contact fields (firstname, surname, email_1, phone_1)
- 0.18: .gitignore & Config-Cleanup (webui→frontend, python-jose removed, .env untracked)
- 0.19: Mail-Salt Security-Fix (per-account random salt, migration 0026)
- 0.20: AGPL replaced (PyMuPDF→pypdf, OnlyOffice→Collabora, LICENSE + THIRD_PARTY_LICENSES.md)

app/plugins/builtins/ai_proactive/schemas.py

@@ -73,6 +73,9 @@ class SettingsResponse(BaseModel):
     confidence_threshold: float
     rate_limit_seconds: int
     model: str
+    heartbeat_enabled: bool = True
+    heartbeat_interval_seconds: int = 300
+    heartbeat_target_room: str = "Live KI"
     available_models: list[str] = Field(default_factory=lambda: [
         'ollama/deepseek-v4-flash',
         'ollama/deepseek-v4-pro',
@@ -90,6 +93,9 @@ class SettingsUpdate(BaseModel):
     confidence_threshold: float | None = None
     rate_limit_seconds: int | None = None
     model: str | None = None
+    heartbeat_enabled: bool | None = None
+    heartbeat_interval_seconds: int | None = None
+    heartbeat_target_room: str | None = None
 
 
 class StatsResponse(BaseModel):