v1.0.3

refactor(editor): route editor actions through commands

Replace the huge inspector system with chained editor systems for shortcut input, UI rendering, history, object mutations, save, and test actions.

Add explicit EditorCommand messages, move history handling out of EditorState, preserve pending-edit finalization before save/test/undo/redo, and keep focus loss triggering test mode through the command path.

Also add Duplicate selected, Ctrl+D, Delete, and F shortcut handling for object editing.