Add vue-router, login/setup flow and backend logging

Refactor frontend to route-based navigation with vue-router, add
system setup and login pages with API integration. Add structured
logging, access-log middleware and startup lifecycle to FastAPI
backend.

server/src/app/main.py

@@ -5,17 +5,32 @@ from fastapi.middleware.cors import CORSMiddleware
 
 from app.api.router import api_router
 from app.core.config import get_settings
+from app.core.logging import get_logger, setup_logging
+from app.middleware.logging import AccessLogMiddleware
 
 
 def create_app() -> FastAPI:
     settings = get_settings()
 
+    setup_logging(
+        level=settings.log_level,
+        log_dir=settings.log_dir,
+        enable_file=settings.log_file_enabled,
+    )
+
+    logger = get_logger("app.main")
+    logger.info(
+        "Starting %s (env=%s, debug=%s)", settings.app_name, settings.app_env, settings.app_debug
+    )
+
     app = FastAPI(
         title=settings.app_name,
         debug=settings.app_debug,
         version="0.1.0",
     )
 
+    app.add_middleware(AccessLogMiddleware)
+
     if settings.cors_origins:
         app.add_middleware(
             CORSMiddleware,
@@ -31,6 +46,15 @@ def create_app() -> FastAPI:
     def root() -> dict[str, str]:
         return {"message": f"{settings.app_name} is running"}
 
+    @app.on_event("startup")
+    def _on_startup() -> None:
+        logger.info(
+            "Server ready — host=%s port=%s prefix=%s",
+            settings.app_host,
+            settings.app_port,
+            settings.api_v1_prefix,
+        )
+
     return app