[httpsphl]

The owner asked for the window, or the desktop, to show the bot's color the whole time a bot is using it (spec 24.9).

What changes

• The outline is a new window in platform/desktop/windows/outline.rs:
  • a 3 px ring (at 96 DPI) around the app's DWM frame;
  • layered with a color key, so the inside is see-through;
  • click-through, never takes focus, a tool window so it never shows in the list of windows;
  • placed right above the app in z-order, not topmost, so the owner's own window in front of the app covers it too;
  • hidden while the app is minimized, hidden or gone.
• The daemon task desktop/outline.rs, spawned in main next to the browser sweep:
  • it listens to desktop.changed (a read, a picture or an action) and bot.state;
  • it follows the window every 250 ms;
  • it hides the outline 3 s after the turn ends, after 60 s without desktop use, or on stop;
  • only one outline shows at a time: the window used last.
• The notice and the outline share a small overlay.rs facade (notice_*, outline_*). This keeps platform/desktop/mod.rs under 300 lines.

Tests

• Unit tests for when the outline shows, follows, lingers and goes, including stop/resume and two bots.
• Real window (draws a window, sends no input): the outline sits around the frame, directly above the app, follows a move, hides while the app is minimized, comes back, and hides on request.

Manual

• With a real app (Chrome, Notepad), ask a bot to read it and click something. The ring in the bot's color should appear around the window. Bring another window in front of it and the ring should be covered. When the bot finishes, the ring should go about 3 s later.