Bug 506034

Calculator widget width can be reduced to 182 pixels on desktop without automatically switching to icon mode, and it remains so after any plasmashell restart.
However, this results in an automatic switch to icon mode upon the next plasmashell restart when the widget is on a panel, e.g. a wide vertical one used as a sidebar, although it remains in full representation mode until a plasmashell restart. The panel must be at least 202 pixels wide for the calculator widget to remain functional.

STEPS TO REPRODUCE
1. Create an empty panel, position it to the right edge of the screen, and set its width to 256 pixels.
2. Add the calculator widget to both desktop and this new panel.
3. Reduce the size of the desktop widget to the very minimum, which will probably be 182 pixels wide.
4. Next reduce the width of the panel containing the widget to something between 182 and 200 pixels.
5. Finally, restart the plasma shell using the command `plasmashell --replace` or by logging out and back in.

OBSERVED RESULT
The calculator widget on the desktop remain functional with a width of 182 px, but the one on the panel automatically switches to icon mode although the panel is wider than 182 px.

EXPECTED RESULT
Calculator widget should be functional (in full representation mode) and remain so even after plasmashell restart like some other widgets such as Analog Clock and Media Player when the width of the panel it contains is under 202 px (down to minimum 182 px).

SOFTWARE/OS VERSIONS
Debian 13 (Trixie)
KDE Plasma 6.3.5
KDE Frameworks  6.13.0
Qt 6.8.2