fix(rpcd): Wrap call handlers in function for BusyBox ash local keyword compatibility

BusyBox ash rejects `local` outside a function. Both RPCD handlers used
`local` directly in the case block, causing "not in a function" errors
and silent RPC failures (empty responses).

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

package/secubox/luci-app-device-intel/root/usr/libexec/rpcd/luci.device-intel

@@ -40,7 +40,8 @@ case "$1" in
 		;;
 
 	call)
-		case "$2" in
+		handle_call() {
+		case "$1" in
 			get_devices)
 				. "${DI_LIB}/functions.sh"
 				local devices=$(di_get_devices)
@@ -239,10 +240,12 @@ case "$1" in
 			*)
 				json_init
 				json_add_boolean "error" 1
-				json_add_string "message" "Unknown method: $2"
+				json_add_string "message" "Unknown method: $1"
 				json_dump
 				;;
 		esac
+		}
+		handle_call "$2"
 		;;
 esac
 

package/secubox/luci-app-dns-provider/root/usr/libexec/rpcd/luci.dns-provider

@@ -39,7 +39,8 @@ case "$1" in
 		;;
 
 	call)
-		case "$2" in
+		handle_call() {
+		case "$1" in
 			get_config)
 				json_init
 
@@ -241,10 +242,12 @@ case "$1" in
 			*)
 				json_init
 				json_add_boolean "error" 1
-				json_add_string "message" "Unknown method: $2"
+				json_add_string "message" "Unknown method: $1"
 				json_dump
 				;;
 		esac
+		}
+		handle_call "$2"
 		;;
 esac