fix/various fixes

api/tests/test_story_route_agent.py

@@ -0,0 +1,73 @@
+"""StoryRouteAgent：LLM JSON 决策与非法 target 回退。"""
+
+import unittest
+from types import SimpleNamespace
+from unittest.mock import Mock
+
+from app.agents.memoir.story_route_agent import StoryRouteAgent
+
+
+def _story_stub(sid: str, title: str = "T"):
+    return SimpleNamespace(
+        id=sid,
+        title=title,
+        canonical_markdown="预览正文",
+        chapter_links=[],
+    )
+
+
+class StoryRouteAgentTest(unittest.TestCase):
+    def test_no_llm_returns_new_story(self):
+        agent = StoryRouteAgent()
+        out = agent.decide(
+            chapter_category="childhood",
+            chapter_title="童年",
+            batch_transcript="hello",
+            candidate_stories=[_story_stub("s1")],
+            llm=None,
+            valid_story_ids={"s1"},
+        )
+        self.assertEqual(out.decision, "new_story")
+        self.assertIsNone(out.new_story_title)
+
+    def test_append_invalid_id_falls_back_to_new_story(self):
+        agent = StoryRouteAgent()
+        llm = Mock()
+        bound = Mock()
+        llm.bind.return_value = bound
+        bound.invoke.return_value = SimpleNamespace(
+            content='{"decision":"append_story","target_story_id":"unknown"}'
+        )
+        out = agent.decide(
+            chapter_category="childhood",
+            chapter_title="童年",
+            batch_transcript="hello",
+            candidate_stories=[_story_stub("s1")],
+            llm=llm,
+            valid_story_ids={"s1"},
+        )
+        self.assertEqual(out.decision, "new_story")
+        self.assertEqual(out.reason, "invalid_target")
+
+    def test_append_valid_target(self):
+        agent = StoryRouteAgent()
+        llm = Mock()
+        bound = Mock()
+        llm.bind.return_value = bound
+        bound.invoke.return_value = SimpleNamespace(
+            content='{"decision":"append_story","target_story_id":"s1"}'
+        )
+        out = agent.decide(
+            chapter_category="childhood",
+            chapter_title="童年",
+            batch_transcript="more text",
+            candidate_stories=[_story_stub("s1")],
+            llm=llm,
+            valid_story_ids={"s1"},
+        )
+        self.assertEqual(out.decision, "append_story")
+        self.assertEqual(out.target_story_id, "s1")
+
+
+if __name__ == "__main__":
+    unittest.main()