```

feat(split): 添加分账诊断功能用于后台展示

- 新增 SplitCalculator::diagnose() 方法，用于诊断订单分账问题
- 返回分账来源、佣金总额、规则总额及具体问题说明
- 在管理员分账订单控制器中集成诊断信息显示
- 优化前端表格显示分账来源标签和诊断提示信息
- 修复佣金奖励查询中 agent_id 使用错误的问题
```

application/admin/view/shopro/split/order/index.html

@@ -164,6 +164,24 @@
         line-height: 1.5;
         white-space: nowrap;
     }
+    .source-tag {
+        display: inline-block;
+        padding: 0 6px;
+        border-radius: 4px;
+        font-size: 11px;
+        line-height: 18px;
+        white-space: nowrap;
+        margin-top: 4px;
+    }
+    .source-tag.commission { background: #ecf5ff; color: #409eff; }
+    .source-tag.rule { background: #fdf6ec; color: #e6a23c; }
+    .diagnose-hint {
+        font-size: 11px;
+        color: #e6a23c;
+        line-height: 1.5;
+        margin-top: 4px;
+        white-space: normal;
+    }
     .op-hint {
         font-size: 12px;
         color: #909399;
@@ -230,11 +248,14 @@
                     </div>
                 </template>
             </el-table-column>
-            <el-table-column label="金额" width="128" align="right">
+            <el-table-column label="金额" width="138" align="right">
                 <template slot-scope="s">
                     <div class="amount-cell">
                         <div class="money-line">订单 <span class="money-text">￥{{ formatMoney(s.row.total_amount) }}</span></div>
                         <div class="money-line split-line">分账 <span class="money-text">￥{{ formatMoney(s.row.split_amount) }}</span></div>
+                        <span v-if="s.row.split_source_text" :class="'source-tag ' + (s.row.split_source === 'commission' ? 'commission' : 'rule')">
+                            {{ s.row.split_source_text }}
+                        </span>
                     </div>
                 </template>
             </el-table-column>
@@ -252,6 +273,9 @@
                             <span class="recv-amt">￥{{ formatMoney(r.amount) }}</span>
                         </div>
                         <div v-if="s.row.receiver_preview" class="recv-preview-hint">按当前规则预估（历史失败单未落库明细）</div>
+                        <div v-if="s.row.split_diagnose && s.row.split_diagnose.length && s.row.split_source === 'rule'" class="diagnose-hint">
+                            {{ s.row.split_diagnose.join('；') }}
+                        </div>
                     </div>
                     <span v-else class="cell-sub-plain">—</span>
                 </template>