feat(sessions): add resuming to geminiChat and add CLI flags for session management (#10719)

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

packages/cli/src/ui/AppContainer.tsx

@@ -42,6 +42,7 @@ import {
   getAllGeminiMdFilenames,
   AuthType,
   clearCachedCredentialFile,
+  type ResumedSessionData,
   recordExitFail,
   ShellExecutionService,
   saveApiKey,
@@ -105,6 +106,7 @@ import {
   useExtensionUpdates,
 } from './hooks/useExtensionUpdates.js';
 import { ShellFocusContext } from './contexts/ShellFocusContext.js';
+import { useSessionResume } from './hooks/useSessionResume.js';
 import { type ExtensionManager } from '../config/extension-manager.js';
 import { requestConsentInteractive } from '../config/extensions/consent.js';
 import { disableMouseEvents, enableMouseEvents } from './utils/mouse.js';
@@ -129,6 +131,7 @@ interface AppContainerProps {
   startupWarnings?: string[];
   version: string;
   initializationResult: InitializationResult;
+  resumedSessionData?: ResumedSessionData;
 }
 
 /**
@@ -144,7 +147,7 @@ const SHELL_WIDTH_FRACTION = 0.89;
 const SHELL_HEIGHT_PADDING = 10;
 
 export const AppContainer = (props: AppContainerProps) => {
-  const { settings, config, initializationResult } = props;
+  const { settings, config, initializationResult, resumedSessionData } = props;
   const historyManager = useHistory();
   useMemoryMonitor(historyManager);
   const [corgiMode, setCorgiMode] = useState(false);
@@ -395,6 +398,19 @@ export const AppContainer = (props: AppContainerProps) => {
   const isAuthDialogOpen = authState === AuthState.Updating;
   const isAuthenticating = authState === AuthState.Unauthenticated;
 
+  // Session browser and resume functionality
+  const isGeminiClientInitialized = config.getGeminiClient()?.isInitialized();
+
+  useSessionResume({
+    config,
+    historyManager,
+    refreshStatic,
+    isGeminiClientInitialized,
+    setQuittingMessages,
+    resumedSessionData,
+    isAuthenticating,
+  });
+
   // Create handleAuthSelect wrapper for backward compatibility
   const handleAuthSelect = useCallback(
     async (authType: AuthType | undefined, scope: LoadableSettingScope) => {