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/commands/login/login.tsx

@@ -18,9 +18,7 @@ import type { LocalJSXCommandOnDone } from '../../types/command.js'
 import { stripSignatureBlocks } from '../../utils/messages.js'
 import {
   checkAndDisableAutoModeIfNeeded,
-  checkAndDisableBypassPermissionsIfNeeded,
   resetAutoModeGateCheck,
-  resetBypassPermissionsCheck,
 } from '../../utils/permissions/bypassPermissionsKillswitch.js'
 import { resetUserCache } from '../../utils/user.js'
 
@@ -54,20 +52,13 @@ export async function call(
           // Enroll as a trusted device for Remote Control (10-min fresh-session window)
           void enrollTrustedDevice()
           // Reset killswitch gate checks and re-run with new org
-          resetBypassPermissionsCheck()
+          resetAutoModeGateCheck()
           const appState = context.getAppState()
-          void checkAndDisableBypassPermissionsIfNeeded(
+          void checkAndDisableAutoModeIfNeeded(
             appState.toolPermissionContext,
             context.setAppState,
+            appState.fastMode,
           )
-          if (feature('TRANSCRIPT_CLASSIFIER')) {
-            resetAutoModeGateCheck()
-            void checkAndDisableAutoModeIfNeeded(
-              appState.toolPermissionContext,
-              context.setAppState,
-              appState.fastMode,
-            )
-          }
           // Increment authVersion to trigger re-fetching of auth-dependent data in hooks (e.g., MCP servers)
           context.setAppState(prev => ({
             ...prev,