chore(quality): type-check and lint gates in pre-deploy, clean lint/tsc

- pre-deploy suite now runs tsc --noEmit and eslint; any failure aborts
  the release
- fix all TypeScript errors (FooterConfig.copyright removed after the CMS
  move; test guards/casts)
- fix all ESLint errors: <a>→<Link> and <img>→<Image> in Header/Footer,
  remove unused imports and explicit any in src
- eslint config relaxes no-explicit-any/no-require-imports/no-unused-vars
  for test and CommonJS config files (legitimate usage)

Closes MITHOME-81

proto/src/app/page.tsx

@@ -1,4 +1,3 @@
-import { siteConfig } from '@/config/site'
 import { content } from '@/content'
 
 const { home: pageContent } = content.pages
@@ -94,7 +93,7 @@ export default function Home() {
             </h2>
           </div>
           <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-4 gap-6 stagger-children">
-            {pageContent.about.usps.map((usp: any, index: number) => (
+            {pageContent.about.usps.map((usp, index) => (
               <div 
                 key={usp.id} 
                 className="group text-center p-6 rounded-xl transition-all duration-300 hover-lift animate-fade-in-up"