[BUG] Control Panel when recording, follows mouse across screens

[mynameistito]

Description

The on screen control panel follows the mouse across different screens it should stick to the screen / window that it is recording.

Reproduction

1. start a recording (I did studio mode)
2. move mouse between different monitors

Additional Context

• Cap version: x
• Operating system, version: Windows 11
• Device (optional): PC

[linear]

CAP-663

[tembo]

Looking at the code, the root cause is in apps/desktop/src-tauri/src/windows.rs. When showing the recording controls window (InProgressRecording), the positioning uses CursorMonitorInfo::get() which gets the display containing the current cursor position rather than the display being recorded.

Relevant code at lines 865-867 and 915-917:

let recording_monitor = CursorMonitorInfo::get();
let (pos_x, pos_y) = recording_monitor.bottom_center_position(width, height, 120.0);

The CursorMonitorInfo::get() function (line 202-203) calls Display::get_containing_cursor(), which returns whichever monitor the mouse is currently on.

To fix this, the control panel should instead position itself based on the recording's capture_target display. The InProgressRecording struct in apps/desktop/src-tauri/src/recording.rs already tracks capture_target() (line 153-158) which could provide the correct display to anchor the controls to.

This issue is related to #340 which tracks various multi-monitor problems.