fix(06): WR-03 sanitize recurrenceCount input and require finite integer >= 1

apps/pwa/src/components/EventForm.tsx

@@ -350,7 +350,13 @@ export function EventForm() {
 
     // D-06: validate recurrence bound inputs (T-06-06-input: client-side UX gate)
     if (recurrence !== 'none') {
-      if (recurrenceBound === 'count' && recurrenceCount < 1) {
+      if (
+        recurrenceBound === 'count' &&
+        (!Number.isInteger(recurrenceCount) || recurrenceCount < 1)
+      ) {
+        // WR-03: NaN < 1 is false, so a NaN count (from inputs like '' / '-' / 'e')
+        // previously bypassed this guard AND the payload spread, yielding an unbounded
+        // series. Require a finite integer ≥ 1 explicitly.
         newErrors.recurrenceBound = 'Must be at least 1 occurrence'
       } else if (recurrenceBound === 'until') {
         // WR-02: a blank end date with bound='until' must be a validation error.
@@ -939,7 +945,13 @@ export function EventForm() {
                   min={1}
                   placeholder="e.g. 10"
                   value={recurrenceCount}
-                  onChange={(e) => setRecurrenceCount(Number(e.target.value))}
+                  onChange={(e) => {
+                    // WR-03: parseInt + Number.isFinite guard. Number('') === 0 and
+                    // Number('-'/'e') === NaN both previously slipped through; coerce any
+                    // non-finite intermediate to 0 so the validate() guard catches it.
+                    const n = parseInt(e.target.value, 10)
+                    setRecurrenceCount(Number.isFinite(n) ? n : 0)
+                  }}
                   style={{
                     ...inputStyle,
                     ...(errors.recurrenceBound ? { borderColor: 'var(--color-destructive)' } : {}),