feat: add dashboard API with quick links and widgets

- Dashboard domain with Quick Links CRUD + reorder endpoints
- Dashboard widgets management endpoints
- Database migrations for quick_links and dashboard_widgets tables
- Static file controller for Organizr widgets
- Default local user when OIDC is disabled
- Domain-based architecture refactor (src/domains/, src/shared/)
- Test suite updated for new structure (285 tests passing)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/domains/health/controller.py

@@ -0,0 +1,228 @@
+"""
+Health Controller
+
+Provides service health and information endpoints
+"""
+from fastapi import APIRouter, Response
+from fastapi.responses import JSONResponse
+
+from src.shared.base import BaseController
+from src.shared.config import get_settings
+from src.shared.logging import get_logger
+from src.shared.database import get_database
+
+logger = get_logger(__name__)
+
+
+class HealthController(BaseController):
+    """
+    Controller for service health and information
+
+    Provides endpoints for:
+    - Service information and status
+    - Health checks
+    """
+
+    def __init__(self):
+        super().__init__(prefix="", tags=["Health"])
+
+    def create_router(self) -> APIRouter:
+        """Create and configure the router"""
+        router = APIRouter(tags=self.tags)
+        settings = get_settings()
+
+        @router.get(
+            "/",
+            summary="Service information",
+            response_class=JSONResponse
+        )
+        async def root():
+            """
+            Get service information and health status
+
+            Returns basic information about the API service and available endpoints.
+            """
+            logger.debug("Root endpoint accessed")
+            return {
+                "service": settings.app_name,
+                "version": settings.app_version,
+                "status": "healthy",
+                "docs": "/docs"
+            }
+
+        @router.get(
+            "/health",
+            summary="Health check",
+            response_class=JSONResponse
+        )
+        async def health_check():
+            """
+            Fast health check endpoint for container orchestration
+
+            Returns a 200 OK immediately if the service is running.
+            Does NOT check backend connectivity (use /health/full for that).
+            Used by Docker, Kubernetes, and load balancers for liveness probes.
+            """
+            return {
+                "status": "healthy",
+                "version": settings.app_version
+            }
+
+        @router.get(
+            "/health/full",
+            summary="Fast health check for Docker",
+        )
+        async def full_health_check(response: Response):
+            """
+            Fast health check for container orchestration (Docker/K8s).
+
+            Checks component availability WITHOUT running expensive operations.
+            Returns 200 OK if all components are available, otherwise 503.
+
+            For detailed diagnostics, use /health/diagnostics instead.
+            """
+            import time
+            start_time = time.time()
+
+            # Import here to avoid circular imports
+            from src.models.ollama_client import get_ollama_client
+
+            # Check 1: Ollama connection + verify agent model is available
+            ollama_client = get_ollama_client()
+            ollama_healthy = False
+            ollama_error = None
+            model_available = False
+
+            try:
+                # Ping Ollama
+                ollama_healthy = await ollama_client.health_check()
+
+                # Verify the agent model is pulled and check what's currently loaded
+                models_info = {}
+                if ollama_healthy:
+                    try:
+                        models_response = await ollama_client.list_models()
+                        available_models = [m.get('name', '') for m in models_response.get('models', [])]
+                        model_available = settings.agent_model in available_models
+
+                        # Get info about currently loaded models (those with size in memory)
+                        loaded_models = [
+                            m.get('name', '') for m in models_response.get('models', [])
+                            if m.get('size', 0) > 0
+                        ]
+
+                        models_info = {
+                            "configured": settings.agent_model,
+                            "available": model_available,
+                            "total_in_ollama": len(available_models),
+                            "currently_loaded": loaded_models if loaded_models else ["none"]
+                        }
+
+                        if not model_available:
+                            ollama_error = f"Model '{settings.agent_model}' not found in Ollama. Available: {', '.join(available_models[:3])}"
+                            ollama_healthy = False
+                    except Exception as e:
+                        ollama_error = f"Could not list Ollama models: {str(e)}"
+                        ollama_healthy = False
+
+            except Exception as e:
+                ollama_error = str(e)
+                logger.warning(f"Ollama health check failed: {ollama_error}")
+
+            # Check 2: Database connection
+            database = get_database()
+            db_healthy = False
+            db_error = None
+
+            try:
+                db_healthy = await database.health_check()
+            except Exception as e:
+                db_error = str(e)
+                logger.warning(f"Database health check failed: {db_error}")
+
+            is_healthy = ollama_healthy and db_healthy
+
+            elapsed_ms = int((time.time() - start_time) * 1000)
+            status_code = 200 if is_healthy else 503
+            response.status_code = status_code
+
+            return {
+                "status": "healthy" if is_healthy else "unhealthy",
+                "status_code": status_code,
+                "response_time_ms": elapsed_ms,
+                "components": {
+                    "ollama": {
+                        "status": "healthy" if ollama_healthy else "unhealthy",
+                        "models": models_info if models_info else {
+                            "configured": settings.agent_model,
+                            "available": False
+                        },
+                        "error": ollama_error
+                    },
+                    "database": {
+                        "status": "healthy" if db_healthy else "unhealthy",
+                        "error": db_error
+                    }
+                }
+            }
+
+        @router.get(
+            "/health/diagnostics",
+            summary="Detailed system diagnostics",
+        )
+        async def diagnostics(deep_test: bool = False):
+            """
+            Comprehensive system diagnostics with detailed component information.
+
+            Query Parameters:
+            - deep_test: Set to true to actually test agent generation (slow, ~5-10s)
+
+            Returns detailed information about all system components.
+            """
+            import time
+            from src.models.ollama_client import get_ollama_client
+
+            start_time = time.time()
+            diagnostics = {
+                "timestamp": time.time(),
+                "service": {
+                    "name": settings.app_name,
+                    "version": settings.app_version,
+                    "purpose": "Infrastructure management and tools API"
+                },
+                "components": {}
+            }
+
+            # 1. Ollama Connection
+            ollama_client = get_ollama_client()
+            try:
+                ollama_healthy = await ollama_client.health_check()
+                diagnostics["components"]["ollama"] = {
+                    "status": "connected",
+                    "url": settings.ollama_base_url,
+                    "timeout": settings.ollama_timeout,
+                    "default_model": settings.default_model
+                }
+            except Exception as e:
+                diagnostics["components"]["ollama"] = {
+                    "status": "error",
+                    "error": str(e)
+                }
+
+            # 2. Configuration
+            diagnostics["configuration"] = {
+                "agent_fallback_enabled": settings.agent_fallback_enabled,
+                "memory_tier1_max_turns": settings.memory_tier1_max_turns,
+                "cors_origins": settings.cors_origins[:2] if len(settings.cors_origins) > 2 else settings.cors_origins
+            }
+
+            elapsed_ms = int((time.time() - start_time) * 1000)
+            diagnostics["response_time_ms"] = elapsed_ms
+
+            return diagnostics
+
+        return router
+
+
+# Create controller instance
+health_controller = HealthController()