Revert "chat: root the OpenCode server at the chat cwd (email chat now runs in the account dir)"

This reverts commit d60c73b3a3.

src/servers/channels/send-opencode.ts

@@ -4,7 +4,6 @@ import { ensureServer } from '@@/api/chat/opencode/server-manager';
 import { getConnection } from '@@/api/chat/opencode/client';
 import { createEventMapper } from '@@/api/chat/opencode/event-mapper';
 import { getOpenCodeSession, setOpenCodeSession } from '@@/api/chat/opencode/state';
-import { getHomeDirForRole } from '../data-path';
 
 // The OpenCode analog of send-claude-code.ts's streaming path. Drives a turn against a warm
 // `opencode serve` over HTTP + SSE, mapping events to the shared ChatEvent contract.
@@ -34,11 +33,9 @@ function splitModel(model: string): { providerID: string; modelID: string } {
 }
 
 export async function sendOpenCodeStreaming(params: OpenCodeStreamingParams): Promise<OpenCodeStreamingHandle> {
-  logger.info('OpenCode streaming exec', { sessionKey: params.sessionKey, model: params.model, cwd: params.cwd });
+  logger.info('OpenCode streaming exec', { sessionKey: params.sessionKey, model: params.model });
 
-  // params.cwd set (email/project) → a server rooted there; unset (/chat) → the fixed pm2 server.
-  const home = getHomeDirForRole(params.email, params.role ?? '');
-  const { baseUrl } = await ensureServer(params.cwd, home);
+  const { baseUrl } = await ensureServer();
   const conn = getConnection(baseUrl);
 
   // Resolve the OpenCode session: a known mapping, or — when resuming from history — the sessionKey is
@@ -48,8 +45,7 @@ export async function sendOpenCodeStreaming(params: OpenCodeStreamingParams): Pr
     (params.sessionKey.startsWith('ses_') ? params.sessionKey : undefined) ??
     params.resumeSessionId;
   if (!opencodeSessionId) {
-    // The working dir comes from the server (rooted at cwd above), not a per-session param.
-    opencodeSessionId = await conn.createSession();
+    opencodeSessionId = await conn.createSession(params.cwd);
   }
   setOpenCodeSession(params.sessionKey, opencodeSessionId);
   const sessionId = opencodeSessionId;