Phase 3.5: Automation & Agents Plugin

Neues automation Plugin (app/plugins/builtins/automation/):
- 7 DB-Modelle: AgentDefinition, AgentVersion, AutomationDefinition,
  AutomationVersion, AutomationCronJob, AgentRun, AutomationRun
- Migration 0001_initial.sql mit allen Tabellen + RLS
- PluginManifest erweitert: agent_definitions, automation_templates,
  cron_jobs, heartbeat_configs, miniapps Contribution-Felder
- 21 API-Endpoints: /api/v1/automation (CRUD, execute, dry-run,
  runs, versions, restore, settings, miniapps) + /api/v1/agents
  (CRUD, execute, test-run, runs, versions, restore, tools, send-message)

Backend Features:
- Cron-Scheduler (scheduler.py): ARQ-basiert, liest CronJob-Tabelle,
  enqueued run_agent/run_automation, croniter fuer next_run_at
- Workflow-Timeout-Worker (workflow_timeout.py): prueft abgelaufene
  WorkflowInstances, setzt cancelled, sendet Notification
- Agent Runner (agent_runner.py): LiteLLM + ToolRegistry, proactive/
  reactive mode, Rate-Limiting, Budget-Limit, Infinite-Loop-Detection
- Automation Execution Engine (execution_engine.py): Condition
  evaluation (eq/ne/gt/lt/contains/exists), Actions (api_call/
  notification/workflow_start), Dry-Run mode
- Agent-to-Agent Communication (agent_comm.py): send_agent_message
  tool, kommunikation plugin integration
- Plugin-Beitraege: register/unregister on activate/deactivate,
  Konfliktloesung mit Plugin-Name als Prefix
- Heartbeat-Migration: ai_proactive heartbeat als Cron-Job
- Versionshistorie: Auto-Versioning bei Updates, Restore-Endpoint
- Settings: GET/PATCH /api/v1/automation/settings
- ARQ Worker: 11 functions, 2 cron_jobs (scheduler_tick 30s,
  check_workflow_timeouts 5min)

Frontend:
- AutomationDashboard.tsx: Automation Builder UI mit Trigger,
  Conditions, Actions, Execute, Dry-Run, Run-History, Versions
- AgentDashboard.tsx: Agent Builder UI mit Model, Tools, Prompt,
  Heartbeat, Rate-Limits, Execute, Test-Run, Agent-Chat
- AutomationSettings.tsx: Settings + MiniApp-Builder
- automation.ts: 24 React Query Hooks
- automation.ts types: TypeScript Interfaces
- routes/index.tsx: /automation, /agents, /settings/automation

Tests:
- 22 Frontend-Tests (AutomationDashboard, AgentDashboard, API) — alle bestanden
- Backend-Tests: test_automation.py (CRUD, versions, conditions, dry-run, rate-limiting)
- TSC: keine neuen Errors (nur pre-existing Dms.tsx)
- croniter dependency installiert

frontend/src/types/automation.ts

@@ -0,0 +1,108 @@
+/**
+ * TypeScript interfaces for Automation & Agents module.
+ * Matches backend schemas from /api/v1/automation and /api/v1/agents.
+ */
+
+export interface AutomationCondition {
+  field: string;
+  operator: string;
+  value: string;
+}
+
+export interface AutomationAction {
+  type: 'api_call' | 'notification' | 'workflow_start';
+  config: Record<string, unknown>;
+}
+
+export interface AutomationDefinition {
+  id: string;
+  name: string;
+  description?: string;
+  trigger_type: 'event' | 'schedule' | 'manual';
+  trigger_config?: Record<string, unknown>;
+  conditions?: AutomationCondition[];
+  actions?: AutomationAction[];
+  active: boolean;
+  dry_run: boolean;
+  created_at: string;
+  updated_at: string;
+}
+
+export interface AutomationRun {
+  id: string;
+  automation_id: string;
+  status: 'running' | 'completed' | 'failed' | 'cancelled';
+  started_at: string;
+  completed_at?: string;
+  result?: unknown;
+  error?: string;
+}
+
+export interface AutomationVersion {
+  id: string;
+  automation_id: string;
+  version: number;
+  created_at: string;
+  data: AutomationDefinition;
+}
+
+export interface AgentDefinition {
+  id: string;
+  name: string;
+  description?: string;
+  model: string;
+  system_prompt?: string;
+  tools?: string[];
+  heartbeat_interval: number;
+  mode: 'proactive' | 'reactive';
+  max_executions_per_hour: number;
+  max_duration: number;
+  budget_limit: number;
+  active: boolean;
+  created_at: string;
+  updated_at: string;
+}
+
+export interface AgentRun {
+  id: string;
+  agent_id: string;
+  status: 'running' | 'completed' | 'failed' | 'cancelled';
+  started_at: string;
+  completed_at?: string;
+  result?: unknown;
+  error?: string;
+}
+
+export interface AgentVersion {
+  id: string;
+  agent_id: string;
+  version: number;
+  created_at: string;
+  data: AgentDefinition;
+}
+
+export interface AgentTool {
+  name: string;
+  description: string;
+}
+
+export interface AutomationSettings {
+  default_llm_model: string;
+  heartbeat_default_interval: number;
+  max_concurrent_agents: number;
+  log_level: 'debug' | 'info' | 'warning' | 'error';
+}
+
+export interface MiniAppDef {
+  app_id: string;
+  name: string;
+  icon: string;
+  description: string;
+  plugin_name: string;
+  render_schema: Record<string, unknown>;
+}
+
+export type RecentRun = (AutomationRun | AgentRun) & {
+  type: 'automation' | 'agent';
+  name?: string;
+};