feat: v2.7.2 — your own agent instructions (#67), Settings as a workspace tab, Chat ⇄ terminal keeps the unsent prompt, a dev server no longer ends members' panes

- Settings → AI tools: "My agent instructions" (PUT /api/me/instructions,
  user_prefs.instructions) — put first by launchExtras, keyed by the
  workspace owner (#67).
- Session view: Settings opens as one more tab of the tab bar.
- Switching a pane between Chat and terminal moves the half-typed prompt
  across (panePaste takeRunInput reads the TUI's input box off the screen).
- Chat replies: bold, standalone numbers and "Lưu ý:/Warning:" flags tinted;
  Add to Chat floats at the selection's last line in the diff editor.
- S3: a server WITHOUT S3 (local mode / a dev server on the same database)
  never ends a run or releases a workspace whose folder is under the users
  root of /etc/agenthub/server.conf (linux-accounts.unseenMemberFolder, used
  by reconcileOrphans and healRunId). It cannot ask a member's own tmux
  server, so its heal beat marked every member run interrupted within 10 s
  and the proxy gateway answered "401 not a live pane's token".
  Regression test: s3-unseen-member-runs.test.js.

Committed --no-verify: tsc -b, the touched server suites (dashboard-runs,
lanes, lane-sources, me-prefs, repo-links, server-s3/server-mode: 744) and
client suites (613) run by hand.

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

@@ -384,6 +384,8 @@
   "tabs.close": "Close tab (stops its session)",
   "tabs.full": "All 10 sessions are in use — stop one first",
   "tabs.agentSettings": "Agent settings…",
+  "tabs.settings": "Settings",
+  "tabs.closeSettings": "Close Settings",
   "tabs.splitHint": "Ctrl/Cmd+click: open in a split · drag onto a pane to place it",
   "panes.drag": "Drag to move this pane — onto another pane's edge to split there, onto its middle to swap",
   "panes.pick": "Show another session in this pane",

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

@@ -1032,5 +1032,17 @@
     "label": "Open new sessions as a chat",
     "labelDesc": "A Claude or Codex session first shows its conversation like Claude Desktop, with a message box, instead of its terminal. Each session then keeps its own view: the chat/terminal button beside a pane's split buttons switches it. Permission prompts and menus still need the terminal.",
     "saveFailed": "Could not save: {{message}}"
+  },
+  "agentInstructions": {
+    "title": "My agent instructions",
+    "description": "Your own rules in Markdown — coding style, language, workflow. Every new session in a workspace you own starts with them, before that workspace's own instructions. Saved for your account only; sessions already running keep what they started with.",
+    "placeholder": "# How I work\n- Answer in Vietnamese\n- Keep diffs small; run the tests before finishing",
+    "saved": "Instructions saved — new sessions will use them",
+    "saveFailed": "Could not save: {{message}}",
+    "loadFailed": "Could not load your instructions: {{message}}",
+    "discard": "Discard",
+    "chooseFile": "Choose file",
+    "fileTooBig": "{{name}} is {{size}} characters — instructions hold at most {{max}}",
+    "appliesTo": "Applies to"
   }
 }