forked from 1b-agent/opencadstudio-upstream
Selecting a block and running BEDIT (command, ribbon button, or a double-click on the block) opens a block-editor "space" tab, named after the block, alongside Model/Layout in the status bar. The tab draws ONLY the block record's own entities in block-local coordinates; edits are live on the definition, so every INSERT updates. Save Block / Discard buttons (side toolbar) finish the session; Discard restores the on-entry snapshot. Space switching is locked while a block is open, and BEDIT and REFEDIT are mutually exclusive. Implementation: a Scene.block_edit_block override at the top of current_layout_block_handle scopes render/pick/new-entity ownership to the edited block while current_layout stays "Model" (so the pervasive Model-vs-paper code keeps model behaviour). The model render/pick paths that hardcoded model_space_block_handle (wire tile set, hatch render + pick, block-instance meshes) are made binding-aware so the block isolation actually takes effect and model content does not leak in. Entering fits the camera to the block (fit_all already scopes via the binding). Renaming the block tab renames the block itself — new Scene::rename_block re-keys the record, updates the Block marker and repoints every INSERT reference. Co-Authored-By: Claude Opus 4.8 <[email protected]>