feat(i18n): centralize more UI texts in messages

Move hardcoded labels/strings in About, Projects, Contact form, Footer and Consent banner into next-intl message files (en/de) so content is maintained in one place.

Co-authored-by: dennis <dennis@konkol.net>

app/components/ConsentBanner.tsx

@@ -21,9 +21,11 @@ export default function ConsentBanner() {
     essential: t("essential"),
     analytics: t("analytics"),
     chat: t("chat"),
+    alwaysOn: t("alwaysOn"),
     acceptAll: t("acceptAll"),
     acceptSelected: t("acceptSelected"),
     rejectAll: t("rejectAll"),
+    hide: t("hide"),
   };
 
   if (minimized) {
@@ -56,14 +58,14 @@ export default function ConsentBanner() {
             aria-label="Minimize privacy banner"
             title="Minimize"
           >
-            Hide
+            {s.hide}
           </button>
         </div>
 
         <div className="mt-3 space-y-2">
           <div className="flex items-center justify-between gap-3">
             <div className="text-xs font-semibold text-stone-800">{s.essential}</div>
-            <div className="text-[11px] text-stone-500">Always on</div>
+            <div className="text-[11px] text-stone-500">{s.alwaysOn}</div>
           </div>
 
           <label className="flex items-center justify-between gap-3 py-1">