refactor: 重构设置、API、图库与存储页面前端结构。

将操作日志并入设置侧栏，补齐检查更新提示与版本接口刷新；拆分各模块组件并修复图库搜索分页变量。

app/components/gallery/GallerySelectionBar.vue

@@ -0,0 +1,55 @@
+<script setup lang="ts">
+import type { ImageItem } from '~/types/image'
+
+const props = defineProps<{
+  items: ImageItem[]
+  selectedKeys: Set<string>
+}>()
+
+const emit = defineEmits<{
+  'update:selectedKeys': [value: Set<string>]
+  'clear': []
+}>()
+
+const { t } = useI18n()
+
+const allSelected = computed(() =>
+  props.items.length > 0 && props.items.every(item => props.selectedKeys.has(item.key))
+)
+
+const someSelected = computed(() =>
+  props.items.some(item => props.selectedKeys.has(item.key))
+)
+
+const indeterminate = computed(() => someSelected.value && !allSelected.value)
+
+function toggleAll(value: boolean | 'indeterminate') {
+  if (value === true) {
+    emit('update:selectedKeys', new Set(props.items.map(item => item.key)))
+    return
+  }
+  emit('update:selectedKeys', new Set())
+}
+</script>
+
+<template>
+  <div class="flex min-w-0 items-center gap-3">
+    <UCheckbox
+      :model-value="allSelected ? true : indeterminate ? 'indeterminate' : false"
+      :disabled="!items.length"
+      :aria-label="t('stats.selectAll')"
+      @update:model-value="toggleAll"
+    />
+    <p class="text-sm text-muted">
+      {{ t('stats.selectedItems', { n: selectedKeys.size }) }}
+    </p>
+    <button
+      type="button"
+      class="text-sm text-primary hover:underline disabled:pointer-events-none disabled:opacity-40"
+      :disabled="selectedKeys.size === 0"
+      @click="emit('clear')"
+    >
+      {{ t('stats.clear') }}
+    </button>
+  </div>
+</template>