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/screens/REPL.tsx

@@ -422,9 +422,7 @@ import { usePromptsFromClaudeInChrome } from 'src/hooks/usePromptsFromClaudeInCh
 import { getTipToShowOnSpinner, recordShownTip } from 'src/services/tips/tipScheduler.js';
 import type { Theme } from 'src/utils/theme.js';
 import {
-  checkAndDisableBypassPermissionsIfNeeded,
   checkAndDisableAutoModeIfNeeded,
-  useKickOffCheckAndDisableBypassPermissionsIfNeeded,
   useKickOffCheckAndDisableAutoModeIfNeeded,
 } from 'src/utils/permissions/bypassPermissionsKillswitch.js';
 import { SandboxManager } from 'src/utils/sandbox/sandbox-adapter.js';
@@ -434,7 +432,6 @@ import { SandboxPermissionRequest } from 'src/components/permissions/SandboxPerm
 import { SandboxViolationExpandedView } from 'src/components/SandboxViolationExpandedView.js';
 import { useSettingsErrors } from 'src/hooks/notifs/useSettingsErrors.js';
 import { useMcpConnectivityStatus } from 'src/hooks/notifs/useMcpConnectivityStatus.js';
-import { useAutoModeUnavailableNotification } from 'src/hooks/notifs/useAutoModeUnavailableNotification.js';
 import { AUTO_MODE_DESCRIPTION } from 'src/components/AutoModeOptInDialog.js';
 import { useLspInitializationNotification } from 'src/hooks/notifs/useLspInitializationNotification.js';
 import { useLspPluginRecommendation } from 'src/hooks/useLspPluginRecommendation.js';
@@ -948,7 +945,6 @@ export function REPL({
     [toolPermissionContext, proactiveActive, isBriefOnly],
   );
 
-  useKickOffCheckAndDisableBypassPermissionsIfNeeded();
   useKickOffCheckAndDisableAutoModeIfNeeded();
 
   const [dynamicMcpConfig, setDynamicMcpConfig] = useState<Record<string, ScopedMcpServerConfig> | undefined>(
@@ -1006,7 +1002,6 @@ export function REPL({
   useCanSwitchToExistingSubscription();
   useIDEStatusIndicator({ ideSelection, mcpClients, ideInstallationStatus });
   useMcpConnectivityStatus({ mcpClients });
-  useAutoModeUnavailableNotification();
   usePluginInstallationStatus();
   usePluginAutoupdateNotification();
   useSettingsErrors();
@@ -3314,8 +3309,8 @@ export function REPL({
       queryCheckpoint('query_context_loading_start');
       const [, , defaultSystemPrompt, baseUserContext, systemContext] = await Promise.all([
         // IMPORTANT: do this after setMessages() above, to avoid UI jank
-        checkAndDisableBypassPermissionsIfNeeded(toolPermissionContext, setAppState),
-        // Gated on TRANSCRIPT_CLASSIFIER so GrowthBook kill switch runs wherever auto mode is built in
+        undefined,
+        // Fast-mode circuit breaker check
         feature('TRANSCRIPT_CLASSIFIER')
           ? checkAndDisableAutoModeIfNeeded(toolPermissionContext, setAppState, store.getState().fastMode)
           : undefined,