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/app.py

@@ -275,7 +275,11 @@ async def _task_processor_loop() -> None:
     def handle_thought(task):
         from timmy.thinking import thinking_engine
         try:
-            result = thinking_engine.think_once()
+            loop = asyncio.get_event_loop()
+            future = asyncio.run_coroutine_threadsafe(
+                thinking_engine.think_once(), loop
+            )
+            result = future.result(timeout=120)
             return str(result) if result else "Thought completed"
         except Exception as e:
             logger.error("Thought processing failed: %s", e)
@@ -457,15 +461,7 @@ async def lifespan(app: FastAPI):
     # Create all background tasks without waiting for them
     briefing_task = asyncio.create_task(_briefing_scheduler())
     
-    # Register Timmy in swarm registry
-    from swarm import registry as swarm_registry
-    swarm_registry.register(
-        name="Timmy",
-        capabilities="chat,reasoning,research,planning",
-        agent_id="timmy",
-    )
-
-    # Run swarm recovery and log summary
+    # Run swarm recovery first (offlines all stale agents)
     from swarm.coordinator import coordinator as swarm_coordinator
     swarm_coordinator.initialize()
     rec = swarm_coordinator._recovery_summary
@@ -476,6 +472,14 @@ async def lifespan(app: FastAPI):
             rec["agents_offlined"],
         )
 
+    # Register Timmy AFTER recovery sweep so status sticks as "idle"
+    from swarm import registry as swarm_registry
+    swarm_registry.register(
+        name="Timmy",
+        capabilities="chat,reasoning,research,planning",
+        agent_id="timmy",
+    )
+
     # Spawn persona agents in background
     persona_task = asyncio.create_task(_spawn_persona_agents_background())