feat: Add wildcard support for trusted domains

Add *.cannaiq.co and *.cannabrands.app to trusted domains list.
Updated isTrustedDomain() to recognize *.domain.com as wildcard
that matches the base domain and any subdomain.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/src/middleware/trustedDomains.ts

@@ -5,8 +5,8 @@ import { Request, Response, NextFunction } from 'express';
  * These are our own frontends that should have unrestricted access.
  */
 const TRUSTED_DOMAINS = [
-  'cannaiq.co',
+  '*.cannaiq.co',
-  'www.cannaiq.co',
+  '*.cannabrands.app',
   'findagram.co',
   'www.findagram.co',
   'findadispo.com',
@@ -32,6 +32,24 @@ function extractDomain(header: string): string | null {
   }
 }
 
+/**
+ * Checks if a domain matches any trusted domain (supports *.domain.com wildcards)
+ */
+function isTrustedDomain(domain: string): boolean {
+  for (const trusted of TRUSTED_DOMAINS) {
+    if (trusted.startsWith('*.')) {
+      // Wildcard: *.example.com matches example.com and any subdomain
+      const baseDomain = trusted.slice(2);
+      if (domain === baseDomain || domain.endsWith('.' + baseDomain)) {
+        return true;
+      }
+    } else if (domain === trusted) {
+      return true;
+    }
+  }
+  return false;
+}
+
 /**
  * Checks if the request comes from a trusted domain
  */
@@ -42,7 +60,7 @@ function isRequestFromTrustedDomain(req: Request): boolean {
   // Check Origin header first (preferred for CORS requests)
   if (origin) {
     const domain = extractDomain(origin);
-    if (domain && TRUSTED_DOMAINS.includes(domain)) {
+    if (domain && isTrustedDomain(domain)) {
       return true;
     }
   }
@@ -50,7 +68,7 @@ function isRequestFromTrustedDomain(req: Request): boolean {
   // Fallback to Referer header
   if (referer) {
     const domain = extractDomain(referer);
-    if (domain && TRUSTED_DOMAINS.includes(domain)) {
+    if (domain && isTrustedDomain(domain)) {
       return true;
     }
   }