Merge remote-tracking branch 'origin/dev' into kai/fix/588-nested-session-guard

src/utils/percentage.ts

@@ -0,0 +1,7 @@
+/**
+ * Clamp percentage-like values to a safe 0-100 range.
+ */
+export function clampPercent(value: number): number {
+  if (!Number.isFinite(value)) return 0;
+  return Math.max(0, Math.min(100, value));
+}