refactor: enhance theme configuration and path handling

- Update config.ts with more descriptive comments and simplified settings
- Remove about page content section
- Add new path utility functions for localization and page type detection
- Introduce SiteTitle component for mobile post page navigation
- Modify Header and Layout components to use new path utilities
- Adjust title spacing and font sizes
- Update VSCode settings with new dictionary words

src/utils/path.ts

@@ -0,0 +1,57 @@
+import themeConfig from '@/config'
+
+const defaultLocale = themeConfig.global.locale
+const moreLocales = themeConfig.global.moreLocale
+
+export function cleanPath(path: string) {
+  return path.replace(/^\/+|\/+$/g, '')
+}
+
+export function getLangFromPath(path: string) {
+  const secondaryLang = moreLocales.find(
+    lang =>
+      path.startsWith(`/${lang}/`)
+      || path === `/${lang}`
+      || path === `/${lang}/`,
+  )
+  return secondaryLang || defaultLocale
+}
+
+export function getLocalizedPath(path: string, currentLang?: string) {
+  const clean = cleanPath(path)
+  const lang = currentLang || getLangFromPath(path)
+  return lang === defaultLocale ? `/${clean}` : `/${lang}/${clean}`
+}
+
+export function isHomePage(path: string) {
+  const clean = cleanPath(path)
+  return clean === '' || moreLocales.includes(clean)
+}
+
+export function isPostPage(path: string) {
+  const clean = cleanPath(path)
+  return clean.startsWith('posts') || moreLocales.some(lang => clean.startsWith(`${lang}/posts`))
+}
+
+export function isTagPage(path: string) {
+  const clean = cleanPath(path)
+  return clean.startsWith('tags') || moreLocales.some(lang => clean.startsWith(`${lang}/tags`))
+}
+
+export function isAboutPage(path: string) {
+  const clean = cleanPath(path)
+  return clean.startsWith('about') || moreLocales.some(lang => clean.startsWith(`${lang}/about`))
+}
+
+export function getPagePath(path: string) {
+  const currentLang = getLangFromPath(path)
+
+  return {
+    currentLang,
+    isHome: isHomePage(path),
+    isPost: isPostPage(path),
+    isTag: isTagPage(path),
+    isAbout: isAboutPage(path),
+    getLocalizedPath: (targetPath: string) => getLocalizedPath(targetPath, currentLang),
+  }
+}