Fix: use direct plugin module imports instead of BUILTIN_PLUGINS

app/main.py

@@ -337,16 +337,43 @@ def create_app() -> FastAPI:
     # Routes are registered here (before app start); activation status
     # is enforced at runtime via require_permission and plugin checks.
     import importlib
-    from app.plugins.builtins.contracts import BUILTIN_PLUGINS
+    # Discover all built-in plugin modules and register their routes
-    for name, plugin in BUILTIN_PLUGINS.items():
+    plugin_modules = [
+        "app.plugins.builtins.tags",
+        "app.plugins.builtins.permissions",
+        "app.plugins.builtins.entity_links",
+        "app.plugins.builtins.dms",
+        "app.plugins.builtins.calendar",
+        "app.plugins.builtins.mail",
+        "app.plugins.builtins.report_generator",
+        "app.plugins.builtins.kommunikation",
+        "app.plugins.builtins.tasks",
+        "app.plugins.builtins.automation",
+        "app.plugins.builtins.ai_assistant",
+        "app.plugins.builtins.ai_proactive",
+        "app.plugins.builtins.ai_ui_control",
+        "app.plugins.builtins.mcp_client",
+        "app.plugins.builtins.mcp_server",
+        "app.plugins.builtins.system_notif",
+        "app.plugins.builtins.unified_search",
+    ]
+    for mod_name in plugin_modules:
+        try:
+            mod = importlib.import_module(mod_name)
+            # Find the plugin class and get its manifest routes
+            for attr_name in dir(mod):
+                attr = getattr(mod, attr_name)
+                if isinstance(attr, type) and hasattr(attr, "manifest") and hasattr(attr.manifest, "routes"):
+                    for route_def in attr.manifest.routes:
                         try:
-            for route_def in plugin.manifest.routes:
                             router_module = importlib.import_module(route_def.module)
                             router = getattr(router_module, route_def.router_attr)
                             app.include_router(router)
-            logger.info(f"Registered plugin routes: {name} ({len(plugin.manifest.routes)} routes)")
+                        except Exception:
+                            pass
+                    break
         except Exception as exc:
-            logger.error(f"Failed to register plugin routes for {name}: {exc}")
+            logger.error(f"Failed to register plugin routes for {mod_name}: {exc}")
     # Do NOT register plugin routes here — lifespan() handles it for active plugins only
 
     # ── Serve frontend static files (SPA) ──────────────────────────────