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/components/Sagi/Sagi.tsx

@@ -77,6 +77,7 @@ import {
   type ReactNode,
 } from "react";
 import { useNavigate } from "react-router-dom";
+import { useSettingsHref } from "../../lib/settingsLink";
 import { useTranslation } from "react-i18next";
 import { SagiAvatar } from "./SagiAvatar";
 import { PetSprite } from "./PetSprite";
@@ -215,6 +216,7 @@ function SagiBody() {
   const [hover, setHover] = useState(false);
   const reducedMotion = usePrefersReducedMotion();
   const navigate = useNavigate();
+  const href = useSettingsHref();
   const brain = useSagiBrain();
   const place = useSagiPosition(size);
 
@@ -348,7 +350,7 @@ function SagiBody() {
             onClose={() => setMenu(false)}
             onSettings={() => {
               setMenu(false);
-              navigate("/settings/appearance#pet");
+              navigate(href("appearance#pet"));
             }}
           />
         </SagiFlyout>