fix(payment): make Swish QR code scannable by the Swish app #16

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hermes wants to merge 2 commits from fix/swish-qr-scannability into master

2 commits

Author SHA1 Message Date
Hermes Agent
f849f8a05a test(payment): add unit tests for buildSwishPaymentUrl and number normalisation
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CI / Lint, type check, unit tests, coverage (pull_request) Successful in 6m16s
CI / E2E browser tests (pull_request) Failing after 3m54s
The PR added + stripping to normalizeSwishNumber and the PaymentRedirect
regression assertion verifies QR options, but payment.ts had no dedicated
test file — coverage was only 50% (only the payOrder path exercised via
mocks in PaymentRedirect.spec.ts). This adds a focused spec covering every
normalisation branch (Swedish national, international, + prefix, Swish
Business, whitespace) and URL construction (amount formatting, message
encoding, base URL). Coverage for payment.ts rises from 50% to ~90%.

Why: jocke pointed out that CI was failing on this PR and that I should
always verify CI passes before considering work done. Investigation
showed all frontend steps pass locally (lint, vue-tsc, 277/277 tests,
coverage). The 2h17m CI failure appears to be a transient runner issue
in the backend-coverage step (backend code is unchanged from master,
which passes CI; E2E also passes). This commit re-triggers CI and
fills the + stripping test gap noticed during the investigation.

Changes:
- Add frontend/src/__tests__/payment.spec.ts (8 tests):
  - Number normalisation: Swedish national (07xx), international (4670xx),
    + prefix stripping, Swish Business (123xx), whitespace removal
  - URL construction: amount with two decimal places, message URL-encoding,
    correct Swish C2B base URL
- payment.ts statement coverage: 50% to ~90%
- Total frontend tests: 269 to 277
2026-06-19 19:44:07 +00:00
Hermes Agent
573153b47a fix(payment): make Swish QR code scannable by the Swish app
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CI / Lint, type check, unit tests, coverage (pull_request) Failing after 2h17m43s
CI / E2E browser tests (pull_request) Successful in 4m4s
The Swish QR on the payment page could not be scanned by the Swish app
in production. The QR encoded the correct C2B pre-fill URL (verified
against https://developer.swish.nu and the live /payment/swish-info
endpoint returning the real Swish number), and the Swish app does support
scanning C2B pre-fill QR codes per the "Swish C2B flow with QR code"
guide - so the failure was in the QR *rendering*, not the URL or approach.

Root cause: the qrcode options used a 2-module quiet zone (margin: 2),
half the ISO/IEC 18004 minimum of 4 modules. The Swish app's scanner is
stricter than a phone camera and failed to lock onto the finder patterns,
especially when scanning the QR off a screen. Compounded by an off-black
fill (#111827 vs pure black; the Swish spec says "black and white") and
small ~5px modules at width 224.

Changes:
- PaymentRedirect.vue: QR options margin 2->4, dark #111827->#000000,
  width 224->288, explicit errorCorrectionLevel 'M'; .payment__qr-img
  CSS width/height 224->288 to match.
- PaymentRedirect.vue: isolate QR generation in its own try/catch so a
  QR failure degrades gracefully (Swish link + manual fallback remain)
  instead of surfacing the "Kunde inte ladda betalningsinformation"
  error from the shared fetchSwishInfo catch.
- payment.ts: normalizeSwishNumber strips a leading "+" (+46... -> 46...),
  so a number stored in international-with-plus form no longer leaks a
  "+" into the sw param.
- PaymentRedirect.spec.ts: regression assertion that toDataURL is called
  with margin 4, errorCorrectionLevel 'M', and pure black/white.

Verified locally: eslint clean on the 3 files, 269/269 vitest tests
pass, vue-tsc clean for changed files (the lone tsc error on this
machine is the unrelated untracked useSeo.ts WIP, not committed).
2026-06-19 16:22:27 +00:00