fix(tests): mock name_color_modal in test_cli_start_selector setUp

On a self-hosted KVM runner the process has a real controlling terminal
so name_color_modal successfully opens /dev/tty and enters a curses
loop waiting for keyboard input, hanging the test indefinitely.

Docker containers (ubuntu-latest runners) don't have a real /dev/tty,
causing an OSError that triggers the existing fallback — this is why
the hang was invisible in ubuntu-latest CI.

Also add timeout=5 to _daemon_reachable() to match the same defensive
fix already applied to docker_available() in tests/_docker.py.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

bot_bottle/backend/docker/setup.py

@@ -27,10 +27,14 @@ def _docker_on_path() -> bool:
 def _daemon_reachable() -> bool:
     if not _docker_on_path():
         return False
-    return subprocess.run(
-        ["docker", "info"],
-        stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL, check=False,
-    ).returncode == 0
+    try:
+        return subprocess.run(
+            ["docker", "info"],
+            stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL,
+            check=False, timeout=5,
+        ).returncode == 0
+    except subprocess.TimeoutExpired:
+        return False
 
 
 def _print_install_pointer() -> None: