Custom title bar: on Windows and Linux the application bar is the window's title bar (drag to move with OS snapping, double-click to maximize or restore, minimize/maximize/close buttons, resize from the edges and corners); macOS keeps its traffic lights over the bar; the web build has no window buttons; ui.window control method (adapted from VectorCraft)

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01AS5Tn3xieewUSg3uxrMVdL

docs/control-protocol.md

@@ -38,6 +38,7 @@ Commands never open dialogs when run this way. `solvecraft-cli commands` prints
 | `ui.text` | `text` | typed text |
 | `ui.screenshot` | `path?` | PNG of the window (needs a presented frame) |
 | `ui.render` | `path`, `width?`, `height?` | CPU render of the model with the current camera (no window needed) |
+| `ui.window` | `action`: minimize, maximize, restore, toggle, close | what the title bar's caption buttons do (on Windows and Linux the application bar is the title bar) |
 | `ui.resize` | `width`, `height` | |
 | `app.quit` | — | |