feat(landing): restructure footer with enamad seal, contact info, and logo

- Remove login/register/dashboard nav links from the footer
- Add Enamad trust seal on the left
- Center the contact block (title, phone, email) in the middle
- Move the logo to the right side
- Place the copyright line at the bottom, centered
- Update copyright text and add contact strings (fa/en)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/src/i18n/dictionaries/fa.ts

@@ -111,7 +111,10 @@ const fa = {
       ctaSecondary: 'داشبورد',
     },
     footer: {
-      copyright: '© ابربان — همهٔ حقوق محفوظ است',
+      copyright: 'کلیه حقوق این وبسایت متعلق به ابربان می‌باشد',
+      contactTitle: 'تماس با ما',
+      phone: '۰۲۱-۹۱۰۹۲۷۶۲',
+      email: 'info@abrban.com',
     },
   },