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/FUNDING.yml

@@ -1,6 +1,8 @@
 # These are supported funding model platforms
+# Fork note: the upstream author's funding handles (github / buy_me_a_coffee /
+# custom donate page) were removed — they do not belong to this fork.
 
-github: MHSanaei
+github: # upstream author's handle removed in this fork
 patreon: # Replace with a single Patreon username
 open_collective: # Replace with a single Open Collective username
 ko_fi: # Replace with a single Ko-fi username
@@ -10,5 +12,5 @@ liberapay: # Replace with a single Liberapay username
 issuehunt: # Replace with a single IssueHunt username
 lfx_crowdfunding: # Replace with a single LFX Crowdfunding project-name e.g., cloud-foundry
 polar: # Replace with a single Polar username
-buy_me_a_coffee: mhsanaei
-custom: https://donate.sanaei.dev/
+buy_me_a_coffee: # upstream author's handle removed in this fork
+custom: # upstream author's donation page removed in this fork