feat(frontend): 添加存款明细展示

- 在存款计划弹窗中添加详细明细表格
  - 收入明细列表（显示预算/实际/计算用金额）
  - 支出明细列表（显示超支标记）
  - 计算说明标签（使用预算/使用实际/超支/按天折算）

- 支持新旧版本兼容
  - 有 details 字段时显示详细明细
  - 无 details 字段时显示旧版汇总

- UI 优化
  - 超支项目红色边框高亮
  - 月度/年度标签区分
  - 计算汇总和公式展示
  - 移动端响应式布局

Web/src/views/budgetV2/modules/SavingsBudgetContent.vue

@@ -74,12 +74,168 @@
   <PopupContainerV2
     v-model:show="showDetailPopup"
     title="计划存款明细"
-    :height="'80%'"
+    :height="'85%'"
   >
     <div class="popup-body">
       <div
         v-if="currentBudget"
         class="detail-content"
+      >
+        <!-- 明细表格 -->
+        <div
+          v-if="currentBudget.details"
+          class="detail-tables"
+        >
+          <!-- 收入明细 -->
+          <div class="detail-section income-section">
+            <div class="section-title">
+              <van-icon name="balance-o" />
+              收入明细
+            </div>
+            <div class="detail-table">
+              <div
+                v-for="item in currentBudget.details.incomeItems"
+                :key="item.id"
+                class="detail-item"
+              >
+                <div class="item-header">
+                  <span class="item-name">{{ item.name }}</span>
+                  <van-tag
+                    size="mini"
+                    :type="item.type === 1 ? 'default' : 'primary'"
+                  >
+                    {{ item.type === 1 ? '月度' : '年度' }}
+                  </van-tag>
+                </div>
+                <div class="item-amounts">
+                  <div class="amount-row">
+                    <span class="amount-label">预算</span>
+                    <span class="amount-value">¥{{ formatMoney(item.budgetLimit) }}</span>
+                  </div>
+                  <div class="amount-row">
+                    <span class="amount-label">实际</span>
+                    <span
+                      class="amount-value"
+                      :class="{ warning: item.isOverBudget }"
+                    >
+                      ¥{{ formatMoney(item.actualAmount) }}
+                    </span>
+                  </div>
+                  <div class="amount-row highlight">
+                    <span class="amount-label">计算用</span>
+                    <span class="amount-value income">¥{{ formatMoney(item.effectiveAmount) }}</span>
+                  </div>
+                </div>
+                <div class="item-note">
+                  <van-tag
+                    size="mini"
+                    plain
+                    :type="item.isOverBudget ? 'warning' : 'success'"
+                  >
+                    {{ item.calculationNote }}
+                  </van-tag>
+                </div>
+              </div>
+            </div>
+          </div>
+
+          <!-- 支出明细 -->
+          <div class="detail-section expense-section">
+            <div class="section-title">
+              <van-icon name="bill-o" />
+              支出明细
+            </div>
+            <div class="detail-table">
+              <div
+                v-for="item in currentBudget.details.expenseItems"
+                :key="item.id"
+                class="detail-item"
+                :class="{ overbudget: item.isOverBudget }"
+              >
+                <div class="item-header">
+                  <span class="item-name">{{ item.name }}</span>
+                  <van-tag
+                    size="mini"
+                    :type="item.type === 1 ? 'default' : 'primary'"
+                  >
+                    {{ item.type === 1 ? '月度' : '年度' }}
+                  </van-tag>
+                </div>
+                <div class="item-amounts">
+                  <div class="amount-row">
+                    <span class="amount-label">预算</span>
+                    <span class="amount-value">¥{{ formatMoney(item.budgetLimit) }}</span>
+                  </div>
+                  <div class="amount-row">
+                    <span class="amount-label">实际</span>
+                    <span
+                      class="amount-value"
+                      :class="{ danger: item.isOverBudget }"
+                    >
+                      ¥{{ formatMoney(item.actualAmount) }}
+                    </span>
+                  </div>
+                  <div class="amount-row highlight">
+                    <span class="amount-label">计算用</span>
+                    <span class="amount-value expense">¥{{ formatMoney(item.effectiveAmount) }}</span>
+                  </div>
+                </div>
+                <div class="item-note">
+                  <van-tag
+                    size="mini"
+                    plain
+                    :type="item.isOverBudget ? 'danger' : 'default'"
+                  >
+                    {{ item.calculationNote }}
+                  </van-tag>
+                  <van-tag
+                    v-if="item.isOverBudget"
+                    size="mini"
+                    type="danger"
+                  >
+                    超支
+                  </van-tag>
+                </div>
+              </div>
+            </div>
+          </div>
+
+          <!-- 计算汇总 -->
+          <div class="detail-section formula-section">
+            <div class="section-title">
+              <van-icon name="calculator-o" />
+              计算汇总
+            </div>
+            <div class="formula-box">
+              <div class="formula-row">
+                <span class="formula-label">收入合计</span>
+                <span class="formula-value income">
+                  ¥{{ formatMoney(currentBudget.details.summary.totalIncomeBudget) }}
+                </span>
+              </div>
+              <div class="formula-row">
+                <span class="formula-label">支出合计</span>
+                <span class="formula-value expense">
+                  ¥{{ formatMoney(currentBudget.details.summary.totalExpenseBudget) }}
+                </span>
+              </div>
+              <div class="formula-row highlight">
+                <span class="formula-label">计划存款</span>
+                <span class="formula-value primary">
+                  ¥{{ formatMoney(currentBudget.details.summary.plannedSavings) }}
+                </span>
+              </div>
+            </div>
+            <div class="formula-text">
+              {{ currentBudget.details.summary.calculationFormula }}
+            </div>
+          </div>
+        </div>
+
+        <!-- 旧版汇总（无明细数据时显示） -->
+        <div
+          v-else
+          class="legacy-summary"
         >
           <div class="detail-section income-section">
             <div class="section-title">
@@ -169,6 +325,7 @@
           </div>
         </div>
       </div>
+    </div>
   </PopupContainerV2>
 </template>
 
@@ -477,4 +634,128 @@ const getProgressColor = (budget) => {
   color: var(--van-text-color-2);
   padding: 0 8px;
 }
+
+/* 明细表格样式 */
+.detail-tables {
+  display: flex;
+  flex-direction: column;
+  gap: 16px;
+}
+
+.detail-table {
+  display: flex;
+  flex-direction: column;
+  gap: 12px;
+}
+
+.detail-item {
+  background-color: var(--van-light-gray);
+  border-radius: 8px;
+  padding: 12px;
+  border-left: 3px solid var(--van-gray-4);
+}
+
+.detail-item.overbudget {
+  border-left-color: var(--van-danger-color);
+  background-color: rgba(245, 34, 45, 0.05);
+}
+
+.item-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  margin-bottom: 10px;
+}
+
+.item-name {
+  font-size: 15px;
+  font-weight: 600;
+  color: var(--van-text-color);
+}
+
+.item-amounts {
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+  margin-bottom: 8px;
+}
+
+.amount-row {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  font-size: 13px;
+}
+
+.amount-row.highlight {
+  padding-top: 6px;
+  margin-top: 4px;
+  border-top: 1px dashed var(--van-border-color);
+  font-weight: 600;
+}
+
+.amount-label {
+  color: var(--van-text-color-2);
+}
+
+.amount-value {
+  font-family: DIN Alternate, system-ui;
+  font-weight: 600;
+  color: var(--van-text-color);
+}
+
+.amount-value.income {
+  color: var(--van-success-color);
+}
+
+.amount-value.expense {
+  color: var(--van-danger-color);
+}
+
+.amount-value.warning {
+  color: var(--van-warning-color);
+}
+
+.amount-value.danger {
+  color: var(--van-danger-color);
+}
+
+.item-note {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  flex-wrap: wrap;
+}
+
+.formula-row {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  padding: 8px 0;
+  font-size: 14px;
+}
+
+.formula-row.highlight {
+  margin-top: 8px;
+  padding-top: 12px;
+  border-top: 2px solid var(--van-border-color);
+  font-size: 16px;
+  font-weight: 600;
+}
+
+.formula-value.primary {
+  color: var(--van-primary-color);
+  font-size: 18px;
+}
+
+.formula-text {
+  margin-top: 12px;
+  padding: 10px;
+  background-color: var(--van-light-gray);
+  border-radius: 6px;
+  font-size: 13px;
+  color: var(--van-text-color-2);
+  text-align: center;
+  font-family: DIN Alternate, system-ui;
+}
 </style>