feat: automate HAProxy cleanup and Caddy restore during sing-box uninstallation

src/core.sh

@@ -850,6 +850,24 @@ uninstall() {
     else
         ask string y "是否卸载 ${is_core_name}? [y]:"
     fi
+    # Clean up HAProxy and restore Caddy before removing files
+    if systemctl is-active --quiet haproxy >/dev/null 2>&1; then
+        systemctl stop haproxy >/dev/null 2>&1
+        systemctl disable haproxy >/dev/null 2>&1
+        if [[ $(type -P apt-get) ]]; then
+            apt-get purge -y haproxy >/dev/null 2>&1
+            apt-get autoremove -y >/dev/null 2>&1
+        elif [[ $(type -P dnf) ]]; then
+            dnf remove -y haproxy >/dev/null 2>&1
+        elif [[ $(type -P yum) ]]; then
+            yum remove -y haproxy >/dev/null 2>&1
+        fi
+    fi
+    # If Caddy is NOT being uninstalled (REPLY != '2'), we must restore Caddy back to port 443!
+    if [[ $REPLY != '2' ]]; then
+        restore_caddy_default
+    fi
+
     manage stop &>/dev/null
     manage disable &>/dev/null
     rm -rf $is_core_dir $is_log_dir $is_sh_bin ${is_sh_bin/$is_core/sb}