feat: Implement comprehensive entity submission architecture

src/pages/Parks.tsx

@@ -250,17 +250,8 @@ export default function Parks() {
     }
 
     try {
-      // All users submit for moderation
-      const { error } = await supabase
-        .from('content_submissions')
-        .insert({
-          user_id: user.id,
-          submission_type: 'park',
-          status: 'pending',
-          content: parkData
-        });
-
-      if (error) throw error;
+      const { submitParkCreation } = await import('@/lib/entitySubmissionHelpers');
+      await submitParkCreation(parkData, user.id);
 
       toast({
         title: "Park Submitted",