diff --git a/package-lock.json b/package-lock.json
index 2eb5ed3..6bd49a3 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "interview-coder-cn",
-  "version": "1.3.0",
+  "version": "1.4.2",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "interview-coder-cn",
-      "version": "1.3.0",
+      "version": "1.4.2",
       "hasInstallScript": true,
       "license": "CC BY-NC 4.0",
       "dependencies": {
@@ -13266,9 +13266,9 @@
       }
     },
     "node_modules/vite": {
-      "version": "7.1.3",
-      "resolved": "https://registry.npmjs.org/vite/-/vite-7.1.3.tgz",
-      "integrity": "sha512-OOUi5zjkDxYrKhTV3V7iKsoS37VUM7v40+HuwEmcrsf11Cdx9y3DIr2Px6liIcZFwt3XSRpQvFpL3WVy7ApkGw==",
+      "version": "7.2.2",
+      "resolved": "https://registry.npmjs.org/vite/-/vite-7.2.2.tgz",
+      "integrity": "sha512-BxAKBWmIbrDgrokdGZH1IgkIk/5mMHDreLDmCJ0qpyJaAteP8NvMhkwr/ZCQNqNH97bw/dANTE9PDzqwJghfMQ==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
@@ -13277,7 +13277,7 @@
         "picomatch": "^4.0.3",
         "postcss": "^8.5.6",
         "rollup": "^4.43.0",
-        "tinyglobby": "^0.2.14"
+        "tinyglobby": "^0.2.15"
       },
       "bin": {
         "vite": "bin/vite.js"
diff --git a/package.json b/package.json
index a7cbd62..958d04b 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "interview-coder-cn",
-  "version": "1.4.0",
+  "version": "1.4.2",
   "description": "编码面试解题助手，实时截屏并生成解题思路和答案",
   "main": "./out/main/index.js",
   "scripts": {
diff --git a/src/main/index.ts b/src/main/index.ts
index be210d4..75351bc 100644
--- a/src/main/index.ts
+++ b/src/main/index.ts
@@ -2,13 +2,20 @@ import 'dotenv/config'
 import { app, BrowserWindow, globalShortcut, dialog } from 'electron'
 import { autoUpdater } from 'electron-updater'
 
+type AbortLikeError = {
+  name?: string
+  code?: string
+  message?: unknown
+}
+
 // Swallow AbortError from user-initiated stream cancellations to keep console clean
 function isAbortError(error: unknown): boolean {
-  const err = error as any
-  return (
-    !!err &&
-    (err.name === 'AbortError' || err.code === 'ABORT_ERR' || /aborted/i.test(String(err.message)))
-  )
+  if (typeof error !== 'object' || error === null) {
+    return false
+  }
+  const err = error as AbortLikeError
+  const message = typeof err.message === 'string' ? err.message : ''
+  return err.name === 'AbortError' || err.code === 'ABORT_ERR' || /aborted/i.test(message)
 }
 
 process.on('unhandledRejection', (error) => {
diff --git a/src/main/shortcuts.ts b/src/main/shortcuts.ts
index bdb98f3..7c16ee8 100644
--- a/src/main/shortcuts.ts
+++ b/src/main/shortcuts.ts
@@ -1,4 +1,5 @@
 import { globalShortcut, ipcMain } from 'electron'
+import type { BrowserWindow } from 'electron'
 import type { ModelMessage } from 'ai'
 import { takeScreenshot } from './take-screenshot'
 import { getSolutionStream, getFollowUpStream } from './ai'
@@ -9,6 +10,7 @@ type Shortcut = {
   action: string
   key: string
   status: ShortcutStatus
+  registeredKeys: string[]
 }
 
 enum ShortcutStatus {
@@ -33,6 +35,44 @@ let currentStreamContext: StreamContext | null = null
 // Conversation history tracking
 let conversationMessages: ModelMessage[] = []
 
+const FRONT_REASSERT_DURATION = 5000
+const FRONT_REASSERT_INTERVAL = 150
+const FRONT_RELATIVE_LEVEL = 10
+let frontReassertTimer: NodeJS.Timeout | null = null
+
+function applyTopMost(win: BrowserWindow) {
+  if (!win || win.isDestroyed()) return
+  win.setAlwaysOnTop(true, 'screen-saver', FRONT_RELATIVE_LEVEL)
+  win.moveTop()
+}
+
+function keepWindowInFront(window: BrowserWindow) {
+  if (!window || window.isDestroyed()) return
+  if (frontReassertTimer) {
+    clearInterval(frontReassertTimer)
+    frontReassertTimer = null
+  }
+
+  const start = Date.now()
+  const reassert = () => {
+    if (!window.isVisible() || window.isDestroyed()) return false
+    applyTopMost(window)
+    return true
+  }
+
+  if (!reassert()) return
+
+  frontReassertTimer = setInterval(() => {
+    const shouldStop = Date.now() - start > FRONT_REASSERT_DURATION
+    if (shouldStop || !reassert()) {
+      if (frontReassertTimer) {
+        clearInterval(frontReassertTimer)
+        frontReassertTimer = null
+      }
+    }
+  }, FRONT_REASSERT_INTERVAL)
+}
+
 function abortCurrentStream(reason: AbortReason) {
   if (!currentStreamContext) return
   currentStreamContext.reason = reason
@@ -46,7 +86,13 @@ const callbacks: Record<string, () => void> = {
     if (mainWindow.isVisible()) {
       mainWindow.hide()
     } else {
-      mainWindow.show()
+      // 重新显示时不断重申置顶属性，抵消其他前台软件持续抢占
+      if (process.platform === 'darwin' || process.platform === 'win32') {
+        mainWindow.showInactive()
+      } else {
+        mainWindow.show()
+      }
+      keepWindowInFront(mainWindow)
     }
   },
 
@@ -194,16 +240,60 @@ const callbacks: Record<string, () => void> = {
   }
 }
 
+function unregisterShortcut(action: string) {
+  const shortcut = shortcuts[action]
+  if (!shortcut) return
+  if (shortcut.registeredKeys.length) {
+    shortcut.registeredKeys.forEach((registeredKey) => {
+      globalShortcut.unregister(registeredKey)
+    })
+  } else {
+    globalShortcut.unregister(shortcut.key)
+  }
+  shortcut.status = ShortcutStatus.Available
+  shortcut.registeredKeys = []
+}
+
+function getShortcutRegistrationKeys(key: string) {
+  const keys = [key]
+  if (process.platform !== 'win32') {
+    return keys
+  }
+  const parts = key.split('+')
+  const hasAlt = parts.includes('Alt')
+  const hasCtrl = parts.includes('CommandOrControl') || parts.includes('Control')
+  if (hasAlt && !hasCtrl) {
+    const aliasParts = [...parts]
+    const altIndex = aliasParts.indexOf('Alt')
+    if (altIndex >= 0) {
+      aliasParts.splice(altIndex, 0, 'CommandOrControl')
+      const aliasKey = aliasParts.join('+')
+      if (!keys.includes(aliasKey)) {
+        keys.push(aliasKey)
+      }
+    }
+  }
+  return keys
+}
+
 function registerShortcut(action: string, key: string) {
-  if (shortcuts[action]?.status === ShortcutStatus.Registered) {
-    globalShortcut.unregister(shortcuts[action].key)
-    shortcuts[action].status = ShortcutStatus.Available
+  if (shortcuts[action]) {
+    unregisterShortcut(action)
   }
-  const ok = globalShortcut.register(key, callbacks[action])
+
+  const keysToRegister = getShortcutRegistrationKeys(key)
+  const registeredKeys: string[] = []
+  keysToRegister.forEach((shortcutKey) => {
+    if (globalShortcut.register(shortcutKey, callbacks[action])) {
+      registeredKeys.push(shortcutKey)
+    }
+  })
+
   shortcuts[action] = {
     action,
     key,
-    status: ok ? ShortcutStatus.Registered : ShortcutStatus.Failed
+    status: registeredKeys.length ? ShortcutStatus.Registered : ShortcutStatus.Failed,
+    registeredKeys
   }
 }
 
diff --git a/src/renderer/src/coder/index.tsx b/src/renderer/src/coder/index.tsx
index 39bf4a8..81c3daf 100644
--- a/src/renderer/src/coder/index.tsx
+++ b/src/renderer/src/coder/index.tsx
@@ -32,7 +32,7 @@ export default function CoderPage() {
     return () => {
       window.api.removeSyncAppStateListener()
     }
-  }, [])
+  }, [syncAppState])
 
   return (
     <>
diff --git a/src/renderer/src/lib/store/shortcuts.ts b/src/renderer/src/lib/store/shortcuts.ts
index 48e7d18..48e74b2 100644
--- a/src/renderer/src/lib/store/shortcuts.ts
+++ b/src/renderer/src/lib/store/shortcuts.ts
@@ -26,6 +26,14 @@ interface ShortcutsStore extends ShortcutsState {
   resetShortcuts: () => void
 }
 
+type PersistedShortcutsState = {
+  shortcuts?: Record<string, Shortcut>
+}
+
+function isPersistedShortcutsState(value: unknown): value is PersistedShortcutsState {
+  return typeof value === 'object' && value !== null && 'shortcuts' in value
+}
+
 const defaultShortcuts: Record<string, Omit<Shortcut, 'defaultKey'>> = {
   hideOrShowMainWindow: {
     action: 'hideOrShowMainWindow',
@@ -101,8 +109,8 @@ export const useShortcutsStore = create<ShortcutsStore>()(
     {
       name: 'interview-coder-shortcuts',
       version: 2,
-      migrate: (state: any) => {
-        if (!state?.shortcuts) return state
+      migrate: (state: unknown) => {
+        if (!isPersistedShortcutsState(state) || !state.shortcuts) return state as ShortcutsStore
         // Merge in any new default shortcuts that are missing
         const defaults = Object.fromEntries(
           Object.entries(defaultShortcuts).map(([action, shortcut]) => [
@@ -116,7 +124,7 @@ export const useShortcutsStore = create<ShortcutsStore>()(
             ...defaults,
             ...state.shortcuts
           }
-        }
+        } as ShortcutsStore
       }
     }
   )
diff --git a/src/renderer/src/lib/utils/keyboard.ts b/src/renderer/src/lib/utils/keyboard.ts
index 74a9597..ac4ec8d 100644
--- a/src/renderer/src/lib/utils/keyboard.ts
+++ b/src/renderer/src/lib/utils/keyboard.ts
@@ -100,8 +100,14 @@ export function getShortcutAccelerator(event: KeyboardEvent) {
   }
 
   const modifiers: string[] = []
-  if (event.ctrlKey) modifiers.push(isMac ? 'Control' : 'CommandOrControl')
-  if (event.altKey) modifiers.push('Alt')
+  // AltRight on Windows reports AltGraph and toggles ctrlKey, so treat it as plain Alt
+  const isAltGraph =
+    typeof event.getModifierState === 'function' && event.getModifierState('AltGraph')
+  const isCtrlActive = event.ctrlKey && !isAltGraph
+  const isAltActive = event.altKey || isAltGraph
+
+  if (isCtrlActive) modifiers.push(isMac ? 'Control' : 'CommandOrControl')
+  if (isAltActive) modifiers.push('Alt')
   if (event.shiftKey) modifiers.push('Shift')
   if (event.metaKey) modifiers.push(isMac ? 'CommandOrControl' : 'Meta')
   if (modifiers.length === 0) return null