style: 去掉全部 emoji, 状态用颜色文字表达(一致/不一致/正常/过热/需关注)

emoji 在企微客户端渲染成大色块很扎眼; 改为纯文字+<font color> 三色,
状态词直接着色, 数据保持素色, 版式标题+单行结论+引用详情不变

flows/monitor/alert_failure.py

@@ -102,11 +102,11 @@ def wecom_alert_failure(event: dict | str | None = None) -> dict:
             ended = detail.get("end_time") or detail.get("expected_start_time")
             occurred = occurred or ended
 
-        lines = [f"## 🔴 流程失败：{flow_name or resource_name or '未知'}"]
+        lines = [f"## 流程失败：{flow_name or resource_name or '未知'}"]
         if run_name:
-            lines.append(f"> Run「{run_name}」 · {event_name.split('.')[-1]} · {_fmt_ts(occurred)}")
+            lines.append(f"> Run {run_name} · {event_name.split('.')[-1]} · {_fmt_ts(occurred)}")
         if state_msg:
-            lines.append(f"> 错误：{state_msg[:150].replace(chr(10), ' ')}")
+            lines.append(f'> 错误：<font color="warning">{state_msg[:150].replace(chr(10), " ")}</font>')
         if run_id:
             lines.append(f"> [查看详情]({UI_BASE}/runs/flow-run/{run_id})")
         else: