chat: pwd selector — switch the /chat working directory

The Sessions panel header gets a pwd selector: the default claude_sessions dir,
plus every directory that already has Claude sessions (auto-discovered by reading
the real cwd back from ~/.claude/projects), plus free-text entry. Switching pwd
refetches the list for that cwd's Claude project group and runs New Chat / resume
in it. Backend: GET /chat/pwds + a ?cwd= param on the session ops; the WS handler
honors a chosen cwd for /chat (default claude_sessions). Browse-modal picker next.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/servers/api/chat/chat.ts

@@ -1,38 +1,54 @@
+import type { Context } from 'hono';
 import { createRouter } from '../../create-router';
-import { getClaudeSessionsCwd, listClaudeSessions, loadClaudeSession, deleteClaudeSession, renameClaudeSession } from './claude-sessions';
+import {
+  getClaudeSessionsCwd,
+  listClaudePwds,
+  listClaudeSessions,
+  loadClaudeSession,
+  deleteClaudeSession,
+  renameClaudeSession,
+} from './claude-sessions';
 
 export const chatRouter = createRouter();
 
-// GET /chat/sessions — the /chat route's conversations, read straight from Claude's own transcript
-// store for the dedicated claude_sessions working directory (Claude is the source of truth).
-chatRouter.get('/sessions', (ctx) => {
+// The working directory a request operates on: an explicit ?cwd= (a chosen pwd), else the default
+// claude_sessions dir. Claude groups sessions by cwd, so this selects which project group we read.
+const cwdOf = (ctx: Context, email: string): string => ctx.req.query('cwd')?.trim() || getClaudeSessionsCwd(email);
+
+// GET /chat/pwds — the default /chat dir plus every directory that already has Claude sessions.
+chatRouter.get('/pwds', (ctx) => {
   const email = ctx.get('user').email;
-  const sessions = listClaudeSessions(email, getClaudeSessionsCwd(email));
-  return ctx.json({ sessions });
+  return ctx.json({ pwds: listClaudePwds(email), default: getClaudeSessionsCwd(email) });
 });
 
-// GET /chat/sessions/:id — one conversation's full transcript, parsed into display-ready messages.
+// GET /chat/sessions[?cwd=] — the conversations for a working directory, from Claude's transcripts.
+chatRouter.get('/sessions', (ctx) => {
+  const email = ctx.get('user').email;
+  return ctx.json({ sessions: listClaudeSessions(email, cwdOf(ctx, email)) });
+});
+
+// GET /chat/sessions/:id[?cwd=] — one conversation's full transcript, parsed into display messages.
 chatRouter.get('/sessions/:id', (ctx) => {
   const email = ctx.get('user').email;
-  const detail = loadClaudeSession(email, getClaudeSessionsCwd(email), ctx.req.param('id'));
+  const detail = loadClaudeSession(email, cwdOf(ctx, email), ctx.req.param('id'));
   if (!detail) return ctx.text('Not found', 404);
   return ctx.json(detail);
 });
 
-// DELETE /chat/sessions/:id — remove a conversation (deletes Claude's transcript file).
+// DELETE /chat/sessions/:id[?cwd=] — remove a conversation (deletes Claude's transcript file).
 chatRouter.delete('/sessions/:id', (ctx) => {
   const email = ctx.get('user').email;
-  const ok = deleteClaudeSession(email, getClaudeSessionsCwd(email), ctx.req.param('id'));
+  const ok = deleteClaudeSession(email, cwdOf(ctx, email), ctx.req.param('id'));
   if (!ok) return ctx.text('Not found', 404);
   return ctx.json({ ok: true });
 });
 
-// PATCH /chat/sessions/:id/title — rename by writing a summary entry into Claude's transcript.
+// PATCH /chat/sessions/:id/title[?cwd=] — rename by writing a summary entry into Claude's transcript.
 chatRouter.patch('/sessions/:id/title', async (ctx) => {
   const email = ctx.get('user').email;
   const { title } = await ctx.req.json<{ title?: string }>();
   if (!title?.trim()) return ctx.text('title is required', 400);
-  const ok = renameClaudeSession(email, getClaudeSessionsCwd(email), ctx.req.param('id'), title.trim());
+  const ok = renameClaudeSession(email, cwdOf(ctx, email), ctx.req.param('id'), title.trim());
   if (!ok) return ctx.text('Not found', 404);
   return ctx.json({ ok: true });
 });