fix(streamlit): Fix ash shell compatibility for nested functions

- Move nested functions outside parent functions (ash doesn't support local functions)
- Fix _build_instance_entry and _print_instance_json syntax

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

package/secubox/secubox-app-streamlit/files/usr/sbin/streamlitctl

@@ -268,9 +268,8 @@ STARTUP
 }
 
 # Build instances string from UCI config
-build_instances_string() {
-	local instances=""
-	local _add_instance() {
+_instances_result=""
+_build_instance_entry() {
 	local section="$1"
 	local inst_enabled inst_app inst_port
 	config_get inst_enabled "$section" enabled "0"
@@ -278,13 +277,16 @@ build_instances_string() {
 	config_get inst_port "$section" port ""
 
 	if [ "$inst_enabled" = "1" ] && [ -n "$inst_app" ] && [ -n "$inst_port" ]; then
-			[ -n "$instances" ] && instances="${instances},"
-			instances="${instances}${inst_app}:${inst_port}"
+		[ -n "$_instances_result" ] && _instances_result="${_instances_result},"
+		_instances_result="${_instances_result}${inst_app}:${inst_port}"
 	fi
 }
+
+build_instances_string() {
+	_instances_result=""
 	config_load "$CONFIG"
-	config_foreach _add_instance instance
-	echo "$instances"
+	config_foreach _build_instance_entry instance
+	echo "$_instances_result"
 }
 
 # Create LXC config
@@ -740,13 +742,8 @@ cmd_service_stop() {
 }
 
 # Instance management
-cmd_instance_list() {
-	load_config
-	echo "{"
-	echo '  "instances": ['
-
-	local first=1
-	_list_instance() {
+_instance_list_first=1
+_print_instance_json() {
 	local section="$1"
 	local name app port enabled
 	config_get name "$section" name "$section"
@@ -754,13 +751,20 @@ cmd_instance_list() {
 	config_get port "$section" port ""
 	config_get enabled "$section" enabled "0"
 
-		[ $first -eq 0 ] && echo ","
-		first=0
+	[ "$_instance_list_first" -eq 0 ] && echo ","
+	_instance_list_first=0
 	printf '    {"id": "%s", "name": "%s", "app": "%s", "port": "%s", "enabled": %s}' \
 		"$section" "$name" "$app" "$port" "$([ "$enabled" = "1" ] && echo "true" || echo "false")"
 }
+
+cmd_instance_list() {
+	load_config
+	echo "{"
+	echo '  "instances": ['
+
+	_instance_list_first=1
 	config_load "$CONFIG"
-	config_foreach _list_instance instance
+	config_foreach _print_instance_json instance
 	echo ""
 	echo "  ]"
 	echo "}"