fix(capture): preserve inline padding after screenshots

Restore only the padding properties changed by each capture mode so partial inline padding is not cleared after cleanup.

src/composables/useScreenCapture.ts

@@ -4,7 +4,12 @@
  */
 import { ref } from 'vue'
 import { captureAsImageData } from '@/utils/snapCapture'
-import { resolveCaptureBoxSizing, waitForCaptureLayoutStabilization } from '@/utils/captureLayout'
+import {
+  restoreCapturePadding,
+  resolveCaptureBoxSizing,
+  snapshotCapturePadding,
+  waitForCaptureLayoutStabilization,
+} from '@/utils/captureLayout'
 import { useToast } from '@/composables/useToast'
 import { useLayoutStore } from '@/stores/layout'
 import { usePlatformService } from '@/services'
@@ -137,8 +142,7 @@ export function useScreenCapture() {
     captureError.value = null
 
     // 截图外框只由显式选项开启，普通卡片截图不改变原布局。
-    const originalPadding = element.style.padding
-    const originalPaddingBottom = element.style.paddingBottom
+    const originalPadding = snapshotCapturePadding(element.style, options?.captureFrame === true)
     const originalBoxSizing = element.style.boxSizing
     const originalPosition = element.style.position
     const originalWidth = element.style.width
@@ -439,8 +443,7 @@ export function useScreenCapture() {
       watermark.remove()
 
       // 恢复元素样式
-      element.style.padding = originalPadding
-      element.style.paddingBottom = originalPaddingBottom
+      restoreCapturePadding(element.style, originalPadding)
       element.style.boxSizing = originalBoxSizing
       element.style.position = originalPosition
       element.style.width = originalWidth

src/utils/captureLayout.test.ts

@@ -1,6 +1,56 @@
 import { describe, it } from 'node:test'
 import assert from 'node:assert/strict'
-import { resolveCaptureBoxSizing, waitForCaptureLayoutStabilization } from './captureLayout'
+import {
+  restoreCapturePadding,
+  resolveCaptureBoxSizing,
+  snapshotCapturePadding,
+  waitForCaptureLayoutStabilization,
+} from './captureLayout'
+
+describe('inline padding restoration', () => {
+  it('preserves unrelated padding longhands after an unframed capture', () => {
+    const style = {
+      paddingTop: '',
+      paddingRight: '',
+      paddingBottom: '',
+      paddingLeft: '12px',
+    }
+    const originalPadding = snapshotCapturePadding(style, false)
+
+    style.paddingBottom = '48px'
+    restoreCapturePadding(style, originalPadding)
+
+    assert.deepEqual(style, {
+      paddingTop: '',
+      paddingRight: '',
+      paddingBottom: '',
+      paddingLeft: '12px',
+    })
+  })
+
+  it('restores every padding longhand after a framed capture', () => {
+    const style = {
+      paddingTop: '',
+      paddingRight: '',
+      paddingBottom: '',
+      paddingLeft: '12px',
+    }
+    const originalPadding = snapshotCapturePadding(style, true)
+
+    style.paddingTop = '16px'
+    style.paddingRight = '40px'
+    style.paddingBottom = '48px'
+    style.paddingLeft = '40px'
+    restoreCapturePadding(style, originalPadding)
+
+    assert.deepEqual(style, {
+      paddingTop: '',
+      paddingRight: '',
+      paddingBottom: '',
+      paddingLeft: '12px',
+    })
+  })
+})
 
 describe('resolveCaptureBoxSizing', () => {
   it('adds frame width without narrowing the captured content', () => {

src/utils/captureLayout.ts

@@ -1,6 +1,37 @@
 const DEFAULT_NARROWING_BASE_WIDTH = 525
 const NARROWING_SCALE_FACTOR = 0.3
 
+interface CapturePaddingStyle {
+  paddingTop: string
+  paddingRight: string
+  paddingBottom: string
+  paddingLeft: string
+}
+
+interface CapturePaddingSnapshot extends CapturePaddingStyle {
+  restoreAll: boolean
+}
+
+export function snapshotCapturePadding(style: CapturePaddingStyle, captureFrame: boolean): CapturePaddingSnapshot {
+  return {
+    paddingTop: style.paddingTop,
+    paddingRight: style.paddingRight,
+    paddingBottom: style.paddingBottom,
+    paddingLeft: style.paddingLeft,
+    restoreAll: captureFrame,
+  }
+}
+
+export function restoreCapturePadding(style: CapturePaddingStyle, snapshot: CapturePaddingSnapshot): void {
+  // 普通截图只改动底部水印留白；外框截图覆盖了整个 padding，才需要逐项恢复。
+  if (snapshot.restoreAll) {
+    style.paddingTop = snapshot.paddingTop
+    style.paddingRight = snapshot.paddingRight
+    style.paddingLeft = snapshot.paddingLeft
+  }
+  style.paddingBottom = snapshot.paddingBottom
+}
+
 interface CaptureBoxSizingOptions {
   currentWidth: number
   progressiveNarrowing?: number | boolean