[Bugs] **Short (in-app "Report a problem"):**

**Mood:** 😊
**Category:** Bugs

**Short (in-app "Report a problem"):**

**OAuth MCP servers broke after a recent app update.** All MCP servers configured with OAuth stopped authenticating — the "Sign in" button no longer appears in MCP settings, so the OAuth flow never starts. Bearer-token MCP servers still work fine.

This is a regression: it worked a few days ago (sign-in buttons were visible, OAuth servers authenticated fine), it broke right after an update, and my entire team is affected identically — so it's not a local cache/credential issue. The same OAuth servers still work via CLI (e.g. Claude CLI), confirming the servers are healthy and the bug is in the desktop app's OAuth flow specifically.

Expected: sign-in button appears → browser OAuth flow → server authenticates.

Actual: no button, no prompt, servers unusable.

**App version:** 1.0.69-0

OS: Windows. Impact: all OAuth MCP integrations unusable app-wide for the whole team.

---
| Field | Value |
| --- | --- |
| App version | 1.0.15 |
| OS | Windows 10.0.26200 |
| Theme | GitHub |
| Path | /chat |
| Tenure | Week 2 |

未提及源文件或测试。使用应用版本 1.0.69-0 在 Windows 上的 MCP 设置中重现回归，将 OAuth 服务器与 bearer-token 服务器进行比较，并检查浏览器流程。当 OAuth MCP 服务器显示 Sign in 按钮、启动身份验证并成功完成身份验证时，即表示完成。

由索引模型根据 Issue 内容生成。