feat(footer): CMS-editable company address (common.json footer.address)

'Budapest, Magyarország' lived hardcoded in site.ts. It now lives in
common.json (footer.address), editable via the Közös szövegek tab, and both
consumers (Footer, Kapcsolat page) read it from there — single source.
Schema and types extended; site.ts keeps only the email.

Closes MITHOME-73

proto/src/app/kapcsolat/page.tsx

@@ -274,7 +274,7 @@ export default function ContactPage() {
                   <div>
                     <h3 className="font-semibold text-gray-900 mb-1">{pageContent.info.company.title}</h3>
                     <p className="text-gray-700">{siteConfig.general.name}</p>
-                    <p className="text-sm text-gray-600">{siteConfig.contact.address}</p>
+                    <p className="text-sm text-gray-600">{content.common.footer.address}</p>
                   </div>
                 </div>
 

proto/src/components/Footer.tsx

@@ -57,7 +57,7 @@ export default function Footer() {
                 >
                   🏢
                 </span>
-                <span>{siteConfig.contact.address}</span>
+                <span>{content.common.footer.address}</span>
               </div>
             </div>
           </div>

proto/src/config/site.ts

@@ -41,7 +41,7 @@ export const siteConfig: SiteConfig = {
 
   contact: {
     email: process.env.NEXT_PUBLIC_CONTACT_EMAIL || 'info@mozdit.hu',
-    address: 'Budapest, Magyarország',
+    // address lives in content/common.json (footer.address) — CMS-editable
     form: {
       title: 'Kapcsolatfelvétel',
       description: 'Legyen szíves érdeklődését vagy problémáját részletesen megfogalmazni.',

proto/src/content/common.json

@@ -18,6 +18,7 @@
     "banner": "⚠ STAGING / TESZTKÖRNYEZET — A STAGING OLDALT LÁTOD"
   },
   "footer": {
-    "copyright": "© 2002–{year} mozdIT Bt. Minden jog fenntartva."
+    "copyright": "© 2002–{year} mozdIT Bt. Minden jog fenntartva.",
+    "address": "Budapest, Magyarország"
   }
 }

proto/src/content/schema.js

@@ -15,7 +15,7 @@ const schemas = {
     labels: object({ required: string, features: string }),
     validation: object({ required: string, invalidEmail: string, minLength: string }),
     staging: object({ banner: string }),
-    footer: object({ copyright: string }),
+    footer: object({ copyright: string, address: string }),
   }),
   home: object({
     hero: object({ title: string, subtitle: string, description: string, trustBullets: array(string), cta: object({ primary: ctaLink, secondary: ctaLink }) }),

proto/src/content/types.ts

@@ -195,6 +195,7 @@ export interface CommonContent {
   }
   footer: {
     copyright: string
+    address: string
   }
 }