fix(components): [date-picker-panel] wrong style when use showWeekNumber (#22559)

* fix: the selected row has '.current' class when show-week-number

* test: add test case

packages/components/date-picker-panel/src/date-picker-com/basic-date-table.vue

@@ -25,7 +25,7 @@
       <tr
         v-for="(row, rowKey) in rows"
         :key="rowKey"
-        :class="getRowKls(row[1])"
+        :class="getRowKls(showWeekNumber ? row[2] : row[1])"
       >
         <td
           v-for="(cell, columnKey) in row"

packages/components/date-picker/__tests__/date-picker.test.ts

@@ -3037,4 +3037,22 @@ describe('YearRange', () => {
       expect(wrapper.vm.value).toEqual('')
     })
   })
+
+  it('the selected row has .current class when show-week-number', async () => {
+    _mount(
+      `<el-date-picker
+        v-model="value"
+        type="week"
+        show-week-number
+      />`,
+      () => ({
+        value: '2025-10-23',
+      })
+    )
+    await nextTick()
+    const rows = document.querySelectorAll('.el-date-table__row')
+    const selectedRow = document.querySelectorAll('.el-date-table__row.current')
+    expect(rows[3].classList.contains('current')).toBeTruthy()
+    expect(selectedRow.length).toBe(1)
+  })
 })