feat(agent-chat): complete core workflow and strengthen auth rate limiting

backend/tests/unit/test_settings_storage_env.py

@@ -0,0 +1,34 @@
+from __future__ import annotations
+
+from pydantic import ValidationError
+import pytest
+from pytest import MonkeyPatch
+
+from core.config.settings import Settings
+
+
+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__SIGNED_URL_TTL_SECONDS", "900")
+    monkeypatch.setenv("SOCIAL_STORAGE__MAX_FILE_SIZE_MB", "25")
+    monkeypatch.setenv("SOCIAL_STORAGE__RETENTION_DAYS", "45")
+
+    settings = Settings()
+
+    assert settings.storage.provider == "supabase"
+    assert settings.storage.bucket == "agent-chat-attachments"
+    assert settings.storage.signed_url_ttl_seconds == 900
+    assert settings.storage.max_file_size_mb == 25
+    assert settings.storage.retention_days == 45
+
+
+def test_storage_settings_validation_rejects_invalid_provider(
+    monkeypatch: MonkeyPatch,
+) -> None:
+    monkeypatch.setenv("SOCIAL_STORAGE__PROVIDER", "s3")
+
+    with pytest.raises(ValidationError):
+        Settings()