fix: use uppercase role values in profile page quick actions

Change role comparisons from lowercase to uppercase to match User type:
- "client" → "CLIENT"
- "employee" → "EMPLOYEE"
- "admin" → "ADMIN"

The User type only defines uppercase role values.

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

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

app/profil/page.tsx

@@ -240,7 +240,7 @@ export default function ProfilePage() {
               <CardTitle>Actions rapides</CardTitle>
             </CardHeader>
             <CardContent className="space-y-2">
-              {user.role === "client" && (
+              {user.role === "CLIENT" && (
                 <>
                   <Button
                     variant="outline"
@@ -258,7 +258,7 @@ export default function ProfilePage() {
                   </Button>
                 </>
               )}
-              {user.role === "employee" && (
+              {user.role === "EMPLOYEE" && (
                 <Button
                   variant="outline"
                   fullWidth
@@ -267,7 +267,7 @@ export default function ProfilePage() {
                   Tableau de bord
                 </Button>
               )}
-              {user.role === "admin" && (
+              {user.role === "ADMIN" && (
                 <Button
                   variant="outline"
                   fullWidth