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/utils/api.js

@@ -46,7 +46,7 @@ export const api = {
   // Protected endpoints
   // config endpoint removed - no longer needed (frontend uses window.location)
   projects: () => authenticatedFetch('/api/projects'),
-  sessions: (projectName, limit = 5, offset = 0) => 
+  sessions: (projectName, limit = 5, offset = 0) =>
     authenticatedFetch(`/api/projects/${projectName}/sessions?limit=${limit}&offset=${offset}`),
   sessionMessages: (projectName, sessionId, limit = null, offset = 0, provider = 'claude') => {
     const params = new URLSearchParams();
@@ -56,12 +56,13 @@ export const api = {
     }
     const queryString = params.toString();
 
-    // Route to the correct endpoint based on provider
     let url;
     if (provider === 'codex') {
       url = `/api/codex/sessions/${sessionId}/messages${queryString ? `?${queryString}` : ''}`;
     } else if (provider === 'cursor') {
       url = `/api/cursor/sessions/${sessionId}/messages${queryString ? `?${queryString}` : ''}`;
+    } else if (provider === 'gemini') {
+      url = `/api/gemini/sessions/${sessionId}/messages${queryString ? `?${queryString}` : ''}`;
     } else {
       url = `/api/projects/${projectName}/sessions/${sessionId}/messages${queryString ? `?${queryString}` : ''}`;
     }
@@ -80,6 +81,10 @@ export const api = {
     authenticatedFetch(`/api/codex/sessions/${sessionId}`, {
       method: 'DELETE',
     }),
+  deleteGeminiSession: (sessionId) =>
+    authenticatedFetch(`/api/gemini/sessions/${sessionId}`, {
+      method: 'DELETE',
+    }),
   deleteProject: (projectName, force = false) =>
     authenticatedFetch(`/api/projects/${projectName}${force ? '?force=true' : ''}`, {
       method: 'DELETE',
@@ -113,18 +118,18 @@ export const api = {
   // TaskMaster endpoints
   taskmaster: {
     // Initialize TaskMaster in a project
-    init: (projectName) => 
+    init: (projectName) =>
       authenticatedFetch(`/api/taskmaster/init/${projectName}`, {
         method: 'POST',
       }),
-    
+
     // Add a new task
     addTask: (projectName, { prompt, title, description, priority, dependencies }) =>
       authenticatedFetch(`/api/taskmaster/add-task/${projectName}`, {
         method: 'POST',
         body: JSON.stringify({ prompt, title, description, priority, dependencies }),
       }),
-    
+
     // Parse PRD to generate tasks
     parsePRD: (projectName, { fileName, numTasks, append }) =>
       authenticatedFetch(`/api/taskmaster/parse-prd/${projectName}`, {
@@ -150,7 +155,7 @@ export const api = {
         body: JSON.stringify(updates),
       }),
   },
-  
+
   // Browse filesystem for project suggestions
   browseFilesystem: (dirPath = null) => {
     const params = new URLSearchParams();