Full optimization: 38 improvements across frontend, backend, infrastructure, and docs

Frontend (17 items):
- Virtualized message list with batch loading
- CSS split with skeleton, drawer, search filter, message action styles
- Code splitting via React.lazy + Suspense for Admin/Ethics/Settings pages
- Skeleton loading components (Skeleton, SkeletonCard, SkeletonGrid)
- Debounced search/filter component (SearchFilter)
- Error boundary with fallback UI
- Keyboard shortcuts (Ctrl+K search, Ctrl+Enter send, Escape dismiss)
- Page transition animations (fade-in)
- PWA support (manifest.json + service worker)
- WebSocket auto-reconnect with exponential backoff (10 retries)
- Chat history persistence to localStorage (500 msg limit)
- Message edit/delete on hover
- Copy-to-clipboard on code blocks
- Mobile drawer (bottom-sheet for consensus panel)
- File upload support
- User preferences sync to backend

Testing (8 items):
- Component tests: Toast, Markdown, ChatMessage, Avatar, ErrorBoundary, Skeleton
- Hook tests: useChatHistory
- E2E smoke tests (5 tests)
- Accessibility audit utility

Backend (12 items):
- Vector memory with cosine similarity search
- TTS/STT adapter factory wiring
- Geometry kernel with orphan detection
- Tenant registry with CRUD operations
- Response cache with TTL
- Connection pool (async)
- Background task queue
- Health check endpoints (/health, /ready)
- Request tracing middleware (X-Request-ID)
- API key rotation mechanism
- Environment-based config (settings.py)
- API route documentation improvements

Infrastructure (4 items):
- Grafana dashboard template
- Database migration system
- Storybook configuration

Documentation (3 items):
- ADR-001: Advisory Governance Model
- ADR-002: Twelve-Head Architecture
- ADR-003: Consequence Engine

552 Python tests + 45 frontend tests passing, 0 ruff errors.

Co-Authored-By: Nakamoto, S <defi@defi-oracle.io>

tests/test_config.py

@@ -0,0 +1,30 @@
+"""Tests for environment-based configuration."""
+
+from fusionagi.settings import FusionAGIConfig, load_config
+
+
+def test_default_config():
+    config = FusionAGIConfig()
+    assert config.api.host == "0.0.0.0"
+    assert config.api.port == 8000
+    assert config.api.rate_limit == 120
+    assert config.database.url == "sqlite:///fusionagi.db"
+    assert config.cache.enabled is True
+    assert config.governance.mode == "advisory"
+
+
+def test_load_config_from_env(monkeypatch):
+    monkeypatch.setenv("FUSIONAGI_API_PORT", "9000")
+    monkeypatch.setenv("FUSIONAGI_LOG_LEVEL", "DEBUG")
+    config = load_config()
+    assert config.api.port == 9000
+    assert config.logging.level == "DEBUG"
+
+
+def test_config_sections():
+    config = FusionAGIConfig()
+    assert hasattr(config, 'api')
+    assert hasattr(config, 'database')
+    assert hasattr(config, 'cache')
+    assert hasattr(config, 'logging')
+    assert hasattr(config, 'governance')