[ruibaby]

Summary

Single page tools were missing the excerpt fields that post tools already support. As a result, AI clients using halo_create_single_page / halo_update_single_page could not set a manual excerpt or control automatic excerpt generation, and halo_get_single_page / halo_list_single_pages did not expose excerptRaw or autoGenerateExcerpt.

This change aligns single pages with posts:

• halo_create_single_page and halo_update_single_page now accept excerpt and autoGenerateExcerpt.
• Providing excerpt defaults autoGenerateExcerpt to false; providing only autoGenerateExcerpt preserves the existing manual excerpt; omitting both keeps current behavior.
• Single page payloads now include excerptRaw and autoGenerateExcerpt alongside the rendered excerpt.

Validation

• ./gradlew spotlessCheck test
• Added unit tests covering manual excerpt creation, metadata-only excerpt updates, and toggling automatic generation while keeping the manual excerpt.