fix: handle non-standard BIP21 URIs in QR scanner

[wired-pasteque]

Fix: #2202

ScreenRecording_06-16-2026.10-16-14_1.MP4

[i5hi]

Example test cases that cover the following:

• LNURL complete string with additional query params
• Stardard Bolt11 invoice
• LNAddress format - uses %40 instead of @ since its part of a url

bitcoin:BC1Q…?lightning=lnurl1dp68gurn8ghj7um9wfmxjcm99e3k7mf0v9cxj0m385ekvcenxc6r2c35xvukxefcv5mkvv34x5ekzd3ev56nyd3hxqurzepexejxxepnxscrvwfnv9nxzcn9xq6xyefhvgcxxcmyxymnserxfq5fns&label=Donation&message=Thanks
 
bitcoin:BC1Q…?lightning=lnbc2500u1pvjluezpp5qqqsyqcyq5rqwzqfqqqsyqcyq5rqwzqfqqqsyqcyq5rqwzqfqypqdq5xysxxatsyp3k7enxv4jsxqzpuaztrnwngzn3kdzw5hydlzf03qdgm2hdq27cqv3agm2awhz5se903vruatfhq77w3ls4evs3ch9zw97j25emudupq63nyw24cg27h2rspfj9srp

https://admin.bullbitcoin.com/abc?lightning=ishi%40walletofsatoshi.com&label=pleasefundme

[wired-pasteque]

@i5hi, added unit tests for all cases and fixed the parser to correctly handle the third one:

LNAddress format - uses %40 instead of @ since its part of a url

[i5hi]

this may not cover all cases and in some cases may have extra information. added test cases.

this makes 2 assumptions:

• the string will only be lnurl format - skips bolt11 and lnaddress formats
• there will be no additional data after the lnurl string - in some cases there maybe more query params like label, message or other network addresses