Settings tab gains a camera group (host/port/channel/user/masked password),
a background connection-test worker that probes one frame off the GUI
thread and shows it in a preview, and a save button that writes the
structured source to the untracked config.local.json. 60 tests pass;
Qt shell compiles and needs a Windows smoke.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Qt-free view_model builds monitor view state and isolates the settings
draft from the running config snapshot; gui.py/app.py are a thin PyQt5
shell that only renders already-decided FrameAnalysis. 39 tests pass.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>