feat(chat): 补齐文字表情原地更新契约（风险：低）

基于 PR #621 现有 update-text-emotion 实现，补齐七参数 RPC 映射、Cobra/Schema 必填约束、mono Skill、CHANGELOG 与别名/缺参回归测试。

internal/helpers/chat_text_emotion_update_test.go

@@ -0,0 +1,86 @@
+// Copyright 2026 Alibaba Group
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package helpers
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestChatMessageUpdateTextEmotionMapsReplacementTemplate(t *testing.T) {
+	for _, locator := range []string{"conversation-id", "group", "id", "chat"} {
+		t.Run(locator, func(t *testing.T) {
+			caller := &wukongWeeklySyncCaller{}
+			_, _, err := executeWukongWeeklySyncCommand(t, "chat", caller, newChatCommand,
+				"message", "update-text-emotion",
+				"--"+locator, "cid",
+				"--msg-id", "mid",
+				"--old-emotion-id", "old-emotion",
+				"--emotion-id", "new-emotion",
+				"--emotion-name", "赞",
+				"--text", "nice",
+				"--background-id", "im_bg_5",
+			)
+			if err != nil {
+				t.Fatalf("update-text-emotion returned error: %v", err)
+			}
+			requireWukongWeeklySyncCall(t, caller, wukongWeeklySyncCall{
+				server: "im",
+				tool:   "update_text_emotion",
+				args: map[string]any{
+					"openConversationId": "cid",
+					"openMsgId":          "mid",
+					"oldEmotionId":       "old-emotion",
+					"emotionId":          "new-emotion",
+					"emotionName":        "赞",
+					"text":               "nice",
+					"backgroundId":       "im_bg_5",
+				},
+			})
+		})
+	}
+}
+
+func TestChatMessageUpdateTextEmotionRequiresEveryBusinessParameter(t *testing.T) {
+	required := []struct {
+		name string
+		args []string
+	}{
+		{name: "conversation-id", args: []string{"--group", "cid"}},
+		{name: "msg-id", args: []string{"--msg-id", "mid"}},
+		{name: "old-emotion-id", args: []string{"--old-emotion-id", "old-emotion"}},
+		{name: "emotion-id", args: []string{"--emotion-id", "new-emotion"}},
+		{name: "emotion-name", args: []string{"--emotion-name", "赞"}},
+		{name: "text", args: []string{"--text", "nice"}},
+		{name: "background-id", args: []string{"--background-id", "im_bg_5"}},
+	}
+
+	for omitted := range required {
+		t.Run("missing-"+required[omitted].name, func(t *testing.T) {
+			args := []string{"message", "update-text-emotion"}
+			for i, parameter := range required {
+				if i != omitted {
+					args = append(args, parameter.args...)
+				}
+			}
+
+			caller := &wukongWeeklySyncCaller{}
+			_, _, err := executeWukongWeeklySyncCommand(t, "chat", caller, newChatCommand, args...)
+			if err == nil || !strings.Contains(err.Error(), required[omitted].name) {
+				t.Fatalf("missing %s error = %v", required[omitted].name, err)
+			}
+			requireWukongWeeklySyncNoCalls(t, caller)
+		})
+	}
+}