refactor: date utils and all calls

src/app/api/daily/route.ts

@@ -1,5 +1,6 @@
 import { NextResponse } from 'next/server';
 import { dailyService } from '@/services/daily';
+import { getToday, parseDate, isValidAPIDate } from '@/lib/date-utils';
 
 /**
  * API route pour récupérer la vue daily (hier + aujourd'hui)
@@ -32,13 +33,18 @@ export async function GET(request: Request) {
     }
     
     // Vue daily pour une date donnée (ou aujourd'hui par défaut)
-    const targetDate = date ? new Date(date) : new Date();
+    let targetDate: Date;
     
-    if (date && isNaN(targetDate.getTime())) {
-      return NextResponse.json(
-        { error: 'Format de date invalide. Utilisez YYYY-MM-DD' },
-        { status: 400 }
-      );
+    if (date) {
+      if (!isValidAPIDate(date)) {
+        return NextResponse.json(
+          { error: 'Format de date invalide. Utilisez YYYY-MM-DD' },
+          { status: 400 }
+        );
+      }
+      targetDate = parseDate(date);
+    } else {
+      targetDate = getToday();
     }
     
     const dailyView = await dailyService.getDailyView(targetDate);

src/app/daily/DailyPageClient.tsx

@@ -10,7 +10,7 @@ import { DailyCalendar } from '@/components/daily/DailyCalendar';
 import { DailySection } from '@/components/daily/DailySection';
 import { dailyClient } from '@/clients/daily-client';
 import { Header } from '@/components/ui/Header';
-import { getPreviousWorkday } from '@/lib/workday-utils';
+import { getPreviousWorkday, formatDateLong, isToday, generateDateTitle, formatDateShort, isYesterday } from '@/lib/date-utils';
 
 interface DailyPageClientProps {
   initialDailyView?: DailyView;
@@ -112,37 +112,23 @@ export function DailyPageClient({
   };
 
   const formatCurrentDate = () => {
-    return currentDate.toLocaleDateString('fr-FR', {
-      weekday: 'long',
-      year: 'numeric',
-      month: 'long',
-      day: 'numeric'
-    });
+    return formatDateLong(currentDate);
   };
 
-  const isToday = () => {
-    const today = new Date();
-    return currentDate.toDateString() === today.toDateString();
+  const isTodayDate = () => {
+    return isToday(currentDate);
   };
 
   const getTodayTitle = () => {
-    const today = new Date();
-    if (currentDate.toDateString() === today.toDateString()) {
-      return "🎯 Aujourd'hui";
-    }
-    return `🎯 ${currentDate.toLocaleDateString('fr-FR', { day: '2-digit', month: '2-digit', year: '2-digit' })}`;
+    return generateDateTitle(currentDate, '🎯');
   };
 
   const getYesterdayTitle = () => {
-    const today = new Date();
-    const yesterday = new Date(today);
-    yesterday.setDate(yesterday.getDate() - 1);
-    
     const yesterdayDate = getYesterdayDate();
-    if (yesterdayDate.toDateString() === yesterday.toDateString()) {
+    if (isYesterday(yesterdayDate)) {
       return "📋 Hier";
     }
-    return `📋 ${yesterdayDate.toLocaleDateString('fr-FR', { day: '2-digit', month: '2-digit', year: '2-digit' })}`;
+    return `📋 ${formatDateShort(yesterdayDate)}`;
   };
 
   if (loading) {
@@ -198,7 +184,7 @@ export function DailyPageClient({
               <div className="text-sm font-bold text-[var(--foreground)] font-mono">
                 {formatCurrentDate()}
               </div>
-              {!isToday() && (
+              {!isTodayDate() && (
                 <button
                   onClick={goToToday}
                   className="text-xs text-[var(--primary)] hover:text-[var(--primary)]/80 font-mono"