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/components/Footer.tsx

@@ -2,6 +2,7 @@
 
 import { siteConfig } from '@/config/site'
 import { content } from '@/content'
+import Link from 'next/link'
 
 export default function Footer() {
   return (
@@ -16,7 +17,7 @@ export default function Footer() {
         <div className="grid grid-cols-1 md:grid-cols-4 gap-8 lg:gap-12">
           {/* Company Info */}
           <div className="md:col-span-2">
-            <a 
+            <Link 
               href="/" 
               className="inline-flex items-center gap-2 text-xl font-bold mb-4 transition-colors duration-200"
               style={{ color: 'var(--color-primary-600)' }}
@@ -26,7 +27,7 @@ export default function Footer() {
                 className="inline-block w-2 h-2 rounded-full animate-pulse-slow"
                 style={{ background: 'var(--color-success-500)' }}
               />
-            </a>
+            </Link>
             <p 
               className="mb-6 max-w-md leading-relaxed"
               style={{ color: 'var(--color-foreground-muted)' }}
@@ -104,7 +105,7 @@ export default function Footer() {
               Szolgáltatások
             </h3>
             <ul className="space-y-3">
-              {content.pages.home.services.items.map((service: any) => (
+              {content.pages.home.services.items.map((service) => (
                 <li 
                   key={service.id} 
                   className="flex items-center gap-2 text-sm"