updated rewards assignment and reward progress

frontend/src/routes/[fam]/[username]/+page.svelte

@@ -32,9 +32,9 @@
 		weekdayInTz,
 		wallClockToUtc,
 		resolveTz,
-		periodStart,
-		periodEnd,
-		isCompleteForPeriod
+		isCompleteForPeriod,
+		bonusWindow,
+		completionInWindow
 	} from '@shared/timezone';
 
 	let { data } = $props();
@@ -466,20 +466,20 @@
 				return !cfg.memberId || cfg.memberId === memberId;
 			})
 			.map((cfg) => {
-				const per = cfg.period || 'weekly';
-				const pStart = periodStart(per, paydayDay, famTz);
-				const pEnd = periodEnd(per, pStart);
+				const win = bonusWindow(cfg, paydayDay, famTz);
+				const pStart = win.from || '';
+				const pEnd = win.to || '';
 				const periodDays =
-					Math.round(
-						(new Date(pEnd + 'T00:00:00').getTime() - new Date(pStart + 'T00:00:00').getTime()) /
-							86400000
-					) + 1;
+					pStart && pEnd
+						? Math.round(
+								(new Date(pEnd + 'T00:00:00').getTime() -
+									new Date(pStart + 'T00:00:00').getTime()) /
+									86400000
+							) + 1
+						: 1;
 
 				const periodCompletions = completions.filter(
-					(c) =>
-						c.memberId === memberId &&
-						(c.date?.slice(0, 10) || c.date) >= pStart &&
-						(c.date?.slice(0, 10) || c.date) <= pEnd
+					(c) => c.memberId === memberId && completionInWindow(c, win)
 				);
 
 				// Percent thresholds are "X% of the chores done this period" — the