feat(settings): 增加全局表格分页配置,支持自定义

frontend/src/composables/usePersistedPageSize.ts

@@ -1,26 +1,48 @@
+import { getConfiguredTableDefaultPageSize, normalizeTablePageSize } from '@/utils/tablePreferences'
+
 const STORAGE_KEY = 'table-page-size'
-const DEFAULT_PAGE_SIZE = 20
+const SOURCE_KEY = 'table-page-size-source'
 
 /**
  * 从 localStorage 读取/写入 pageSize
  * 全局共享一个 key，所有表格统一偏好
  */
-export function getPersistedPageSize(fallback = DEFAULT_PAGE_SIZE): number {
+export function getPersistedPageSize(fallback = getConfiguredTableDefaultPageSize()): number {
   try {
     const stored = localStorage.getItem(STORAGE_KEY)
     if (stored) {
-      const parsed = Number(stored)
-      if (Number.isFinite(parsed) && parsed > 0) return parsed
+      return normalizeTablePageSize(stored)
     }
   } catch {
     // localStorage 不可用（隐私模式等）
   }
-  return fallback
+  return normalizeTablePageSize(fallback)
 }
 
 export function setPersistedPageSize(size: number): void {
   try {
-    localStorage.setItem(STORAGE_KEY, String(size))
+    localStorage.setItem(STORAGE_KEY, String(normalizeTablePageSize(size)))
+    localStorage.setItem(SOURCE_KEY, 'user')
+  } catch {
+    // 静默失败
+  }
+}
+
+export function syncPersistedPageSizeWithSystemDefault(defaultSize = getConfiguredTableDefaultPageSize()): void {
+  try {
+    const normalizedDefault = normalizeTablePageSize(defaultSize)
+    const stored = localStorage.getItem(STORAGE_KEY)
+    const source = localStorage.getItem(SOURCE_KEY)
+    const normalizedStored = stored ? normalizeTablePageSize(stored) : null
+
+    if ((source === 'user' || (source === null && stored !== null)) && stored) {
+      localStorage.setItem(STORAGE_KEY, String(normalizedStored ?? normalizedDefault))
+      localStorage.setItem(SOURCE_KEY, 'user')
+      return
+    }
+
+    localStorage.setItem(STORAGE_KEY, String(normalizedDefault))
+    localStorage.setItem(SOURCE_KEY, 'system')
   } catch {
     // 静默失败
   }