feat(chat): show agent message reactions (#1422)

app/src/main/java/com/m57/hermescontrol/data/ws/EventParser.kt

@@ -1,6 +1,7 @@
 package com.m57.hermescontrol.data.ws
 
 import android.util.Log
+import com.m57.hermescontrol.data.model.parseMessageReactions
 import com.m57.hermescontrol.ui.chat.extractTodosFromMap
 import kotlinx.serialization.json.JsonObject
 
@@ -333,6 +334,20 @@ object EventParser {
                 WsEvent.ReactionEvent(kind)
             }
 
+            "message.reaction" -> {
+                val rowId = (payload?.get("row_id") as? Number)?.toLong()
+                if (rowId == null) {
+                    WsEvent.Unknown(rawJson)
+                } else {
+                    WsEvent.MessageReactionUpdated(
+                        rowId = rowId,
+                        reactions = parseMessageReactions(payload["reactions"]),
+                        role = payload["role"] as? String ?: "",
+                        sessionId = sessionId,
+                    )
+                }
+            }
+
             "approval.request" -> {
                 val command = payload?.get("command") as? String
                 val description = payload?.get("description") as? String

app/src/main/java/com/m57/hermescontrol/data/ws/WsEvent.kt

@@ -445,6 +445,18 @@ sealed class WsEvent {
         val kind: String = "",
     ) : WsEvent()
 
+    /**
+     * `message.reaction`: the agent (or another client) set/cleared a tapback on a stored
+     * message. [reactions] is the row's full list after the write; [rowId] is the gateway
+     * SQLite row id, matched against `ChatMessage.serverRowId`.
+     */
+    data class MessageReactionUpdated(
+        val rowId: Long,
+        val reactions: List<com.m57.hermescontrol.data.model.MessageReaction>,
+        val role: String,
+        val sessionId: String?,
+    ) : WsEvent()
+
     // ── Replay resync (internal) ──────────────────────────────────────────
 
     /** Internal: replay could not cover the reconnect gap (truncated or epoch change) — UI must refetch history. */