🐛 fix(query-editor): 补齐SQL Server冗余结果集过滤

- 为 SQL Server 原生多结果集缺失 statementIndex 的场景补齐结果归属
- 修复单条 SELECT 查询尾随 affectedRows 结果被误渲染为额外结果页签的问题
- 补充前后端回归测试并保持存储过程多结果集展示不变

internal/app/methods_db.go

@@ -1038,6 +1038,9 @@ func (a *App) DBQueryMulti(config connection.ConnectionConfig, dbName string, qu
 		logger.Warnf("DBQueryMulti 原生多结果集返回空结果，将回退逐条执行：%s SQL片段=%q", formatConnSummary(runConfig), sqlSnippet(query))
 		results = nil
 	}
+	if useNativeMultiResult && results != nil {
+		normalizeNativeResultStatementIndexes(runConfig.Type, statements, results)
+	}
 
 	// 驱动支持多结果集，直接返回
 	if results != nil {
@@ -1276,6 +1279,33 @@ func (a *App) DBQueryMulti(config connection.ConnectionConfig, dbName string, qu
 	return connection.QueryResult{Success: true, Data: resultSets, QueryID: queryID, Message: fallbackMsg}
 }
 
+func normalizeNativeResultStatementIndexes(dbType string, statements []string, results []connection.ResultSetData) {
+	if !isSQLServerDBType(dbType) || len(results) == 0 {
+		return
+	}
+	hasExplicitStatementIndex := false
+	for _, result := range results {
+		if result.StatementIndex > 0 {
+			hasExplicitStatementIndex = true
+			break
+		}
+	}
+	if hasExplicitStatementIndex {
+		return
+	}
+
+	switch {
+	case len(statements) <= 1:
+		for idx := range results {
+			results[idx].StatementIndex = 1
+		}
+	case len(results) == len(statements):
+		for idx := range results {
+			results[idx].StatementIndex = idx + 1
+		}
+	}
+}
+
 func shouldUseNativeMultiResultBatch(dbType string, statements []string, allReadOnly bool) bool {
 	if allReadOnly {
 		return true

internal/app/methods_db_multi_test.go

@@ -1525,6 +1525,51 @@ func TestDBQueryMultiKeepsAllResultSetsFromSingleSQLServerStatement(t *testing.T
 	}
 }
 
+func TestDBQueryMultiNormalizesSingleSQLServerSelectAffectedRowsStatementIndex(t *testing.T) {
+	originalNewDatabaseFunc := newDatabaseFunc
+	t.Cleanup(func() {
+		newDatabaseFunc = originalNewDatabaseFunc
+	})
+
+	query := "select * from c_dddw"
+	fakeDB := &fakeBatchWriteDB{
+		multiResult: map[string][]connection.ResultSetData{
+			query: {
+				{
+					Rows:    []map[string]interface{}{{"dddwno": "001", "dddwlist": "demo"}},
+					Columns: []string{"dddwno", "dddwlist"},
+				},
+				{
+					Rows:    []map[string]interface{}{{"affectedRows": int64(846)}},
+					Columns: []string{"affectedRows"},
+				},
+			},
+		},
+		queryErr: map[string]error{},
+	}
+	newDatabaseFunc = func(dbType string) (db.Database, error) {
+		return fakeDB, nil
+	}
+
+	app := NewAppWithSecretStore(secretstore.NewUnavailableStore("test"))
+	config := connection.ConnectionConfig{Type: "sqlserver", Host: "127.0.0.1", Port: 1433, User: "sa"}
+
+	result := app.DBQueryMulti(config, "hydee", query, "sqlserver-select-affectedrows-index-test")
+	if !result.Success {
+		t.Fatalf("expected DBQueryMulti success, got failure: %s", result.Message)
+	}
+	resultSets, ok := result.Data.([]connection.ResultSetData)
+	if !ok {
+		t.Fatalf("expected []connection.ResultSetData, got %T", result.Data)
+	}
+	if len(resultSets) != 2 {
+		t.Fatalf("expected two result sets, got %#v", resultSets)
+	}
+	if resultSets[0].StatementIndex != 1 || resultSets[1].StatementIndex != 1 {
+		t.Fatalf("expected select result and trailing affectedRows result to share statementIndex=1, got %#v", resultSets)
+	}
+}
+
 func TestDBQueryMultiTreatsBareSQLServerProcedureCallAsQueryFirst(t *testing.T) {
 	originalNewDatabaseFunc := newDatabaseFunc
 	t.Cleanup(func() {