Fix project isolation: Make loadChatHistory respect active project sessions

- Modified loadChatHistory() to check for active project before fetching all sessions
- When active project exists, use project.sessions instead of fetching from API
- Added detailed console logging to debug session filtering
- This prevents ALL sessions from appearing in every project's sidebar

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

debug_middleware.js

@@ -0,0 +1,42 @@
+// Debug version of middleware
+const fs = require('fs');
+const path = require('path');
+
+function createCacheBustingMiddleware(version) {
+  return function cacheBustingMiddleware(req, res, next) {
+    console.log('[MIDDLEWARE] Request for:', req.path);
+    
+    const originalSendFile = res.sendFile.bind(res);
+
+    res.sendFile = function(filePath, options, callback) {
+      console.log('[MIDDLEWARE] sendFile called with:', filePath);
+      console.log('[MIDDLEWARE] File extension check:', path.extname(filePath));
+      
+      if (filePath && (filePath.endsWith('.html') || filePath.endsWith('.htm'))) {
+        console.log('[MIDDLEWARE] Processing HTML file');
+        try {
+          const data = fs.readFileSync(filePath, 'utf8');
+          console.log('[MIDDLEWARE] File read successfully, length:', data.length);
+          
+          // Simple test: add comment
+          const modifiedHtml = data.replace('</head>', '<!-- cache-busted -->\n</head>');
+          
+          res.setHeader('Content-Type', 'text/html; charset=utf-8');
+          res.send(modifiedHtml);
+          
+          if (callback) callback();
+        } catch (err) {
+          console.error('[MIDDLEWARE] Error:', err);
+          return originalSendFile(filePath, options, callback);
+        }
+      } else {
+        console.log('[MIDDLEWARE] Not an HTML file, using original');
+        return originalSendFile(filePath, options, callback);
+      }
+    };
+
+    next();
+  };
+}
+
+module.exports = { createCacheBustingMiddleware };