feat: 联盟返佣系统规范化并打通技能广场（无 ICP 证合规变现主路径）

- 新增 AffiliateProgram / AffiliateLink / AffiliateClick 规范化 Prisma 模型
  取代原手写裸表 affiliate_stats / affiliate_clicks
- 新增迁移 prisma/migrations/20260711000000_add_affiliate_models
- 重构 affiliate.service.ts 改用 Prisma ORM，消除 $queryRawUnsafe SQL 注入
- 重构 affiliate.controller.ts 接口：programs / links(?skillId,?toolId) / stats / click
- 前端 affiliate 页接入真实接口，移除硬编码 demo 数据
- 技能详情页新增「学此技能推荐使用的工具」联盟链接区块
- 新增 affiliate.service.spec.ts（4 用例通过）与幂等种子 seed-affiliate.ts
- 更新 docs/progress/current.md，明确无 ICP 经营许可证下以联盟返佣为合规变现主路径
- 含此前工作区未提交改动（工具 slug 路由、支付/订单、SEO 等）

Co-Authored-By: opencode <opencode@anthropic.com>

frontend/public/robots.txt

@@ -1,4 +1,92 @@
+# 宇之然 AI - robots.txt
+# https://yuzhiran.com/robots.txt
+
 User-agent: *
 Allow: /
 
+# 禁止抓取后台管理页面
+Disallow: /admin/
+Disallow: /auth/
+Disallow: /my/
+Disallow: /dashboard/
+Disallow: /notifications/
+Disallow: /enterprise/
+Disallow: /learning/
+
+# 禁止抓取 API 路径
+Disallow: /api/
+Disallow: /_next/
+
+# 允许搜索引擎抓取重要页面
+Allow: /tools/
+Allow: /courses/
+Allow: /skills/
+Allow: /practices/
+Allow: /prompts/
+Allow: /contents/
+Allow: /community/
+Allow: /discover/
+Allow: /sandbox/
+Allow: /marketplace/
+Allow: /about/
+Allow: /privacy/
+Allow: /terms/
+
+# 爬虫抓取频率限制
+Crawl-delay: 1
+
+# 搜索引擎验证
+User-agent: Googlebot
+Allow: /
+Disallow: /admin/
+Disallow: /auth/
+Disallow: /my/
+Disallow: /dashboard/
+Disallow: /notifications/
+Disallow: /enterprise/
+Disallow: /learning/
+Disallow: /api/
+Disallow: /_next/
+Crawl-delay: 0
+
+User-agent: Bingbot
+Allow: /
+Disallow: /admin/
+Disallow: /auth/
+Disallow: /my/
+Disallow: /dashboard/
+Disallow: /notifications/
+Disallow: /enterprise/
+Disallow: /learning/
+Disallow: /api/
+Disallow: /_next/
+Crawl-delay: 1
+
+User-agent: Baiduspider
+Allow: /
+Disallow: /admin/
+Disallow: /auth/
+Disallow: /my/
+Disallow: /dashboard/
+Disallow: /notifications/
+Disallow: /enterprise/
+Disallow: /learning/
+Disallow: /api/
+Disallow: /_next/
+Crawl-delay: 2
+
+User-agent: Yandex
+Allow: /
+Disallow: /admin/
+Disallow: /auth/
+Disallow: /my/
+Disallow: /dashboard/
+Disallow: /notifications/
+Disallow: /enterprise/
+Disallow: /learning/
+Disallow: /api/
+Disallow: /_next/
+Crawl-delay: 1
+
+# Sitemap 位置
 Sitemap: https://yuzhiran.com/sitemap.xml

frontend/public/site.webmanifest

@@ -0,0 +1,74 @@
+{
+  "$schema": "https://json.schemastore.org/webmanifest",
+  "name": "宇之然 AI - AI 工具与知识社区",
+  "short_name": "宇之然 AI",
+  "description": "面向大众化分领域用户的 AI 工具与知识社区，涵盖 AI 通识、提示词工程、智能体教程、模型百科、AI 沙盒实战等",
+  "start_url": "/",
+  "display": "standalone",
+  "orientation": "portrait-primary",
+  "background_color": "#ffffff",
+  "theme_color": "#0c8ee7",
+  "categories": ["education", "productivity", "utilities"],
+  "lang": "zh-CN",
+  "dir": "ltr",
+  "scope": "/",
+  "icons": [
+    {
+      "src": "/favicon.ico",
+      "sizes": "any",
+      "type": "image/x-icon"
+    },
+    {
+      "src": "/favicon.png",
+      "sizes": "16x16 32x32 48x48 64x64 128x128 256x256",
+      "type": "image/png",
+      "purpose": "any maskable"
+    },
+    {
+      "src": "/icon.svg",
+      "sizes": "any",
+      "type": "image/svg+xml",
+      "purpose": "any maskable"
+    }
+  ],
+  "shortcuts": [
+    {
+      "name": "AI 工具",
+      "short_name": "工具",
+      "description": "浏览 AI 工具指南",
+      "url": "/tools",
+      "icons": [{ "src": "/favicon.png", "sizes": "192x192" }]
+    },
+    {
+      "name": "AI 沙盒",
+      "short_name": "沙盒",
+      "description": "AI 对话沙盒实战",
+      "url": "/sandbox",
+      "icons": [{ "src": "/favicon.png", "sizes": "192x192" }]
+    },
+    {
+      "name": "课程学习",
+      "short_name": "课程",
+      "description": "AI 课程学习",
+      "url": "/courses",
+      "icons": [{ "src": "/favicon.png", "sizes": "192x192" }]
+    },
+    {
+      "name": "技能广场",
+      "short_name": "技能",
+      "description": "AI 技能广场",
+      "url": "/skills",
+      "icons": [{ "src": "/favicon.png", "sizes": "192x192" }]
+    }
+  ],
+  "share_target": {
+    "action": "/search",
+    "method": "GET",
+    "enctype": "application/x-www-form-urlencoded",
+    "params": {
+      "title": "title",
+      "text": "text",
+      "url": "url"
+    }
+  }
+}