feat: add ChatAction sealed interface with CompositionLocal

Threading action lambdas through MessageList -> ContentBubble -> CashBubble
(and deeper as more bubble types gain interactions) is verbose. A
CompositionLocal matches the project established pattern (LocalVibrator,
LocalExchange, LocalCodeNavigator, etc.) and avoids lambda-threading
entirely.

Introduce ChatAction, ChatActionHandler, and LocalChatActionHandler in
the shared chat-ui module. MessageList accepts onAction and provides it
via CompositionLocalProvider so nested composables consume it from the
local. Cash bubbles are now clickable, dispatching ViewToken to navigate
to the token info screen.

Signed-off-by: Brandon McAnsh <git@bmcreations.dev>

Author: bmc08gt

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

@@ -42,6 +42,7 @@ import com.getcode.opencode.model.financial.Fiat
 import com.getcode.opencode.model.financial.Limits
 import com.getcode.opencode.model.financial.SendLimit
 import com.getcode.opencode.model.financial.Token
+import com.getcode.solana.keys.Mint
 import com.getcode.solana.keys.PublicKey
 import com.getcode.util.resources.ResourceHelper
 import com.getcode.utils.trace

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

@@ -43,9 +43,11 @@ import androidx.compose.ui.unit.dp
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.paging.compose.collectAsLazyPagingItems
 import com.flipcash.app.contacts.ui.ContactAvatar
+import com.flipcash.app.core.AppRoute
 import com.flipcash.app.core.contacts.DeviceContact
 import com.flipcash.app.messenger.internal.ChatViewModel
 import com.flipcash.app.messenger.internal.screens.components.MessageList
+import com.flipcash.shared.chat.ui.ChatAction
 import com.flipcash.features.messenger.R
 import com.getcode.navigation.core.CodeNavigator
 import com.getcode.navigation.core.LocalCodeNavigator
@@ -99,19 +101,30 @@ internal fun MessengerScreen(viewModel: ChatViewModel) {
             messages = messages,
             separatorConfig = state.separatorConfig,
             otherReadPointer = otherReadPointer,
-            onAdvanceReadPointer = { messageId ->
-                viewModel.dispatchEvent(ChatViewModel.Event.AdvanceReadPointer(messageId))
-            },
-            onRetryMessage = { bubble ->
-                keyboard.hideIfVisible {
-                    viewModel.dispatchEvent(
-                        ChatViewModel.Event.RetryMessage(bubble.pendingClientIdHex, bubble.content)
-                    )
+            onAction = { action ->
+                when (action) {
+                    is ChatAction.AdvanceReadPointer -> {
+                        viewModel.dispatchEvent(ChatViewModel.Event.AdvanceReadPointer(action.messageId))
+                    }
+                    ChatAction.RefreshContact -> {
+                        viewModel.dispatchEvent(ChatViewModel.Event.RefreshContact)
+                    }
+                    is ChatAction.RetryMessage -> {
+                        keyboard.hideIfVisible {
+                            viewModel.dispatchEvent(
+                                ChatViewModel.Event.RetryMessage(action.bubble.pendingClientIdHex, action.bubble.content)
+                            )
+                        }
+                    }
+                    is ChatAction.ViewToken -> {
+                        keyboard.hideIfVisible {
+                            viewModel.dispatchEvent(
+                                ChatViewModel.Event.OpenScreen(AppRoute.Token.Info(action.mint))
+                            )
+                        }
+                    }
                 }
             },
-            onRefreshContact = {
-                viewModel.dispatchEvent(ChatViewModel.Event.RefreshContact)
-            },
         )
     }
 }