refactor: unify storage config keys and refresh local dev setup

backend/tests/unit/services/base/test_supabase_service.py

@@ -159,3 +159,15 @@ def test_get_admin_client_lazily_initializes_clients(
     assert service.get_client() is anon_client
     assert service.is_initialized is True
     assert len(create_calls) == 2
+
+
+def test_validate_bucket_accepts_attachment_and_avatar() -> None:
+    service = SupabaseService(
+        settings=SupabaseSettings(public_url="https://test.supabase.co")
+    )
+
+    service._validate_bucket("agent-chat-attachments")
+    service._validate_bucket("avatars")
+
+    with pytest.raises(RuntimeError):
+        service._validate_bucket("unexpected-bucket")

backend/tests/unit/test_settings_storage_env.py

@@ -11,17 +11,21 @@ def test_social_prefixed_storage_env_populates_settings(
     monkeypatch: MonkeyPatch,
 ) -> None:
     monkeypatch.setenv("SOCIAL_STORAGE__PROVIDER", "supabase")
-    monkeypatch.setenv("SOCIAL_STORAGE__BUCKET", "agent-chat-attachments")
+    monkeypatch.setenv("SOCIAL_STORAGE__ATTACHMENT__BUCKET", "agent-chat-attachments")
+    monkeypatch.setenv("SOCIAL_STORAGE__AVATAR__BUCKET", "avatars")
     monkeypatch.setenv("SOCIAL_STORAGE__SIGNED_URL_TTL_SECONDS", "900")
-    monkeypatch.setenv("SOCIAL_STORAGE__MAX_FILE_SIZE_MB", "25")
+    monkeypatch.setenv("SOCIAL_STORAGE__ATTACHMENT__MAX_SIZE_MB", "25")
+    monkeypatch.setenv("SOCIAL_STORAGE__AVATAR__MAX_SIZE_MB", "3")
     monkeypatch.setenv("SOCIAL_STORAGE__RETENTION_DAYS", "45")
 
     settings = Settings()
 
     assert settings.storage.provider == "supabase"
-    assert settings.storage.bucket == "agent-chat-attachments"
+    assert settings.storage.attachment.bucket == "agent-chat-attachments"
+    assert settings.storage.avatar.bucket == "avatars"
     assert settings.storage.signed_url_ttl_seconds == 900
-    assert settings.storage.max_file_size_mb == 25
+    assert settings.storage.attachment.max_size_mb == 25
+    assert settings.storage.avatar.max_size_mb == 3
     assert settings.storage.retention_days == 45