feat(wallet-service): 新增分享权益池账户S0000000005

- 新增 S0000000005 分享权益池系统账户 (user_id = -5)
- 修改 reward-service: 无推荐人的分享权益(500 USDT/棵)进入分享权益池
- 与总部社区账户(S0000000001)分离，便于单独追踪无推荐人的分享权益

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

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

backend/services/reward-service/src/domain/services/reward-calculation.service.ts

@@ -59,6 +59,9 @@ const OPERATION_FEE_ACCOUNT_ID = BigInt(3);
 // RWAD 1号底池账户ID (需要在系统初始化时创建)
 const RWAD_POOL_ACCOUNT_ID = BigInt(4);
 
+// 分享权益池账户ID (无推荐人时分享权益进入此账户)
+const SHARE_RIGHT_POOL_USER_ID = BigInt(-5);
+
 @Injectable()
 export class RewardCalculationService {
   private readonly logger = new Logger(RewardCalculationService.name);
@@ -370,15 +373,15 @@ export class RewardCalculationService {
         })];
       }
     } else {
-      // 无推荐人，进总部社区
-      this.logger.debug(`[calculateShareRights] no referrer -> HEADQUARTERS`);
+      // 无推荐人，进分享权益池 (S0000000005)
+      this.logger.debug(`[calculateShareRights] no referrer -> SHARE_RIGHT_POOL (S0000000005)`);
       return [RewardLedgerEntry.createSettleable({
-        userId: HEADQUARTERS_COMMUNITY_USER_ID,
-        accountSequence: 'S0000000001',
+        userId: SHARE_RIGHT_POOL_USER_ID,
+        accountSequence: 'S0000000005',
         rewardSource,
         usdtAmount,
         hashpowerAmount: hashpower,
-        memo: '分享权益：无推荐人，进总部社区',
+        memo: '分享权益：无推荐人，进分享权益池',
       })];
     }
   }

backend/services/wallet-service/prisma/migrations/20241214100000_add_share_right_pool_account/migration.sql

@@ -0,0 +1,11 @@
+-- Add share right pool account for users without referrers
+-- When a user plants a tree but has no inviter, the 500 USDT share right
+-- goes to this dedicated pool instead of the headquarters community account
+
+-- S0000000005: 分享权益池 (Share Right Pool)
+-- Receives: 无推荐人用户的分享权益 500 USDT per tree
+INSERT INTO "wallet_accounts" (
+    "account_sequence", "user_id", "status", "created_at", "updated_at"
+) VALUES (
+    'S0000000005', -5, 'ACTIVE', CURRENT_TIMESTAMP, CURRENT_TIMESTAMP
+) ON CONFLICT ("account_sequence") DO NOTHING;