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

src/runtime/builder.rs

@@ -107,6 +107,7 @@ impl RuntimeBuilder {
         #[cfg(target_os = "linux")]
         hid.set_bond_store(config_store.hid_bonds());
         hid.set_event_bus(events.clone()).await;
+        hid.configure_jiggler(&config.hid);
         hid.set_screen_resolution(video_resolution.width, video_resolution.height)
             .await;
         if let Err(error) = hid.init().await {

src/runtime/usb.rs

@@ -52,6 +52,8 @@ impl UsbCoordinator {
 
     pub async fn apply_config(&self, old_config: &AppConfig, new_config: &AppConfig) -> Result<()> {
         new_config.hid.validate_platform()?;
+        // Also runs for config-only updates and rollback; never forces a USB reload.
+        self.hid.configure_jiggler(&new_config.hid);
         #[cfg(unix)]
         {
             let transitioning_away_from_otg = old_config.hid.backend == HidBackend::Otg
@@ -318,6 +320,32 @@ fn hid_otg_config_changed(old: &HidConfig, new: &HidConfig) -> bool {
 mod tests {
     use super::*;
 
+    #[test]
+    fn jiggler_preferences_do_not_reload_hid_or_change_usb_descriptors() {
+        let old = AppConfig::default();
+        let mut new = old.clone();
+        new.hid.jiggler.enabled = true;
+        new.hid.jiggler.interval_secs = 120;
+        assert!(!hid_requires_reload(&old.hid, &new.hid));
+        #[cfg(unix)]
+        assert_eq!(
+            crate::otg::service::OtgDesiredState::from_config(
+                &old.hid,
+                &old.msd,
+                &old.otg_network,
+                &old.uac
+            )
+            .unwrap(),
+            crate::otg::service::OtgDesiredState::from_config(
+                &new.hid,
+                &new.msd,
+                &new.otg_network,
+                &new.uac
+            )
+            .unwrap()
+        );
+    }
+
     #[test]
     fn composite_otg_preferences_do_not_reload_ch9329_but_input_changes_do() {
         let old = HidConfig {