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。

server/api/stats.get.ts

@@ -7,6 +7,34 @@ import {
   getFolderStorageStats,
   getUserScopedStorageStats
 } from '../utils/storage'
+import { buildBackendCapacity } from '../utils/storage-capacity'
+import { getActiveBackendRow } from '../utils/storage/resolver'
+
+interface StorageUsageStat {
+  usedBytes: number
+  totalBytes: number | null
+  percent: number | null
+}
+
+async function resolveStorageUsage(usedBytes: number): Promise<StorageUsageStat> {
+  const backend = getActiveBackendRow()
+  if (!backend) {
+    return { usedBytes, totalBytes: null, percent: null }
+  }
+
+  const capacity = await buildBackendCapacity(
+    backend.id,
+    backend.type,
+    usedBytes,
+    backend.quota_bytes
+  )
+
+  return {
+    usedBytes,
+    totalBytes: capacity.totalBytes,
+    percent: capacity.percent
+  }
+}
 
 export default defineEventHandler(async (event) => {
   const user = await requireUserAuth(event)
@@ -14,25 +42,30 @@ export default defineEventHandler(async (event) => {
 
   try {
     if (user.role === 'admin' && userFilter === 'admin') {
-      const [activity, storedCount, byFolder] = await Promise.all([
-        Promise.resolve(getActivityStats()),
+      const activity = getActivityStats()
+      const [storedCount, byFolder, storageUsage] = await Promise.all([
         countImages(),
-        getFolderStorageStats()
+        getFolderStorageStats(),
+        resolveStorageUsage(activity.uploadBytesTotal)
       ])
 
       return {
         ...activity,
         storedCount,
         byFolder,
-        userCount: countUsers()
+        userCount: countUsers(),
+        storageUsage
       }
     }
 
     const scoped = await getUserScopedStorageStats(user.id)
+    const storageUsage = await resolveStorageUsage(scoped.uploadBytesTotal)
 
     return {
       uploadToday: scoped.uploadToday,
+      uploadYesterday: scoped.uploadYesterday,
       uploadMonth: scoped.uploadMonth,
+      uploadLastMonth: scoped.uploadLastMonth,
       deleteToday: 0,
       deleteMonth: 0,
       uploadTotal: scoped.storedCount,
@@ -44,7 +77,8 @@ export default defineEventHandler(async (event) => {
         count: item.count
       })),
       storedCount: scoped.storedCount,
-      byFolder: scoped.byFolder
+      byFolder: scoped.byFolder,
+      storageUsage
     }
   } catch (error) {
     logException('stats failed', error)