feat: backfill missing PnL for submitted alphas

backend/app/business.py

@@ -10,7 +10,7 @@ from uuid import uuid4
 from fastapi import HTTPException
 from sqlalchemy import delete, func, select, update
 
-from .alphas import list_statement, sorted_statement, summary
+from .alphas import list_statement, sorted_statement, submission_condition, summary
 from .jobs import ACTIVE
 from .models import Account, Alpha, Job, JobItem, Pnl, Research, ResearchTag, SelfCorrelation, now
 from .research.provenance import alpha_sources, source_kinds
@@ -203,9 +203,22 @@ class Business:
         for job in (
             await self.db.scalars(select(Job).where(Job.kind == body.kind, Job.status.in_(ACTIVE)))
         ).all():
-            if job.payload == payload:
+            if body.kind == "pnl_backfill" or job.payload == payload:
                 return JobOutput.model_validate(job).model_dump(mode="json")
         job = Job(id=str(uuid4()), kind=body.kind, payload=payload)
+        if body.kind == "pnl_backfill":
+            # Fix the full missing set on the server, independently of UI paging.
+            # The account lock above also serializes duplicate button clicks.
+            ids = list((await self.db.scalars(
+                select(Alpha.id)
+                .outerjoin(Pnl, Pnl.alpha_id == Alpha.id)
+                .where(submission_condition("SUBMITTED"), Pnl.alpha_id.is_(None))
+                .order_by(Alpha.id)
+            )).all())
+            job.payload = {"alpha_ids": ids, "submission": "SUBMITTED"}
+            job.total = len(ids)
+            if not ids:
+                job.status = "completed"
         self.db.add(job)
         await self.db.flush()
         return JobOutput.model_validate(job).model_dump(mode="json")