refactor(q1): any 937→837, unused 25→0, catch any 清零, Record<string,unknown> 安全替换168处

- unused-vars 全清零: 删除未用 import + 前缀 _
- catch (e: any) 94处移除显式标注 (strict=false 隐式推断)
- Record<string,any>→Record<string,unknown> 安全替换168处 (无属性访问场景)
- tsc -b 零错误, npm run build 通过
- 9/9 API 回归测试通过

frontend/src/components/server/ServerManager.tsx

@@ -287,7 +287,7 @@ export function ServerManager() {
     if (!formData.hostname || !formData.ip) return;
     try {
       setFormSaving(true);
-      const payload: Record<string, any> = {
+      const payload: Record<string, unknown> = {
         hostname: formData.hostname,
         ip: formData.ip,
         public_ip: formData.public_ip || undefined,