fix: import block syntax in split dashboard files

- Add missing closing ) in clients.go, providers_admin.go, users.go, system.go
- Add SetTimeout(30s) to OpenAI provider (was resty.New() with no timeout)

internal/providers/openai.go

@@ -2,26 +2,26 @@ package providers
 
 import (
 	"context"
-	"time"
 	"encoding/json"
 	"fmt"
 	"strings"
+	"time"
 
+	"github.com/go-resty/resty/v2"
 	"gophergate/internal/config"
 	"gophergate/internal/models"
-	"github.com/go-resty/resty/v2"
 )
 
 type OpenAIProvider struct {
-	client  *resty.Client
-	config  config.OpenAIConfig
-	apiKey  string
+	client *resty.Client
+	config config.OpenAIConfig
+	apiKey string
 }
 
 func NewOpenAIProvider(cfg config.OpenAIConfig, apiKey string) *OpenAIProvider {
 	return &OpenAIProvider{
-		client:  resty.New(),
-		config:  cfg,
+		client: resty.New().SetTimeout(30 * time.Second),
+		config: cfg,
 		apiKey: apiKey,
 	}
 }
@@ -100,7 +100,7 @@ func (p *OpenAIProvider) ChatCompletionStream(ctx context.Context, req *models.U
 	}
 
 	ch := make(chan *models.ChatCompletionStreamResponse)
-	
+
 	go func() {
 		defer close(ch)
 		err := StreamOpenAI(resp.RawBody(), ch)