🐛 fix(window): 避免 Windows 恢复窗口时重复最大化

- 恢复窗口场景不再触发最大化窗口切换修复

- 恢复期间 DPR 变化延迟到窗口状态稳定后处理

- 更新任务栏恢复窗口缩放策略测试

frontend/src/App.tsx

@@ -738,6 +738,10 @@ function App() {
               return;
           }
           lastRatio = currentRatio;
+          if (minimisedSeen || hiddenSeen) {
+              scheduleActivationFix();
+              return;
+          }
           void fixWindowScaleIfNeeded('ratio-change');
       };
 
@@ -764,6 +768,7 @@ function App() {
           if (activationTimer !== null) {
               window.clearTimeout(activationTimer);
           }
+          const delayMs = (minimisedSeen || hiddenSeen) ? 260 : 80;
           activationTimer = window.setTimeout(async () => {
               activationTimer = null;
               if (cancelled) return;
@@ -774,7 +779,7 @@ function App() {
               minimisedSeen = false;
               hiddenSeen = false;
               void fixWindowScaleIfNeeded(reason);
-          }, 80);
+          }, delayMs);
       };
 
       const handleWindowFocus = () => {

frontend/src/utils/windowStateUi.test.ts

@@ -20,7 +20,7 @@ describe('windowStateUi', () => {
   it('applies the Windows scale fix when a minimized taskbar window is restored with viewport drift', () => {
     expect(shouldApplyWindowsScaleFix('restore', true)).toBe(true);
     expect(shouldApplyWindowsScaleFix('restore', false)).toBe(false);
-    expect(shouldToggleMaximisedWindowForScaleFix('restore', true)).toBe(true);
+    expect(shouldToggleMaximisedWindowForScaleFix('restore', true)).toBe(false);
   });
 
   it('debounces resize-triggered Windows scale checks until window transitions settle', () => {

frontend/src/utils/windowStateUi.ts

@@ -8,7 +8,10 @@ export const shouldApplyWindowsScaleFix = (
   hasViewportScaleDrift: boolean,
 ): boolean => (reason === 'ratio-change' || reason === 'restore') && hasViewportScaleDrift;
 
-export const shouldToggleMaximisedWindowForScaleFix = shouldApplyWindowsScaleFix;
+export const shouldToggleMaximisedWindowForScaleFix = (
+  reason: WindowScaleFixReason,
+  hasViewportScaleDrift: boolean,
+): boolean => reason === 'ratio-change' && hasViewportScaleDrift;
 
 export const resolveWindowsScaleCheckDelayMs = (trigger: WindowsScaleCheckTrigger): number =>
   trigger === 'resize' ? 240 : 0;