K2: card purchases on Android (Room 2, card cycle, :feature:cards S-23 to S-27)

- :core:model model/Cards.kt per SPEC §14.2.4 "Changes in v0.35"; ContractTest covers the card wire values.
- :domain matchCardPurchase (§14.5.8), passing match_card_purchase.json (17 cases) in VectorTest.
- :data Room version 2 (card_connections, card_purchases, card_sync_state, MIGRATION_1_2 with its test,
  2.json exported); DTOs for E-36 to E-44 round-tripping K1's examples; the card cycle (E-44 push of
  pending link changes, E-40 pull) after each household cycle and after refresh; CardRepositoryImpl with
  CP-9 prefill, CP-10 matches, offline-first link/unlink/ignore; a local expense delete unlinks.
- :core:fakes FakeCardRepository and fakes/cards scenarios for every state of S-23 to S-27.
- :feature:cards S-23 (sheet and "Välj en annan utgift"), S-24, S-25 (Custom Tab, E-38 every 2 s while
  resumed, return link), S-26 (disconnect dialog), S-27, CardArt with the SJ Prio picture and the drawn
  fallback; 135 goldens and state-holder tests.
- :feature:expense S-7 cardPurchaseId prefill and link on save, S-8 "Från kortköp" line;
  :feature:account S-5 "Från kortköp"; :feature:settings S-13 "Anslut kort".
- :core:design KvittDestination.Cards with credit_card and nav_cards (four destinations, D-172); the
  bar's labels shrink to fit at large font scales. :app routes, kvitt://cards/connected, bindings.
- docs/ux/strings.csv: the card keys of §13.3 plus K2's additions.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TQd3pEP9UeN2uifbHknQ7B

android/gradle/libs.versions.toml

@@ -24,6 +24,8 @@ kotlinxSerialization = "1.11.0"
 kotlinxCoroutines = "1.11.0"
 kotlinxDatetime = "0.8.0"
 coil = "3.6.3"
+# Custom Tabs for the bank's BankID page (D-173, S-25): the latest stable on Google Maven on 2026-10-24.
+browser = "1.10.0"
 junit = "4.13.2"
 robolectric = "4.17"
 roborazzi = "1.76.0"
@@ -50,6 +52,7 @@ androidx-compose-ui-test-manifest = { module = "androidx.compose.ui:ui-test-mani
 androidx-compose-material3 = { module = "androidx.compose.material3:material3", version.ref = "material3" }
 androidx-room3-runtime = { module = "androidx.room3:room3-runtime", version.ref = "room3" }
 androidx-room3-compiler = { module = "androidx.room3:room3-compiler", version.ref = "room3" }
+androidx-browser = { module = "androidx.browser:browser", version.ref = "browser" }
 androidx-work-runtime-ktx = { module = "androidx.work:work-runtime-ktx", version.ref = "work" }
 androidx-work-testing = { module = "androidx.work:work-testing", version.ref = "work" }
 hilt-android = { module = "com.google.dagger:hilt-android", version.ref = "hilt" }