feat: 添加 RSS 内存指示器并解绑 auto 权限模式与 TRANSCRIPT_CLASSIFIER

- 在 REPL 底栏添加 RSS 内存使用显示，512MB 以下 dimColor，512MB-1GB warning 色，1GB 以上 error 色
- auto 权限模式不再依赖 TRANSCRIPT_CLASSIFIER feature flag，classifier 不可用时 fallback 到 prompting
- Config 面板 defaultPermissionMode 使用类型安全的 permissionModeFromString，显示改用 shortTitle
- bypassPermissions title 缩短为 Bypass 与 shortTitle 一致

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/components/Settings/Config.tsx

@@ -16,6 +16,7 @@ import {
 import chalk from 'chalk';
 import {
   permissionModeTitle,
+  permissionModeShortTitle,
   permissionModeFromString,
   toExternalPermissionMode,
   isExternalPermissionMode,
@@ -167,6 +168,9 @@ export function Config({
   const thinkingEnabled = useAppState(s => s.thinkingEnabled);
   const isFastMode = useAppState(s => (isFastModeEnabled() ? s.fastMode : false));
   const promptSuggestionEnabled = useAppState(s => s.promptSuggestionEnabled);
+  const currentDefaultPermissionMode = permissionModeFromString(
+    settingsData?.permissions?.defaultMode ?? 'default',
+  );
   // Show auto in the default-mode dropdown when the user has opted in OR the
   // config is fully 'enabled' — even if currently circuit-broken ('disabled'),
   // an opted-in user should still see it in settings (it's a temporary state).
@@ -558,7 +562,7 @@ export function Config({
     {
       id: 'defaultPermissionMode',
       label: 'Default permission mode',
-      value: settingsData?.permissions?.defaultMode || 'default',
+      value: currentDefaultPermissionMode,
       options: (() => {
         const priorityOrder: PermissionMode[] = ['default', 'plan'];
         return [...priorityOrder, ...PERMISSION_MODES.filter(m => !priorityOrder.includes(m))];
@@ -1961,7 +1965,7 @@ export function Config({
                             </Text>
                           ) : setting.id === 'defaultPermissionMode' ? (
                             <Text color={isSelected ? 'suggestion' : undefined}>
-                              {permissionModeTitle(setting.value as PermissionMode)}
+                              {permissionModeShortTitle(setting.value as PermissionMode)}
                             </Text>
                           ) : setting.id === 'autoUpdatesChannel' && autoUpdaterDisabledReason ? (
                             <Box flexDirection="column">