Set up Supabase Storage bucket for Ethos tracks

cgen-2cbf75c2ebe24d57bce3f72f3f311a9c

supabase/migrations/20250210_setup_ethos_storage.sql

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+-- Create storage bucket for Ethos tracks if it doesn't exist
+-- Note: This SQL migration cannot create buckets directly via SQL
+-- The bucket must be created via the Supabase Dashboard or API:
+-- 
+-- 1. Go to Supabase Dashboard > Storage
+-- 2. Click "New bucket"
+-- 3. Name: "ethos-tracks"
+-- 4. Make it PUBLIC
+-- 5. Set up these RLS policies (see below)
+
+-- After bucket is created, apply these RLS policies in SQL:
+
+-- Enable RLS on storage objects
+create policy "Allow authenticated users to upload tracks"
+on storage.objects
+for insert
+to authenticated
+with check (
+  bucket_id = 'ethos-tracks'
+  and (storage.foldername(name))[1] = auth.uid()::text
+);
+
+create policy "Allow public read access to ethos tracks"
+on storage.objects
+for select
+to public
+using (bucket_id = 'ethos-tracks');
+
+create policy "Allow users to delete their own tracks"
+on storage.objects
+for delete
+to authenticated
+using (
+  bucket_id = 'ethos-tracks'
+  and (storage.foldername(name))[1] = auth.uid()::text
+);
+
+-- Create index for better performance
+create index if not exists idx_storage_bucket_name on storage.objects(bucket_id);
+create index if not exists idx_storage_name on storage.objects(name);
+
+-- Comments for documentation
+comment on policy "Allow authenticated users to upload tracks" on storage.objects 
+  is 'Authenticated users can upload audio files to their own folder in ethos-tracks bucket';
+
+comment on policy "Allow public read access to ethos tracks" on storage.objects 
+  is 'Public can read all files in ethos-tracks bucket for streaming';
+
+comment on policy "Allow users to delete their own tracks" on storage.objects 
+  is 'Users can delete their own uploaded tracks';