feat: 分离 Alpha 检查与提交限制，优化检查统计与前端展示

backend/app/submission.py

@@ -15,7 +15,7 @@ from pydantic_ai.usage import UsageLimits
 from sqlalchemy import select
 
 from .ai.provider import public_error
-from .alphas import code, sanitize, snapshot_columns, submission_condition
+from .alphas import check_summary, code, sanitize, snapshot_columns, submission_condition
 from .jobs import ACTIVE
 from .models import Account, AISettings, Alpha, Job, JobItem, SelfCorrelation, now
 from .schemas import Contract, JobOutput, valid_ids
@@ -206,6 +206,8 @@ def router(runner, ai):
             )
             return {
                 "snapshot": fingerprint(context),
+                "checks": alpha.checks,
+                "check_summary": check_summary(alpha.checks),
                 "sections": context["sections"],
                 "descriptions": {key: item["description"] for key, item in context["sections"].items()},
                 "model": config.description_model,