feat(admin,api,player): 结算预览分页、统计图表与返水限额

完善结算计算与预览 API（含后端分页），加强管理端结算/返水/权限，并优化玩家端投注单与队徽展示。

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

apps/player/src/stores/betSlip.ts

@@ -34,7 +34,7 @@ export const useBetSlipStore = defineStore('betSlip', () => {
     return Number.isFinite(n) ? n : null;
   }
 
-  /** 球赛/详情页：仅单关，且投注单同时只能有 1 项 */
+  /** 球赛/详情页：同场可多选，分笔单关；再点同一项可取消 */
   function addItem(item: SlipItem) {
     if (mode.value === 'parlay') items.value = [];
     mode.value = 'single';
@@ -44,13 +44,13 @@ export const useBetSlipStore = defineStore('betSlip', () => {
       (i) => i.selectionId === item.selectionId,
     );
     if (existing >= 0) {
-      items.value = [];
+      items.value.splice(existing, 1);
       return;
     }
-    items.value = [item];
+    items.value.push(item);
   }
 
-  /** 串关页专用：跨场组合，同场只保留一个选项 */
+  /** 串关页：同场/跨场均可多选，合成一张串关单 */
   function addParlayLeg(item: SlipItem): ParlayRejectReason | 'MAX_LEGS' | null {
     if (mode.value === 'single') items.value = [];
     mode.value = 'parlay';
@@ -77,7 +77,6 @@ export const useBetSlipStore = defineStore('betSlip', () => {
       return 'MAX_LEGS';
     }
 
-    items.value = items.value.filter((i) => i.matchId !== item.matchId);
     items.value.push(item);
     lastParlayError.value = null;
     return null;
@@ -101,10 +100,10 @@ export const useBetSlipStore = defineStore('betSlip', () => {
 
   const potentialReturn = computed(() => {
     if (!items.value.length) return 0;
-    if (mode.value === 'parlay' && items.value.length >= PARLAY_MIN_LEGS) {
+    if (mode.value === 'parlay' && canPlaceParlay.value) {
       return stake.value * totalOdds.value;
     }
-    return stake.value * items.value[0].odds;
+    return items.value.reduce((acc, i) => acc + stake.value * i.odds, 0);
   });
 
   const hasSameMatch = computed(() => {
@@ -116,8 +115,16 @@ export const useBetSlipStore = defineStore('betSlip', () => {
     () =>
       mode.value === 'parlay' &&
       items.value.length >= PARLAY_MIN_LEGS &&
-      items.value.length <= PARLAY_MAX_LEGS &&
-      !hasSameMatch.value,
+      items.value.length <= PARLAY_MAX_LEGS,
+  );
+
+  /** 详情页等同场多笔单关（串关模式不走此路径） */
+  const canPlaceBatchSingles = computed(
+    () => mode.value === 'single' && items.value.length >= 1,
+  );
+
+  const canSubmit = computed(
+    () => canPlaceParlay.value || canPlaceBatchSingles.value,
   );
 
   const drawerOpen = ref(false);
@@ -140,6 +147,8 @@ export const useBetSlipStore = defineStore('betSlip', () => {
     potentialReturn,
     hasSameMatch,
     canPlaceParlay,
+    canPlaceBatchSingles,
+    canSubmit,
     lastParlayError,
     drawerOpen,
     addItem,