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/__tests__/tool-profiles.test.js

@@ -97,6 +97,33 @@ describe("tool-profiles: codex", () => {
     );
   });
 
+  it("restarts a running Codex daemon so open sessions follow; none running, nothing to restart", async () => {
+    login("acct-a", "alice@example.com");
+    profiles.saveProfile("codex");
+    login("acct-b", "bob@example.com");
+    profiles.saveProfile("codex");
+    assert.equal(profiles.activateProfile("codex", "alice").following, false);
+
+    const log = path.join(ROOT, "codex-argv.log");
+    const bin = path.join(ROOT, "fake-codex.sh");
+    fs.writeFileSync(bin, `#!/bin/sh\necho "$CODEX_HOME $*" >> '${log}'\n`, { mode: 0o755 });
+    const sock = path.join(process.env.CODEX_HOME, "app-server-control", "app-server-control.sock");
+    fs.mkdirSync(path.dirname(sock), { recursive: true });
+    fs.writeFileSync(sock, "");
+    process.env.AGENTHUB_CODEX_BIN = bin;
+    try {
+      assert.equal(profiles.activateProfile("codex", "bob").following, true);
+      for (let i = 0; i < 50 && !fs.existsSync(log); i++)
+        await new Promise((r) => setTimeout(r, 20));
+      assert.equal(
+        fs.readFileSync(log, "utf8").trim(),
+        `${process.env.CODEX_HOME} app-server daemon restart`
+      );
+    } finally {
+      delete process.env.AGENTHUB_CODEX_BIN;
+    }
+  });
+
   it("refuses to switch away from an unsaved login", () => {
     login("acct-a", "alice@example.com");
     profiles.saveProfile("codex");