feat: Adapt to the Qwen multimodal model generation API (#1221)

plugins/wasm-go/extensions/ai-proxy/provider/gemini.go

@@ -4,13 +4,14 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"strings"
+	"time"
+
 	"github.com/alibaba/higress/plugins/wasm-go/extensions/ai-proxy/util"
 	"github.com/alibaba/higress/plugins/wasm-go/pkg/wrapper"
 	"github.com/google/uuid"
 	"github.com/higress-group/proxy-wasm-go-sdk/proxywasm"
 	"github.com/higress-group/proxy-wasm-go-sdk/proxywasm/types"
-	"strings"
-	"time"
 )
 
 // geminiProvider is the provider for google gemini/gemini flash service.
@@ -378,7 +379,7 @@ func (g *geminiProvider) buildGeminiChatRequest(request *chatCompletionRequest)
 			Role: message.Role,
 			Parts: []geminiPart{
 				{
-					Text: message.Content,
+					Text: message.StringContent(),
 				},
 			},
 		}