feat: add full-text search across conversations (#482)

* feat: add full-text search across conversations in sidebar

Add a search mode toggle (Projects/Conversations) to the sidebar search bar.
In Conversations mode, search text content across all JSONL session files
with debounced API calls, highlighted snippets, and click-to-navigate results.

* fix: address PR review feedback - session summary tracking, search sequence invalidation, fallback navigation, SSE streaming

- Track session summaries per-session in a Map instead of file-scoped variable
- Increment searchSeqRef when clearing conversation search to invalidate in-flight requests
- Add fallback session navigation when session not loaded in sidebar paging
- Stream search results via SSE for progressive display with progress indicator

* feat(search): add Codex/Gemini search and scroll-to-message navigation

- Search now includes Codex sessions (JSONL from ~/.codex/sessions/) and
  Gemini sessions (in-memory via sessionManager) in addition to Claude
- Search results include provider info and display a provider badge
- Click handler resolves the correct provider instead of hardcoding claude
- Clicking a search result loads all messages and scrolls to the matched
  message with a highlight flash animation

* fix(search): Codex search path matching and scroll reliability

- Fix Codex search scanning all sessions for every project by checking
  session_meta cwd match BEFORE scanning messages (was inflating match
  count and hitting limit before reaching later projects)
- Fix Codex search missing user messages in response_item entries
  (role=user with input_text content parts)
- Fix scroll-to-message being overridden by initial scrollToBottom
  using searchScrollActiveRef to inhibit competing scroll effects
- Fix snippet matching using contiguous substring instead of
  filtered words (which created non-existent phrases)

* feat(search): add Gemini CLI session support for search and history viewing

Gemini CLI sessions stored in ~/.gemini/tmp/<project>/chats/*.json are now
indexed for conversation search and can be loaded for viewing. Previously
only sessions created through the UI (sessionManager) were searchable.

* fix(search): full-word matching and longer highlight flash

- Search now uses word boundaries (\b) instead of substring matching,
  so "hi" no longer matches "this"
- Highlight flash extended to 4s with thicker outline and subtle
  background tint for better visibility

server/index.js

@@ -44,7 +44,7 @@ import pty from 'node-pty';
 import fetch from 'node-fetch';
 import mime from 'mime-types';
 
-import { getProjects, getSessions, getSessionMessages, renameProject, deleteSession, deleteProject, addProjectManually, extractProjectDirectory, clearProjectDirectoryCache } from './projects.js';
+import { getProjects, getSessions, getSessionMessages, renameProject, deleteSession, deleteProject, addProjectManually, extractProjectDirectory, clearProjectDirectoryCache, searchConversations } from './projects.js';
 import { queryClaudeSDK, abortClaudeSDKSession, isClaudeSDKSessionActive, getActiveClaudeSDKSessions, resolveToolApproval, getPendingApprovalsForSession, reconnectSessionWriter } from './claude-sdk.js';
 import { spawnCursor, abortCursorSession, isCursorSessionActive, getActiveCursorSessions } from './cursor-cli.js';
 import { queryCodex, abortCodexSession, isCodexSessionActive, getActiveCodexSessions } from './openai-codex.js';
@@ -608,6 +608,51 @@ app.post('/api/projects/create', authenticateToken, async (req, res) => {
     }
 });
 
+// Search conversations content (SSE streaming)
+app.get('/api/search/conversations', authenticateToken, async (req, res) => {
+    const query = typeof req.query.q === 'string' ? req.query.q.trim() : '';
+    const parsedLimit = Number.parseInt(String(req.query.limit), 10);
+    const limit = Number.isNaN(parsedLimit) ? 50 : Math.max(1, Math.min(parsedLimit, 100));
+
+    if (query.length < 2) {
+        return res.status(400).json({ error: 'Query must be at least 2 characters' });
+    }
+
+    res.writeHead(200, {
+        'Content-Type': 'text/event-stream',
+        'Cache-Control': 'no-cache',
+        'Connection': 'keep-alive',
+        'X-Accel-Buffering': 'no',
+    });
+
+    let closed = false;
+    const abortController = new AbortController();
+    req.on('close', () => { closed = true; abortController.abort(); });
+
+    try {
+        await searchConversations(query, limit, ({ projectResult, totalMatches, scannedProjects, totalProjects }) => {
+            if (closed) return;
+            if (projectResult) {
+                res.write(`event: result\ndata: ${JSON.stringify({ projectResult, totalMatches, scannedProjects, totalProjects })}\n\n`);
+            } else {
+                res.write(`event: progress\ndata: ${JSON.stringify({ totalMatches, scannedProjects, totalProjects })}\n\n`);
+            }
+        }, abortController.signal);
+        if (!closed) {
+            res.write(`event: done\ndata: {}\n\n`);
+        }
+    } catch (error) {
+        console.error('Error searching conversations:', error);
+        if (!closed) {
+            res.write(`event: error\ndata: ${JSON.stringify({ error: 'Search failed' })}\n\n`);
+        }
+    } finally {
+        if (!closed) {
+            res.end();
+        }
+    }
+});
+
 const expandWorkspacePath = (inputPath) => {
     if (!inputPath) return inputPath;
     if (inputPath === '~') {