Stabilize editor sync and workspace navigation

[Chefski]

What changed

• stabilize CRDT projection merging and document-session ordering
• make native editor focus and toolbar visibility follow the actual text input first responder
• preserve keyboard focus across Return, insertion, merge, and block deletion
• improve page-tree selection and space-management authorization/navigation
• add focused regression coverage and regenerate the bundled CRDT runtime

Why

The editor had split focus ownership between SwiftUI, the native text view, and the view model, while concurrent CRDT projection and workspace navigation paths could lose ordering or selection state.

Validation

• strict SwiftLint
• Swift parser validation for 35 changed Swift files
• CRDT runtime: 9 Node tests
• CRDT runtime bundle regenerated successfully
• git diff --check

No local Xcode build or test run was performed, per repository instructions.

[greptile-apps]

Confidence Score: 5/5

The PR appears safe to merge, with no concrete changed-code defect identified.

The synchronization barriers, native focus lifecycle, CRDT schema updates, navigation transitions, and management authorization paths are internally consistent with their updated callers and regression coverage.

Important Files Changed

Filename	Overview
docmostly/Features/Editor/DocumentSession.swift	Adds attached-editor barriers and projection callbacks so remote updates are applied after pending local edits stabilize.
docmostly/Features/Editor/NativeEditorBodyView.swift	Coordinates native text-input focus requests with active-block state and retries focus after structural mutations.
docmostly/Features/Editor/NativeRichEditorViewModel+Collaboration.swift	Attaches editor-local synchronization barriers and direct remote projection handling to shared document sessions.
Tools/CRDTRuntime/src/docmostly-crdt-runtime.js	Extends paragraph and heading projections to preserve stable block identifiers and indentation.
docmostly/App/AppState+Navigation.swift	Simplifies sidebar selection state while retaining the independently selected workspace.
docmostly/Features/Settings/SpaceManagementAuthorization.swift	Defines consistent workspace- and space-role checks for management controls.
docmostly/Features/PageTree/PageTreeNavigationState.swift	Reconciles page-tree selection with workspace and page navigation state.

Sequence Diagram

sequenceDiagram
    participant Remote as Remote sync
    participant Session as DocumentSession
    participant Editor as Attached editor
    participant Store as Local persistence
    participant Kernel as CRDT kernel

    Remote->>Session: Receive remote update
    Session->>Editor: Await stable local-change barrier
    Editor-->>Session: Local changes integrated
    Session->>Kernel: Validate update
    Session->>Store: Append remote update
    Session->>Editor: Recheck local-change barrier
    Session->>Kernel: Apply update and capture snapshot
    Session->>Editor: Publish remote projection
    Session->>Store: Compact when required

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