Referral page, bug fixes, seed data, persona tiers

- New /refer page with share/copy/stats
- Fixed modal z-index conflicts (z-50 → z-[60]) across forum, groups, souq, halal-monitor
- Seed route: forum categories, marketplace listings, private groups
- Mufti/Daie personas now available in Premium tier
- Fixed referral share link: falahos.my/mobile/auth?ref=CODE
- Fixed client-side persona access check for premium

src/app/api/auth/[provider]/callback/route.ts

@@ -88,7 +88,11 @@ async function handleCallback(
     });
 
     // Build the redirect URI (must match the one used in the authorization request)
-    const baseUrl = `${url.protocol}//${url.host}`;
+    const forwardedProto = req.headers.get("x-forwarded-proto") || "https";
+    const rawHost = req.headers.get("host") || "";
+    const isDockerHost = /^[a-f0-9]{12,}$/i.test(rawHost.split(":")[0]);
+    const forwardedHost = req.headers.get("x-forwarded-host") || (isDockerHost ? "falahos.my" : rawHost);
+    const baseUrl = `${forwardedProto}://${forwardedHost}`;
     const redirectUri = `${baseUrl}/mobile/api/auth/${provider}/callback`;
 
     // Exchange code for user info