Feature/add auto mode settings and fix bug (#368)

* refactor: 将 convertMessagesToLangfuse 参数类型从 unknown 收窄为联合类型

将 readonly unknown[] 改为 readonly LangfuseInputMessage[]，
其中 LangfuseInputMessage = UserMessage | AssistantMessage | ChatCompletionMessageParam，
让调用方获得编译期类型检查。

* fix: 修复 Config 面板第二次进入时左右键无反应的问题

将左右键枚举值切换从依赖 DOM 焦点的 onKeyDown 改为 useKeybindings 系统，
确保按键在任何焦点状态下都能正确响应。同时修复 isSearchMode 初始值和布局问题。

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

* fix: 修复 PowerShellTool.isSearchOrReadCommand 在 input 为 undefined 时崩溃的问题

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

* 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>

* fix: 同步 permissionModeTitle 测试断言与 bypassPermissions 的新 title 值

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

---------

Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>

src/components/PromptInput/PromptInputFooterLeftSide.tsx

@@ -42,7 +42,7 @@ import { usePrStatus } from '../../hooks/usePrStatus.js'
 import { Byline, KeyboardShortcutHint } from '@anthropic/ink'
 import { useTerminalSize } from '../../hooks/useTerminalSize.js'
 import { useTasksV2 } from '../../hooks/useTasksV2.js'
-import { formatDuration } from '../../utils/format.js'
+import { formatDuration, formatFileSize } from '../../utils/format.js'
 import { VoiceWarmupHint } from './VoiceIndicator.js'
 import { useVoiceEnabled } from '../../hooks/useVoiceEnabled.js'
 import { useVoiceState } from '../../context/voice.js'
@@ -63,6 +63,26 @@ const NO_OP_SUBSCRIBE = (_cb: () => void) => () => {}
 const NULL = () => null
 const MAX_VOICE_HINT_SHOWS = 3
 
+const RSS_UPDATE_INTERVAL_MS = 5_000
+
+type RssState = { text: string; level: 'normal' | 'warning' | 'error' }
+
+function useRssDisplay(): RssState | null {
+  const [state, setState] = useState<RssState | null>(null)
+  useEffect(() => {
+    function update(): void {
+      const mb = process.memoryUsage().rss / (1024 * 1024)
+      const level = mb >= 1024 ? 'error' : mb >= 512 ? 'warning' : 'normal'
+      const text = formatFileSize(mb * 1024 * 1024)
+      setState(prev => (prev?.text === text ? prev : { text, level }))
+    }
+    update()
+    const timer = setInterval(update, RSS_UPDATE_INTERVAL_MS)
+    return () => clearInterval(timer)
+  }, [])
+  return state
+}
+
 type Props = {
   exitMessage: {
     show: boolean
@@ -315,6 +335,7 @@ function ModeIndicator({
   const isKillAgentsConfirmShowing = useAppState(
     s => s.notifications.current?.key === 'kill-agents-confirm',
   )
+  const rssState = useRssDisplay()
 
   // Derive team info from teamContext (no filesystem I/O needed)
   // Match the same logic as TeamStatus to avoid trailing separator
@@ -428,6 +449,18 @@ function ModeIndicator({
           />,
         ]
       : []),
+    // RSS memory indicator — always visible
+    ...(rssState
+      ? [
+          <Text
+            key="rss"
+            dimColor={rssState.level === 'normal'}
+            color={rssState.level === 'error' ? 'error' : rssState.level === 'warning' ? 'warning' : undefined}
+          >
+            {rssState.text}
+          </Text>,
+        ]
+      : []),
   ]
 
   // Check if any in-process teammates exist (for hint text cycling)