feat: add BlockPathMap with incremental updates

[christianhg]

What changed

Removes the value wrapper and __inline flag from block objects and inline objects in the Slate tree. PT properties now live directly on Slate nodes.

// Before:
{ _type: 'image', _key: 'abc', children: [void-child], value: { asset: {...} }, __inline: false }

// After:
{ _type: 'image', _key: 'abc', children: [void-child], asset: {...} }

The void-child span stays in Slate's tree for cursor behavior — that's a Slate rendering concern, not a data concern. Everything else is pure PT.

Also adds BlockPathMap — an incremental key-to-path index on EditorSnapshot for O(1) block lookups.

Why

Foundation for container (nested block) support. With the tree PT-native, a container block is just an element with real children — no special wrapping, no void model to work around.

How

PT-native tree (18 files, -188 net lines):

• types/slate.ts — VoidElement replaced with ObjectElement
• values.ts — toSlateBlock/fromSlateBlock spread PT properties directly
• apply-operation-to-portable-text.ts — removed all value/__inline unwrapping
• operation-to-patches.ts — properties read directly from nodes
• applyPatch.ts — patches applied directly to nodes
• slate-plugin.schema.ts — isInline uses schema only
• render.element.tsx / render.inline-object.tsx — schema-based inline detection
• 4 operation files — insert/set/unset/delete all work with direct properties

BlockPathMap:

• snapshot.blockPathMap.get(keyPath) — returns the full Slate path
• snapshot.blockPathMap.getIndex(keyPath) — returns the block's index within its parent
• Incremental updates via applyOperation()
• blockIndexMap preserved on snapshot for backward compatibility

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Project	Deployment	Actions	Updated (UTC)
portable-text-editor-documentation	Ready	Preview, Comment	Feb 27, 2026 4:51pm
portable-text-example-basic	Ready	Preview, Comment	Feb 27, 2026 4:51pm
portable-text-playground	Ready	Preview, Comment	Feb 27, 2026 4:51pm

[changeset-bot]

🦋 Changeset detected

Latest commit: 7e3cf64

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 11 packages

Name	Type
@portabletext/editor	Minor
@portabletext/plugin-character-pair-decorator	Major
@portabletext/plugin-emoji-picker	Patch
@portabletext/plugin-input-rule	Patch
@portabletext/plugin-markdown-shortcuts	Major
@portabletext/plugin-one-line	Major
@portabletext/plugin-paste-link	Major
@portabletext/plugin-sdk-value	Major
@portabletext/plugin-typeahead-picker	Patch
@portabletext/plugin-typography	Patch
@portabletext/toolbar	Patch

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