feat(chat): 添加聊天界面视图模型和联系人管理功能

- 实现 ChatViewModel 处理消息收发、历史记录加载和状态管理
- 添加消息搜索、草稿保存、引用回复等功能
- 实现多媒体附件发送包括图片、视频、音频和文件
- 添加群组提及用户功能和消息撤回机制
- 实现联系人管理功能包括好友搜索、添加、删除和黑名单管理
- 添加好友请求处理和实时消息监听
- 实现会话列表管理包含未读消息统计和实时更新
- 集成 IM SDK 的连接状态管理和事件监听
- 添加消息状态跟踪和超时处理机制
- 实现数据缓存机制优化用户体验

im-sdk/src/main/java/com/xuqm/im/sdk/XuqmImServerSdk.java

@@ -321,18 +321,51 @@ public final class XuqmImServerSdk {
     }
 
     public ImMessage parseMessageCallbackPayload(String body) {
-        WebhookCallbackEnvelope envelope = parseCallbackEnvelope(body);
+        return parseMessageCallbackPayload(parseCallbackEnvelope(body));
+    }
+
+    public ImMessage parseMessageCallbackPayload(WebhookCallbackEnvelope envelope) {
         if (!envelope.isMessageEvent()
-                || !(envelope.isEvent("message.sent")
+                || !(envelope.isMessageSentEvent()
-                || envelope.isEvent("message.edited")
+                || envelope.isMessageEditedEvent()
-                || envelope.isEvent("message.revoked"))) {
+                || envelope.isMessageRevokedEvent())) {
             throw new ImSdkException("Callback event is not a message event");
         }
         return readPayload(envelope, ImMessage.class);
     }
 
+    public ImMessage parseMessageSentCallbackPayload(String body) {
+        return parseMessageSentCallbackPayload(parseCallbackEnvelope(body));
+    }
+
+    public ImMessage parseMessageSentCallbackPayload(WebhookCallbackEnvelope envelope) {
+        requireMessageEvent(envelope, "message.sent");
+        return readPayload(envelope, ImMessage.class);
+    }
+
+    public ImMessage parseMessageEditedCallbackPayload(String body) {
+        return parseMessageEditedCallbackPayload(parseCallbackEnvelope(body));
+    }
+
+    public ImMessage parseMessageEditedCallbackPayload(WebhookCallbackEnvelope envelope) {
+        requireMessageEvent(envelope, "message.edited");
+        return readPayload(envelope, ImMessage.class);
+    }
+
+    public ImMessage parseMessageRevokedCallbackPayload(String body) {
+        return parseMessageRevokedCallbackPayload(parseCallbackEnvelope(body));
+    }
+
+    public ImMessage parseMessageRevokedCallbackPayload(WebhookCallbackEnvelope envelope) {
+        requireMessageEvent(envelope, "message.revoked");
+        return readPayload(envelope, ImMessage.class);
+    }
+
     public MessageReadCallbackPayload parseMessageReadCallbackPayload(String body) {
-        WebhookCallbackEnvelope envelope = parseCallbackEnvelope(body);
+        return parseMessageReadCallbackPayload(parseCallbackEnvelope(body));
+    }
+
+    public MessageReadCallbackPayload parseMessageReadCallbackPayload(WebhookCallbackEnvelope envelope) {
         if (!envelope.isReadReceiptEvent()) {
             throw new ImSdkException("Callback event is not a message.read event");
         }
@@ -1240,6 +1273,12 @@ public final class XuqmImServerSdk {
         }
     }
 
+    private void requireMessageEvent(WebhookCallbackEnvelope envelope, String event) {
+        if (!envelope.isMessageEvent() || !envelope.isEvent(event)) {
+            throw new ImSdkException("Callback event is not a " + event + " event");
+        }
+    }
+
     private static String text(JsonNode node, String field) {
         JsonNode value = node == null ? null : node.get(field);
         return value == null || value.isNull() ? null : value.asText();
@@ -1718,6 +1757,18 @@ public final class XuqmImServerSdk {
             return isType("message");
         }
 
+        public boolean isMessageSentEvent() {
+            return isEvent("message.sent");
+        }
+
+        public boolean isMessageEditedEvent() {
+            return isEvent("message.edited");
+        }
+
+        public boolean isMessageRevokedEvent() {
+            return isEvent("message.revoked");
+        }
+
         public boolean isReadReceiptEvent() {
             return isEvent("message.read");
         }