feat: pet chat window replaces the Sagi panel; Windows pane attach no longer crashes the server

- Sagi: clicking the pet opens its chat window directly (PetChat + SagiInfo
  status strip, Needs you, Mute / Clear alerts); SagiPanel removed.
- Chat view answers Claude's unnumbered folder-trust prompt (parseBareMenu).
- pty-attach: resize/write after a Windows attach exited, and node-pty's pipe
  errors, no longer throw out of the WebSocket handler.
- restart-helper: the server started by an update logs to
  data/agenthub-server.log instead of discarding its output.

client/src/i18n/locales/en/settings.json

@@ -37,18 +37,14 @@
     "chooseDesc": "Featured pets come from codex-pets.net and are downloaded into this install the first time you pick one. Your choice and size are saved to your account.",
     "uploadHint": "An image (PNG, JPEG, GIF, WebP — no SVG) is shown still; a .codex-pet.zip (pet.json + a 1536×1872 spritesheet.webp) is animated by mood.",
     "panel": {
-      "label": "{{name}} companion",
       "live": "Live",
       "offline": "Offline",
-      "close": "Close {{name}}",
       "statLive": "live",
       "statWaiting": "waiting",
       "statErrored": "errored",
       "mute": "Mute",
       "unmute": "Unmute",
       "clearAlerts": "Clear alerts",
-      "askPlaceholder": "Ask {{name}}… (e.g. any errors?)",
-      "ask": "Ask {{name}}",
       "send": "Send",
       "rename": "Click to rename {{name}}",
       "renameLabel": "Pet name",
@@ -217,9 +213,12 @@
     },
     "chat": {
       "label": "Chat with {{name}}",
-      "back": "Back",
       "close": "Close {{name}}",
       "new": "New chat",
+      "status": "Status — click to show the sessions that need you",
+      "endTitle": "End this chat?",
+      "endBody": "It is still writing a reply. A new chat stops this session.",
+      "endConfirm": "Stop and start new",
       "openWorkspace": "Open in workspace",
       "typing": "typing…",
       "placeholder": "Ask {{name}} anything…",