feat: add scoped alpha sync and local self-correlation

backend/tests/browser_server.py

@@ -45,7 +45,7 @@ def sample(index):
         "selection": {"code": "self_correlation < 0.5"} if super_alpha else None,
         "combo": {"code": "alpha"} if super_alpha else None,
         "settings": {
-            "region": ["USA", "CHN", "EUR"][index % 3],
+            "region": ["USA", "CHN", "EUR"][(index // 3) % 3],
             "universe": "TOP3000",
             "language": language,
             "delay": 1,
@@ -64,7 +64,10 @@ def sample(index):
             "checks": [{"name": "LOW_SHARPE", "result": "PASS", "value": 2.1, "limit": 1.58}],
         },
         "os": {"sharpe": 1.1} if index % 3 == 0 else None,
-        "dateCreated": (datetime(2025, 1, 1, tzinfo=timezone.utc) + timedelta(days=index)).isoformat(),
+        "dateCreated": (datetime(2025, 1, 1, tzinfo=timezone.utc) + timedelta(seconds=index)).isoformat(),
+        "dateSubmitted": (datetime(2025, 2, 1, tzinfo=timezone.utc) + timedelta(days=index % 2)).isoformat()
+        if index % 3 == 0
+        else None,
     }
 
 
@@ -141,6 +144,21 @@ def create_test_app():
             matched = [
                 r for r in records if (r["status"] == "UNSUBMITTED") == unsubmitted and r["hidden"] == hidden
             ]
+            for field in ("dateCreated", "dateSubmitted"):
+                for suffix in (">=", "<"):
+                    boundary = request.url.params.get(field + suffix)
+                    if boundary:
+                        bound = datetime.fromisoformat(boundary).replace(tzinfo=timezone.utc)
+                        matched = [
+                            r
+                            for r in matched
+                            if r.get(field)
+                            and (
+                                datetime.fromisoformat(r[field]) >= bound
+                                if suffix == ">="
+                                else datetime.fromisoformat(r[field]) < bound
+                            )
+                        ]
             offset, limit = (
                 int(request.url.params.get("offset", 0)),
                 int(request.url.params.get("limit", 100)),