refactoring majeur (code dupliqué, mort, ...)

- Économie : ~1240 lignes de code dupliqué
- Réduction : ~60% du code modal
- Amélioration : Cohérence et maintenabilité

src/components/base/BaseModal.tsx

@@ -0,0 +1,41 @@
+import { ReactNode } from 'react';
+import { Dialog, DialogContent, DialogDescription, DialogFooter, DialogHeader, DialogTitle } from '@/components/ui/dialog';
+
+interface BaseModalProps {
+  isOpen: boolean;
+  onClose: () => void;
+  title: string | ReactNode;
+  description?: string;
+  children: ReactNode;
+  footer?: ReactNode;
+  maxWidth?: string;
+  maxHeight?: string;
+}
+
+export function BaseModal({ 
+  isOpen, 
+  onClose, 
+  title, 
+  description, 
+  children, 
+  footer,
+  maxWidth = "sm:max-w-[500px]",
+  maxHeight = "max-h-[90vh]"
+}: BaseModalProps) {
+  return (
+    <Dialog open={isOpen} onOpenChange={onClose}>
+      <DialogContent className={`${maxWidth} ${maxHeight} overflow-y-auto`}>
+        <DialogHeader>
+          <DialogTitle>{title}</DialogTitle>
+          {description && <DialogDescription>{description}</DialogDescription>}
+        </DialogHeader>
+        
+        <div className="space-y-4">
+          {children}
+        </div>
+        
+        {footer && <DialogFooter>{footer}</DialogFooter>}
+      </DialogContent>
+    </Dialog>
+  );
+}