docs: refresh GitHub About description in metadata and FAQ

.github/repository-metadata.json

@@ -1,6 +1,6 @@
 {
-  "description": "Self-hosted image hosting for your NAS / home server — Nuxt admin UI, local disk storage, server-side WebP compression, referer protection, Twikoo/EasyImage compatible.",
+  "description": "Lightweight self-hosted image hosting — Docker, multi-user, gallery & API, local disk or S3-compatible storage.",
-  "homepage": "https://github.com/O96u/PicHost#readme",
+  "homepage": "https://o96u.github.io/PicHost/",
   "topics": [
     "docker",
     "image-hosting",

docs-site/en/guide/faq.md

@@ -69,7 +69,7 @@ If you get 404, GitHub Pages may not be deployed yet: set **Settings → Pages
 
 For **main**:
 
-- **Description**: `Self-hosted image hosting — Docker, multi-user, S3/R2 storage, Twikoo/EasyImage compatible.`
+- **Description**: `Lightweight self-hosted image hosting — Docker, multi-user, gallery & API, local disk or S3-compatible storage.`
 - **Website**: `https://o96u.github.io/PicHost/` (docs, not a live demo)
 
 Do not claim the app runs on Cloudflare Pages/Workers. The **cloudflare** branch demo is [pic.roven.cc](https://pic.roven.cc).

docs-site/guide/faq.md

@@ -70,7 +70,7 @@ PicHost 双域名隔离**只对已配置的网站域、图片域做路径分流*
 
 **main** 分支建议：
 
-- **Description**：`Self-hosted image hosting — Docker, multi-user, S3/R2 storage, Twikoo/EasyImage compatible.`
+- **Description**：`Lightweight self-hosted image hosting — Docker, multi-user, gallery & API, local disk or S3-compatible storage.`
 - **Website**：`https://o96u.github.io/PicHost/`（文档站，非图床演示）
 
 勿写「部署在 Cloudflare Pages/Workers」—— PicHost 应用跑在 Docker/VPS；**cloudflare** 分支在线演示为 [pic.roven.cc](https://pic.roven.cc)。