Add complete Jaryo File Manager with Synology NAS deployment support

backup/supabase/storage-policies.sql

@@ -0,0 +1,39 @@
+-- Storage 전용 정책 (Supabase Dashboard → Storage → Policies에서 실행)
+
+-- 1. 파일 업로드 정책
+CREATE POLICY "Users can upload to own folder"
+ON storage.objects
+FOR INSERT 
+WITH CHECK (
+    bucket_id = 'files' AND 
+    auth.uid()::text = (storage.foldername(name))[1]
+);
+
+-- 2. 파일 조회 정책
+CREATE POLICY "Users can view own files"
+ON storage.objects
+FOR SELECT 
+USING (
+    bucket_id = 'files' AND 
+    auth.uid()::text = (storage.foldername(name))[1]
+);
+
+-- 3. 파일 업데이트 정책
+CREATE POLICY "Users can update own files"
+ON storage.objects
+FOR UPDATE 
+USING (
+    bucket_id = 'files' AND 
+    auth.uid()::text = (storage.foldername(name))[1]
+);
+
+-- 4. 파일 삭제 정책
+CREATE POLICY "Users can delete own files"
+ON storage.objects
+FOR DELETE 
+USING (
+    bucket_id = 'files' AND 
+    auth.uid()::text = (storage.foldername(name))[1]
+);
+
+-- 참고: storage.foldername(name)[1]은 'user_id/filename.txt'에서 'user_id' 부분을 추출합니다.