Feature/texta selection

[frouaix]

Description

Brief description of changes.

Type of Change

• Bug fix
• New feature
• Documentation update
• Refactoring
• Build/tooling change

Validation

• pnpm build passes
• pnpm build:examples passes
• Manual verification completed (if applicable)

Checklist

• Code follows project conventions
• Documentation updated if needed
• No unrelated changes included

[Copilot]

Pull request overview

Adds selection-geometry support for custom blocks so the GUI text-selection system can work with texta() blocks (in addition to regular text()), and provides a demo/debug page plus a regression test.

Changes:

• Extend the custom block registry API with getSelectionGeometry and wire it into the GUI CharacterBoundsAdapter.
• Implement getSelectionGeometry for texta() by computing per-unit character bounds as part of texta layout.
• Add a Texta selection debug demo page, update navigation/docs, and add a Vitest regression test.

Reviewed changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
packages/texta/test/vitrine-selection.test.ts	Adds a regression test asserting selection bounds work for both text() and texta() blocks.
packages/texta/src/vitrine.ts	Implements Texta selection geometry and refactors layout to include per-unit bounds.
packages/gui/src/selection/character-bounds-adapter.ts	Adapts selection bounds extraction to include custom blocks via the block registry.
packages/core/src/core/block-registry.ts	Adds CustomBlockSelectionApi / CustomBlockSelectionGeometry and getSelectionGeometry handler hook.
packages/core/src/index.ts	Re-exports the new selection-related registry types.
packages/demo/vite.config.ts	Registers a new demo entrypoint for Texta selection debugging.
packages/demo/text-selection-debug.html	Updates navigation to link to the new Texta debug page.
packages/demo/text-selection-debug-texta.html	New Texta selection debug page.
packages/demo/text-selection-debug-texta.css	Styling for the new Texta selection debug page.
packages/demo/text-selection-debug-texta-setup.js	Mounts the debug component and logs hit-test/selection info.
packages/demo/text-selection-debug-texta-scene.js	Builds a scene of varied texta() blocks to stress selection/hit-testing.
packages/demo/component-demo.html	Clarifies the existing text selection debug link label.
docs/TEXT_SELECTION_REGULAR_TEXT.md	Updates scope docs to include custom-block selection geometry (including Texta).

Comments suppressed due to low confidence (1)

packages/texta/src/vitrine.ts:9

• measureText and calculateTextOffset are imported from vitrine but no longer used in this module. With noUnusedLocals/linting enabled this will fail CI; please remove the unused imports (or switch back to using them).

import {
  customBlock,
  registerBlockType,
  measureText,
  calculateTextOffset,
  SF_TEXT_ADVANCE_APPROX_DEFAULT
} from 'vitrine';

[Copilot]

Pull request overview

Copilot reviewed 16 out of 16 changed files in this pull request and generated 2 comments.

[Copilot]

Pull request overview

Copilot reviewed 16 out of 16 changed files in this pull request and generated 1 comment.