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/Sidebar.tsx

@@ -1,6 +1,6 @@
 /**
  * @file Sidebar.tsx
- * @description The app's left sidebar: the brand, the navigation links and the workspace list, with Settings and the collapse/expand button pinned to its foot. It also owns the connection details modal (opened from the status bar), which carries the version and the update check — the sidebar itself has no footer, language or theme controls (those live in Settings → General / Appearance). The collapsed state is kept in localStorage; with none stored it starts collapsed below Tailwind's `lg`. Below `md` the Layout turns it into an off-canvas drawer (`drawer` prop): a modal dialog with the shared `useDialog` focus contract.
+ * @description The app's left sidebar: the brand, the navigation links and the workspace list, with Settings (on a workspace, that workspace's Settings tab — `lib/settingsLink.ts`) and the collapse/expand button pinned to its foot. It also owns the connection details modal (opened from the status bar), which carries the version and the update check — the sidebar itself has no footer, language or theme controls (those live in Settings → General / Appearance). The collapsed state is kept in localStorage; with none stored it starts collapsed below Tailwind's `lg`. Below `md` the Layout turns it into an off-canvas drawer (`drawer` prop): a modal dialog with the shared `useDialog` focus contract.
  * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
  */
 /* =============================================================================
@@ -49,7 +49,8 @@
 
 import { useCallback, useEffect, useMemo, useRef, useState } from "react";
 import { createPortal } from "react-dom";
-import { NavLink } from "react-router-dom";
+import { NavLink, useLocation } from "react-router-dom";
+import { settingsHref } from "../lib/settingsLink";
 import { useTranslation } from "react-i18next";
 import { useDialog } from "../hooks/useDialog";
 import {
@@ -186,6 +187,12 @@ export function Sidebar({
 }: SidebarProps) {
   const { t } = useTranslation();
   const auth = useAuth();
+  // On a workspace Settings opens as its tab (lib/settingsLink.ts), so the
+  // link's own match (the path) cannot tell when it is the one on screen.
+  const location = useLocation();
+  const settingsOn =
+    location.pathname.startsWith("/settings") ||
+    new URLSearchParams(location.search).has("settings");
   // Checking for (and applying) an update acts on the host: an admin's.
   const canUpdate = usePermissions().isAdmin;
   const asideRef = useRef<HTMLElement>(null);
@@ -533,9 +540,9 @@ export function Sidebar({
         }`}
       >
         <NavLink
-          to="/settings"
+          to={settingsHref("", location)}
           title={collapsed ? t("nav:settings") : undefined}
-          className={(p) => `${navClass(p)} ${collapsed ? "" : "flex-1"}`}
+          className={() => `${navClass({ isActive: settingsOn })} ${collapsed ? "" : "flex-1"}`}
         >
           <Settings className="w-4 h-4 flex-shrink-0" />
           {!collapsed && <span>{t("nav:settings")}</span>}