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/service/install_windows.py

@@ -13,15 +13,12 @@ Usage:
 
 import os
 import sys
-import socket
-import logging
 
 try:
-    import win32serviceutil
-    import win32service
-    import win32event
     import servicemanager
-    import win32api
+    import win32event
+    import win32service
+    import win32serviceutil
 
     WIN32_AVAILABLE = True
 except ImportError:
@@ -64,8 +61,9 @@ class MediaServerService:
     def main(self):
         """Main service loop."""
         import uvicorn
-        from media_server.main import app
+
         from media_server.config import settings
+        from media_server.main import app
 
         config = uvicorn.Config(
             app,
@@ -95,10 +93,9 @@ def install_service():
 
     try:
         # Get the path to the Python executable
-        python_exe = sys.executable
 
         # Get the path to this module
-        module_path = os.path.abspath(__file__)
+        os.path.abspath(__file__)
 
         win32serviceutil.InstallService(
             MediaServerService._svc_name_,