feat: Google's gemini-cli integration (#422)

* feat: integrate Gemini AI agent provider

- Core Backend: Ported gemini-cli.js and gemini-response-handler.js to establish the CLI bridge. Registered 'gemini' as an active provider within index.js.
- Core Frontend: Extended QuickSettingsPanel.jsx, Settings.jsx, and AgentListItem.jsx to render the Gemini provider option, models (gemini-pro, gemini-flash, etc.), and handle OAuth states.
- WebSocket Pipeline: Added support for gemini-command executions in backend and payload processing of gemini-response and gemini-error streams in useChatRealtimeHandlers.ts. Resolved JSON double-stringification and sessionId stripping issues in the transmission handler.
- Platform Compatibility: Added scripts/fix-node-pty.js postinstall script and modified posix_spawnp calls with sh -c wrapper to prevent ENOEXEC and MacOS permission errors when spawning the gemini headless binary.
- UX & Design: Imported official Google Gemini branding via GeminiLogo.jsx and gemini-ai-icon.svg. Updated translations (chat.json) for en, zh-CN, and ko locales.

* fix: propagate gemini permission mode from settings to cli

- Added Gemini Permissions UI in Settings to toggle Auto Edit and YOLO modes
- Synced gemini permission mode to localStorage
- Passed permissionMode in useChatComposerState for Gemini commands
- Mapped frontend permission modes to --yolo and --approval-mode options in gemini-cli.js

* feat(gemini): Refactor Gemini CLI integration to use stream-json

- Replaced regex buffering text-system with NDJSON stream parsing
- Added fallback for restricted models like gemini-3.1-pro-preview

* feat(gemini): Render tool_use and tool_result UI bubbles

- Forwarded gemini tool NDJSON objects to the websocket
- Added React state handlers in useChatRealtimeHandlers to match Claude's tool UI behavior

* feat(gemini): Add native session resumption and UI token tracking

- Captured cliSessionId from init events to map ClaudeCodeUI's chat sessionId directly into Gemini's internal session manager.
- Updated gemini-cli.js spawn arguments to append the --resume proxy flag instead of naively dumping the accumulated chat history into the command prompt.
- Handled result stream objects by proxying total_tokens back into the frontend's claude-status tracker to natively populate the UI label.
- Eliminated gemini-3 model proxy filter entirely.

* fix(gemini): Fix static 'Claude' name rendering in chat UI header

- Added "gemini": "Gemini" translation strings to messageTypes across English, Korean, and Chinese loc dictionaries.
- Updated AssistantThinkingIndicator and MessageComponent ternary checks to identify provider === 'gemini' and render the appropriate brand label instead of statically defaulting to Claude.

* feat: Add Gemini session persistence API mapping and Sidebar UI

* fix(gemini): Watch ~/.gemini/sessions for live UI updates

Added the .gemini/sessions directory to PROVIDER_WATCH_PATHS so that Chokidar emits projects_updated websocket events when new Gemini sessions are created or modified, fixing live sidebar updates.

* fix(gemini): Fix Gemini authentication status display in Settings UI

- Injected 'checkGeminiAuthStatus' into the Settings.jsx React effect hook so that the UI can poll and render the 'geminiAuthStatus' state.
- Updated 'checkGeminiCredentials()' inside server/routes/cli-auth.js to read from '~/.gemini/oauth_creds.json' and '~/.gemini/google_accounts.json', resolving the email address correctly.

* Use logo-only icon for gemini

* feat(gemini): Add Gemini 3 preview models to UI selection list

* Fix Gemini CLI session resume bug and PR #422 review nitpicks

* Fix Gemini tool calls disappearing from UI after completion

* fix(gemini): resolve outstanding PR #422 feedback and stabilize gemini CLI timeouts

* fix(gemini): resolve resume flag and shell session initialization issues

This commit addresses the remaining PR comments for the Gemini CLI integration:

- Moves the `--resume` flag logic outside the prompt command block, ensuring Gemini sessions correctly resume even when a new prompt isn't passed.

- Updates `handleShellConnection` to correctly lookup the native `cliSessionId` from the internal `sessionId` when spawning Gemini sessions in a plain shell.

- Refactors dynamic import of `sessionManager.js` back to a native static import for code consistency.

* chore: fix TypeScript errors and remove gemini CLI dependency

* fix: use cross-spawn on Windows to resolve gemini.cmd correctly

---------

Co-authored-by: Haileyesus <118998054+blackmammoth@users.noreply.github.com>

src/components/sidebar/hooks/useSidebarController.ts

@@ -277,10 +277,14 @@ export function useSidebarController({
     setSessionDeleteConfirmation(null);
 
     try {
-      const response =
-        provider === 'codex'
-          ? await api.deleteCodexSession(sessionId)
-          : await api.deleteSession(projectName, sessionId);
+      let response;
+      if (provider === 'codex') {
+        response = await api.deleteCodexSession(sessionId);
+      } else if (provider === 'gemini') {
+        response = await api.deleteGeminiSession(sessionId);
+      } else {
+        response = await api.deleteSession(projectName, sessionId);
+      }
 
       if (response.ok) {
         onSessionDelete?.(sessionId);

src/components/sidebar/types/types.ts

@@ -44,6 +44,7 @@ export type SidebarProps = {
 export type SessionViewModel = {
   isCursorSession: boolean;
   isCodexSession: boolean;
+  isGeminiSession: boolean;
   isActive: boolean;
   sessionName: string;
   sessionTime: string;

src/components/sidebar/utils/utils.ts

@@ -48,7 +48,7 @@ export const getSessionDate = (session: SessionWithProvider): Date => {
     return new Date(session.createdAt || session.lastActivity || 0);
   }
 
-  return new Date(session.lastActivity || 0);
+  return new Date(session.lastActivity || session.createdAt || 0);
 };
 
 export const getSessionName = (session: SessionWithProvider, t: TFunction): string => {
@@ -60,6 +60,10 @@ export const getSessionName = (session: SessionWithProvider, t: TFunction): stri
     return session.summary || session.name || t('projects.codexSession');
   }
 
+  if (session.__provider === 'gemini') {
+    return session.summary || session.name || t('projects.newSession');
+  }
+
   return session.summary || t('projects.newSession');
 };
 
@@ -72,7 +76,7 @@ export const getSessionTime = (session: SessionWithProvider): string => {
     return String(session.createdAt || session.lastActivity || '');
   }
 
-  return String(session.lastActivity || '');
+  return String(session.lastActivity || session.createdAt || '');
 };
 
 export const createSessionViewModel = (
@@ -86,6 +90,7 @@ export const createSessionViewModel = (
   return {
     isCursorSession: session.__provider === 'cursor',
     isCodexSession: session.__provider === 'codex',
+    isGeminiSession: session.__provider === 'gemini',
     isActive: diffInMinutes < 10,
     sessionName: getSessionName(session, t),
     sessionTime: getSessionTime(session),
@@ -112,7 +117,12 @@ export const getAllSessions = (
     __provider: 'codex' as const,
   }));
 
-  return [...claudeSessions, ...cursorSessions, ...codexSessions].sort(
+  const geminiSessions = (project.geminiSessions || []).map((session) => ({
+    ...session,
+    __provider: 'gemini' as const,
+  }));
+
+  return [...claudeSessions, ...cursorSessions, ...codexSessions, ...geminiSessions].sort(
     (a, b) => getSessionDate(b).getTime() - getSessionDate(a).getTime(),
   );
 };
@@ -205,8 +215,8 @@ export const normalizeProjectForSettings = (project: Project): SettingsProject =
     typeof project.fullPath === 'string' && project.fullPath.length > 0
       ? project.fullPath
       : typeof project.path === 'string'
-      ? project.path
-      : '';
+        ? project.path
+        : '';
 
   return {
     name: project.name,