feat[Go]: implement /api/v1/system/status GET (#15348)

### What problem does this PR solve?

As title

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)
- [x] New Feature (non-breaking change which adds functionality)
- [x] Refactoring

internal/handler/connector.go

@@ -173,6 +173,9 @@ func (h *ConnectorHandler) ListLogs(c *gin.Context) {
 		jsonError(c, code, err.Error())
 		return
 	}
+	if logs == nil {
+		logs = []*entity.ConnectorSyncLog{}
+	}
 
 	c.JSON(http.StatusOK, gin.H{
 		"code":    common.CodeSuccess,

internal/handler/connector_test.go

@@ -199,6 +199,7 @@ func TestConnectorHandlerListLogs(t *testing.T) {
 		wantMsg   string
 		wantTotal float64
 		wantLogID string
+		wantLogs  int
 	}{
 		{
 			name: "success",
@@ -225,6 +226,17 @@ func TestConnectorHandlerListLogs(t *testing.T) {
 			wantCode:  common.CodeSuccess,
 			wantTotal: 1,
 			wantLogID: "log-1",
+			wantLogs:  1,
+		},
+		{
+			name: "empty logs",
+			service: fakeConnectorService{
+				logs:  nil,
+				total: 0,
+			},
+			wantCode:  common.CodeSuccess,
+			wantTotal: 0,
+			wantLogs:  0,
 		},
 		{
 			name:     "unauthorized",
@@ -266,10 +278,23 @@ func TestConnectorHandlerListLogs(t *testing.T) {
 					t.Fatalf("total=%v body=%v", data["total"], body)
 				}
 				logs := data["logs"].([]interface{})
+				if len(logs) != tt.wantLogs {
+					t.Fatalf("logs=%v body=%v", logs, body)
+				}
 				if logs[0].(map[string]interface{})["id"] != tt.wantLogID {
 					t.Fatalf("logs=%v body=%v", logs, body)
 				}
 			}
+			if tt.wantLogID == "" && tt.wantMsg == "" {
+				data := body["data"].(map[string]interface{})
+				if data["total"] != tt.wantTotal {
+					t.Fatalf("total=%v body=%v", data["total"], body)
+				}
+				logs := data["logs"].([]interface{})
+				if len(logs) != tt.wantLogs {
+					t.Fatalf("logs=%v body=%v", logs, body)
+				}
+			}
 		})
 	}
 }

internal/handler/system.go

@@ -115,6 +115,27 @@ func (h *SystemHandler) GetConfigs(c *gin.Context) {
 	})
 }
 
+// GetStatus get RAGFlow status
+func (h *SystemHandler) GetStatus(c *gin.Context) {
+	_, errorCode, errorMessage := GetUser(c)
+	if errorCode != common.CodeSuccess {
+		jsonError(c, errorCode, errorMessage)
+		return
+	}
+
+	status, err := h.systemService.GetStatus()
+	if err != nil {
+		jsonError(c, common.CodeServerError, err.Error())
+		return
+	}
+
+	c.JSON(http.StatusOK, gin.H{
+		"code":    common.CodeSuccess,
+		"data":    status,
+		"message": "success",
+	})
+}
+
 // GetVersion get RAGFlow version
 // @Summary Get RAGFlow Version
 // @Description Get the current version of the application