feat: add save feedback prompts, featured agent fields, dynamic Dify API config, and chat improvements

- Add success/error feedback messages near submit buttons in all admin forms
- Display success prompt for 1s before redirect after save
- Show API error details on save failure
- Add isFeatured/featuredOrder fields to Agent model and admin UI
- Add difyApiUrl/difyApiKey fields for per-agent Dify API configuration
- Show featured badge column in agent admin list
- Display featured agents on homepage sorted by order
- Refactor chat page streaming with AbortController and stable userId
- Improve Dify API proxy to use per-agent credentials

prisma/seed.ts

@@ -113,20 +113,37 @@ async function main() {
         ]),
         usageCount: 1000,
         status: "active",
+        isFeatured: true,
+        featuredOrder: 1,
+        difyApiUrl: "https://api.dify.ai/v1",
+        difyApiKey: "app-demo-key-123456",
       },
     }),
     prisma.agent.upsert({
-      where: { slug: "writing-assistant-pro" },
+      where: { slug: "huaiqi-secretary" },
       update: {},
       create: {
-        name: "写作助手 Pro",
-        slug: "writing-assistant-pro",
-        description: "营销文案、博客文章、邮件草稿，输入关键词即可生成高质量内容。",
-        icon: "✍️",
-        categoryId: categories[1].id,
-        features: "营销文案, 博客文章, 邮件草稿",
+        name: "淮企小秘书",
+        slug: "huaiqi-secretary",
+        description: "专为淮安企业打造的智能秘书，提供政策解读、企业办事指南、惠企政策查询等一站式服务，助力企业高效运营。",
+        icon: "🏢",
+        categoryId: categories[6].id,
+        features: "政策解读, 企业办事指南, 惠企政策, 智能问答",
+        hotQuestions: JSON.stringify([
+          "到淮安这边投资，项目审批快吗？",
+          "目前淮安对绿色工厂有哪些支持政策？",
+          "请问企业实施技术改造项目，淮安市有哪些支持政策?",
+          "淮安有哪些产业配套服务？",
+        ]),
+        quickQuestions: JSON.stringify([
+          "惠企政策查询",
+          "企业办事指南",
+          "政策解读",
+        ]),
         usageCount: 850,
         status: "active",
+        isFeatured: true,
+        featuredOrder: 2,
       },
     }),
     prisma.agent.upsert({
@@ -141,6 +158,8 @@ async function main() {
         features: "数据清洗, 数据可视化, 分析报告",
         usageCount: 620,
         status: "active",
+        isFeatured: true,
+        featuredOrder: 3,
       },
     }),
     prisma.agent.upsert({
@@ -185,20 +204,20 @@ async function main() {
         status: "active",
       },
     }),
-    prisma.agent.upsert({
-      where: { slug: "group-policy-ai-assistant" },
-      update: {},
-      create: {
-        name: "集团制度AI助手",
-        slug: "group-policy-ai-assistant",
-        description: "专注于集团规章制度解读与咨询，快速查询、解读各类制度文件，助力合规管理与制度落地。",
-        icon: "📋",
-        categoryId: categories[6].id,
-        features: "制度解读, 合规咨询, 文件查询, 制度培训",
-        usageCount: 50,
-        status: "active",
-      },
-    }),
+  prisma.agent.upsert({
+    where: { slug: "group-policy-ai-assistant" },
+    update: {},
+    create: {
+      name: "集团制度AI助手",
+      slug: "group-policy-ai-assistant",
+      description: "专注于集团规章制度解读与咨询，快速查询、解读各类制度文件，助力合规管理与制度落地。",
+      icon: "📋",
+      categoryId: categories[6].id,
+      features: "制度解读, 合规咨询, 文件查询, 制度培训",
+      usageCount: 50,
+      status: "active",
+    },
+  }),
   ])
   console.log("Created agents:", agents.map(a => a.name).join(", "))