The Project interface has five stable regions. The selected file determines which editor and inspector appear inside them.

Region: Top bar · Responsibility: project name/menu, Previous/Next file history, tabs, project controls, notifications, account · Persisted content or UI state?: mostly session/project/external actions · MCP relationship: project/file operations exist; tab/history layout is UI-only
Region: Left sidebar · Responsibility: Files project tree or Elements visual hierarchy · Persisted content or UI state?: file/element actions persist; expansion/selection does not · MCP relationship: broad file/tree reads and mutations
Region: Center workspace · Responsibility: selected file renderer · Persisted content or UI state?: depends on file/action · MCP relationship: corresponding file tool family
Region: Right inspector · Responsibility: Design/Animate/Logic, Props, table selection, or Code · Persisted content or UI state?: edited values persist; panel/scroll does not · MCP relationship: broad but property-specific parity
Region: Bottom timeline · Responsibility: timeline layers, segments, keyframes, audio, playback · Persisted content or UI state?: authored timeline persists; panel layout/playhead may be view/runtime state · MCP relationship: timeline operations
Project menu: Dashboard and Open Home Screen.
Previous/Next: selected-file navigation history, never content Undo/Redo.
Tabs: select, close, reorder; context actions include Close/Close Other/Close Right/Close Left. Closing never deletes the file.
Ctrl/Cmd+R: reopen the most recently closed tab in the active Editor/Library view.
Editor/Library: separate tab stacks and histories.
Cloud menu: Sync Changes, Push Changes, and Template Settings.
Code menu: code preview, local/Git/npm export, npm/Website publication.
Automation and notification controls.
Account Settings currently reports not implemented.
File: Page, Component, Mockup · Center/right workspace: canvas with applicable Elements, Design/Animate/Logic, timeline
File: Code Component · Center/right workspace: Logic and Code; no visual hierarchy
File: Database/Content · Center/right workspace: Model/Data/Actions plus Column/Record/View inspector
File: Script · Center/right workspace: Logic declarations and Code
File: Document · Center/right workspace: rich-text editor
File: Document Page · Center/right workspace: route tree/SEO editor
File: API/Storage · Center/right workspace: request/state schema editors
File: Design-system/media · Center/right workspace: cards/list plus Props
File: Export/Environment · Center/right workspace: settings editors
File: Libraries/General · Center/right workspace: no ordinary selected-file center renderer
Left, right, and bottom regions can be resized. Side sizes are user preferences; double-click restores defaults. Fullscreen hides surrounding chrome for the selected workspace. These are not project content and have no production MCP equivalent.
Use file Undo for eligible selected-file content. File-system actions, sync/push, export, publishing, project selection, open tabs, and panel state have different recovery boundaries. See the full Project interface guide.