refactor: date utils and all calls

src/actions/metrics.ts

@@ -1,6 +1,7 @@
 'use server';
 
 import { MetricsService, WeeklyMetricsOverview, VelocityTrend } from '@/services/metrics';
+import { getToday } from '@/lib/date-utils';
 import { revalidatePath } from 'next/cache';
 
 /**
@@ -12,7 +13,7 @@ export async function getWeeklyMetrics(date?: Date): Promise<{
   error?: string;
 }> {
   try {
-    const targetDate = date || new Date();
+    const targetDate = date || getToday();
     const metrics = await MetricsService.getWeeklyMetrics(targetDate);
     
     return {