diff --git a/desktop/package.json b/desktop/package.json
index c4f3be79..a37bed0b 100644
--- a/desktop/package.json
+++ b/desktop/package.json
@@ -1,7 +1,7 @@
 {
   "name": "claude-code-desktop",
   "private": true,
-  "version": "0.6.3",
+  "version": "0.6.4",
   "description": "Desktop coding agent workbench for Claude Code Haha.",
   "homepage": "https://github.com/NanmiCoder/cc-haha",
   "author": {
diff --git a/release-notes/v0.6.4.md b/release-notes/v0.6.4.md
new file mode 100644
index 00000000..d536fa2b
--- /dev/null
+++ b/release-notes/v0.6.4.md
@@ -0,0 +1,74 @@
+# Claude Code Haha v0.6.4
+
+本次以修复 **Agent Teams 用错模型** 为主，另有一批桌面端问题修复。
+
+**建议所有 0.6.3 用户更新**：如果你使用 DeepSeek 等第三方映射模型，0.6.3 的团队成员会以 `claude-opus-4-8` 发起请求，可能被上游路由到最贵的模型并产生额外费用。
+
+## Agent Teams 模型修复
+
+0.6.3 中，没有单独指定模型的团队成员会被硬编码为 Claude Opus 4.8。在 cc-switch DeepSeek 这类映射供应商下，这个第一方模型 ID 会被上游按最贵档位处理（DeepSeek 官方会把它路由到 DeepSeek V4 Pro），而不是你实际选择的 DeepSeek Flash。
+
+- 未指定模型的成员现在**跟随主会话当前使用的模型**，不再回退到硬编码 Opus。
+- Agent 页面上的模型别名（如 `opus`）会经过供应商映射解析，在第三方供应商下落到该供应商自己的模型槽位。
+- 在 `/config` 中显式固定的成员模型仍然优先，行为不变。
+
+## 其他修复
+
+- **团队成员权限审批**：成员发起的权限请求会转发到主会话的审批弹窗并标明成员名称，不再一直等待无人处理的审批。
+- **会话列表加载**：本地索引为空或仍在构建时不再回退到全量扫描 JSONL，打开侧边栏或 Trace 页不会再长时间卡住。
+- **窗口拖拽**：恢复侧边栏和工作区顶栏空白区域的窗口拖动。
+- **输入框**：上下文用量改为紧凑环形指示，不再挤占输入框；短项目列表不再显示多余的折叠按钮。
+- **模型配置**：连通性测试返回的长错误不再把按钮挤成两行。
+
+## 安装
+
+请在下方 Assets 中下载对应平台和架构的安装包：
+
+SignPath 官方审批尚未完成，本次 Windows 应用和安装包**暂未签名**；macOS 安装包已签名并完成公证。
+
+- macOS：`Claude-Code-Haha-0.6.4-mac-arm64.dmg` / `Claude-Code-Haha-0.6.4-mac-x64.dmg`
+- Windows：`Claude-Code-Haha-0.6.4-win-x64.exe` / `Claude-Code-Haha-0.6.4-win-arm64.exe`
+- Linux x64：`Claude-Code-Haha-0.6.4-linux-x86_64.AppImage`、`Claude-Code-Haha-0.6.4-linux-amd64.deb` 或 `Claude-Code-Haha-0.6.4-linux-x86_64.rpm`
+- Linux ARM64：`Claude-Code-Haha-0.6.4-linux-arm64.AppImage`、`Claude-Code-Haha-0.6.4-linux-arm64.deb` 或 `Claude-Code-Haha-0.6.4-linux-aarch64.rpm`
+
+**完整变更：**[v0.6.3...v0.6.4](https://github.com/NanmiCoder/cc-haha/compare/v0.6.3...v0.6.4)
+
+<details>
+<summary><b>English Version</b></summary>
+
+# Claude Code Haha v0.6.4
+
+This release is centered on a fix for **Agent Teams picking the wrong model**, plus a batch of desktop fixes.
+
+**Everyone on 0.6.3 should update**: with a mapped third-party provider such as DeepSeek, teammates were requested as `claude-opus-4-8`, which the upstream could route to its most expensive model and bill accordingly.
+
+## Agent Teams model fix
+
+In 0.6.3, a teammate with no model of its own was hardcoded to Claude Opus 4.8. Under a mapped provider such as cc-switch DeepSeek, that first-party model ID is treated as the most expensive tier upstream (DeepSeek routes it to DeepSeek V4 Pro), instead of the DeepSeek Flash you actually selected.
+
+- Members without a model now **follow the lead session's current model** instead of falling back to a hardcoded Opus.
+- Model aliases on the Agent page (such as `opus`) are resolved through the provider mapping, landing on that provider's own slot rather than a first-party Opus ID.
+- A model explicitly pinned in `/config` still wins, unchanged.
+
+## Other fixes
+
+- **Teammate permission prompts**: requests raised by a member are forwarded to the lead session's approval dialog and labeled with the member's name, instead of waiting on an approval nobody could answer.
+- **Session list loading**: an empty or still-building local index no longer falls back to scanning every JSONL, so opening the sidebar or the Trace page no longer hangs.
+- **Window dragging**: restores window dragging on the sidebar and the empty workspace header strip.
+- **Composer**: context usage becomes a compact ring instead of eating the input width, and short project lists no longer show a fold button.
+- **Model settings**: long errors from a connection test no longer squash the button into two lines.
+
+## Installation
+
+Download the installer for your platform and architecture from the Assets section below:
+
+Windows applications and installers in this release are **unsigned** while SignPath approval is pending. macOS builds are signed and notarized.
+
+- macOS: `Claude-Code-Haha-0.6.4-mac-arm64.dmg` / `Claude-Code-Haha-0.6.4-mac-x64.dmg`
+- Windows: `Claude-Code-Haha-0.6.4-win-x64.exe` / `Claude-Code-Haha-0.6.4-win-arm64.exe`
+- Linux x64: `Claude-Code-Haha-0.6.4-linux-x86_64.AppImage`, `Claude-Code-Haha-0.6.4-linux-amd64.deb` or `Claude-Code-Haha-0.6.4-linux-x86_64.rpm`
+- Linux ARM64: `Claude-Code-Haha-0.6.4-linux-arm64.AppImage`, `Claude-Code-Haha-0.6.4-linux-arm64.deb` or `Claude-Code-Haha-0.6.4-linux-aarch64.rpm`
+
+**Full changelog:** [v0.6.3...v0.6.4](https://github.com/NanmiCoder/cc-haha/compare/v0.6.3...v0.6.4)
+
+</details>