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.

server/__tests__/lane-sources.test.js

@@ -238,6 +238,17 @@ describe("lane-sources instructions and launch", () => {
     src.setInstructions(codexLane.id, null);
   });
 
+  it("puts the owner's own agent instructions before the workspace's", () => {
+    src.setUserInstructions("local", "# my style\n- small diffs");
+    const { systemPrompt, systemPromptFile } = src.launchExtras(lane.id, "claude");
+    assert.match(systemPrompt, /^# my style\n- small diffs\n\n- always answer in Vietnamese/);
+    assert.equal(fs.readFileSync(systemPromptFile, "utf8"), systemPrompt);
+    // A workspace with nothing of its own still gets them.
+    assert.match(src.launchExtras(otherLane.id, "claude").systemPrompt, /^# my style/);
+    src.setUserInstructions("local", null);
+    assert.equal(src.launchExtras(otherLane.id, "claude").systemPrompt, null);
+  });
+
   it("gives an unsupported tool nothing, and skips a vanished folder", () => {
     assert.deepEqual(src.launchExtras(lane.id, "gemini"), {
       addDirs: [],