build: 引入tailwindcss并迁移原有样式到原子类

1. 新增postcss、autoprefixer、tailwindcss依赖并初始化配置
2. 移除全局及页面级CSS文件，将样式替换为tailwind原子类
3. 重构API调用逻辑，拆分接口请求函数
4. 统一项目样式规范，优化布局与组件样式

src/api/media.ts

@@ -0,0 +1,25 @@
+import { api } from './client';
+import type { ApiResponse, UploadTask } from './types';
+
+export type CreateUploadTaskPayload = {
+  episodeId: number;
+  fileName: string;
+  contentType: string;
+  fileSize: number;
+};
+
+export async function createUploadTask(payload: CreateUploadTaskPayload) {
+  const response = await api.post<ApiResponse<UploadTask>>(
+    '/api/admin/v1/media/upload-tasks',
+    payload,
+  );
+  return response.data.data;
+}
+
+export async function completeUploadTask(jobId: string) {
+  await api.patch(`/api/admin/v1/media/upload-tasks/${jobId}/complete`, {});
+}
+
+export async function syncReviewStatus() {
+  await api.post('/api/admin/v1/media/review-status/sync', {});
+}