feat(小宝): 优化助手入口与预警已读

关键改动：

- 更新 README 项目说明和小宝相关入口命名

- 优化问翻小宝页面与侧边栏测试

- 小宝预警已读状态抑制同签名重复 AI 请求

Co-Authored-By: Codex GPT-5 <codex@openai.com>

apps/web/lib/xiaobao-warning-view.ts

@@ -87,6 +87,17 @@ export function isXiaobaoWarningUpdated(
   return readSignature !== currentSignature;
 }
 
+export function shouldSkipXiaobaoRiskInsightRequestForReadState(
+  risk: XiaobaoVersionRisk,
+  readStates: XiaobaoWarningReadState[],
+  userId: string | undefined,
+  readStateLoaded: boolean,
+): boolean {
+  if (!userId) return false;
+  if (!readStateLoaded) return true;
+  return !isXiaobaoWarningUpdated(risk, readStates, userId);
+}
+
 export function getXiaobaoWarningUnreadUpdateCount(
   risks: XiaobaoVersionRisk[],
   readStates: XiaobaoWarningReadState[],