Improve calendar display stability and data handling

Add robust error handling and data validation to the calendar component and API routes to prevent production crashes, specifically addressing issues with invalid publicity data and ensuring array types for fetched data.

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/FL119j1

client/src/pages/Calendar.tsx

@@ -1,6 +1,6 @@
 import { useState } from "react";
 import { useQuery, useQueryClient } from "@tanstack/react-query";
-import { ChevronLeft, ChevronRight, Plus, RefreshCw } from "lucide-react";
+import { ChevronLeft, ChevronRight, Plus, RefreshCw, Calendar as CalendarIcon } from "lucide-react";
 import { Button } from "@/components/ui/button";
 import CalendarGrid from "@/components/CalendarGrid";
 import QuickCreateMenu from "@/components/modals/QuickCreateMenu";
@@ -65,6 +65,12 @@ export default function Calendar() {
       
       const data = await response.json();
       console.log('📅 Calendar orders received:', Array.isArray(data) ? data.length : 'NOT_ARRAY', 'items');
+      
+      // Protection contre les données invalides en production
+      if (!Array.isArray(data)) {
+        console.warn('⚠️ Orders data is not an array, returning empty array');
+        return [];
+      }
       return data;
     },
   });
@@ -101,6 +107,12 @@ export default function Calendar() {
       
       const data = await response.json();
       console.log('📅 Calendar deliveries received:', Array.isArray(data) ? data.length : 'NOT_ARRAY', 'items');
+      
+      // Protection contre les données invalides en production
+      if (!Array.isArray(data)) {
+        console.warn('⚠️ Deliveries data is not an array, returning empty array');
+        return [];
+      }
       return data;
     },
   });
@@ -183,7 +195,7 @@ export default function Calendar() {
       <div className="bg-white shadow-sm border-b border-gray-200 p-6">
         <div className="flex items-center justify-between">
           <div className="flex items-center">
-            <Calendar className="w-8 h-8 text-blue-600 mr-3" />
+            <CalendarIcon className="w-8 h-8 text-blue-600 mr-3" />
             <div>
               <h2 className="text-2xl font-bold text-gray-900">
                 Calendrier des Commandes & Livraisons
@@ -259,9 +271,9 @@ export default function Calendar() {
         ) : (
           <CalendarGrid
             currentDate={currentDate}
-            orders={orders}
-            deliveries={deliveries}
-            publicities={publicities}
+            orders={orders || []}
+            deliveries={deliveries || []}
+            publicities={publicities || []}
             selectedStoreId={selectedStoreId}
             userGroups={user?.userGroups || []}
             onDateClick={handleDateClick}