Chore: 更新框架到 React Router 7

修复迁移到 Tailwind 4 之后的样式差异
修复 404 页面的异常并调整样式
优化分页器组件的无障碍化，Span 标签替换成 Button

app/routes.ts

@@ -0,0 +1,16 @@
+import {
+  type RouteConfig,
+  index,
+  layout,
+  route,
+} from "@react-router/dev/routes";
+
+export default [
+  layout("routes/app-layout.tsx", [
+    index("routes/index.tsx"),
+    route("note", "routes/note.tsx"),
+    route("note/:year/:id", "routes/note-detail.tsx"),
+    route("gallery/*", "routes/gallery.tsx"),
+    route("*", "routes/page.tsx"),
+  ]),
+] satisfies RouteConfig;