feat: 正式启用 auto mode (#307)

* fix: 修复settings.json内存状态溢出的问题

* fix: 修复auto mode gate check未处理的promise rejection

在 bypassPermissionsKillswitch.ts 的 useKickOffCheckAndDisableAutoModeIfNeeded
中，void fire-and-forget 调用缺少 .catch() 处理，导致 verifyAutoModeGateAccess
失败时产生 unhandled promise rejection。同时移除 permissionSetup.ts 中冗余的
null check。

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* feat: 开放 auto mode 和 bypass mode 给所有用户

通过 Shift+Tab 统一循环：default → acceptEdits → plan → auto → bypassPermissions → default

- 移除 USER_TYPE 分支判断，所有用户使用同一循环路径
- isBypassPermissionsModeAvailable 始终为 true
- isAutoModeAvailable 初始化直接为 true
- 移除 AutoModeOptInDialog 确认流程
- 简化 isAutoModeGateEnabled 仅保留快模式熔断器
- 简化 verifyAutoModeGateAccess 仅检查快模式
- 移除 GrowthBook/Statsig 远程门控
- bypass permissions killswitch 改为 no-op
- 新增 24 个测试覆盖循环逻辑和门控不变量

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* feat: 为sideQuery添加Langfuse追踪

sideQuery 绕过了 claude.ts 的主 API 路径，导致所有走 sideQuery 的调用
（auto mode classifier、permission explainer、session search 等）都没有
Langfuse 记录。现在为每次 sideQuery 调用创建独立 trace 并记录 LLM observation，
未配置 Langfuse 时全部 no-op。

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: ACP availableModes 补齐 bypassPermissions 并修正测试 import 路径

- ACP agent availableModes 按条件包含 bypassPermissions（非 root/sandbox）
- 顺序对齐 REPL 循环：default → acceptEdits → plan → auto → bypassPermissions
- 新增 2 个测试验证 availableModes 包含 bypassPermissions 及模式切换
- 修正 getNextPermissionMode.test.ts 和 permissionSetup.test.ts 的 import 路径

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

src/services/tips/tipRegistry.ts

@@ -109,7 +109,6 @@ const externalTips: Tip[] = [
       `Use Plan Mode to prepare for a complex request before making changes. Press ${getShortcutDisplay('chat:cycleMode', 'Chat', 'shift+tab')} twice to enable.`,
     cooldownSessions: 5,
     isRelevant: async () => {
-      if (process.env.USER_TYPE === 'ant') return false
       const config = getGlobalConfig()
       // Show to users who haven't used plan mode recently (7+ days)
       const daysSinceLastUse = config.lastPlanModeUse
@@ -401,9 +400,7 @@ const externalTips: Tip[] = [
   {
     id: 'shift-tab',
     content: async () =>
-      process.env.USER_TYPE === 'ant'
-        ? `Hit ${getShortcutDisplay('chat:cycleMode', 'Chat', 'shift+tab')} to cycle between default mode and auto mode`
-        : `Hit ${getShortcutDisplay('chat:cycleMode', 'Chat', 'shift+tab')} to cycle between default mode, auto-accept edit mode, and plan mode`,
+      `Hit ${getShortcutDisplay('chat:cycleMode', 'Chat', 'shift+tab')} to cycle between default, accept edits, plan, auto, and bypass modes`,
     cooldownSessions: 10,
     isRelevant: async () => true,
   },