Fix ESLint issues across codebase

- Replace 'any' types with proper TypeScript interfaces
- Fix unescaped apostrophe in not-found page
- Convert actionTypes constant to type definition to fix unused variable
- Optimize font loading using next/font instead of external links
- Improve type safety and remove linting warnings

package.json

@@ -69,6 +69,8 @@
     "aws-cdk-lib": "^2.189.1",
     "constructs": "^10.4.2",
     "esbuild": "^0.25.5",
+    "eslint": "9.30.0",
+    "eslint-config-next": "15.3.4",
     "genkit-cli": "^1.13.0",
     "postcss": "^8",
     "tailwindcss": "^3.4.1",