fix(tables): сохранение размера страницы и showSizeChanger

Размер таблицы сохраняется в localStorage, опции 10/20/50/100 на всех list-страницах.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/utils/tablePagination.ts

@@ -0,0 +1,44 @@
+export const TABLE_PAGE_SIZE_OPTIONS = [10, 20, 50, 100] as const;
+export const DEFAULT_TABLE_PAGE_SIZE = 20;
+
+const STORAGE_PREFIX = 'admin.table.';
+
+export function getSavedPageSize(tableKey: string, fallback = DEFAULT_TABLE_PAGE_SIZE): number {
+    const raw = localStorage.getItem(`${STORAGE_PREFIX}${tableKey}.pageSize`);
+    const size = raw ? Number(raw) : fallback;
+    return (TABLE_PAGE_SIZE_OPTIONS as readonly number[]).includes(size) ? size : fallback;
+}
+
+export function savePageSize(tableKey: string, size: number): void {
+    localStorage.setItem(`${STORAGE_PREFIX}${tableKey}.pageSize`, String(size));
+}
+
+export function getTablePagination(
+    params: { offset?: number; limit?: number },
+    total?: number
+) {
+    const pageSize = params.limit || DEFAULT_TABLE_PAGE_SIZE;
+    return {
+        total,
+        current: Math.floor((params.offset || 0) / pageSize) + 1,
+        pageSize,
+        showSizeChanger: true,
+        pageSizeOptions: [...TABLE_PAGE_SIZE_OPTIONS],
+    };
+}
+
+export function mergeTablePagination<T extends { offset?: number; limit?: number }>(
+    prev: T,
+    pagination: { current?: number; pageSize?: number },
+    tableKey: string
+): T {
+    const pageSize = pagination.pageSize || prev.limit || DEFAULT_TABLE_PAGE_SIZE;
+    if (pagination.pageSize && pagination.pageSize !== prev.limit) {
+        savePageSize(tableKey, pageSize);
+    }
+    return {
+        ...prev,
+        offset: ((pagination.current ?? 1) - 1) * pageSize,
+        limit: pageSize,
+    };
+}