polish: extract inline CSS, add connection status, panel macro, favicon, ollama cache, toast system (#164)

Major:
- Extract all inline <style> blocks from 22 Jinja2 templates into
  static/css/mission-control.css — single cacheable stylesheet
- Add tox lint check that fails on inline <style> in templates

Minor:
1. Connection status indicator in topbar (green/amber/red dot) reflecting
   WebSocket + Ollama reachability, with auto-reconnect
2. Jinja2 {% macro panel(title) %} in macros.html — eliminates repeated
   .card.mc-panel markup; index.html converted as example
3. SVG favicon (purple T + orange dot)
4. 30-second TTL cache on _check_ollama() to avoid blocking the event loop
   on every health poll (asyncio.to_thread was already in place)
5. Toast notification system (McToast.show) for transient status messages —
   wired into connection status for Ollama/WebSocket state changes

Enforcement:
- CLAUDE.md updated with conventions 11-14 (no inline CSS, use panel macro,
  use toasts, never block the event loop)
- tox lint + pre-push environments now fail on inline <style> blocks

https://claude.ai/code/session_014FQ785MQdyJQ4BAXrRSo9w

Co-authored-by: Claude <noreply@anthropic.com>

src/dashboard/templates/voice_button.html

@@ -2,97 +2,7 @@
 
 {% block title %}{{ page_title }}{% endblock %}
 
-{% block extra_styles %}
-<style>
-  .voice-page {
-    max-width: 600px;
-    margin: 0 auto;
-    text-align: center;
-  }
-
-  .voice-button {
-    width: 160px;
-    height: 160px;
-    border-radius: 50%;
-    background: linear-gradient(135deg, var(--border-glow), var(--purple));
-    border: none;
-    color: white;
-    font-size: 3.5rem;
-    cursor: pointer;
-    transition: transform 0.2s, box-shadow 0.3s;
-    display: flex;
-    align-items: center;
-    justify-content: center;
-    margin: 30px auto;
-    box-shadow: 0 0 40px rgba(124, 58, 237, 0.3);
-    -webkit-tap-highlight-color: transparent;
-    touch-action: manipulation;
-  }
-  .voice-button:hover {
-    transform: scale(1.05);
-    box-shadow: 0 0 60px rgba(124, 58, 237, 0.5);
-  }
-  .voice-button:active, .voice-button.listening {
-    transform: scale(0.95);
-    background: linear-gradient(135deg, var(--red), var(--red-dim));
-    box-shadow: 0 0 60px rgba(255, 68, 85, 0.5);
-    animation: pulse-listen 1s infinite;
-  }
-  @keyframes pulse-listen {
-    0%, 100% { box-shadow: 0 0 40px rgba(255, 68, 85, 0.5); }
-    50% { box-shadow: 0 0 80px rgba(255, 68, 85, 0.8); }
-  }
-
-  .voice-status {
-    font-size: 1rem;
-    color: var(--text-dim);
-    margin-bottom: 16px;
-    letter-spacing: 0.06em;
-  }
-
-  .voice-result {
-    background: rgba(24, 10, 45, 0.8);
-    border: 1px solid var(--border);
-    border-radius: var(--radius-md);
-    padding: 16px;
-    margin-top: 20px;
-    text-align: left;
-  }
-  .voice-transcript {
-    font-size: 0.95rem;
-    margin-bottom: 12px;
-    color: var(--text);
-  }
-  .voice-response {
-    color: var(--purple);
-    font-style: italic;
-  }
-
-  .voice-tips {
-    margin-top: 24px;
-    padding: 16px;
-    background: rgba(24, 10, 45, 0.6);
-    border: 1px solid var(--border);
-    border-radius: var(--radius-md);
-    text-align: left;
-  }
-  .voice-tips h3 {
-    font-size: 0.85rem;
-    color: var(--text-bright);
-    margin-bottom: 10px;
-  }
-  .voice-tips ul {
-    color: var(--text-dim);
-    line-height: 2;
-    padding-left: 18px;
-    font-size: 0.85rem;
-  }
-
-  @media (max-width: 768px) {
-    .voice-button { width: 140px; height: 140px; font-size: 3rem; }
-  }
-</style>
-{% endblock %}
+{% block extra_styles %}{% endblock %}
 
 {% block content %}
 <div class="voice-page py-3">