🔄 fix(tables): keep current page after edits & auto-fallback when page becomes empty

Includes ChannelsTable, RedemptionsTable and UsersTable:

• Refactor `refresh(page = activePage)` in all three tables so data reloads the requested (or current) page instead of forcing page 1.
• On single-row deletion (and bulk deletion in ChannelsTable):
  – Refresh current page immediately.
  – If the refreshed page has no data and `activePage > 1`, automatically load the previous page to avoid blank views.
• RedemptionsTable: corrected prior bug where `refresh` used `activePage - 1`.
• Misc: removed outdated inline comments and aligned search / reset flows.

Result: smoother UX—users stay on their working page, and pagination gracefully adjusts after deletions.

web/src/components/table/RedemptionsTable.js

@@ -151,9 +151,15 @@ const RedemptionsTable = () => {
                 title: t('确定是否要删除此兑换码？'),
                 content: t('此修改将不可逆'),
                 onOk: () => {
-                  manageRedemption(record.id, 'delete', record).then(() => {
-                    removeRecord(record.key);
-                  });
+                  (async () => {
+                    await manageRedemption(record.id, 'delete', record);
+                    await refresh();
+                    setTimeout(() => {
+                      if (redemptions.length === 0 && activePage > 1) {
+                        refresh(activePage - 1);
+                      }
+                    }, 100);
+                  })();
                 },
               });
             },
@@ -320,8 +326,13 @@ const RedemptionsTable = () => {
       });
   }, [pageSize]);
 
-  const refresh = async () => {
-    await loadRedemptions(activePage - 1, pageSize);
+  const refresh = async (page = activePage) => {
+    const { searchKeyword } = getFormValues();
+    if (searchKeyword === '') {
+      await loadRedemptions(page, pageSize);
+    } else {
+      await searchRedemptions(searchKeyword, page, pageSize);
+    }
   };
 
   const manageRedemption = async (id, action, record) => {
@@ -541,7 +552,6 @@ const RedemptionsTable = () => {
                 onClick={() => {
                   if (formApi) {
                     formApi.reset();
-                    // 重置后立即查询，使用setTimeout确保表单重置完成
                     setTimeout(() => {
                       setActivePage(1);
                       loadRedemptions(1, pageSize);