chore(main): release 1.3.0 - #24

🤖 I have created a release beep boop

1.3.0 (2026-08-28)

Features

• add in-app about screen with version and source link (c3e4c56)
• add QR/barcode scanning as a standalone camera mode (18dc243)

Bug Fixes

• clarify version display and expand the about dialog (71592fe)
• corner role validation could reject valid, correctly-ordered crops (e61972b)
• dedupe snackbar helper, guard a post-dispose setState, surface launchUrl failures (c478ecb)
• enable tryHarder so 1D barcodes (EAN/UPC/Code128) actually decode (d0661ba)
• QR scan result never clears, and the found-code overlay looked clickable (01c2c36)
• QR/barcode scanning never detecting a code (1e92ad7)
• reject corner quads with mismatched tl/tr/br/bl roles (d726d4d), closes #20
• show corner-adjust errors in a snackbar instead of shrinking the preview (012d0fe), closes #21
• use FOSScanner consistently in user-facing display strings (600fbe0)
• use_build_context_synchronously lint in _openResult (e9c9fa3)

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