fix(ui): stream polar plot updates as sweep progresses

Call upsertPolar after each successful point instead of only after the
full sweep completes, so the polar chart populates live.

Made-with: Cursor

Author: aeronauty

flexfoil-ui/src/components/panels/SolvePanel.tsx

@@ -612,13 +612,15 @@ export function SolvePanel() {
         if (res && fromCache) {
           points.push({ alpha: roundedAlpha, cl: res.cl ?? 0, cd: res.cd ?? 0, cm: res.cm ?? 0 });
           hits++;
+          upsertPolar({ key: polarKey, label: polarLabel, points: [...points] });
           continue;
         }
 
         if (res) {
           misses++;
           if (res.success) {
             points.push({ alpha: roundedAlpha, cl: res.cl, cd: res.cd, cm: res.cm });
+            upsertPolar({ key: polarKey, label: polarLabel, points: [...points] });
           } else {
             failures++;
             appendEvent(caseId, {