Fix linting issues: line length, import sorting, unused variables

- Set ruff/black line length to 120
- Reformatted code with black
- Fixed import ordering with ruff
- Disabled lint for UI component files with long CSS strings
- Updated pyproject.toml with proper tool configuration

app/main.py

@@ -14,8 +14,8 @@ from fastapi import FastAPI, Request, WebSocket, WebSocketDisconnect
 from fastapi.middleware.cors import CORSMiddleware
 from nicegui import ui
 
-from app.api.routes import router as api_router
 import app.pages  # noqa: F401
+from app.api.routes import router as api_router
 from app.services.cache import CacheService
 from app.services.data_service import DataService
 
@@ -36,7 +36,7 @@ class Settings:
     nicegui_storage_secret: str = "vault-dash-dev-secret"
 
     @classmethod
-    def load(cls) -> "Settings":
+    def load(cls) -> Settings:
         cls._load_dotenv()
         origins = os.getenv("CORS_ORIGINS", "*")
         return cls(
@@ -169,4 +169,9 @@ ui.run_with(
 if __name__ in {"__main__", "__mp_main__"}:
     import uvicorn
 
-    uvicorn.run("app.main:app", host="0.0.0.0", port=8000, reload=settings.environment == "development")
+    uvicorn.run(
+        "app.main:app",
+        host="0.0.0.0",
+        port=8000,
+        reload=settings.environment == "development",
+    )