baguette v0.1.76

Added

• Drag-and-drop file upload to the device. Add a file to a booted simulator by handing it the file — drop an app to install it, drop a photo or video to land it in Photos. Three entry points share one path: baguette install --udid <UDID> <path> (an .ipa / .app), baguette add-media --udid <UDID> <path> (an image / video), and POST /simulators/:udid/files?name=<filename> on baguette serve, which the focus page's drag-and-drop target posts raw bytes to. The domain is modelled the way the user thinks of it — not a generic file classifier but the two collections that live on a phone: Apps (install an AppBundle) and PhotoLibrary (add a MediaItem), each hanging off Simulator beside statusBar(). Classification lives on the values themselves (AppBundle.at / MediaItem.at, pure extension checks), and the serve route is a thin "which collection?" dispatcher that routes by type and refuses anything with no home on a simulator (a .pdf gets a 415, never a silent drop). Like the status bar this is a simctl path, not SimulatorHID — xcrun simctl install / addmedia run through the existing Subprocess collaborator and are fully unit-covered via MockSubprocess. The serve route stages the upload into a per-request temp dir (filename sanitised to its last path component so ?name=../… can't escape) and rejects unsupported extensions before reading the body. Known limits: single files only (zip a folder .app to .ipa for the browser; the CLI takes a real .app directly), and the drop UI is focus-mode only for now. See docs/features/file-upload.md.