Fix: Conversion complète vers PrimeReact et corrections build

CONVERSIONS UI (8 pages):
✅ Remplacement de tous les composants Shadcn/UI par PrimeReact
- Card, Button, Input, Textarea, Badge → Card, Button, InputText, InputTextarea, Tag
- Conversion de toutes les icônes lucide-react en primeicons

Pages converties:
- app/(main)/aide/page.tsx
- app/(main)/aide/documentation/page.tsx
- app/(main)/aide/tutoriels/page.tsx
- app/(main)/aide/support/page.tsx
- app/(main)/messages/page.tsx
- app/(main)/messages/nouveau/page.tsx
- app/(main)/messages/envoyes/page.tsx
- app/(main)/messages/archives/page.tsx

CORRECTIONS BUILD:
✅ Résolution des conflits de dépendances FullCalendar
- @fullcalendar/core: 6.1.4 → ^6.1.19
- Alignement avec daygrid, timegrid, interaction, react

✅ Correction des erreurs TypeScript
- DataTable: Ajout de selectionMode="multiple"
- InputText number: Conversion number → string avec .toString()

✅ Correction des services API (3 fichiers)
- fournisseurService.ts
- notificationService.ts
- userService.ts
- Remplacement des appels apiService.get() par axios direct
- Ajout du préfixe /api/v1/ à tous les endpoints
- Configuration d'interceptors pour authentication tokens

RÉSULTAT:
✅ Build réussi: 126 pages générées
✅ 0 erreurs de compilation
✅ 0 erreurs TypeScript
✅ Architecture cohérente avec PrimeReact

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

app/(main)/messages/nouveau/page.tsx

@@ -1,12 +1,10 @@
 "use client";
 
 import React, { useState } from "react";
-import { Card } from "@/components/ui/card";
-import { Button } from "@/components/ui/button";
-import { Input } from "@/components/ui/input";
-import { Textarea } from "@/components/ui/textarea";
-import { Label } from "@/components/ui/label";
-import { Send, Paperclip, X, ArrowLeft } from "lucide-react";
+import { Card } from "primereact/card";
+import { Button } from "primereact/button";
+import { InputText } from "primereact/inputtext";
+import { InputTextarea } from "primereact/inputtextarea";
 import Link from "next/link";
 import { useRouter } from "next/navigation";
 
@@ -48,8 +46,8 @@ export default function NouveauMessagePage() {
       <div className="flex items-center justify-between">
         <div className="flex items-center gap-4">
           <Link href="/messages">
-            <Button variant="ghost" size="sm">
-              <ArrowLeft className="h-4 w-4 mr-2" />
+            <Button text size="small">
+              <i className="pi pi-arrow-left mr-2"></i>
               Retour
             </Button>
           </Link>
@@ -63,61 +61,61 @@ export default function NouveauMessagePage() {
       <Card className="p-6">
         <form onSubmit={handleSubmit} className="space-y-6">
           <div>
-            <Label htmlFor="destinataire">Destinataire *</Label>
-            <Input
+            <label htmlFor="destinataire" className="block mb-2">Destinataire *</label>
+            <InputText
               id="destinataire"
               type="email"
               placeholder="email@exemple.com"
               value={destinataire}
               onChange={(e) => setDestinataire(e.target.value)}
               required
-              className="mt-2"
+              className="w-full"
             />
           </div>
 
           <div>
-            <Label htmlFor="sujet">Sujet *</Label>
-            <Input
+            <label htmlFor="sujet" className="block mb-2">Sujet *</label>
+            <InputText
               id="sujet"
               type="text"
               placeholder="Objet du message"
               value={sujet}
               onChange={(e) => setSujet(e.target.value)}
               required
-              className="mt-2"
+              className="w-full"
             />
           </div>
 
           <div>
-            <Label htmlFor="message">Message *</Label>
-            <Textarea
+            <label htmlFor="message" className="block mb-2">Message *</label>
+            <InputTextarea
               id="message"
               placeholder="Tapez votre message ici..."
               value={message}
               onChange={(e) => setMessage(e.target.value)}
               required
               rows={12}
-              className="mt-2"
+              className="w-full"
             />
           </div>
 
           <div>
-            <Label>Pièces jointes</Label>
-            <div className="mt-2 space-y-2">
+            <label className="block mb-2">Pièces jointes</label>
+            <div className="space-y-2">
               {fichiers.map((file, index) => (
                 <div
                   key={index}
                   className="flex items-center gap-2 p-2 bg-gray-50 rounded"
                 >
-                  <Paperclip className="h-4 w-4 text-gray-400" />
+                  <i className="pi pi-paperclip text-gray-400"></i>
                   <span className="text-sm flex-1">{file.name}</span>
                   <Button
                     type="button"
-                    variant="ghost"
-                    size="sm"
+                    text
+                    size="small"
                     onClick={() => removeFile(index)}
                   >
-                    <X className="h-4 w-4" />
+                    <i className="pi pi-times"></i>
                   </Button>
                 </div>
               ))}
@@ -130,10 +128,10 @@ export default function NouveauMessagePage() {
               />
               <Button
                 type="button"
-                variant="outline"
+                outlined
                 onClick={() => document.getElementById("file-upload")?.click()}
               >
-                <Paperclip className="mr-2 h-4 w-4" />
+                <i className="pi pi-paperclip mr-2"></i>
                 Ajouter une pièce jointe
               </Button>
             </div>
@@ -145,11 +143,11 @@ export default function NouveauMessagePage() {
               className="bg-blue-600 hover:bg-blue-700"
               disabled={isSubmitting}
             >
-              <Send className="mr-2 h-4 w-4" />
+              <i className="pi pi-send mr-2"></i>
               {isSubmitting ? "Envoi en cours..." : "Envoyer"}
             </Button>
             <Link href="/messages">
-              <Button type="button" variant="outline">
+              <Button type="button" outlined>
                 Annuler
               </Button>
             </Link>