feat: monorepo 重构 + 新增 5 个平台适配器

项目从单体结构重构为 pnpm monorepo (shared/backend/frontend)，
新增 YouTube、Instagram、Twitter/X、哔哩哔哩、微博 5 个平台适配器，
包含完整的单元测试和 E2E 测试覆盖。

- 完成 T-031~T-044: 5 个适配器实现、注册、配置和测试
- 重构前后端分离: Hono 后端 + Next.js 前端
- 151 个单元测试 + 21 个 Mock E2E + 25 个真实 E2E
- 适配器基于真实 TikHub API 响应结构实现

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/shared/package.json

@@ -0,0 +1,19 @@
+{
+  "name": "@muse/shared",
+  "version": "0.1.0",
+  "private": true,
+  "type": "module",
+  "exports": {
+    ".": "./src/index.ts"
+  },
+  "scripts": {
+    "test": "vitest run",
+    "test:watch": "vitest",
+    "test:coverage": "vitest run --coverage"
+  },
+  "devDependencies": {
+    "typescript": "^5",
+    "vitest": "^4.0.18",
+    "@vitest/coverage-v8": "^4.0.18"
+  }
+}

packages/shared/src/index.ts

@@ -0,0 +1,8 @@
+export type {
+  Platform,
+  ContentItem,
+  PlatformConfig,
+  PlatformAdapter,
+} from "./types/content";
+
+export { MVP_PLATFORMS, getPlatformConfig } from "./platforms";

packages/shared/src/platforms.test.ts

@@ -0,0 +1,60 @@
+import { describe, it, expect } from "vitest";
+import { MVP_PLATFORMS, getPlatformConfig } from "./platforms";
+
+describe("MVP_PLATFORMS", () => {
+  it("contains exactly 8 platforms", () => {
+    expect(MVP_PLATFORMS).toHaveLength(8);
+  });
+
+  it("includes all 8 platforms", () => {
+    const ids = MVP_PLATFORMS.map((p) => p.id);
+    expect(ids).toContain("douyin");
+    expect(ids).toContain("tiktok");
+    expect(ids).toContain("xiaohongshu");
+    expect(ids).toContain("youtube");
+    expect(ids).toContain("instagram");
+    expect(ids).toContain("twitter");
+    expect(ids).toContain("bilibili");
+    expect(ids).toContain("weibo");
+  });
+
+  it("all platforms are enabled by default", () => {
+    MVP_PLATFORMS.forEach((p) => {
+      expect(p.enabled).toBe(true);
+    });
+  });
+
+  it("each platform has required fields", () => {
+    MVP_PLATFORMS.forEach((p) => {
+      expect(p.id).toBeTruthy();
+      expect(p.name).toBeTruthy();
+      expect(p.icon).toBeTruthy();
+      expect(p.color).toBeTruthy();
+      expect(p.endpoints.trending).toBeTruthy();
+      expect(p.endpoints.detail).toBeTruthy();
+    });
+  });
+});
+
+describe("getPlatformConfig", () => {
+  it("returns config for known platform", () => {
+    const config = getPlatformConfig("douyin");
+    expect(config).toBeDefined();
+    expect(config!.id).toBe("douyin");
+    expect(config!.name).toBe("抖音");
+  });
+
+  it("returns undefined for unknown platform", () => {
+    expect(getPlatformConfig("unknown")).toBeUndefined();
+  });
+
+  it("returns correct config for each platform", () => {
+    expect(getPlatformConfig("tiktok")?.name).toBe("TikTok");
+    expect(getPlatformConfig("xiaohongshu")?.name).toBe("小红书");
+    expect(getPlatformConfig("youtube")?.name).toBe("YouTube");
+    expect(getPlatformConfig("instagram")?.name).toBe("Instagram");
+    expect(getPlatformConfig("twitter")?.name).toBe("Twitter/X");
+    expect(getPlatformConfig("bilibili")?.name).toBe("哔哩哔哩");
+    expect(getPlatformConfig("weibo")?.name).toBe("微博");
+  });
+});

packages/shared/src/platforms.ts

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+import type { PlatformConfig } from "./types/content";
+
+export const MVP_PLATFORMS: PlatformConfig[] = [
+  {
+    id: "douyin",
+    name: "抖音",
+    icon: "📱",
+    color: "#000000",
+    enabled: true,
+    endpoints: {
+      trending: "/api/v1/douyin/web/fetch_hot_search_result",
+      detail: "/api/v1/douyin/web/fetch_one_video",
+    },
+  },
+  {
+    id: "tiktok",
+    name: "TikTok",
+    icon: "🎵",
+    color: "#00F2EA",
+    enabled: true,
+    endpoints: {
+      trending: "/api/v1/tiktok/web/fetch_trending_post",
+      detail: "/api/v1/tiktok/web/fetch_post_detail",
+    },
+  },
+  {
+    id: "xiaohongshu",
+    name: "小红书",
+    icon: "📕",
+    color: "#FF2442",
+    enabled: true,
+    endpoints: {
+      trending: "/api/v1/xiaohongshu/app/v2/fetch_feed",
+      detail: "/api/v1/xiaohongshu/app/v2/fetch_note_detail",
+    },
+  },
+  {
+    id: "youtube",
+    name: "YouTube",
+    icon: "▶️",
+    color: "#FF0000",
+    enabled: true,
+    endpoints: {
+      trending: "/api/v1/youtube/web/get_trending_videos",
+      detail: "/api/v1/youtube/web/get_video_info",
+    },
+  },
+  {
+    id: "instagram",
+    name: "Instagram",
+    icon: "📷",
+    color: "#E4405F",
+    enabled: true,
+    endpoints: {
+      trending: "/api/v1/instagram/v1/fetch_explore_sections",
+      detail: "/api/v1/instagram/v2/fetch_post_info",
+    },
+  },
+  {
+    id: "twitter",
+    name: "Twitter/X",
+    icon: "𝕏",
+    color: "#000000",
+    enabled: true,
+    endpoints: {
+      trending: "/api/v1/twitter/web/fetch_trending",
+      detail: "/api/v1/twitter/web/fetch_tweet_detail",
+    },
+  },
+  {
+    id: "bilibili",
+    name: "哔哩哔哩",
+    icon: "📺",
+    color: "#00A1D6",
+    enabled: true,
+    endpoints: {
+      trending: "/api/v1/bilibili/web/fetch_com_popular",
+      detail: "/api/v1/bilibili/web/fetch_video_detail",
+    },
+  },
+  {
+    id: "weibo",
+    name: "微博",
+    icon: "🔥",
+    color: "#FF8200",
+    enabled: true,
+    endpoints: {
+      trending: "/api/v1/weibo/app/fetch_hot_search",
+      detail: "/api/v1/weibo/app/fetch_status_detail",
+    },
+  },
+];
+
+export function getPlatformConfig(platformId: string): PlatformConfig | undefined {
+  return MVP_PLATFORMS.find((p) => p.id === platformId);
+}

packages/shared/src/types/content.ts

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+export type Platform =
+  | "douyin"
+  | "tiktok"
+  | "xiaohongshu"
+  | "youtube"
+  | "instagram"
+  | "twitter"
+  | "bilibili"
+  | "weibo";
+
+export interface ContentItem {
+  id: string;
+  title: string;
+  cover_url?: string;
+  video_url?: string;
+  author_name: string;
+  author_avatar?: string;
+  play_count?: number;
+  like_count?: number;
+  collect_count?: number;
+  comment_count?: number;
+  share_count?: number;
+  publish_time: string;
+  platform: Platform;
+  original_url: string;
+  tags?: string[];
+}
+
+export interface PlatformConfig {
+  id: Platform;
+  name: string;
+  icon: string;
+  color: string;
+  enabled: boolean;
+  endpoints: {
+    trending: string;
+    detail: string;
+  };
+}
+
+export interface PlatformAdapter {
+  fetchTrending(count: number): Promise<ContentItem[]>;
+  fetchDetail(id: string): Promise<ContentItem>;
+}

packages/shared/tsconfig.json

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+{
+  "compilerOptions": {
+    "target": "ES2017",
+    "module": "esnext",
+    "moduleResolution": "bundler",
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "noEmit": true,
+    "isolatedModules": true,
+    "resolveJsonModule": true
+  },
+  "include": ["src/**/*.ts"]
+}

packages/shared/vitest.config.ts

@@ -0,0 +1,20 @@
+import { defineConfig } from "vitest/config";
+
+export default defineConfig({
+  test: {
+    globals: true,
+    include: ["src/**/*.test.ts"],
+    coverage: {
+      provider: "v8",
+      reporter: ["text", "text-summary", "lcov"],
+      include: ["src/**"],
+      exclude: ["src/**/*.test.*"],
+      thresholds: {
+        branches: 80,
+        functions: 80,
+        lines: 80,
+        statements: 80,
+      },
+    },
+  },
+});