Sync main.py from blood-brain-omics repo

main.py

@@ -431,19 +431,20 @@ def h2h_blood(
     phase = "h2h_blood_withcov" if covariates == "included" else "h2h_blood"
 
     rows = q(f"""
-        SELECT target, blood_platform, {metric}
+        SELECT target, blood_platform, {metric}, n_samples
         FROM results
         WHERE phase = ? AND h2h_pair = ? AND brain_target = ? AND model = ?
         ORDER BY target
     """, [phase, pair, brain, model]).fetchall()
 
-    # Pivot: target -> {platform_a: val, platform_b: val}
+    # Pivot: target -> {platform_a: val, platform_b: val, n_samples: max(n)}
     platforms = sorted(set(r[1] for r in rows))
-    targets = {}
-    for target, platform, val in rows:
-        if target not in targets:
-            targets[target] = {}
-        targets[target][platform] = round(val, 4) if val is not None else None
+    targets: dict[str, dict] = {}
+    for target, platform, val, n_samples in rows:
+        bucket = targets.setdefault(target, {"_n": 0})
+        bucket[platform] = round(val, 4) if val is not None else None
+        if n_samples and n_samples > bucket["_n"]:
+            bucket["_n"] = n_samples
 
     return {
         "pair": pair,
@@ -451,7 +452,7 @@ def h2h_blood(
         "platforms": platforms,
         "metric": metric,
         "targets": [
-            {"target": t, **vals}
+            {"target": t, "n_samples": vals.pop("_n"), **vals}
             for t, vals in sorted(targets.items())
         ],
     }