Add theme system, project banners, mobile nav, and hero logo

- System-first theming via light-dark() with explicit .light/.dark overrides
- Project banners: Racetix, beenvoice, RaceHub, HRIStudio
- Mobile navigation with portaled blur backdrop
- Hero logo placement and page copy polish
- Remove tRPC, migrate contact flow to direct API route

package.json

@@ -17,17 +17,11 @@
   },
   "dependencies": {
     "@t3-oss/env-nextjs": "^0.12.0",
-    "@tanstack/react-query": "^5.69.0",
-    "@trpc/client": "^11.0.0",
-    "@trpc/react-query": "^11.0.0",
-    "@trpc/server": "^11.0.0",
     "next": "^16.2.10",
     "nodemailer": "^9.0.3",
     "react": "^19.2.7",
     "react-dom": "^19.2.7",
     "server-only": "^0.0.1",
-    "superjson": "^2.2.1",
-    "trpc": "^0.11.3",
     "zod": "^3.24.2"
   },
   "devDependencies": {