Single card scans open the best candidate on its standard detail screen. Detail arrows preserve the scan alternatives. Back returns to a clean scanner without restoring the previous result. Bulk queue/review and scan history remain; opening a card never adds it to collection automatically. Leaving the scanner cancels late result navigation.

App PR: https://github.com/snag-tcg/poc-tcg-collector/pull/951. Real reducer tests cover Back, alternatives, bulk/sealed exclusions and empty results. Focused regressions: 42 pass. Lint/typecheck pass. Full tests: 3252 passed, 11 skipped; the same two pre-existing priceObservation date failures remain. Push hook bypassed only for those documented staging failures; no test weakened. Device flows are prepared but not run. Development ran on the personal VPS; no local emulator, account, collection or production deployment was changed.