(#9400 P1b) configuration: interactive: replace eval with declare -g

Two eval calls in set_interactive_config_value():
- eval "$1"='$2' → declare -g "${1}=${2}"
- eval "ARMBIAN_INTERACTIVE_CONFIGS[${1}]"='$2' → direct array assignment

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

lib/functions/configuration/interactive.sh

@@ -30,8 +30,8 @@ function interactive_config_prepare_terminal() {
 # $1: variable name
 # $2: variable value
 function set_interactive_config_value() {
-	eval "$1"='$2'
-	eval "ARMBIAN_INTERACTIVE_CONFIGS[${1}]"='$2'
+	declare -g "${1}=${2}"
+	ARMBIAN_INTERACTIVE_CONFIGS["${1}"]="${2}"
 }
 
 function interactive_finish() {