feat(web): add generateJoke API function

web/src/api/generate.js

@@ -0,0 +1,14 @@
+import request from './request'
+
+/**
+ * 调用 AI 生成笑话
+ * @param {string[]} keywords - 关键词列表
+ * @param {string[]} scenarios - 场景列表
+ * @returns {Promise<{title: string, content: string, created_at: string}>}
+ */
+export const generateJoke = (keywords = [], scenarios = []) => {
+  return request.post('/generate', {
+    keywords,
+    scenarios
+  })
+}