feat: add configurable opacity and blur settings for the transparent theme background

src/App.vue

@@ -49,6 +49,26 @@ const backgroundImages = ref<string[]>([])
 const activeImageIndex = ref(0)
 const isTransparentTheme = computed(() => globalTheme.name.value === 'transparent')
 
+function getStoredNumber(key: string, fallback: number, min: number, max: number) {
+  const parsed = Number.parseFloat(localStorage.getItem(key) || '')
+  if (!Number.isFinite(parsed)) return fallback
+
+  return Math.min(max, Math.max(min, parsed))
+}
+
+function applyTransparentBackgroundSettings() {
+  document.documentElement.style.setProperty(
+    '--transparent-background-poster-opacity',
+    getStoredNumber('transparency-background-poster-opacity', 1, 0, 1).toString(),
+  )
+  document.documentElement.style.setProperty(
+    '--transparent-background-blur',
+    `${getStoredNumber('transparency-background-blur', 16, 0, 30)}px`,
+  )
+}
+
+applyTransparentBackgroundSettings()
+
 // 心跳检测
 let heartbeatInterval: number | null = null
 
@@ -266,7 +286,11 @@ onUnmounted(() => {
 <template>
   <div class="app-wrapper">
     <!-- 透明主题背景 -->
-    <div v-if="backgroundImages.length > 0 && (isTransparentTheme || !isLogin)" class="background-container">
+    <div
+      v-if="backgroundImages.length > 0 && (isTransparentTheme || !isLogin)"
+      class="background-container"
+      :class="{ 'is-transparent-theme': isTransparentTheme && isLogin }"
+    >
       <div
         v-for="(imageUrl, index) in backgroundImages"
         :key="`bg-${index}-${loginStateKey}`"
@@ -331,11 +355,15 @@ onUnmounted(() => {
   }
 }
 
+.background-container.is-transparent-theme .background-image.active {
+  opacity: var(--transparent-background-poster-opacity, 1);
+}
+
 /* 全局磨砂层 */
 .global-blur-layer {
   position: absolute;
   z-index: 1;
-  backdrop-filter: blur(16px);
+  backdrop-filter: blur(var(--transparent-background-blur, 16px));
   background-color: rgba(128, 128, 128, 30%);
   block-size: 100%;
   inline-size: 100%;

src/layouts/components/UserProfile.vue

@@ -58,6 +58,8 @@ const customCSS = ref('')
 // 透明度相关
 const transparencyOpacity = ref(parseFloat(localStorage.getItem('transparency-opacity') || '0.3'))
 const transparencyBlur = ref(parseFloat(localStorage.getItem('transparency-blur') || '10'))
+const backgroundPosterOpacity = ref(parseFloat(localStorage.getItem('transparency-background-poster-opacity') || '1'))
+const backgroundBlur = ref(parseFloat(localStorage.getItem('transparency-background-blur') || '16'))
 const transparencyLevel = ref(localStorage.getItem('transparency-level') || 'medium')
 const isTransparentTheme = computed(() => currentThemeName.value === 'transparent')
 const showTransparencyDialog = ref(false)
@@ -383,6 +385,15 @@ async function saveCustomCSS() {
 function applyTransparencySettings() {
   const root = document.documentElement
 
+  if (!Number.isFinite(backgroundPosterOpacity.value)) {
+    backgroundPosterOpacity.value = 1
+  }
+  backgroundPosterOpacity.value = Math.min(1, Math.max(0, backgroundPosterOpacity.value))
+  if (!Number.isFinite(backgroundBlur.value)) {
+    backgroundBlur.value = 16
+  }
+  backgroundBlur.value = Math.min(30, Math.max(0, backgroundBlur.value))
+
   // 设置CSS变量
   root.style.setProperty('--transparent-opacity', transparencyOpacity.value.toString())
   root.style.setProperty('--transparent-opacity-light', (transparencyOpacity.value * 0.67).toString())
@@ -390,10 +401,14 @@ function applyTransparencySettings() {
   root.style.setProperty('--transparent-blur', `${transparencyBlur.value}px`)
   root.style.setProperty('--transparent-blur-light', `${transparencyBlur.value * 0.6}px`)
   root.style.setProperty('--transparent-blur-heavy', `${transparencyBlur.value * 1.6}px`)
+  root.style.setProperty('--transparent-background-poster-opacity', backgroundPosterOpacity.value.toString())
+  root.style.setProperty('--transparent-background-blur', `${backgroundBlur.value}px`)
 
   // 保存到本地存储
   localStorage.setItem('transparency-opacity', transparencyOpacity.value.toString())
   localStorage.setItem('transparency-blur', transparencyBlur.value.toString())
+  localStorage.setItem('transparency-background-poster-opacity', backgroundPosterOpacity.value.toString())
+  localStorage.setItem('transparency-background-blur', backgroundBlur.value.toString())
 }
 
 // 调整透明度预设
@@ -434,10 +449,22 @@ function onBlurChange() {
   transparencyLevel.value = ''
 }
 
+// 背景海报透明度变化处理
+function onBackgroundPosterOpacityChange() {
+  applyTransparencySettings()
+}
+
+// 背景磨砂变化处理
+function onBackgroundBlurChange() {
+  applyTransparencySettings()
+}
+
 // 重置透明度设置
 function resetTransparencySettings() {
   transparencyOpacity.value = 0.3
   transparencyBlur.value = 10
+  backgroundPosterOpacity.value = 1
+  backgroundBlur.value = 16
   transparencyLevel.value = 'medium'
   applyTransparencySettings()
 }
@@ -821,6 +848,38 @@ onUnmounted(() => {
             />
           </div>
 
+          <!-- 背景海报透明度滑动条 -->
+          <div>
+            <div class="d-flex align-center justify-space-between mb-2">
+              <span class="text-body-2">{{ t('theme.backgroundPosterOpacity') }}</span>
+              <span class="text-caption">{{ Math.round(backgroundPosterOpacity * 100) }}%</span>
+            </div>
+            <VSlider
+              v-model="backgroundPosterOpacity"
+              :min="0"
+              :max="1"
+              :step="0.01"
+              color="primary"
+              @update:model-value="onBackgroundPosterOpacityChange"
+            />
+          </div>
+
+          <!-- 背景磨砂滑动条 -->
+          <div>
+            <div class="d-flex align-center justify-space-between mb-2">
+              <span class="text-body-2">{{ t('theme.backgroundBlur') }}</span>
+              <span class="text-caption">{{ backgroundBlur }}px</span>
+            </div>
+            <VSlider
+              v-model="backgroundBlur"
+              :min="0"
+              :max="30"
+              :step="1"
+              color="primary"
+              @update:model-value="onBackgroundBlurChange"
+            />
+          </div>
+
           <!-- 预设按钮 -->
           <div>
             <span class="text-body-2 d-block mb-2">{{ t('common.preset') }}</span>

src/locales/en-US.ts

@@ -149,6 +149,8 @@ export default {
     transparencyAdjust: 'Transparency Adjustment',
     transparencyOpacity: 'Opacity',
     transparencyBlur: 'Blur',
+    backgroundPosterOpacity: 'Background Opacity',
+    backgroundBlur: 'Background Frosted Blur',
     transparencyReset: 'Reset',
     transparencyLow: 'Low Transparency',
     transparencyMedium: 'Medium Transparency',

src/locales/zh-CN.ts

@@ -149,6 +149,8 @@ export default {
     transparencyAdjust: '透明度调整',
     transparencyOpacity: '透明度',
     transparencyBlur: '模糊度',
+    backgroundPosterOpacity: '背景透明度',
+    backgroundBlur: '背景磨砂效果',
     transparencyReset: '重置',
     transparencyLow: '低透明度',
     transparencyMedium: '中等透明度',

src/locales/zh-TW.ts

@@ -149,6 +149,8 @@ export default {
     transparencyAdjust: '透明度調整',
     transparencyOpacity: '透明度',
     transparencyBlur: '模糊度',
+    backgroundPosterOpacity: '背景透明度',
+    backgroundBlur: '背景磨砂效果',
     transparencyReset: '重置',
     transparencyLow: '低透明度',
     transparencyMedium: '中等透明度',