feat(seo): implement dynamic page titles

This commit enhances SEO and user experience by setting dynamic page titles for detail pages and updating the global title configuration.

- Event, Hall of Fame, and News detail pages now use the specific item's title as the page title.
- The global `titleTemplate` and default `title` in `nuxt.config.ts` have been updated for better branding.
- These changes ensure each page has a unique, descriptive title, which is beneficial for search engine ranking and browser tab clarity.

nuxt.config.ts

@@ -19,8 +19,8 @@ export default defineNuxtConfig({
   },
   app: {
     head: {
-      titleTemplate: "%s - 永平中学校友会",
-      title: "永平中学校友会",
+      titleTemplate: "%s | 永中校友会",
+      title: "永中校友圈",
       script: [
         {
           src: "/analytics.js",