Add CI/CD pipelines, NSIS installer, ES module bundling, and ruff linting

- Add Gitea Actions workflows: test.yml (lint + test on push/PR) and
  release.yml (build + NSIS installer + upload on v* tags)
- Add NSIS installer with optional desktop shortcut and auto-start
- Add esbuild bundler: ES module migration with IIFE bundle output
- Add build-dist-windows.sh for cross-building Windows distribution
- Fix all ruff lint errors (import sorting, unused imports, line length)
- Remove redundant scripts (start-server.bat, stop-server.bat,
  start-server-background.vbs)
- Update CLAUDE.md with CI/CD and release documentation

media_server/routes/browser.py

@@ -4,20 +4,19 @@ import asyncio
 import logging
 import tempfile
 from pathlib import Path
-from typing import Optional
 from urllib.parse import unquote
 
 from fastapi import APIRouter, Depends, HTTPException, Query, Response
-from fastapi.responses import FileResponse, StreamingResponse
+from fastapi.responses import FileResponse
 from pydantic import BaseModel, Field
 
 from ..auth import verify_token, verify_token_or_query
 from ..config import MediaFolderConfig, settings
 from ..config_manager import config_manager
+from ..services import get_media_controller
 from ..services.browser_service import BrowserService
 from ..services.metadata_service import MetadataService
 from ..services.thumbnail_service import ThumbnailService
-from ..services import get_media_controller
 from ..services.websocket_manager import ws_manager
 
 logger = logging.getLogger(__name__)
@@ -281,7 +280,7 @@ async def browse(
         logger.warning(f"Folder temporarily unavailable: {e}")
         raise HTTPException(
             status_code=503,
-            detail=f"Folder is temporarily unavailable. It may be a network share that is not accessible at the moment."
+            detail="Folder is temporarily unavailable. It may be a network share that is not accessible at the moment."
         )
     except Exception as e:
         logger.error(f"Error browsing directory (type: {type(e).__name__}): {e}")