feat(vscode-ide-companion): refactor message components with modular architecture

Refactor UI message rendering by extracting message types into dedicated components. Add ChatHeader component for better session management interface.

- Extract message components: UserMessage, AssistantMessage, ThinkingMessage, StreamingMessage, WaitingMessage
- Add ChatHeader component with session selector and action buttons
- Delete MessageContent.css and consolidate styles into App.scss
- Update Tailwind config for component styling
- Improve message rendering with proper TypeScript typing

packages/vscode-ide-companion/src/auth/authStateManager.ts

@@ -29,9 +29,20 @@ export class AuthStateManager {
     const state = await this.getAuthState();
 
     if (!state) {
+      console.log('[AuthStateManager] No cached auth state found');
       return false;
     }
 
+    console.log('[AuthStateManager] Found cached auth state:', {
+      workingDir: state.workingDir,
+      authMethod: state.authMethod,
+      timestamp: new Date(state.timestamp).toISOString(),
+    });
+    console.log('[AuthStateManager] Checking against:', {
+      workingDir,
+      authMethod,
+    });
+
     // Check if auth is still valid (within cache duration)
     const now = Date.now();
     const isExpired =