Rename SideMenu to NavMenu, fix tooltips, and update react-zen.

- Rename SideMenu to NavMenu with visible group title labels and selected item highlighting
- Update react-zen to 0.242.0 and fix responsive breakpoints (xs -> base)
- Style floating tooltips with inverted background across WorldMap, charts, and WeeklyTraffic
- Add CSS variables for primary color and use IconLabel consistently
- Remove stray console.log from LoadingPanel

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

package.json

@@ -11,7 +11,7 @@
   },
   "type": "module",
   "scripts": {
-    "dev": "next dev -p 4444 --turbo",
+    "dev": "next dev -p 3001 --turbo",
     "build": "npm-run-all check-env build-db check-db build-tracker build-geo build-app",
     "start": "next start",
     "build-docker": "npm-run-all build-db build-tracker build-geo build-app",
@@ -72,7 +72,7 @@
     "@react-spring/web": "^10.0.3",
     "@svgr/cli": "^8.1.0",
     "@tanstack/react-query": "^5.90.20",
-    "@umami/react-zen": "^0.239.0",
+    "@umami/react-zen": "^0.242.0",
     "@umami/redis-client": "^0.30.0",
     "bcryptjs": "^3.0.2",
     "chalk": "^5.6.2",