feat: VoiceCoach v2 — livekit-agents 1.5 personal voice assistant

Replaces pipecat 0.0.48 (6 manual patches, DuplicateIdentity reconnect storms)
with livekit-agents 1.5 SDK. New features:
- SvelteKit UI with live transcript, VAD ring, mode bar, vocal meter, history view
- SQLite session store with WAL mode (cross-session memory)
- Async SpeechBrain vocal/emotion analysis injected per turn
- Homelab tools: SSH/docker, Prometheus alerts, Home Assistant, SearXNG search
- OpenClaw LLM gateway preserved (qwen2.5:14b via Ollama)
- 4 modes: coaching, vent, practice, briefing

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

compose/hf-pdocker-01/voicecoach-v2/web-client/src/app.css

@@ -0,0 +1,40 @@
+*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
+
+:root {
+  --bg: #0f1117;
+  --surface: #1a1d27;
+  --surface2: #22263a;
+  --accent: #6c63ff;
+  --accent2: #4ecdc4;
+  --text: #e8eaf0;
+  --muted: #7b8094;
+  --danger: #ff5252;
+  --success: #4caf50;
+  --warn: #ffc107;
+  --radius: 12px;
+  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
+}
+
+html, body { height: 100%; background: var(--bg); color: var(--text); font-family: var(--font); }
+
+button {
+  cursor: pointer;
+  border: none;
+  font-family: inherit;
+  font-size: 0.875rem;
+  font-weight: 500;
+  border-radius: var(--radius);
+  padding: 0.5rem 1.2rem;
+  transition: opacity 0.15s, transform 0.1s;
+}
+button:active { transform: scale(0.97); }
+button:disabled { opacity: 0.4; cursor: default; }
+
+.btn-primary { background: var(--accent); color: #fff; }
+.btn-primary:hover:not(:disabled) { opacity: 0.85; }
+.btn-danger  { background: var(--danger); color: #fff; }
+.btn-ghost   { background: var(--surface2); color: var(--text); }
+.btn-ghost:hover:not(:disabled) { background: #2d3147; }
+
+a { color: var(--accent2); text-decoration: none; }
+a:hover { text-decoration: underline; }