fix(termux): harden execute_code and mobile browser/audio UX

tests/hermes_cli/test_doctor.py

@@ -245,3 +245,46 @@ def test_run_doctor_termux_treats_docker_and_browser_warnings_as_expected(monkey
     assert "Node.js not found (browser tools are optional in the tested Termux path)" in out
     assert "Install Node.js on Termux with: pkg install nodejs" in out
     assert "docker not found (optional)" not in out
+
+
+def test_run_doctor_termux_does_not_mark_browser_available_without_agent_browser(monkeypatch, tmp_path):
+    home = tmp_path / ".hermes"
+    home.mkdir(parents=True, exist_ok=True)
+    (home / "config.yaml").write_text("memory: {}\n", encoding="utf-8")
+    project = tmp_path / "project"
+    project.mkdir(exist_ok=True)
+
+    monkeypatch.setenv("TERMUX_VERSION", "0.118.3")
+    monkeypatch.setenv("PREFIX", "/data/data/com.termux/files/usr")
+    monkeypatch.setattr(doctor_mod, "HERMES_HOME", home)
+    monkeypatch.setattr(doctor_mod, "PROJECT_ROOT", project)
+    monkeypatch.setattr(doctor_mod, "_DHH", str(home))
+    monkeypatch.setattr(doctor_mod.shutil, "which", lambda cmd: "/data/data/com.termux/files/usr/bin/node" if cmd in {"node", "npm"} else None)
+
+    fake_model_tools = types.SimpleNamespace(
+        check_tool_availability=lambda *a, **kw: (["terminal"], [{"name": "browser", "env_vars": [], "tools": ["browser_navigate"]}]),
+        TOOLSET_REQUIREMENTS={
+            "terminal": {"name": "terminal"},
+            "browser": {"name": "browser"},
+        },
+    )
+    monkeypatch.setitem(sys.modules, "model_tools", fake_model_tools)
+
+    try:
+        from hermes_cli import auth as _auth_mod
+        monkeypatch.setattr(_auth_mod, "get_nous_auth_status", lambda: {})
+        monkeypatch.setattr(_auth_mod, "get_codex_auth_status", lambda: {})
+    except Exception:
+        pass
+
+    import io, contextlib
+    buf = io.StringIO()
+    with contextlib.redirect_stdout(buf):
+        doctor_mod.run_doctor(Namespace(fix=False))
+    out = buf.getvalue()
+
+    assert "✓ browser" not in out
+    assert "browser" in out
+    assert "system dependency not met" in out
+    assert "agent-browser is not installed (expected in the tested Termux path)" in out
+    assert "npm install -g agent-browser && agent-browser install" in out