supabase/migrations/20260124100000_allow_profile_lookup_for_sharing.sql

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+-- Migration: Allow authenticated users to look up profiles for sharing
+-- Problem: The profiles RLS policies only allow users to see their own profile
+-- (or admins to see all). This prevents the sharing feature from finding
+-- users by email since the query is blocked by RLS.
+-- Solution: Add a SELECT policy allowing any authenticated user to view profiles.
+
+CREATE POLICY "Authenticated users can view profiles"
+  ON profiles
+  FOR SELECT
+  USING (auth.uid() IS NOT NULL);