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/static/js/app.js

@@ -492,7 +492,7 @@ class AniWorldApp {
         try {
             this.showLoading();
 
-            const response = await fetch('/api/series');
+            const response = await fetch('/api/v1/anime');
 
             if (response.status === 401) {
                 window.location.href = '/login';
@@ -720,7 +720,7 @@ class AniWorldApp {
         try {
             this.showLoading();
 
-            const response = await this.makeAuthenticatedRequest('/api/search', {
+            const response = await this.makeAuthenticatedRequest('/api/v1/anime/search', {
                 method: 'POST',
                 headers: {
                     'Content-Type': 'application/json',
@@ -831,7 +831,7 @@ class AniWorldApp {
 
     async rescanSeries() {
         try {
-            const response = await this.makeAuthenticatedRequest('/api/rescan', {
+            const response = await this.makeAuthenticatedRequest('/api/v1/anime/rescan', {
                 method: 'POST'
             });