fix(profiles): a Codex switch reaches running and new sessions

Codex >= 0.164 sends every request through a shared app-server daemon that
outlives its TUIs and keeps the login it started with, so writing a new
auth.json changed nothing: open sessions and even new ones stayed on the
old (out-of-quota) account. After a switch, restart that CODEX_HOME's
daemon when one runs; open TUIs reconnect to it on their own (verified on
0.164.0 with two keys). The response says so (following), and the toast
tells the user running sessions follow.

server/lib/tool-profiles.js

@@ -6,7 +6,9 @@
  * swap it back in later, touching nothing but that login.
  *
  *   - `codex`: the whole `$CODEX_HOME/auth.json` (a ChatGPT login or an API
- *     key). Config, sessions, skills and history stay where they are.
+ *     key). Config, sessions, skills and history stay where they are. A
+ *     switch then restarts Codex's shared app-server daemon when one runs,
+ *     so running and new sessions follow the new login (`follow`).
  *   - `omp`: every credential Oh My Pi stores, read with `omp auth export`
  *     and put back with `omp auth import -` (secrets on stdin, never argv).
  *     Import MERGES, so a switch first empties omp's own credential tables in
@@ -85,6 +87,15 @@ const codex = {
     writeJson(codexAuthFile(), secret);
     return [codexAuthFile()];
   },
+  // Codex ≥ 0.164 talks to the API through a shared app-server daemon that
+  // outlives every TUI and holds the login it started with: a new auth.json
+  // reached neither a running session nor a NEW one, which kept the old
+  // (often out-of-quota) account. Restarting the daemon makes it read the new
+  // login, and every open TUI reconnects to it on its own (verified on
+  // 0.164.0). No daemon running: nothing to restart — the next one reads the file.
+  follow() {
+    return restartCodexDaemon();
+  },
   identify(auth) {
     if (auth.tokens && auth.tokens.id_token) {
       const c = jwtClaims(auth.tokens.id_token) || {};
@@ -107,6 +118,26 @@ const codex = {
   },
 };
 
+/** The control socket's link points into a per-user runtime dir that exists only while a daemon runs. */
+const codexDaemonSocket = () =>
+  path.join(getCodexHome(), "app-server-control", "app-server-control.sock");
+
+/** Restart the CODEX_HOME's app-server daemon when one is running; true when a restart was started. */
+function restartCodexDaemon() {
+  if (!fs.existsSync(codexDaemonSocket())) return false;
+  const bin = process.env.AGENTHUB_CODEX_BIN || require("./ai-tools").detect("codex").path;
+  if (!bin) return false;
+  cp.execFile(
+    bin,
+    ["app-server", "daemon", "restart"],
+    { env: { ...process.env, CODEX_HOME: getCodexHome() }, timeout: 60000, windowsHide: true },
+    (e) => {
+      if (e) console.warn(`[tool-profiles] codex daemon restart failed: ${e.message}`);
+    }
+  );
+  return true;
+}
+
 // ── Oh My Pi ───────────────────────────────────────────────────────────
 
 const ompDir = () => process.env.AGENTHUB_OMP_DIR || path.join(os.homedir(), ".omp");
@@ -405,7 +436,9 @@ function activateProfile(tool, name) {
   }
   const target = readProfile(tool, name);
   const written = a.write(target.secret, live);
-  return { ok: true, name, savedOutgoing, written };
+  // `following`: running sessions take the new login without a restart of their own.
+  const following = typeof a.follow === "function" ? a.follow() : false;
+  return { ok: true, name, savedOutgoing, written, following };
 }
 
 function deleteProfile(tool, name) {