Refine profile privacy controls

supabase/migrations/20250929024400_2d8eb180-391f-4fd6-81f2-531b8d3d1d8c.sql

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+-- Drop the problematic view that's causing security issues
+DROP VIEW IF EXISTS public.public_profiles;
+
+-- Instead, let's create a simpler and safer approach using just RLS policies
+-- The view was too complex and triggered security warnings
+
+-- Remove the overly permissive policy I created earlier
+DROP POLICY IF EXISTS "Allow viewing basic profile info" ON public.profiles;
+
+-- Create more specific, safer RLS policies for different use cases
+
+-- Policy for users to view their own complete profile
+CREATE POLICY "Users can view their own complete profile"
+ON public.profiles
+FOR SELECT
+USING (auth.uid() = user_id);
+
+-- Policy for moderators/admins to view all profiles
+CREATE POLICY "Moderators can view all profiles"
+ON public.profiles
+FOR SELECT
+USING (is_moderator(auth.uid()));
+
+-- Policy for public access to profiles - but ONLY basic safe fields are accessible via application logic
+-- This policy allows the row to be returned, but sensitive fields should be filtered out by application code
+CREATE POLICY "Public access to non-private profiles with field restrictions"
+ON public.profiles
+FOR SELECT  
+USING (
+  privacy_level = 'public' 
+  AND NOT banned
+);
+
+-- The security will be enforced in the application layer using our can_view_profile_field function
+-- This approach is safer than trying to restrict field access in RLS policies