refactor(cli): dedupe configure section parsing

src/cli/program/register.configure.ts

@@ -3,6 +3,7 @@ import {
   CONFIGURE_WIZARD_SECTIONS,
   configureCommand,
   configureCommandWithSections,
+  parseConfigureWizardSections,
 } from "../../commands/configure.js";
 import { defaultRuntime } from "../../runtime.js";
 import { formatDocsLink } from "../../terminal/links.js";
@@ -26,17 +27,12 @@ export function registerConfigureCommand(program: Command) {
     )
     .action(async (opts) => {
       await runCommandWithRuntime(defaultRuntime, async () => {
-        const sections: string[] = Array.isArray(opts.section)
-          ? opts.section
-              .map((value: unknown) => (typeof value === "string" ? value.trim() : ""))
-              .filter(Boolean)
-          : [];
+        const { sections, invalid } = parseConfigureWizardSections(opts.section);
         if (sections.length === 0) {
           await configureCommand(defaultRuntime);
           return;
         }
 
-        const invalid = sections.filter((s) => !CONFIGURE_WIZARD_SECTIONS.includes(s as never));
         if (invalid.length > 0) {
           defaultRuntime.error(
             `Invalid --section: ${invalid.join(", ")}. Expected one of: ${CONFIGURE_WIZARD_SECTIONS.join(", ")}.`,