Update HTML templates and JavaScript for FastAPI compatibility

- Replace Flask url_for() with direct /static/ paths in all HTML templates
- Update CSS and JavaScript file references to use FastAPI static mount
- Convert Flask-specific template patterns to FastAPI-compatible syntax
- Update JavaScript API endpoints to match new FastAPI route structure:
  * /api/series -> /api/v1/anime
  * /api/search -> /api/v1/anime/search
  * /api/rescan -> /api/v1/anime/rescan
- Add web interface routes for serving HTML templates
- Add template response endpoints for /app, /login, /setup, /queue
- Mark HTML template and JavaScript migration tasks as completed
- Maintain Jinja2 template compatibility with FastAPI

src/server/web/templates/base/login.html

@@ -4,7 +4,7 @@
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>AniWorld Manager - Login</title>
-    <link rel="stylesheet" href="{{ url_for('static', filename='css/styles.css') }}">
+    <link rel="stylesheet" href="/static/css/styles.css">
     <link href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0/css/all.min.css" rel="stylesheet">
     <style>
         .login-container {