Add ACMCC app source, Supabase backend, and project config

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

supabase/migrations/20260428030249_80de6495-03ce-49ca-840f-efffe42bbeb1.sql

@@ -0,0 +1,19 @@
+CREATE POLICY "Board members can insert invoices for their associations"
+ON public.invoices FOR INSERT TO authenticated
+WITH CHECK (
+  EXISTS (
+    SELECT 1 FROM public.board_members bm
+    WHERE bm.user_id = auth.uid()
+      AND bm.association_id = invoices.association_id
+  )
+);
+
+CREATE POLICY "Board members can insert bills for their associations"
+ON public.bills FOR INSERT TO authenticated
+WITH CHECK (
+  EXISTS (
+    SELECT 1 FROM public.board_members bm
+    WHERE bm.user_id = auth.uid()
+      AND bm.association_id = bills.association_id
+  )
+);