客户端心跳时打印显卡温度功耗和算力日志，并带回今日预估积分。

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

app/api.py

@@ -316,6 +316,7 @@ def heartbeat(body: HeartbeatIn, request: Request, db: Db) -> HeartbeatOut:
         client_ip=client_ip(request),
         hardware_fingerprint=body.hardware_fingerprint,
     )
+    days = node.recovery_days or 540
     return HeartbeatOut(
         sn=node.sn,
         display_node_id=node.display_node_id,
@@ -326,6 +327,8 @@ def heartbeat(body: HeartbeatIn, request: Request, db: Db) -> HeartbeatOut:
         gpu_generation=node.gpu_generation,
         recovery_days=node.recovery_days,
         recoverable_stake_amount=node.recoverable_stake_amount,
+        purchase_amount=node.purchase_amount,
+        estimated_daily_points=money(node.purchase_amount / Decimal(days)),
     )