Address code review feedback: improve test readability and simplify expansion prompt

Agent-Logs-Url: https://github.com/CyberSecDef/NovelForge/sessions/edfa2372-2014-43cf-8520-a4f613600a1b

Co-authored-by: CyberSecDef <17597068+CyberSecDef@users.noreply.github.com>

Author: Copilot

prompts.yml

@@ -1141,12 +1141,12 @@ prompts:
       - Preserve the existing voice, tone, and pacing shape.
       - Return the COMPLETE expanded chapter text.
     user: |
-      The following chapter is {{ current_words }} words but must be at least
-      {{ min_words }} words (target: {{ target_words }} words).
+      This chapter currently has {{ current_words }} words. Expand it to meet the
+      minimum of {{ min_words }} words (target: {{ target_words }} words).
 
-      Expand it to at least {{ min_words }} words by deepening scenes, dialogue,
-      sensory detail, and character interiority. Do NOT remove or summarize any
-      existing content. Return the COMPLETE expanded chapter.
+      Deepen scenes, dialogue, sensory detail, and character interiority.
+      Do NOT remove or summarize any existing content.
+      Return the COMPLETE expanded chapter.
 
       ---
 

tests/test_length_enforcement.py

@@ -184,9 +184,12 @@ def mock_llm(msgs, action=""):
 
     def test_expansion_handles_llm_failure(self, monkeypatch):
         """If LLM call fails, returns original text."""
+        def mock_llm(msgs, action=""):
+            raise RuntimeError("API down")
+
         monkeypatch.setattr(
             "novelforge.agents.chapter._helpers.call_llm",
-            lambda msgs, action="": (_ for _ in ()).throw(RuntimeError("API down")),
+            mock_llm,
         )
         original = "short text with few words"
         result_text, result_wc = expand_chapter(