add fix for predict

server.js

@@ -156,7 +156,7 @@ app.post("/api/state", (req, res) => {
 });
 
 app.post("/api/passings", (req, res) => {
-  const { sessionId, passing } = req.body || {};
+  const { sessionId, passing, sessionResult } = req.body || {};
   if (!sessionId || !passing || typeof passing !== "object") {
     res.status(400).json({ error: "Expected { sessionId, passing }" });
     return;
@@ -196,6 +196,33 @@ app.post("/api/passings", (req, res) => {
     new Date().toISOString()
   );
 
+  // Keep app_state hot for overlay clients that hydrate from backend instead of
+  // having their own direct decoder socket.
+  if (sessionResult && typeof sessionResult === "object") {
+    const nowIso = new Date().toISOString();
+    const row = db.prepare("SELECT state_json FROM app_state WHERE id = 1").get();
+    if (row?.state_json) {
+      try {
+        const parsed = JSON.parse(row.state_json);
+        if (!parsed.resultsBySession || typeof parsed.resultsBySession !== "object") {
+          parsed.resultsBySession = {};
+        }
+        parsed.resultsBySession[String(sessionId)] = sessionResult;
+        db.prepare(
+          `
+            INSERT INTO app_state (id, state_json, updated_at)
+            VALUES (1, ?, ?)
+            ON CONFLICT(id) DO UPDATE SET
+              state_json = excluded.state_json,
+              updated_at = excluded.updated_at
+          `
+        ).run(JSON.stringify(parsed), nowIso);
+      } catch {
+        // leave app_state untouched if the stored JSON is invalid
+      }
+    }
+  }
+
   res.json({ ok: true });
 });