Update calendar to use pale yellow for planned linked orders

Change the background and text color for 'planned' orders in the calendar view from orange to pale yellow, and update the associated status indicator color.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: b163d4c0-de5e-4f4e-a9c0-aed4c7049718
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/1957c339-2757-4d1f-8e92-e9f71a1ce58e/b163d4c0-de5e-4f4e-a9c0-aed4c7049718/drT6QMF

client/src/components/CalendarGrid.tsx

@@ -25,7 +25,7 @@ function CalendarItem({ item, type, onItemClick }: { item: any, type: 'order' |
     const colorClass = item.status === 'delivered' 
       ? 'bg-delivered text-white' 
       : item.status === 'planned'
-      ? 'bg-orange-500 text-white border-2 border-orange-300'
+      ? 'bg-yellow-200 text-gray-800 border-2 border-yellow-300'
       : 'bg-primary text-white';
     
     return (
@@ -41,7 +41,7 @@ function CalendarItem({ item, type, onItemClick }: { item: any, type: 'order' |
         </span>
         <div className="flex items-center ml-1 flex-shrink-0">
           {item.status === 'planned' && (
-            <span className="w-2 h-2 bg-yellow-300 mr-1" title="Commande planifiée (liée à une livraison)" />
+            <span className="w-2 h-2 bg-yellow-600 mr-1" title="Commande planifiée (liée à une livraison)" />
           )}
           {item.status === 'delivered' && (
             <Check className="w-3 h-3" />