链接迁移: 前端用户可见链接与 .github 元数据改指本仓 Gitea

- 前端: 侧边栏 REPO_URL 改指本仓 Gitea; 订阅设置帮助链接改指本仓
  Gitea 上的 docs/custom-subscription-templates.md (dist 产物未动, 下次构建自愈)
- FUNDING.yml: 删除上游作者的赞助句柄 (github/buy_me_a_coffee/custom 捐赠页),
  留注释说明; ISSUE_TEMPLATE: Wiki/搜索/最新版三个 contact_links 与
  question.yaml 的 Wiki 链接改指本仓 Gitea (仓库首页/Issues/Releases)
- .github/claude/repo-context.md: 安装命令一行改指本仓 install-master.sh

.github/ISSUE_TEMPLATE/config.yml

@@ -1,11 +1,11 @@
 blank_issues_enabled: false
 contact_links:
-  - name: 📖 Project Wiki
-    url: https://github.com/MHSanaei/3x-ui/wiki
+  - name: 📖 Project home (Gitea)
+    url: https://git.881218.xyz/rogue/3x-ui-agent
     about: Setup, install, configuration, and "how do I…" guides live here. Please check before opening a question.
   - name: 🔍 Search existing issues
-    url: https://github.com/MHSanaei/3x-ui/issues?q=is%3Aissue
+    url: https://git.881218.xyz/rogue/3x-ui-agent/issues
     about: Your bug, feature, or question may already be tracked. Comment on the existing one rather than opening a duplicate.
   - name: 🚀 Latest release
-    url: https://github.com/MHSanaei/3x-ui/releases/latest
+    url: https://git.881218.xyz/rogue/3x-ui-agent/releases
     about: Reproduce on the latest version before reporting — many bugs are already fixed in the most recent release.