fix(chat): return to the group after buying in from its gate

apps/flipcash/app/src/main/kotlin/com/flipcash/app/internal/ui/navigation/AppScreenContent.kt

@@ -126,7 +126,7 @@ fun appEntryProvider(
 
     // Tokens
     annotatedEntry<AppRoute.Token.Info>(testTag = "token_info_screen") { key ->
-        TokenInfoScreen(key.mint, key.shortfall, key.fromDeeplink, key.asPush)
+        TokenInfoScreen(key.mint, key.shortfall, key.fromDeeplink, key.asPush, key.returnAfterBuy)
     }
     annotatedEntry<AppRoute.Token.Transactions>(testTag = "transaction_history_screen") { key ->
         TransactionHistoryScreen(key.mint)

apps/flipcash/core/src/main/kotlin/com/flipcash/app/core/AppRoute.kt

@@ -216,6 +216,10 @@ sealed interface AppRoute : NavKey, Parcelable {
             // (fade-in-place, ✕ dismiss). Set when the screen is reached by drilling in from a list — e.g.
             // token discovery — where a back arrow that slides back is the expected navigation.
             val asPush: Boolean = false,
+            // Pop back to whatever opened this screen once a buy of [mint] succeeds, rather than
+            // staying here. Set by a chat's gate: the reader came to buy their way into the group,
+            // so the purchase finishing is the moment to put them back in front of Join.
+            val returnAfterBuy: Boolean = false,
         ) : Token
 
         @Serializable

apps/flipcash/features/messenger/src/main/kotlin/com/flipcash/app/messenger/internal/screens/MessengerScreen.kt

@@ -73,7 +73,11 @@ internal fun MessengerScreen(viewModel: ChatViewModel) {
                             // A drill-in from the transcript, so push it: the fade-in-place
                             // expand is the wallet card growing into its own detail, and there
                             // is no card here for it to grow from.
-                            AppRoute.Token.Info(action.mint, asPush = true)
+                            AppRoute.Token.Info(
+                                action.mint,
+                                asPush = true,
+                                returnAfterBuy = action.returnAfterBuy,
+                            )
                         )
                     )
                 }

apps/flipcash/features/messenger/src/main/kotlin/com/flipcash/app/messenger/internal/screens/components/GroupGateBar.kt

@@ -121,7 +121,7 @@ internal fun GroupGateBar(
                 enabled = currency != null,
                 onClick = {
                     unmetBalance.mints.firstOrNull()
-                        ?.let { onAction(ChatAction.ViewToken(Mint(it.bytes))) }
+                        ?.let { onAction(ChatAction.ViewToken(Mint(it.bytes), returnAfterBuy = true)) }
                 },
             )
         } else {

apps/flipcash/features/tokens/src/main/kotlin/com/flipcash/app/tokens/TokenInfoScreen.kt

@@ -35,6 +35,7 @@ import com.flipcash.app.analytics.Analytics
 import com.flipcash.app.analytics.Button
 import com.flipcash.app.analytics.rememberAnalytics
 import com.flipcash.app.core.AppRoute
+import com.flipcash.app.core.tokens.SwapPurpose
 import com.flipcash.app.core.tokens.SwapResult
 import com.flipcash.app.tokens.internal.TokenInfoScreen
 import com.flipcash.app.tokens.internal.components.info.CurrencyInfoTitlePill
@@ -66,6 +67,7 @@ fun TokenInfoScreen(
     shortFall: Fiat?,
     fromDeeplink: Boolean,
     asPush: Boolean = false,
+    returnAfterBuy: Boolean = false,
 ) {
     val navigator = LocalCodeNavigator.current
     val analytics = rememberAnalytics()
@@ -198,9 +200,18 @@ fun TokenInfoScreen(
                 when (screen) {
                     is AppRoute.Token.Swap -> {
                         navigator.navigateForResult<SwapResult>(screen) { result ->
-                            if (result is NavResultOrCanceled.ReturnValue &&
-                                result.value is SwapResult.OpenDeposit) {
-                                navigator.push(AppRoute.Transfers.Deposit(showOtherOptions = false))
+                            if (result !is NavResultOrCanceled.ReturnValue) return@navigateForResult
+                            when (result.value) {
+                                is SwapResult.OpenDeposit ->
+                                    navigator.push(AppRoute.Transfers.Deposit(showOtherOptions = false))
+                                // Only a buy of this currency. Add Money from here also ends in a
+                                // successful Buy, but of USDF to fund this one, and the reader
+                                // still has this purchase to make.
+                                is SwapResult.Success -> {
+                                    val bought = (screen.purpose as? SwapPurpose.Buy)?.mint
+                                    if (returnAfterBuy && bought == mint) navigator.pop()
+                                }
+                                else -> Unit
                             }
                         }
                     }

apps/flipcash/shared/chat-ui/src/main/kotlin/com/flipcash/shared/chat/models/ChatAction.kt

@@ -9,7 +9,11 @@ sealed interface ChatAction {
     data class RetryMessage(val bubble: ChatListItem.ContentBubble) : ChatAction
     data class AdvanceReadPointer(val messageId: Long) : ChatAction
     object RefreshContact : ChatAction
-    data class ViewToken(val mint: Mint) : ChatAction
+    /**
+     * Opens a currency's info screen. [returnAfterBuy] brings the reader back here once they buy
+     * it — set by the group gate, where buying is how they get in.
+     */
+    data class ViewToken(val mint: Mint, val returnAfterBuy: Boolean = false) : ChatAction
 
     /**
      * Opens the group a link card names, pushed over this chat so Back returns here. The pushed