Implemented the image-caption restriction so captions remain inline rich text only and no longer expose block-insertion UI or slash commands.

Files touched

• frontend/packages/editor/src/inline-add-block-button.tsx

• frontend/packages/editor/src/blocknote/core/extensions/SlashMenu/SlashMenuPlugin.ts

• frontend/packages/editor/src/blocknote/core/shared/plugins/suggestion/SuggestionPlugin.ts

• frontend/packages/editor/src/inline-add-block-button.test.tsx

• frontend/packages/editor/src/blocknote/core/__tests__/slash-menu-caption-guards.test.ts

Main objects changed

• InlineAddBlockButton

  • Added a guard so the floating Insert Block button does not render when selection is inside an image caption.

• isSlashMenuEnabled

  • Added as a shared helper in SlashMenuPlugin.ts to centralize whether slash commands are allowed in the current selection context.

• SlashMenuProsemirrorPlugin

  • Wired the new guard into slash-menu activation so / does not open the menu inside image captions.

• setupSuggestionsMenu

  • Extended with an optional isEnabled context guard.

  • Prevents activation in blocked contexts and closes the menu if selection moves into one.

Behavior delivered

• Image captions do not show the Insert Block button.

• The slash menu is disabled inside image captions.

• Captions stay inline rich text only; no schema rewrite was introduced.

Tests added

• inline-add-block-button.test.tsx

  • Verifies the button appears in a normal empty paragraph.

  • Verifies the button is hidden inside an image caption.

• slash-menu-caption-guards.test.ts

  • Verifies slash menu works in normal paragraphs.

  • Verifies slash menu is blocked inside image captions.

  • Verifies an active slash menu closes when selection moves into a caption.

Notes

• No schema/content-model change was made.

• Existing plain-text caption behavior was preserved.

• Full local validation was blocked in this environment because frontend dependencies were not installed.