Add complete Jaryo File Manager with Synology NAS deployment support

backup/supabase/clean-storage-setup.sql

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+-- 완전 초기화 후 Storage 정책 재설정
+
+-- 1단계: 모든 기존 Storage 정책 삭제
+DROP POLICY IF EXISTS "Users can upload to own folder" ON storage.objects;
+DROP POLICY IF EXISTS "Users can view own files" ON storage.objects;
+DROP POLICY IF EXISTS "Users can update own files" ON storage.objects;
+DROP POLICY IF EXISTS "Users can delete own files" ON storage.objects;
+DROP POLICY IF EXISTS "Public upload for testing" ON storage.objects;
+DROP POLICY IF EXISTS "Public read for testing" ON storage.objects;
+
+-- 혹시 다른 이름으로 생성된 정책들도 삭제
+DROP POLICY IF EXISTS "Enable insert for authenticated users only" ON storage.objects;
+DROP POLICY IF EXISTS "Enable select for authenticated users only" ON storage.objects;
+DROP POLICY IF EXISTS "Enable update for authenticated users only" ON storage.objects;
+DROP POLICY IF EXISTS "Enable delete for authenticated users only" ON storage.objects;
+
+-- 2단계: RLS 활성화 확인 (보통 이미 활성화되어 있음)
+ALTER TABLE storage.objects ENABLE ROW LEVEL SECURITY;
+
+-- 3단계: 새 정책 생성
+-- 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]
+);
+
+-- 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]
+);
+
+-- 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]
+);
+
+-- 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]
+);
+
+-- 4단계: 정책 생성 확인
+SELECT 
+    'Storage policies created successfully!' as message,
+    COUNT(*) as policy_count
+FROM pg_policies 
+WHERE schemaname = 'storage' AND tablename = 'objects';