clamp window dragging to the screen; drop the coloured per-app tiles in the taskbar

opencode.md

@@ -223,11 +223,11 @@ list reordering, not free placement. Don't confuse the two.
   `eslint-disable-next-line` with a comment. Don't add more without a reason.
 - Watch for `pointercancel`: any custom pointer gesture over an `<img>`, link,
   or text selection needs `draggable=false` / `user-select: none`.
-- Windows must fit the viewport: `openAppDef` / `resizeWin` clamp `w`/`h` in
-  `WindowsDesktop.tsx`, a `resize` effect re-clamps on browser resize, and
+- Windows must stay on-screen: `openAppDef` / `resizeWin` clamp `w`/`h`,
+  `moveWin` clamps `x`/`y` (dragging can't push a window off any edge or under
+  the panel), a `resize` effect re-clamps on browser resize, and
   `.win-window.centered` carries `max-width`/`max-height`. Keep these in sync if
-  you add a new window-open path, or windows will open off-screen on a small
-  monitor.
+  you add a new window path, or windows will escape the viewport.
 - Exposing the **dev** server over a tunnel needs the tunnel host in
   `allowedDevOrigins` (`next.config.ts`). Without it Next dev rejects the
   cross-origin HMR WebSocket, so the client never hydrates — the page is SSR