Koewen/dsh-window-size-lock

Windows only (binds user32.dll via koffi; inert on macOS/Linux). Remembers the DeepSeek Harness main window's size AND position: restores both on every launch (re-asserted during a grace period to beat the default layout), saves stable manual moves/resizes as the new lock, never records minimized/maximized/fullscreen states, never adopts the default rect DSH itself places the window at (so the app's own layout resets can never poison the lock), and stays on-screen when monitors change. Compatible with DSH 0.2.1-rc.3+.