feat(about): add team member profile page

This commit introduces a new section to showcase team members, starting with the founder's profile.

- Adds a dynamic page route `/about/` to display individual member profiles.
- Creates a new `about` content collection to source profile information from Markdown files.
- Adds the first profile for 'Xiaomai', including a detailed resume and background image.
- Integrates a 'Teams' dropdown into the main navigation header.
- Implements a `copyToClipboard` utility with a toast notification for sharing profile links.

content.config.ts

@@ -50,9 +50,7 @@ const defineWebDevSchema = () =>
         label: z.string().min(1),
         icon: z.string().optional(), // 比如 "lucide:mouse-pointer-click"
         // 你原结构里通过 createService 包装，但最终是一个对象
-        plans: z
-          .array(PricingPlanPropsSchema)
-          .min(1),
+        plans: z.array(PricingPlanPropsSchema).min(1),
         // 预留扩展字段（例如：category、tags、hidden 等）
         category: z.string().optional(),
         tags: z.array(z.string()).optional(),
@@ -82,5 +80,10 @@ export default defineContentConfig({
       source: "zh-CN/webDev.yml",
       schema: defineWebDevSchema(),
     }),
+    about: defineCollection({
+      type: "page",
+      source: "about/*.md",
+      schema: z.object({}),
+    }),
   },
 });