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>

src/interactiveHelpers.tsx

@@ -52,7 +52,6 @@ import type { PermissionMode } from './utils/permissions/PermissionMode.js'
 import { getBaseRenderOptions } from './utils/renderOptions.js'
 import { getSettingsWithAllErrors } from './utils/settings/allErrors.js'
 import {
-  hasAutoModeOptIn,
   hasSkipDangerousModePermissionPrompt,
 } from './utils/settings/settings.js'
 
@@ -309,25 +308,6 @@ export async function showSetupScreens(
     ))
   }
 
-  if (feature('TRANSCRIPT_CLASSIFIER')) {
-    // Only show the opt-in dialog if auto mode actually resolved — if the
-    // gate denied it (org not allowlisted, settings disabled), showing
-    // consent for an unavailable feature is pointless. The
-    // verifyAutoModeGateAccess notification will explain why instead.
-    if (permissionMode === 'auto' && !hasAutoModeOptIn()) {
-      const { AutoModeOptInDialog } = await import(
-        './components/AutoModeOptInDialog.js'
-      )
-      await showSetupDialog(root, done => (
-        <AutoModeOptInDialog
-          onAccept={done}
-          onDecline={() => gracefulShutdownSync(1)}
-          declineExits
-        />
-      ))
-    }
-  }
-
   // --dangerously-load-development-channels confirmation. On accept, append
   // dev channels to any --channels list already set in main.tsx. Org policy
   // is NOT bypassed — gateChannelServer() still runs; this flag only exists