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_fix.js

@@ -0,0 +1,14 @@
+// Test the correct regex replacement
+const html = `<script src="/claude/claude-ide/ide.js"></script>
+<script src='/claude/claude-ide/ide.v3.js'></script>`;
+
+const version = "v=1769008542216";
+
+// Correct way to replace while preserving the quote character
+const result = html.replace(/<script\s+src=(["'])(\/claude\/[^"']*\.(?:js|css))\1/g, (match, quote, src) => {
+  const separator = src.includes('?') ? '&' : '?';
+  const cacheBustedSrc = `${src}${separator}${version}`;
+  return `<script src=${quote}${cacheBustedSrc}${quote}>`;
+});
+
+console.log('Result:', result);