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>

test_final.js

@@ -0,0 +1,12 @@
+const { injectCacheBusting } = require('./cache-bust-middleware');
+
+const testHTML = `
+<script src="/claude/claude-ide/ide.js"></script>
+<script src='/claude/claude-ide/ide.v3.js'></script>
+<script src="/claude/claude-ide/chat-functions.js"></script>
+<script src="https://unpkg.com/monaco-editor@0.45.0/min/vs/loader.js"></script>
+`;
+
+const result = injectCacheBusting(testHTML, "v=1769008542216");
+console.log('Transformed:');
+console.log(result);