fix: clients sync to server terminals instead of creating new ones

- Remove auto-creation of terminal sessions from init/selectSession/switchAgent
- Clients only connect to existing alive terminals from server registry
- Remove localStorage persistence (agent/sessionId) — state derived from server
- Refine session-state types: new AgentStatus values, LastError interface
- UI improvements: AgentBadge, ChatContainer, UserInput, BashCard updates
- Simplify claude-hook routes, update session-state service

frontend/src/pages/TranscriptDebugPage.vue

@@ -20,6 +20,7 @@ const {
   processing,
   ephemeral,
   terminalReady,
+  hookMeta,
   init,
   switchAgent,
   selectSession,
@@ -144,6 +145,7 @@ onUnmounted(() => {
             :voice-transcript="voiceTranscript + voiceInterim"
             :last-audio-url="lastAudioUrl"
             :is-playing-audio="isPlayingAudio"
+            :hook-permission-mode="hookMeta.permissionMode"
             @send="handleSend"
             @create-session="handleCreateSession"
             @start-recording="voice.startRecording()"