feat(pages): add referral page with service invitations

Add new referral page under content/page/referral/ featuring Z.ai subscription invite link with special pricing. The page is configured with appropriate menu settings and aliases for easy access.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.claude/settings.local.json

@@ -8,6 +8,7 @@
       "Bash(curl:*)",
       "Bash(sed:*)",
       "Bash(echo:*)",
+      "Bash(git commit:*)",
       "Bash(powershell:*)",
       "mcp__web-reader__webReader",
       "mcp__web-search-prime__webSearchPrime",

content/page/referral/index.md

@@ -0,0 +1,16 @@
+---
+title: Referral
+description: Danh sách lời mời services của mình
+aliases:
+  - referral
+  - invite
+menu:
+  main:
+    weight: -90
+    params:
+      icon: user
+---
+
+## [Z.ai](https://z.ai/subscribe?ic=PLKIAYEIPW)
+
+🚀 You’ve been invited to join the GLM Coding Plan! Enjoy full support for Claude Code, Cline, and 20+ top coding tools — starting at just $10/month. Subscribe now and grab the limited-time deal! Link： https://z.ai/subscribe?ic=PLKIAYEIPW