feat: restore full-fidelity heaven rituals

heaven_agent.py

@@ -60,24 +60,12 @@ def interpret_heaven(
     except (urllib.error.URLError, TimeoutError, json.JSONDecodeError, KeyError, IndexError) as exc:
         raise HeavenAgentError(f"问天模型调用失败：{exc}") from exc
     return {
-        "answer": _limit_answer(mode, answer),
+        "answer": answer,
         "model": model,
         "latency_ms": round((time.perf_counter() - started) * 1000),
     }
 
 
-def _limit_answer(mode: str, answer: str) -> str:
-    limits = {"trend": 520, "fortune": 680, "heart": 380}
-    limit = limits[mode]
-    if len(answer) <= limit:
-        return answer
-    window = answer[:limit]
-    cut = max(window.rfind(mark) for mark in ("。", "？", "！", "\n"))
-    if cut < int(limit * 0.65):
-        cut = limit
-    return window[:cut + 1].rstrip() + "……"
-
-
 def _system_prompt(mode: str) -> str:
     common = """
 你是“小白复盘”的问天解读器。所有历法、卦象、爻位和市场指标已经由确定性程序计算，你只能解释提供的数据，不得改卦、改爻、改干支或编造行情。