feat: enhance SEO and mobile app meta properties

Improves SEO optimization and mobile app integration by:
- Adding ogSiteName meta property for better social sharing
- Including apple-touch-icon for iOS device support
- Updating documentation for Worker deployment configuration
- Clarifying preview mode duration (5 minutes) in documentation

app/app.vue

@@ -1,10 +1,12 @@
 <script setup>
 const { title, description, image } = useAppConfig()
+
 useSeoMeta({
   title: `${title} - ${description}`,
   description,
   ogType: 'website',
   ogTitle: title,
+  ogSiteName: title,
   ogDescription: description,
   ogImage: image,
   twitterTitle: title,
@@ -30,6 +32,10 @@ useHead({
       type: 'image/png',
       href: '/icon-192.png',
     },
+    {
+      rel: 'apple-touch-icon',
+      href: '/apple-touch-icon.png',
+    },
   ],
 })
 </script>

docs/configuration.md

@@ -2,12 +2,18 @@
 
 Sink provides some configuration options, which can be referred to in [.env.example](../.env.example).
 
+> When using Worker deployment, please note that variables with the `NUXT_PUBLIC_` prefix need to be configured in Workers' **Settings** -> **Build** -> **Variables and Secrets** and **Settings** -> **Variables and Secrets**.
+
 ## `NUXT_PUBLIC_PREVIEW_MODE`
 
-Sets the site to demo mode, the generated links will expire after 24 hours, and the links cannot be edited or deleted.
+> If you are using Worker deployment, this variable needs to be configured in  **Settings** -> **Build** -> **Variables and Secrets** and **Settings** -> **Variables and Secrets**.
+
+Sets the site to demo mode, the generated links will expire after 5 minutes, and the links cannot be edited or deleted.
 
 ## `NUXT_PUBLIC_SLUG_DEFAULT_LENGTH`
 
+> If you are using Worker deployment, this variable needs to be configured in  **Settings** -> **Build** -> **Variables and Secrets** and **Settings** -> **Variables and Secrets**.
+
 Sets the default length of the generated SLUG.
 
 ## `NUXT_REDIRECT_STATUS_CODE`