release: v1.2.0 — unified images/ storage and legacy migration

Consolidate local images under data/images/, add docker migrate CLI,
startup index sync with orphan cleanup, and remove upload folder UI/API.

server/api/images/count.get.ts

@@ -1,5 +1,4 @@
 import { getImageUserFilter, requireApiOrAdminAuth } from '../../utils/access'
-import { isValidFolderName } from '../../utils/image-key'
 import { readBackendIdQuery } from '../../utils/image-query'
 import { createApiError } from '../../utils/api-error'
 import { countImages } from '../../utils/storage'
@@ -9,14 +8,12 @@ export default defineEventHandler(async (event) => {
   const userFilter = await getImageUserFilter(event)
 
   const query = getQuery(event)
-  const raw = typeof query.folder === 'string' ? query.folder.trim() : ''
-  const folder = raw && raw !== 'all' && isValidFolderName(raw) ? raw : undefined
   const backendId = readBackendIdQuery(query)
   if (backendId === null) {
     createApiError(event, 'INVALID_REQUEST', '无效的存储后端', 400)
   }
 
-  const total = await countImages(folder, userFilter, backendId)
+  const total = await countImages(userFilter, backendId)
 
   return { total }
 })