Correction suite à test Shellchhek

Line 47:
    [[ $SSH_PORT =~ ^[0-9]+$ ]] && (( SSH_PORT >= 1 && SSH_PORT <= 65535 )) \
                                ^-- [SC2015](https://www.shellcheck.net/wiki/SC2015) (info): Note that A && B || C is not if-then-else. C may run when A is true.

post-install_Claude.sh

@@ -44,8 +44,9 @@ EOF
 check_prerequisites() {
     [[ $EUID -eq 0 ]] || die "Ce script doit être exécuté en root (sudo)."
     [[ -r /etc/debian_version ]] || die "Ce script est prévu pour Debian."
-    [[ $SSH_PORT =~ ^[0-9]+$ ]] && (( SSH_PORT >= 1 && SSH_PORT <= 65535 )) \
-        || die "Port SSH invalide : ${SSH_PORT}"
+    if ! [[ $SSH_PORT =~ ^[0-9]+$ ]] || (( SSH_PORT < 1 || SSH_PORT > 65535 )); then
+        die "Port SSH invalide : ${SSH_PORT}"
+    fi
 }
 
 # --- Étapes ---