仓位管理新增删除轮次功能

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

ft-app/app/routers/positions.py

@@ -120,3 +120,12 @@ def close_round(
         r.status = result
         db.commit()
     return RedirectResponse("/positions/", status_code=303)
+
+
+@router.post("/{round_id}/delete")
+def delete_round(round_id: int, db: Session = Depends(get_db)):
+    r = db.query(Round).filter(Round.id == round_id).first()
+    if r:
+        db.delete(r)
+        db.commit()
+    return RedirectResponse("/positions/", status_code=303)

ft-app/app/templates/positions.html

@@ -65,6 +65,9 @@
         <input type="hidden" name="result" value="meltdown">
         <button class="btn" style="background:var(--danger);color:#fff;font-size:0.78rem;padding:4px 14px;" onclick="return confirm('确认 {{ round.contract_code }} 熔断清仓？')">熔断</button>
       </form>
+      <form method="post" action="/positions/{{ round.id }}/delete" style="display:inline;">
+        <button style="background:none;border:none;color:var(--na);cursor:pointer;font-size:0.78rem;" onclick="return confirm('确认删除 {{ round.contract_code }} 整轮数据？')">删除</button>
+      </form>
     </span>
   </div>