MainWindow status bar: bottom-row controls get their clicks shadowed by the frameless edge-resize margin

Report preparation

• I used the AI-assisted bug report tool (Help → Support → File an Issue)
• I have attached a support bundle or log file

What happened?

Surfaced while working PR #4829 (frameless move/resize under xcb, #4827).

FramelessResizer reserves a 6px band at every edge of a frameless MainWindow for edge-resize (src/gui/FramelessResizer.h/.cpp). The status bar is docked flush to the window's bottom edge, and several of its clickable controls have rects that genuinely extend into that band:

• gpsStatusButton (GPS & Station Location) overlaps by ~4px
• The "Cancel transmit" status label overlaps by ~1px

Confirmed live under QT_QPA_PLATFORM=xcb via the automation bridge's read-only hitTest verb (widgetAt/childAt both resolve to the control at a point inside the resize margin). Since FramelessResizer is an application-wide event filter, Qt guarantees it sees a press in that band before the widget does — so a click in the last few pixels of these controls resizes the window instead of activating the control.

Fix: cap maximumHeight() on the affected status-bar stacks/labels (gpsStatusButton and friends, built in MainWindow.cpp around the status bar setup) so their clickable area stops a few px short of the window edge. Belongs in the status bar layout, not in FramelessResizer, which has no way to know about a specific adopter's child geometry.

Not a blocker for #4829 — pre-existing exposure once any control sits this close to a frameless window edge; the PR's own fix (moving the filter application-wide) is what makes it observable on every platform instead of only where the edge-resize band happened to already be live.

What did you expect?

The status bar click areas should take precedence over resize handles.

Steps to reproduce

1. Connect to either radio or built-in simulator
2. Hover mouse over clickable area on status bar (e.g. station name)
3. slide mouse pointer down towards the lower edge
4. the pointer will turn into a resize handle whilst still inside the clickable area

AetherSDR version

v26.8.1

Radio model & firmware

Flex-8600 4.2.20

Operating system

Linux

OS version and hardware

Ubuntu 26.04, Wayland running AetherSDR under xcb fallback

Start in src/gui/FramelessResizer.h/.cpp to understand the 6px edge-resize band, then inspect the status-bar setup in MainWindow.cpp, especially gpsStatusButton, the GPS and Station Location controls, and the Cancel transmit label. Reproduce under QT_QPA_PLATFORM=xcb while moving across the bottom edge. Done means the affected controls remain clickable through their visible areas without triggering window resizing.