refactor: remove runtime implementation from spec protocol package

Move generateTranslationSkeleton() and validateTranslationCompleteness()
out of packages/spec per spec's "no business logic" principle.

Spec retains only protocol definitions:
- StrictObjectTranslation type utility (translation-typegen.ts)
- TRANSLATE_PLACEHOLDER constant (translation-skeleton.ts)
- All existing Zod schemas (translation.zod.ts)

Runtime implementations should be re-implemented in appropriate
packages (CLI, service-i18n, metadata) in future work.

Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>

Author: Copilot

packages/spec/src/system/index.ts

@@ -43,7 +43,6 @@ export * from './notification.zod';
 export * from './translation.zod';
 export * from './translation-typegen';
 export * from './translation-skeleton';
-export * from './translation-validator';
 export * from './collaboration.zod';
 export * from './metadata-persistence.zod';
 export * from './core-services.zod';

packages/spec/src/system/translation-skeleton.test.ts

@@ -1,74 +1,22 @@
 // Copyright (c) 2025 ObjectStack. Licensed under the Apache-2.0 license.
 
-import type { ServiceObject } from '../data/object.zod';
-
 /**
- * Translation Skeleton Generator
+ * Translation Skeleton Protocol Constants
  *
- * Generates an AI-friendly JSON "fill-in-the-blank" template from an object
- * definition. The output contains `__TRANSLATE__` placeholders for every
- * translatable string, ensuring AI/human translators cannot accidentally
- * add or omit fields.
+ * Defines the placeholder convention used in AI-friendly translation
+ * skeleton templates. Runtime implementations (skeleton generation,
+ * validation) belong in implementation packages (CLI, service-i18n, etc.).
  *
  * @example
- * ```typescript
- * import { generateTranslationSkeleton } from '@objectstack/spec/system';
- * import { Task } from './objects/task.object';
- *
- * const skeleton = generateTranslationSkeleton(Task);
- * // → JSON string with __TRANSLATE__ placeholders for all 18 fields
+ * ```json
+ * {
+ *   "label": "__TRANSLATE__: \"Task\"",
+ *   "fields": {
+ *     "subject": { "label": "__TRANSLATE__: \"Subject\"" }
+ *   }
+ * }
  * ```
  */
 
-/** Placeholder prefix used in skeleton output */
+/** Placeholder prefix used in translation skeleton output */
 export const TRANSLATE_PLACEHOLDER = '__TRANSLATE__';
-
-/**
- * Generates a translation skeleton JSON string from an object definition.
- *
- * The skeleton includes:
- * - Object-level `label` and `pluralLabel`
- * - Every field with a `label` placeholder
- * - `help` placeholder for fields that have a `description`
- * - `options` map for select/multiselect fields with all option values
- *
- * @param objectDef - A parsed ServiceObject definition
- * @returns A formatted JSON string with `__TRANSLATE__` placeholders
- */
-export function generateTranslationSkeleton(objectDef: ServiceObject): string {
-  const skeleton: Record<string, unknown> = {
-    label: `${TRANSLATE_PLACEHOLDER}: "${objectDef.label}"`,
-  };
-
-  if (objectDef.pluralLabel) {
-    skeleton.pluralLabel = `${TRANSLATE_PLACEHOLDER}: "${objectDef.pluralLabel}"`;
-  }
-
-  const fieldsObj: Record<string, Record<string, unknown>> = {};
-
-  for (const [fieldName, fieldDef] of Object.entries(objectDef.fields)) {
-    const fieldEntry: Record<string, unknown> = {
-      label: `${TRANSLATE_PLACEHOLDER}: "${fieldDef.label ?? fieldName}"`,
-    };
-
-    // Add help placeholder for fields with a description
-    if (fieldDef.description) {
-      fieldEntry.help = `${TRANSLATE_PLACEHOLDER}: "${fieldDef.description}"`;
-    }
-
-    // Add options map for select/multiselect fields
-    if (fieldDef.options && fieldDef.options.length > 0) {
-      const optionsMap: Record<string, string> = {};
-      for (const opt of fieldDef.options) {
-        optionsMap[opt.value] = `${TRANSLATE_PLACEHOLDER}: "${opt.label}"`;
-      }
-      fieldEntry.options = optionsMap;
-    }
-
-    fieldsObj[fieldName] = fieldEntry;
-  }
-
-  skeleton.fields = fieldsObj;
-
-  return JSON.stringify(skeleton, null, 2);
-}