Add audience views: gay men, lesbian, trans with smart cross-visibility and entry picker

supabase/migration_v4_audience.sql

@@ -0,0 +1,7 @@
+-- Profile community + seeking for audience map filtering
+ALTER TABLE public.profiles
+  ADD COLUMN IF NOT EXISTS orientation TEXT,
+  ADD COLUMN IF NOT EXISTS community TEXT
+    CHECK (community IS NULL OR community IN ('gay-men', 'lesbian', 'trans', 'nonbinary', 'bi', 'queer')),
+  ADD COLUMN IF NOT EXISTS seeking TEXT
+    CHECK (seeking IS NULL OR seeking IN ('men', 'women', 'everyone'));