refactor: move source tree into work/, multi-stage Docker build, fix satpass

- Move all application source (meshai/, dashboard-frontend/, tests/,
  config/, docs/, Dockerfile, etc.) into work/ directory
- Add Node.js multi-stage build to Dockerfile for frontend compilation;
  remove compiled static assets from git tracking
- Fix satpass missing time windows: consolidation was splitting wire on
  newline and only putting line 1 in event.title, dropping the time
  window line that the composer uses for precomposed broadcasts
- Fix satpass burst flooding: stagger consolidation timers (+60s per
  pending pass) so Central batch publishes don't blast the mesh
- Update CI workflow build context to work/
- Anchor lib/ and data/ gitignore patterns to repo root to prevent
  false matches on nested directories
- Add dashboard-frontend/node_modules/ to .dockerignore

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

work/dashboard-frontend/package.json

@@ -0,0 +1,35 @@
+{
+  "name": "meshai-dashboard",
+  "private": true,
+  "version": "0.1.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc && vite build",
+    "preview": "vite preview"
+  },
+  "dependencies": {
+    "@types/d3": "^7.4.3",
+    "@types/leaflet": "^1.9.21",
+    "d3": "^7.9.0",
+    "echarts": "^6.0.0",
+    "echarts-for-react": "^3.0.6",
+    "leaflet": "^1.9.4",
+    "lucide-react": "^0.383.0",
+    "react": "^18.3.0",
+    "react-dom": "^18.3.0",
+    "react-leaflet": "^4.2.1",
+    "react-router-dom": "^6.23.0",
+    "recharts": "^2.12.0"
+  },
+  "devDependencies": {
+    "@types/react": "^18.3.0",
+    "@types/react-dom": "^18.3.0",
+    "@vitejs/plugin-react": "^4.3.0",
+    "autoprefixer": "^10.4.0",
+    "postcss": "^8.4.0",
+    "tailwindcss": "^3.4.0",
+    "typescript": "^5.4.0",
+    "vite": "^5.4.0"
+  }
+}