fix: Docker-first test suite, UX improvements, and bug fixes (#100)

Dashboard UX:
- Restructure nav from 22 flat links to 6 core + MORE dropdown
- Add mobile nav section labels (Core, Intelligence, Agents, System, Commerce)
- Defer marked.js and dompurify.js loading, consolidate CDN to jsdelivr
- Optimize font weights (drop unused 300/500), bump style.css cache buster
- Remove duplicate HTMX load triggers from sidebar and health panels

Bug fixes:
- Fix Timmy showing OFFLINE by registering after swarm recovery sweep
- Fix ThinkingEngine await bug with asyncio.run_coroutine_threadsafe
- Fix chat auto-scroll by calling scrollChat() after history partial loads
- Add missing /voice/button page and /voice/command endpoint
- Fix Grok api_key="" treated as falsy falling through to env key
- Fix self_modify PROJECT_ROOT using settings.repo_root instead of __file__

Docker test infrastructure:
- Bind-mount hands/, docker/, Dockerfiles, and compose files into test container
- Add fontconfig + fonts-dejavu-core for creative/assembler TextClip tests
- Initialize minimal git repo in Dockerfile.test for GitSafety compatibility
- Fix introspection and path resolution tests for Docker /app context

All 1863 tests pass in Docker (0 failures, 77 skipped).

Co-authored-by: Alexander Payne <apayne@MM.local>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

src/dashboard/routes/voice.py

@@ -1,12 +1,16 @@
 """Voice routes — /voice/* and /voice/enhanced/* endpoints.
 
-Provides NLU intent detection, TTS control, and the full voice-to-action
-pipeline (detect intent → execute → optionally speak).
+Provides NLU intent detection, TTS control, the full voice-to-action
+pipeline (detect intent → execute → optionally speak), and the voice
+button UI page.
 """
 
 import logging
 
-from fastapi import APIRouter, Form
+from fastapi import APIRouter, Form, Request
+from fastapi.responses import HTMLResponse
+from fastapi.templating import Jinja2Templates
+from pathlib import Path
 
 from integrations.voice.nlu import detect_intent, extract_command
 from timmy.agent import create_timmy
@@ -14,6 +18,7 @@ from timmy.agent import create_timmy
 logger = logging.getLogger(__name__)
 
 router = APIRouter(prefix="/voice", tags=["voice"])
+templates = Jinja2Templates(directory=str(Path(__file__).parent.parent / "templates"))
 
 
 @router.post("/nlu")
@@ -56,6 +61,31 @@ async def tts_speak(text: str = Form(...)):
         return {"spoken": False, "reason": str(exc)}
 
 
+# ── Voice button page ────────────────────────────────────────────────────
+
+
+@router.get("/button", response_class=HTMLResponse)
+async def voice_button_page(request: Request):
+    """Render the voice button UI."""
+    return templates.TemplateResponse(request, "voice_button.html")
+
+
+@router.post("/command")
+async def voice_command(text: str = Form(...)):
+    """Process a voice command (used by voice_button.html).
+
+    Wraps the enhanced pipeline and returns the result in the format
+    the voice button template expects.
+    """
+    result = await process_voice_input(text=text, speak_response=False)
+    return {
+        "command": {
+            "intent": result["intent"],
+            "response": result["response"] or result.get("error", "No response"),
+        }
+    }
+
+
 # ── Enhanced voice pipeline ──────────────────────────────────────────────
 
 @router.post("/enhanced/process")