chore(repo): 完善仓库维护与自动化 (#108)

统一 Node.js 24 LTS、CI、文档和发布工作流配置。

完善仓库维护规范、Dependabot 与贡献文档，清理生成产物并统一既有 Go 代码格式。

docs-site/docs/development/setup.md

@@ -6,7 +6,7 @@ description: Get a BackupX dev environment running — backend, frontend, tests.
 
 # Development Setup
 
-**Requirements:** Go ≥ 1.25, Node.js ≥ 20, npm.
+**Requirements:** Go ≥ 1.25, Node.js 24 LTS, npm 11 or later.
 
 ## Clone & install
 

docs-site/docs/getting-started/installation.md

@@ -51,7 +51,7 @@ The installer:
 
 ## From source
 
-Requires Go ≥ 1.25 and Node.js ≥ 20.
+Requires Go ≥ 1.25, Node.js 24 LTS, and npm 11 or later.
 
 ```bash
 git clone https://github.com/Awuqing/BackupX.git && cd BackupX