优化，贴图

src/lib/constants.ts

@@ -9,6 +9,7 @@ export const WINDOWS = {
   main: 'main',
   osdOverlay: 'osd-overlay',
   screenshotOverlay: 'screenshot-overlay',
+  screenshotPin: 'screenshot-pin',
 } as const
 
 /** Tauri 事件名（前端 emit / listen 与 Rust constants::events 对应） */
@@ -31,6 +32,9 @@ export const EVENTS = {
   screenshotBegin: 'screenshot-begin',
   screenshotOverlayReady: 'screenshot-overlay-ready',
   screenshotShortcut: 'screenshot-shortcut',
+  screenshotPinShortcut: 'screenshot-pin-shortcut',
+  screenshotPinReady: 'screenshot-pin-ready',
+  screenshotPinShow: 'screenshot-pin-show',
   screenshotExported: 'screenshot-exported',
   // 内核安装进度
   kernelInstallProgress: 'kernel-install-progress',
@@ -62,4 +66,6 @@ export const STORAGE_KEYS = {
   quickpanelHistoryItems: 'thing_quickpanel_history_items',
   currencyRates: 'thing_quickpanel_currency_rates',
   monitorOsdConfig: 'thing_monitor_osd_config',
+  screenshotHistory: 'thing_screenshot_history',
+  screenshotPinIndex: 'thing_screenshot_pin_index',
 } as const