fix(web-admin): align schedule paid/arrears with yjf-only rule

Period 已缴费 now counts only 付款完成 transfers, matching backend
summarize_period.

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

web-admin/src/utils/protocol-sample-payment.test.ts

@@ -118,7 +118,7 @@ describe('sumSampleContractAmounts', () => {
 })
 
 describe('schedulePaidArrears', () => {
-  it('display paid includes dfj + jfqrz + yjf', () => {
+  it('display paid includes only yjf', () => {
     const { paid, arrears } = schedulePaidArrears(25880, [
       { payStatus: 'dfj', transferAmount: 480 },
       { payStatus: 'dfj', transferAmount: 6000 },
@@ -126,8 +126,8 @@ describe('schedulePaidArrears', () => {
       { payStatus: 'yjf', transferAmount: 200 },
       { payStatus: 'ytf', transferAmount: 50 }
     ])
-    assert.equal(paid, 6780)
-    assert.equal(arrears, 19100)
+    assert.equal(paid, 200)
+    assert.equal(arrears, 25680)
   })
 })