feat: add hot inspiration flow API methods

Add 3 API methods following existing patterns:
- getHotInspirationFlowBatchApi() for batch fetching 4 categories
- getHotInspirationFlowApi(type) for single category refresh
- getHotInspirationFlowMoreApi(type, cursor, limit) for pagination

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

frontend/utils/api.js

@@ -881,3 +881,31 @@ export function getEarningsSummaryApi() {
 		method: 'GET'
 	})
 }
+
+// ==================== 热门灵感瀑布相关接口 ====================
+
+// 批量获取热门分类（页面初始化用）
+export function getHotInspirationFlowBatchApi() {
+	return request({
+		url: '/api/v1/inspiration-flow/hot/batch',
+		method: 'GET'
+	})
+}
+
+// 单个分类刷新
+export function getHotInspirationFlowApi(type) {
+	return request({
+		url: '/api/v1/inspiration-flow/hot',
+		method: 'GET',
+		data: { type }
+	})
+}
+
+// 查看更多分页
+export function getHotInspirationFlowMoreApi(type, cursor = '', limit = 20) {
+	return request({
+		url: '/api/v1/inspiration-flow/hot/more',
+		method: 'GET',
+		data: { type, cursor, limit }
+	})
+}