refactor(xlsform2lstsv): Group helpers into GroupHelpers struct

handleBeginGroup had 6 parameters. Bundle sanitizeName and
convertRelevance into a GroupHelpers struct; drops to 5 parameters.

Also drops an unused TypeInfo import from AppearanceHandler.

All 707 tests pass.

Author: jstet

src/pipelines/xlsform2lstsv/appearanceHandler.ts

@@ -1,5 +1,5 @@
 import { APPEARANCES } from '../../generated/Appearances.js';
-import { LSType, TypeInfo } from './typeMapper.js';
+import { LSType } from './typeMapper.js';
 
 /**
  * Surfaces appearance-attribute handling: validates against the registry

src/pipelines/xlsform2lstsv/groupEmitter.ts

@@ -13,6 +13,12 @@ import { Counters } from './counters.js';
  */
 export type GroupCounters = Counters;
 
+/** Helpers passed to handleBeginGroup for name resolution + relevance. */
+export interface GroupHelpers {
+  sanitizeName: (name: string) => string;
+  convertRelevance: (relevant?: string) => Promise<string>;
+}
+
 /**
  * Emits G (group) rows and the X-row (note) placeholders that parent-only
  * groups become. Owns the group stack, current-group pointer, and pending
@@ -182,10 +188,10 @@ export class GroupEmitter {
     row: SurveyRow,
     isMessageOnly: boolean,
     isParentOnly: boolean,
-    sanitizeName: (name: string) => string,
-    convertRelevance: (relevant?: string) => Promise<string>,
+    helpers: GroupHelpers,
     onTableList: (sanitizedName: string) => Promise<void>,
   ): Promise<void> {
+    const { sanitizeName, convertRelevance } = helpers;
     const originalName = (row.name || '').trim();
     const sanitizedName = originalName
       ? sanitizeName(originalName)

src/pipelines/xlsform2lstsv/index.ts

@@ -322,8 +322,11 @@ export class XLSFormToTSVConverter {
       row,
       this.groupProcessor.getMessageOnlyGroups().has(originalName),
       this.groupProcessor.getParentOnlyGroups().has(originalName),
-      (name) => this.fieldNameHandler.sanitizeName(name),
-      (relevant) => this.transpilerHelper.convertRelevance(relevant),
+      {
+        sanitizeName: (name) => this.fieldNameHandler.sanitizeName(name),
+        convertRelevance: (relevant) =>
+          this.transpilerHelper.convertRelevance(relevant),
+      },
       (sanitizedName) =>
         this.matrixHandler.addTableListHeader(
           row,