chat: run the /email chat from the email account's storage dir

The email chat's working directory now resolves to
DATA_PATH/<owner>/email_accounts/<accountEmail> (created if missing), so the agent
operates in the selected account's dir (emails.db, attachment_cache, …).

- websocket.ts: new resolveChatCwd — context 'email' → the account dir (via a new
  resolveEmailCwd), 'chat' → the pwd/claude_sessions dir, else the given cwd. Both the
  Claude and OpenCode handlers use it. The account defaults to the owner's first enabled
  account for now; the account selector will pass it as contextId later.
- OpenCode honors the cwd again: send-opencode passes it as the session `directory`
  (client.createSession(directory?)) for context-scoped chats; the general /chat still
  omits it and uses the fixed server's default project. Verified against the live server
  that directory-bound sessions create + list.

No frontend change — the /email panel already sends context:'email'.

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

src/servers/api/chat/opencode/client.ts

@@ -105,9 +105,13 @@ class ServerConnection {
     return (await res.json()) as T;
   }
 
-  async createSession(title?: string): Promise<string> {
-    // No `directory` — the session lives in the fixed server's own project (its cwd).
-    const session = await this.postJson<{ id?: string }>('/session', title ? { title } : {});
+  async createSession(directory?: string, title?: string): Promise<string> {
+    // `directory` binds the session's working dir (e.g. an email account dir). Omit it for the general
+    // /chat, so the session lives in the fixed server's own project (its cwd).
+    const body: Record<string, unknown> = {};
+    if (directory) body.directory = directory;
+    if (title) body.title = title;
+    const session = await this.postJson<{ id?: string }>('/session', body);
     if (!session.id) throw new Error('opencode POST /session returned no id');
     return session.id;
   }

src/servers/api/chat/websocket.ts

@@ -7,8 +7,9 @@ import { sendOpenCodeStreaming } from '@@/channels/send-opencode';
 import { ensureClaudeSessionsCwd } from './claude-sessions';
 import * as sidecar from '@@/sidecar-registry';
 import { join } from 'path';
-import { getHomeDirForRole } from '../../../servers/data-path';
-import { getUserSettings } from 'officerdb';
+import { getHomeDirForRole, getEmailAccountsDir } from '../../../servers/data-path';
+import { getUserSettings, getEmailAccounts } from 'officerdb';
+import { mkdirSync } from 'node:fs';
 import { logger } from './logger';
 
 // Default model when no user preference is set
@@ -56,6 +57,38 @@ export const resolveBaseCwd = (email: string, role: string, cwd?: string) => {
   return resolveCwd(email, role, cwd);
 };
 
+// The email chat runs from the selected account's storage dir:
+//   DATA_PATH/<owner>/email_accounts/<accountEmail>
+// `accountEmail` will come from the account selector (msg.contextId) later; for now default to the
+// owner's first enabled account. Falls back to the email_accounts root if there are no accounts.
+async function resolveEmailCwd(userId: number, ownerEmail: string, accountEmail?: string): Promise<string> {
+  let account = accountEmail?.trim();
+  if (!account) {
+    try {
+      const accounts = await getEmailAccounts(userId);
+      account = (accounts.find((a) => a.enabled) ?? accounts[0])?.email;
+    } catch (err) {
+      logger.error('Failed to resolve email account for chat cwd', { userId, error: String(err) });
+    }
+  }
+  const dir = account ? join(getEmailAccountsDir(ownerEmail), account) : getEmailAccountsDir(ownerEmail);
+  mkdirSync(dir, { recursive: true });
+  return dir;
+}
+
+// The working directory a chat turn runs in, by context: email → the account dir; /chat → a chosen
+// pwd or the default claude_sessions dir; everything else (browser/project/dashboard) → the given cwd.
+async function resolveChatCwd(
+  msg: { context?: string; contextId?: string; cwd?: string },
+  email: string,
+  role: string,
+  userId: number,
+): Promise<string> {
+  if (msg.context === 'email') return resolveEmailCwd(userId, email, msg.contextId);
+  if (msg.context === 'chat') return msg.cwd?.trim() ? resolveCwd(email, role, msg.cwd) : ensureClaudeSessionsCwd(email);
+  return resolveCwd(email, role, msg.cwd);
+}
+
 const wsToSessionMap = new WeakMap<any, string>();
 
 // Per-connection heartbeat. Bun closes a WS idle for `idleTimeout` (60s), and its timer only resets
@@ -309,15 +342,7 @@ async function handleClaudeCodeChat(
 ): Promise<void> {
   const { email, username, userId } = ws.data;
 
-  // The standalone /chat route runs from a chosen working directory (the pwd selector) or, by default,
-  // a dedicated `claude_sessions` dir — so transcripts form their own Claude "project" group per cwd.
-  // Other contexts (email/project panels) keep their own cwd.
-  const cwd =
-    msg.context === 'chat'
-      ? msg.cwd?.trim()
-        ? resolveCwd(email, ws.data.role, msg.cwd)
-        : ensureClaudeSessionsCwd(email)
-      : resolveCwd(email, ws.data.role, msg.cwd);
+  const cwd = await resolveChatCwd(msg, email, ws.data.role, userId);
 
   const groupSlug = msg.groupSlug || null;
 
@@ -397,13 +422,11 @@ async function handleOpenCodeChat(
 ): Promise<void> {
   const { email, username, userId } = ws.data;
 
-  // Same cwd resolution as the Claude path: /chat runs from a chosen pwd or the default dir.
-  const cwd =
-    msg.context === 'chat'
-      ? msg.cwd?.trim()
-        ? resolveCwd(email, ws.data.role, msg.cwd)
-        : ensureClaudeSessionsCwd(email)
-      : resolveCwd(email, ws.data.role, msg.cwd);
+  const cwd = await resolveChatCwd(msg, email, ws.data.role, userId);
+
+  // OpenCode's working directory: a context-scoped dir (email account, project, …) for OpenCode to
+  // operate in; the general /chat runs in the fixed server's default project (home), so pass none.
+  const openCodeDir = msg.context && msg.context !== 'chat' ? cwd : undefined;
 
   const groupSlug = msg.groupSlug || null;
 
@@ -446,7 +469,7 @@ async function handleOpenCodeChat(
       username,
       prompt: effectivePrompt,
       sessionKey: sessionId,
-      cwd,
+      cwd: openCodeDir,
       model,
       role: ws.data.role,
       resumeSessionId: msg.resumeSessionId,