refactor(commons): extract CashuWalletOps to commons for amy reuse

Move the NIP-60/61 wallet orchestration layer (CashuWalletOps + its
result types: TokenEntry, MintQuoteStarted, MintCompleted, MeltCompleted,
SendTokenCompleted, RedeemCompleted, NutzapSent, RestoreOutcome,
MigrationResult, CreatedWallet, describeMintError) out of amethyst into
commons/jvmAndroid/cashu/ops.

The class already had zero Android dependencies — it takes signer,
publish, okHttpClient, secretFactory, and the NUT-13 counter callbacks as
constructor params. It lands in the jvmAndroid source set (not commonMain)
because it composes quartz's jvmAndroid CashuMintOperations/MintHttpClient
and uses ConcurrentHashMap. Both Android (amethyst) and the JVM CLI (amy)
can now drive the exact same wallet code path.

This is Extraction B of cli/plans/2026-05-28-cashu-cli.md. Android
callers (CashuWalletState, the wallet ViewModels, AccountViewModel)
updated to the new package; no behavioral change.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011SapGdtAc1j7woifoCZ9fY

amethyst/src/main/java/com/vitorpamplona/amethyst/model/nip60Cashu/CashuWalletState.kt

@@ -20,6 +20,13 @@
  */
 package com.vitorpamplona.amethyst.model.nip60Cashu
 
+import com.vitorpamplona.amethyst.commons.cashu.ops.CashuWalletOps
+import com.vitorpamplona.amethyst.commons.cashu.ops.MeltCompleted
+import com.vitorpamplona.amethyst.commons.cashu.ops.NutzapSent
+import com.vitorpamplona.amethyst.commons.cashu.ops.RestoreOutcome
+import com.vitorpamplona.amethyst.commons.cashu.ops.SendTokenCompleted
+import com.vitorpamplona.amethyst.commons.cashu.ops.TokenEntry
+import com.vitorpamplona.amethyst.commons.cashu.ops.describeMintError
 import com.vitorpamplona.amethyst.commons.relayClient.assemblers.CashuWalletFilterAssembler
 import com.vitorpamplona.amethyst.commons.relayClient.assemblers.CashuWalletQueryState
 import com.vitorpamplona.amethyst.model.AccountSettings

amethyst/src/main/java/com/vitorpamplona/amethyst/service/cashu/melt/MeltProcessor.kt

@@ -35,7 +35,7 @@ import kotlin.coroutines.cancellation.CancellationException
  * via NUT-05 melt (`POST /v1/melt/quote/bolt11` + `POST /v1/melt/bolt11`).
  *
  * This is the "Redeem" button on a received cashu token preview — distinct
- * from the NIP-60 wallet's own send-LN flow ([com.vitorpamplona.amethyst.model.nip60Cashu.CashuWalletOps.meltToLightning]),
+ * from the NIP-60 wallet's own send-LN flow ([com.vitorpamplona.amethyst.commons.cashu.ops.CashuWalletOps.meltToLightning]),
  * which spends the user's stored proofs and rolls change back into the wallet.
  * Here there is no wallet: the proofs come straight off the pasted token and
  * any leftover stays with the mint.

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/AccountViewModel.kt

@@ -40,6 +40,7 @@ import com.vitorpamplona.amethyst.Amethyst
 import com.vitorpamplona.amethyst.LocalPreferences
 import com.vitorpamplona.amethyst.R
 import com.vitorpamplona.amethyst.commons.audio.VisualizerStyle
+import com.vitorpamplona.amethyst.commons.cashu.ops.describeMintError
 import com.vitorpamplona.amethyst.commons.model.LiveHiddenUsers
 import com.vitorpamplona.amethyst.commons.model.emphChat.EphemeralChatChannel
 import com.vitorpamplona.amethyst.commons.model.nip28PublicChats.PublicChatChannel
@@ -1009,8 +1010,7 @@ class AccountViewModel(
         } catch (e: Exception) {
             onError(
                 stringRes(com.vitorpamplona.amethyst.Amethyst.instance.appContext, R.string.nutzap_failed_title),
-                com.vitorpamplona.amethyst.model.nip60Cashu
-                    .describeMintError(e),
+                describeMintError(e),
                 baseNote.author,
             )
         }
@@ -1042,8 +1042,7 @@ class AccountViewModel(
             if (e is CancellationException) throw e
             onError(
                 stringRes(com.vitorpamplona.amethyst.Amethyst.instance.appContext, R.string.nutzap_failed_title),
-                com.vitorpamplona.amethyst.model.nip60Cashu
-                    .describeMintError(e),
+                describeMintError(e),
                 getUserIfExists(recipientPubKey),
             )
         }

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/wallet/CashuWalletViewModel.kt

@@ -21,12 +21,12 @@
 package com.vitorpamplona.amethyst.ui.screen.loggedIn.wallet
 
 import androidx.lifecycle.ViewModel
+import com.vitorpamplona.amethyst.commons.cashu.ops.CashuWalletOps
+import com.vitorpamplona.amethyst.commons.cashu.ops.MintQuoteStarted
+import com.vitorpamplona.amethyst.commons.cashu.ops.TokenEntry
+import com.vitorpamplona.amethyst.commons.cashu.ops.describeMintError
 import com.vitorpamplona.amethyst.model.Account
-import com.vitorpamplona.amethyst.model.nip60Cashu.CashuWalletOps
 import com.vitorpamplona.amethyst.model.nip60Cashu.CashuWalletState
-import com.vitorpamplona.amethyst.model.nip60Cashu.MintQuoteStarted
-import com.vitorpamplona.amethyst.model.nip60Cashu.TokenEntry
-import com.vitorpamplona.amethyst.model.nip60Cashu.describeMintError
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import com.vitorpamplona.quartz.lightning.LnInvoiceUtil
 import com.vitorpamplona.quartz.nip60Cashu.mintApi.MeltQuoteBolt11ResponseDto

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/wallet/ReloadMintViewModel.kt

@@ -23,9 +23,9 @@ package com.vitorpamplona.amethyst.ui.screen.loggedIn.wallet
 import androidx.compose.runtime.Immutable
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
+import com.vitorpamplona.amethyst.commons.cashu.ops.describeMintError
 import com.vitorpamplona.amethyst.model.Note
 import com.vitorpamplona.amethyst.model.nip60Cashu.CashuWalletState
-import com.vitorpamplona.amethyst.model.nip60Cashu.describeMintError
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import com.vitorpamplona.quartz.nip01Core.core.Event
 import com.vitorpamplona.quartz.nip47WalletConnect.Nip47WalletConnect

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/wallet/TopUpMintViewModel.kt

@@ -23,8 +23,8 @@ package com.vitorpamplona.amethyst.ui.screen.loggedIn.wallet
 import androidx.compose.runtime.Immutable
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
+import com.vitorpamplona.amethyst.commons.cashu.ops.describeMintError
 import com.vitorpamplona.amethyst.model.nip60Cashu.CashuWalletState
-import com.vitorpamplona.amethyst.model.nip60Cashu.describeMintError
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import com.vitorpamplona.quartz.nip47WalletConnect.Nip47WalletConnect
 import com.vitorpamplona.quartz.nip47WalletConnect.rpc.PayInvoiceMethod
@@ -47,7 +47,7 @@ import kotlinx.coroutines.launch
  *
  * Reuses the same funding primitives as [ReloadMintViewModel] —
  * [CashuWalletState.rebalance] for a mint-to-mint move and
- * [com.vitorpamplona.amethyst.model.nip60Cashu.CashuWalletOps.startMintFromLightning] /
+ * [com.vitorpamplona.amethyst.commons.cashu.ops.CashuWalletOps.startMintFromLightning] /
  * `completeMintFromLightning` for an LN top-up — but without any of the
  * zap-specific machinery (recipient, shared-mint intersection, fixed send
  * amount + shortfall, terminal nutzap, fund-then-send atomicity). The user

commons/src/jvmAndroid/kotlin/com/vitorpamplona/amethyst/commons/cashu/ops/CashuWalletOps.kt

@@ -18,7 +18,7 @@
  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
-package com.vitorpamplona.amethyst.model.nip60Cashu
+package com.vitorpamplona.amethyst.commons.cashu.ops
 
 import com.vitorpamplona.quartz.nip01Core.core.Address
 import com.vitorpamplona.quartz.nip01Core.core.Event