Add AI chat with skills management and model provider settings

- Model providers for OpenAI and Anthropic message formats (e.g. via
  Sub2API), with API keys encrypted at rest and never returned
- Skills tree with markdown editing, priorities, drafts, publishing and
  rollback; only published skills enter the chat prompt
- Chat page with tool calls over collected news and Binance USD-M
  klines, a persisted CONTEXT.md, reset, and stop-generation support
- Chat may only create skill drafts and update CONTEXT.md; publishing,
  deleting, moving and priority changes stay with the user

web/src/router/index.ts

@@ -5,7 +5,10 @@ import { useUserStore } from "@/pinia/user"
 export const menuRoutes = [
   { path: "/news", name: "news", component: () => import("@/pages/news/index.vue"), meta: { title: "新闻流" } },
   { path: "/crawler", name: "crawler", component: () => import("@/pages/crawler/index.vue"), meta: { title: "采集控制台" } },
-  { path: "/market", name: "market", component: () => import("@/pages/market/index.vue"), meta: { title: "行情" } }
+  { path: "/market", name: "market", component: () => import("@/pages/market/index.vue"), meta: { title: "行情" } },
+  { path: "/chat", name: "chat", component: () => import("@/pages/chat/index.vue"), meta: { title: "Chat" } },
+  { path: "/skills", name: "skills", component: () => import("@/pages/skills/index.vue"), meta: { title: "Skills" } },
+  { path: "/settings", name: "settings", component: () => import("@/pages/settings/index.vue"), meta: { title: "环境变量" } }
 ]
 
 export const router = createRouter({