fixed profile preferences

supabase/migrations/20260524140000_profiles_focus_topics_text.sql

@@ -0,0 +1,21 @@
+-- Store profile preferences as JSON text instead of text[].
+-- Safe when the column is already text (no-op cast).
+
+alter table public.profiles
+  alter column focus_topics drop default;
+
+alter table public.profiles
+  alter column focus_topics type text using (
+    case
+      when focus_topics is null then null
+      when pg_typeof(focus_topics)::text = 'text[]' then
+        case
+          when coalesce(array_length(focus_topics::text[], 1), 0) = 0 then null
+          else (focus_topics::text[])[1]
+        end
+      else focus_topics::text
+    end
+  );
+
+alter table public.profiles
+  alter column focus_topics set default null;