Bundle frontend with esbuild, serve fonts offline, fix dashboard

- Add esbuild bundling: JS (IIFE, minified, sourcemapped) and CSS into
  single dist/ files, replacing 15+ individual CSS links and CDN scripts
- Bundle Chart.js and ELK.js from npm instead of CDN (fully offline)
- Serve DM Sans and Orbitron fonts locally from static/fonts/
- Fix dashboard automation card stretching full width (max-width: 500px)
- Fix time_of_day condition not localized in automation cards
- Add Chrome browser tools context file for MCP testing workflow
- Update frontend context with bundling docs and Chrome tools reference

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

server/src/wled_controller/static/css/dashboard.css

@@ -306,6 +306,10 @@
     flex-shrink: 0;
 }
 
+.dashboard-automation {
+    max-width: 500px;
+}
+
 .dashboard-automation .dashboard-target-metrics {
     min-width: 48px;
 }