Ticket: TINYDOC-3570 (TINYMCE-14777), TINYDOC-3561

Site: Staging

TINYMCE-14777 supersedes the tinymceai_chat_default_sources option added under TINYMCE-14703, which was removed before release. Default Chat sources are now nominated through the existing tinymceai_chat_fetch_sources option. Replaces #4306, which was closed when the branch was renamed.

Changes:

• Rewrote the tinymceai_chat_fetch_sources section in modules/ROOT/partials/configuration/tinymceai_options.adoc to cover both accepted shapes (the original array of source groups, and an object holding menu.sources plus a defaults array), the defaults semantics, and the console error cases.
• Removed the tinymceai_chat_default_sources section from modules/ROOT/partials/configuration/tinymceai_options.adoc.
• Updated the release note entry in modules/ROOT/pages/8.9.0-release-notes.adoc for TINYMCE-14777, noting that the array form still works and is not a breaking change.
• Removed tinymceai_chat_default_sources from the complete setup example in modules/ROOT/pages/tinymceai.adoc.
• Pointed the default sources cross-reference in modules/ROOT/pages/tinymceai-chat.adoc at tinymceai_chat_fetch_sources and its defaults property.

Note: the implemented shape differs from the ticket description. The ticket specifies menu: [ ...groups ], but plugins/tinymceai/src/main/ts/ui/Sources.ts on rc/8.9 defines menu: { sources: ExternalSourcesList[] }, nesting the groups one level deeper. The documented shape follows the implementation, confirmed against DefaultChatSourcesTest.ts and DemoApp.ts.

Pre-checks:

• Branch is correctly prefixed (release-note branch)
• Files have been included where required (if applicable).
• Build passes without console errors, warnings, or issues.

Review:

• Documentation Team Lead has reviewed.