auto-claude: subtask-1-1 - Add useEffect hook to reset expandedTerminalId when projectPath changes (#1240)

Fix terminal expansion state persisting across project switches. When user
expands a terminal in Project A and then navigates to Project B, the
expandedTerminalId would reference a non-existent terminal causing blank display.

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

apps/frontend/src/renderer/components/TerminalGrid.tsx

@@ -78,6 +78,11 @@ export function TerminalGrid({ projectPath, onNewTaskClick, isActive = false }:
   // Expanded terminal state - when set, this terminal takes up the full grid space
   const [expandedTerminalId, setExpandedTerminalId] = useState<string | null>(null);
 
+  // Reset expanded terminal when project changes
+  useEffect(() => {
+    setExpandedTerminalId(null);
+  }, [projectPath]);
+
   // Fetch available session dates when project changes
   useEffect(() => {
     if (!projectPath) {