feat(hid): 支持控制台鼠标抖动

在控制台鼠键配置菜单增加鼠标抖动开关和间隔设置，默认关闭，间隔支持 10–3600 秒。
设备端按键鼠空闲时间调度，支持配置持久化、热更新、真实输入打断和断连后重新计时。
兼容绝对及相对鼠标模式，按键或按钮按住期间暂停抖动。

验证：608 项 Rust 单测通过；暂存快照前端构建和浏览器交互测试通过；已完成 ARMv7 OpenWrt 部署验证。

Refs #316

web/src/i18n/en-US.ts

@@ -278,6 +278,12 @@ export default {
     positioningMode: 'Positioning Mode',
     sendInterval: 'Send Interval',
     showCursor: 'Show Cursor',
+    mouseJiggler: 'Mouse jiggler',
+    mouseJigglerHelp: 'Gently moves the mouse while idle to help prevent the target from sleeping or turning off its display. Pauses during input or while keys or buttons are held. Keeps working after closing this page and remembers settings after restart.',
+    jigglerInterval: 'Jiggle interval',
+    jigglerSeconds: 'sec',
+    jigglerIntervalInvalid: 'Enter a whole number between 10 and 3600 seconds.',
+    jigglerNoMouse: 'Enable a mouse interface in HID device settings first.',
     backend: 'Backend',
     devicePath: 'Device Path',
     baudrate: 'Baudrate',