refactor: migrate main.py to modular routers and add project roadmap

- Migrated monolithic main.py to feature-scoped routers in app/routers/
- Added GEMINI.md for project context and AI instructional guidelines
- Updated README.md with a comprehensive modernization plan (SQL migration, robust scraping DSL, frontend modernization)
- Improved authentication with cookie support and modular JS
- Updated test suite and documentation

static/js/watchlist.js

@@ -7,7 +7,7 @@
  * Get user's watchlist
  */
 async function getWatchlist(status = null) {
-    const token = localStorage.getItem('auth_token');
+    const token = getToken();
     if (!token) {
         throw new Error('Not authenticated');
     }
@@ -34,7 +34,7 @@ async function getWatchlist(status = null) {
  * Add anime to watchlist
  */
 async function addToWatchlist(animeData) {
-    const token = localStorage.getItem('auth_token');
+    const token = getToken();
     if (!token) {
         throw new Error('Not authenticated');
     }
@@ -60,7 +60,7 @@ async function addToWatchlist(animeData) {
  * Update watchlist item
  */
 async function updateWatchlistItem(itemId, updateData) {
-    const token = localStorage.getItem('auth_token');
+    const token = getToken();
     if (!token) {
         throw new Error('Not authenticated');
     }
@@ -85,7 +85,7 @@ async function updateWatchlistItem(itemId, updateData) {
  * Delete from watchlist
  */
 async function deleteFromWatchlist(itemId) {
-    const token = localStorage.getItem('auth_token');
+    const token = getToken();
     if (!token) {
         throw new Error('Not authenticated');
     }
@@ -122,7 +122,7 @@ async function resumeWatchlistItem(itemId) {
  * Check specific anime for new episodes
  */
 async function checkWatchlistItem(itemId) {
-    const token = localStorage.getItem('auth_token');
+    const token = getToken();
     if (!token) {
         throw new Error('Not authenticated');
     }
@@ -145,7 +145,7 @@ async function checkWatchlistItem(itemId) {
  * Check all watchlist items
  */
 async function checkAllWatchlistItems() {
-    const token = localStorage.getItem('auth_token');
+    const token = getToken();
     if (!token) {
         throw new Error('Not authenticated');
     }
@@ -168,7 +168,7 @@ async function checkAllWatchlistItems() {
  * Get watchlist settings
  */
 async function getWatchlistSettings() {
-    const token = localStorage.getItem('auth_token');
+    const token = getToken();
     if (!token) {
         throw new Error('Not authenticated');
     }
@@ -190,7 +190,7 @@ async function getWatchlistSettings() {
  * Update watchlist settings
  */
 async function updateWatchlistSettings(settings) {
-    const token = localStorage.getItem('auth_token');
+    const token = getToken();
     if (!token) {
         throw new Error('Not authenticated');
     }
@@ -215,7 +215,7 @@ async function updateWatchlistSettings(settings) {
  * Get watchlist statistics
  */
 async function getWatchlistStats() {
-    const token = localStorage.getItem('auth_token');
+    const token = getToken();
     if (!token) {
         throw new Error('Not authenticated');
     }
@@ -237,7 +237,7 @@ async function getWatchlistStats() {
  * Get scheduler status
  */
 async function getSchedulerStatus() {
-    const token = localStorage.getItem('auth_token');
+    const token = getToken();
     if (!token) {
         throw new Error('Not authenticated');
     }
@@ -259,7 +259,7 @@ async function getSchedulerStatus() {
  * Start scheduler
  */
 async function startScheduler() {
-    const token = localStorage.getItem('auth_token');
+    const token = getToken();
     if (!token) {
         throw new Error('Not authenticated');
     }
@@ -282,7 +282,7 @@ async function startScheduler() {
  * Stop scheduler
  */
 async function stopScheduler() {
-    const token = localStorage.getItem('auth_token');
+    const token = getToken();
     if (!token) {
         throw new Error('Not authenticated');
     }