fix: add migration to change green/red/threshold from INTEGER to BIGINT

web/components/ChartCard/usePlot.ts

@@ -57,11 +57,11 @@ export function usePlot(
 
       // Defer mouseleave — prevents React hydration events firing before lastIdxRef set
       requestAnimationFrame(() => {
-        plot.over.onmouseleave = () => {
+        plot.over.addEventListener('mouseleave', () => {
           const p = plotRef.current;
           if (!p) return;
           p.setCursor({ left: idxToPixel(p, lastIdxRef.current), top: -10 });
-        };
+        });
       });
     }
     // deps is intentionally dynamic — passed by parent to allow external rebuild triggers

web/migrations/004_add_bigint_signals.js

@@ -0,0 +1,12 @@
+/** @type {import('node-pg-migrate').MigrationBuilder} */
+exports.up = (pgm) => {
+  pgm.sql(`ALTER TABLE signals ALTER COLUMN green TYPE bigint`);
+  pgm.sql(`ALTER TABLE signals ALTER COLUMN red TYPE bigint`);
+  pgm.sql(`ALTER TABLE alerts ALTER COLUMN threshold TYPE bigint`);
+};
+
+exports.down = (pgm) => {
+  pgm.sql(`ALTER TABLE alerts ALTER COLUMN threshold TYPE integer`);
+  pgm.sql(`ALTER TABLE signals ALTER COLUMN red TYPE integer`);
+  pgm.sql(`ALTER TABLE signals ALTER COLUMN green TYPE integer`);
+};