test(llm): 補 OpenCode 逾時設定與失敗丟例外（不再 process.exit）的測試

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

app/test/llm.test.js

@@ -85,14 +85,34 @@ describe('chat - OpenCode', async () => {
     assert.equal(result, 'hello world');
   });
 
-  it('calls process.exit(1) when OpenCode fails', async () => {
+  it('sets a request timeout on OpenCode calls so a stalled server fails fast', async () => {
+    process.env.OPENCODE_BASE_URL = 'http://opencode.local:4096';
+    const timeouts = [];
+    mock.method(axios, 'post', async (url, _payload, opts) => {
+      timeouts.push(opts.timeout);
+      if (url.endsWith('/session')) return { data: { id: 'ses_test' } };
+      return { data: { parts: [{ type: 'text', text: 'ok' }] } };
+    });
+
+    await chat('sys', 'user');
+
+    assert.equal(timeouts.length, 2);
+    for (const t of timeouts) {
+      assert.equal(typeof t, 'number');
+      assert.ok(t > 0, 'OpenCode 請求必須帶正數 timeout，避免無限等待');
+    }
+  });
+
+  it('throws (does not process.exit) when OpenCode fails, so callers can degrade gracefully', async () => {
     process.env.OPENCODE_BASE_URL = 'http://opencode.local:4096';
     mock.method(axios, 'post', async () => { throw new Error('fail'); });
     const exitMock = mock.method(process, 'exit', () => { throw new Error('exit:1'); });
 
-    await assert.rejects(() => chat('sys', 'user'), /exit:1/);
+    // 失敗時向外拋出原始錯誤，而非 process.exit(1)，讓 Step5 的 Promise.allSettled
+    // 與去重／過濾的 try/catch fallback 能各自處理，不會整個流程被砍掉。
+    await assert.rejects(() => chat('sys', 'user'), /fail/);
 
-    assert.equal(exitMock.mock.calls[0].arguments[0], 1);
+    assert.equal(exitMock.mock.calls.length, 0, 'chat 不應再呼叫 process.exit');
   });
 });