feat(word-templates): add company pools, template cloning, typed categories, and placeholder display

- TemplateCategory union type (8 values) replacing plain string
- Company-specific filtering in template list
- Template cloning with clone badge indicator
- Placeholder display ({{VARIABLE}} markers) in card and form
- Delete confirmation dialog
- updatedAt timestamp support

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/modules/word-templates/index.ts

@@ -1,3 +1,3 @@
 export { wordTemplatesConfig } from './config';
 export { WordTemplatesModule } from './components/word-templates-module';
-export type { WordTemplate } from './types';
+export type { WordTemplate, TemplateCategory } from './types';