Add ACMCC app source, Supabase backend, and project config

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

supabase/migrations/20260425000306_0fbeec66-61cd-4790-a661-ec789157bc08.sql

@@ -0,0 +1,42 @@
+-- 1. Add accounting_system column
+ALTER TABLE public.chart_of_accounts
+  ADD COLUMN IF NOT EXISTS accounting_system text NOT NULL DEFAULT 'buildium';
+
+-- 2. Constrain values
+ALTER TABLE public.chart_of_accounts
+  DROP CONSTRAINT IF EXISTS chart_of_accounts_accounting_system_check;
+ALTER TABLE public.chart_of_accounts
+  ADD CONSTRAINT chart_of_accounts_accounting_system_check
+  CHECK (accounting_system IN ('buildium', 'zoho'));
+
+-- 3. Tag all existing rows as buildium (already default, but explicit)
+UPDATE public.chart_of_accounts
+  SET accounting_system = 'buildium'
+  WHERE accounting_system IS NULL OR accounting_system = '';
+
+-- 4. Index for filtering
+CREATE INDEX IF NOT EXISTS idx_chart_of_accounts_system
+  ON public.chart_of_accounts(accounting_system, account_number);
+
+-- 5. Helper: infer accounting system for an association
+CREATE OR REPLACE FUNCTION public.get_association_accounting_system(_association_id uuid)
+RETURNS text
+LANGUAGE sql
+STABLE SECURITY DEFINER
+SET search_path TO 'public'
+AS $$
+  SELECT CASE
+    WHEN _association_id IS NULL THEN 'buildium'
+    WHEN EXISTS (
+      SELECT 1 FROM public.associations a
+      WHERE a.id = _association_id
+        AND a.zoho_organization_id IS NOT NULL
+        AND a.zoho_organization_id <> ''
+    ) THEN 'zoho'
+    WHEN EXISTS (
+      SELECT 1 FROM public.buildium_gl_mappings bgm
+      WHERE bgm.association_id = _association_id
+    ) THEN 'buildium'
+    ELSE 'buildium'
+  END;
+$$;