feat(agent): complete closed-loop runtime and pricing fallback

backend/tests/unit/test_settings_llm_env.py

@@ -0,0 +1,20 @@
+from __future__ import annotations
+
+from pytest import MonkeyPatch
+
+from core.config.settings import Settings
+
+
+def test_social_prefixed_llm_provider_keys_populates_settings(
+    monkeypatch: MonkeyPatch,
+) -> None:
+    monkeypatch.setenv("SOCIAL_LLM__PROVIDER_KEYS__DASHSCOPE", "dash-key")
+    monkeypatch.setenv("SOCIAL_LLM__PROVIDER_KEYS__DEEPSEEK", "deep-key")
+    monkeypatch.setenv("SOCIAL_LLM__PROVIDER_KEYS__ARK", "ark-key")
+
+    settings = Settings()
+
+    keys = {key.lower(): value for key, value in settings.llm.provider_keys.items()}
+    assert keys["dashscope"] == "dash-key"
+    assert keys["deepseek"] == "deep-key"
+    assert keys["ark"] == "ark-key"