Add ACMCC app source, Supabase backend, and project config

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

supabase/migrations/20260320210429_e44eca05-45d6-4169-be78-1d036da92268.sql

@@ -0,0 +1,21 @@
+
+CREATE TABLE public.custom_ledgers (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  name TEXT NOT NULL,
+  association_id UUID REFERENCES public.associations(id) ON DELETE SET NULL,
+  owner_id UUID REFERENCES public.owners(id) ON DELETE SET NULL,
+  rows JSONB DEFAULT '[]'::jsonb,
+  settings JSONB DEFAULT '{}'::jsonb,
+  created_by UUID,
+  created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+  updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+
+ALTER TABLE public.custom_ledgers ENABLE ROW LEVEL SECURITY;
+
+CREATE POLICY "Authenticated users can manage custom_ledgers"
+ON public.custom_ledgers
+FOR ALL
+TO authenticated
+USING (true)
+WITH CHECK (true);