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

.vscode/settings.json

@@ -62,13 +62,24 @@
     "antfu",
     "astrojs",
     "attributify",
+    "bmoji",
+    "gtag",
     "katex",
+    "Lightbox",
     "mdast",
+    "msrc",
+    "msvalidate",
     "overlayscrollbars",
     "partytown",
     "photoswipe",
+    "pswp",
+    "radishzz",
     "rehype",
+    "Retypeset",
+    "Umami",
     "unocss",
-    "vite"
+    "vite",
+    "waline",
+    "weibo"
   ]
 }