fix(planting): 支付完成后直接开启挖矿，跳过底池注入流程

- enableMining() 允许从 PAID 状态直接开启
- addPlanting() 树直接进入 effectiveTreeCount
- payOrder() 删除底池批次逻辑，直接调用 enableMining()

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/services/planting-service/src/application/services/planting-application.service.ts

@@ -268,7 +268,7 @@ export class PlantingApplicationService {
         // 保存订单状态
         await uow.saveOrder(order);
 
-        // 更新用户持仓
+        // 更新用户持仓（直接生效）
         const position = await uow.getOrCreatePosition(userId);
         position.addPlanting(
           order.treeCount.value,
@@ -277,18 +277,8 @@ export class PlantingApplicationService {
         );
         await uow.savePosition(position);
 
-        // 安排底池注入批次
-        const batch = await uow.findOrCreateCurrentBatch();
-        const poolAmount = this.fundAllocationService.getPoolInjectionAmount(
-          order.treeCount.value,
-        );
-        batch.addOrder(poolAmount);
-        await uow.saveBatch(batch);
-
-        // 计算注入时间（批次结束后）
-        const scheduledTime = new Date(batch.endDate);
-        scheduledTime.setHours(scheduledTime.getHours() + 1);
-        order.schedulePoolInjection(batch.id!, scheduledTime);
+        // 直接开启挖矿（跳过底池注入流程）
+        order.enableMining();
         await uow.saveOrder(order);
 
         // 8. 添加 Outbox 事件（在同一事务中保存）

backend/services/planting-service/src/domain/aggregates/planting-order.aggregate.ts

@@ -296,9 +296,14 @@ export class PlantingOrder {
 
   /**
    * 开启挖矿
+   * 支付完成后直接开启，跳过底池注入流程
    */
   enableMining(): void {
-    this.ensureStatus(PlantingOrderStatus.POOL_INJECTED);
+    this.ensureStatus(
+      PlantingOrderStatus.PAID,
+      PlantingOrderStatus.POOL_SCHEDULED,
+      PlantingOrderStatus.POOL_INJECTED,
+    );
 
     this._miningEnabledAt = new Date();
     this._status = PlantingOrderStatus.MINING_ENABLED;

backend/services/planting-service/src/domain/aggregates/planting-position.aggregate.ts

@@ -125,6 +125,7 @@ export class PlantingPosition {
 
   /**
    * 添加认种
+   * 支付完成后直接生效，不再等待底池注入
    */
   addPlanting(
     treeCount: number,
@@ -135,9 +136,14 @@ export class PlantingPosition {
       throw new Error('认种数量必须大于0');
     }
 
-    // 更新总数和待生效数
+    // 更新总数和有效数（直接生效）
     this._totalTreeCount += treeCount;
-    this._pendingTreeCount += treeCount;
+    this._effectiveTreeCount += treeCount;
+
+    // 设置首次挖矿开始时间
+    if (!this._firstMiningStartAt) {
+      this._firstMiningStartAt = new Date();
+    }
 
     // 更新省市分布
     let distribution = this._distributions.find((d) =>