feat(upload): integrate upload service for chat image validation and S3 uploads

- Added UploadService to handle image uploads and validation for chat messages.
- Updated ChatService and MessageService to utilize UploadService for validating image segments in messages.
- Enhanced wire generation to inject UploadService into relevant services.
- Introduced UploadImageBytes method in UploadService for uploading images directly from memory.
- Added TrustedPublicURLPrefix method in S3 Client for generating public URLs for uploaded images.

internal/pkg/s3/s3.go

@@ -88,6 +88,18 @@ func (c *Client) UploadData(ctx context.Context, objectName string, data []byte,
 	return fmt.Sprintf("%s://%s/%s/%s", scheme, c.domain, c.bucket, objectName), nil
 }
 
+// TrustedPublicURLPrefix 本站公开对象 URL 前缀（scheme://domain/bucket/），用于校验聊天图片等仅引用本地上传资源。
+func (c *Client) TrustedPublicURLPrefix() string {
+	if c == nil || c.domain == "" || c.bucket == "" {
+		return ""
+	}
+	scheme := "https"
+	if c.domain == c.bucket {
+		scheme = "http"
+	}
+	return fmt.Sprintf("%s://%s/%s/", scheme, c.domain, c.bucket)
+}
+
 // GetURL 获取文件URL - 使用自定义域名
 func (c *Client) GetURL(ctx context.Context, objectName string) (string, error) {
 	// 使用自定义域名构建URL，包含bucket名称