- Default the Owner select to the creator's own account instead of "All", so
superadmin-created codes no longer silently become visible to every admin
(the underlying NULL-fallback sharing behavior for an explicit "All" choice
is unchanged).
- Add a live color/precision/size preview swatch next to the preset picker.
- Let the frame text use a chosen DejaVu font + font size instead of a fixed
GD bitmap font.
- Add an optional self-uploaded icon rendered above the qr code (not embedded
in it, so scanability is unaffected).
- Make the Bitcoin qr amount optional; a standing wallet address is useful
without forcing a one-off amount per code.
- Add a WPA3 option to the WiFi qr encryption select.
- Fix a real bug surfaced while testing the preview/style JS: qrcode_options.php
was included once per static qr type (16 times on one page) and each
inclusion re-executed <script src="qrcode-style-tools.js">, so every button
click fired once per type - e.g. saving one preset wrote 16 duplicate rows,
and every tab except the first ("Text") had dead random-style/preset
buttons since only the first DOM match ever got a listener. Moved the
script include to load once per page and rewrote the JS to scope every
lookup to the triggering element's own tab-pane/form instead of relying on
getElementById's first-match behavior.