fix(wallet): resolve sealed interface inheritance issue

TimelineItemEventContent is a sealed interface in messages:impl, so external
modules cannot add implementers to its hierarchy.

Solution: Create TimelineItemPaymentContentWrapper in messages:impl that
implements the sealed interface and wraps the wallet API's payment content.

Changes:
- Remove inheritance from TimelineItemPaymentContent (wallet:api)
- Add TimelineItemPaymentContentWrapper (messages:impl)
- Update TimelineItemContentFactory to wrap payment content
- Update TimelineItemEventContentView to use wrapper

features/messages/impl/src/main/kotlin/io/element/android/features/messages/impl/timeline/components/event/TimelineItemEventContentView.kt

@@ -29,8 +29,8 @@ import io.element.android.features.messages.impl.timeline.model.event.TimelineIt
 import io.element.android.features.messages.impl.timeline.model.event.TimelineItemTextBasedContent
 import io.element.android.features.messages.impl.timeline.model.event.TimelineItemUnknownContent
 import io.element.android.features.messages.impl.timeline.model.event.TimelineItemVideoContent
+import io.element.android.features.messages.impl.timeline.model.event.TimelineItemPaymentContentWrapper
 import io.element.android.features.messages.impl.timeline.model.event.TimelineItemVoiceContent
-import io.element.android.features.wallet.api.timeline.TimelineItemPaymentContent
 import io.element.android.features.wallet.impl.timeline.TimelineItemPaymentView
 import io.element.android.libraries.architecture.Presenter
 import io.element.android.libraries.voiceplayer.api.VoiceMessageState
@@ -136,8 +136,8 @@ fun TimelineItemEventContentView(
                 modifier = modifier
             )
         }
-        is TimelineItemPaymentContent -> TimelineItemPaymentView(
-            content = content,
+        is TimelineItemPaymentContentWrapper -> TimelineItemPaymentView(
+            content = content.paymentContent,
             modifier = modifier
         )
         is TimelineItemRtcNotificationContent -> error("This shouldn't be rendered as the content of a bubble")

features/messages/impl/src/main/kotlin/io/element/android/features/messages/impl/timeline/factories/event/TimelineItemContentFactory.kt

@@ -37,6 +37,7 @@ import io.element.android.libraries.matrix.api.timeline.item.event.UnableToDecry
 import io.element.android.libraries.matrix.api.timeline.item.event.UnknownContent
 import io.element.android.libraries.matrix.api.timeline.item.event.CustomEventContent
 import io.element.android.libraries.matrix.api.timeline.item.event.getDisambiguatedDisplayName
+import io.element.android.features.messages.impl.timeline.model.event.TimelineItemPaymentContentWrapper
 import io.element.android.features.wallet.impl.timeline.TimelineItemContentPaymentFactory
 
 @Inject
@@ -65,7 +66,7 @@ class TimelineItemContentFactory(
             if (rawJson != null) {
                 val paymentContent = paymentFactory.createFromRaw(rawJson, isOutgoing)
                 if (paymentContent != null) {
-                    return paymentContent
+                    return TimelineItemPaymentContentWrapper(paymentContent)
                 }
             }
         }

features/messages/impl/src/main/kotlin/io/element/android/features/messages/impl/timeline/model/event/TimelineItemPaymentContentWrapper.kt

@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2026 Sulkta Coop.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package io.element.android.features.messages.impl.timeline.model.event
+
+import androidx.compose.runtime.Immutable
+import io.element.android.features.wallet.api.PaymentCardStatus
+import io.element.android.features.wallet.api.timeline.TimelineItemPaymentContent
+
+/**
+ * Wrapper for [TimelineItemPaymentContent] that implements [TimelineItemEventContent].
+ *
+ * This wrapper is necessary because [TimelineItemEventContent] is a sealed interface
+ * that must have all implementers in the same module. Since the wallet module
+ * cannot add types to the sealed hierarchy, we wrap the payment content here.
+ */
+@Immutable
+data class TimelineItemPaymentContentWrapper(
+    val paymentContent: TimelineItemPaymentContent,
+) : TimelineItemEventContent {
+    override val type: String = paymentContent.type
+
+    // Delegate properties for convenience
+    val amountLovelace: Long get() = paymentContent.amountLovelace
+    val toAddress: String get() = paymentContent.toAddress
+    val fromAddress: String get() = paymentContent.fromAddress
+    val txHash: String? get() = paymentContent.txHash
+    val status: PaymentCardStatus get() = paymentContent.status
+    val network: String get() = paymentContent.network
+    val isSentByMe: Boolean get() = paymentContent.isSentByMe
+    val fallbackText: String get() = paymentContent.fallbackText
+    val amountAda: String get() = paymentContent.amountAda
+    val isTestnet: Boolean get() = paymentContent.isTestnet
+    val truncatedTxHash: String? get() = paymentContent.truncatedTxHash
+    val explorerUrl: String? get() = paymentContent.explorerUrl
+}

features/wallet/api/src/main/kotlin/io/element/android/features/wallet/api/timeline/TimelineItemPaymentContent.kt

@@ -7,12 +7,17 @@
 package io.element.android.features.wallet.api.timeline
 
 import androidx.compose.runtime.Immutable
-import io.element.android.features.messages.impl.timeline.model.event.TimelineItemEventContent
 import io.element.android.features.wallet.api.PaymentCardStatus
 
 /**
  * Timeline content for a Cardano payment event.
  *
+ * This class represents payment event content and can be rendered
+ * in the timeline. It does NOT inherit from TimelineItemEventContent
+ * to avoid circular dependencies between wallet:api and messages:impl.
+ *
+ * The TimelineItemContentFactory handles this type specially.
+ *
  * @property amountLovelace The payment amount in lovelace (1 ADA = 1,000,000 lovelace)
  * @property toAddress The recipient's Cardano address (Bech32)
  * @property fromAddress The sender's Cardano address (Bech32)
@@ -32,8 +37,8 @@ data class TimelineItemPaymentContent(
     val network: String,
     val isSentByMe: Boolean,
     val fallbackText: String,
-) : TimelineItemEventContent {
-    override val type: String = EVENT_TYPE
+) {
+    val type: String = EVENT_TYPE
 
     /**
      * Amount formatted in ADA (lovelace / 1,000,000).