Add danbooru-mcp auto-start, git sync, status API endpoints, navbar status indicators, and LLM format retry

- app.py: add subprocess import; add _ensure_mcp_repo() to clone/pull
  danbooru-mcp from https://git.liveaodh.com/aodhan/danbooru-mcp into
  tools/danbooru-mcp/ at startup; add ensure_mcp_server_running() which
  calls _ensure_mcp_repo() then starts the Docker container if not running;
  add GET /api/status/comfyui and GET /api/status/mcp health endpoints;
  fix call_llm() to retry up to 3 times on unexpected response format
  (KeyError/IndexError), logging the raw response and prompting the LLM
  to respond with valid JSON before each retry
- templates/layout.html: add ComfyUI and MCP status dot indicators to
  navbar; add polling JS that checks both endpoints on load and every 30s
- static/style.css: add .service-status, .status-dot, .status-ok,
  .status-error, .status-checking styles and status-pulse keyframe animation
- .gitignore: add tools/ to exclude the cloned danbooru-mcp repo

templates/generator.html

@@ -174,7 +174,7 @@
         <div class="col-md-7">
             <div class="card">
                 <div class="card-header bg-dark text-white">Result</div>
-                <div class="card-body p-0 d-flex align-items-center justify-content-center" style="min-height: 500px; background-color: #eee;" id="result-container">
+                <div class="card-body p-0 d-flex align-items-center justify-content-center" style="min-height: 500px;" id="result-container">
                     {% if generated_image %}
                     <div class="img-container w-100 h-100">
                         <img src="{{ url_for('static', filename='uploads/' + generated_image) }}" alt="Generated Result" class="img-fluid w-100" id="result-img">
@@ -198,11 +198,6 @@
 {% endblock %}
 
 {% block scripts %}
-<style>
-    .mix-item:hover { background-color: rgba(0,0,0,.04); }
-    .mix-item { user-select: none; }
-    #mixAccordion .accordion-button { font-size: .9rem; }
-</style>
 <script>
     // --- Filtering ---
     function filterMixCategory(input, listId) {