refactor(config): 精简 image_gen 配置为 OpenAI 兼容同步 API

- 移除 yuntts 异步字段: aspect_ratio / x_channel / poll_max_wait / poll_interval
- 改用标准 OpenAI Images API 字段: width / height / quality
- 默认 base_url 改为 api.suchuang.vip/v1
- 模型默认值: gpt-image-2-token（此模型在 suchuang 上需换 gpt-image-1）

backend/.env.example

@@ -19,12 +19,10 @@ GEN2D_LLM_MODEL=gpt-4o
 GEN2D_LLM_TEMPERATURE=0.7
 GEN2D_LLM_MAX_TOKENS=2048
 
-# 文生图模型（GPT Image 2 异步 API，如 yuntts 等兼容服务）
+# 文生图模型（OpenAI 兼容 Images API）
-GEN2D_IMAGE_BASE_URL=https://www.yuntts.com/api/v1
+GEN2D_IMAGE_BASE_URL=https://api.suchuang.vip/v1
 GEN2D_IMAGE_API_KEY=
-GEN2D_IMAGE_MODEL=gpt-image-2
+GEN2D_IMAGE_MODEL=gpt-image-2-token
+GEN2D_IMAGE_WIDTH=1024
+GEN2D_IMAGE_HEIGHT=1024
 GEN2D_IMAGE_QUALITY=low
-GEN2D_IMAGE_ASPECT_RATIO=1:1
-GEN2D_IMAGE_X_CHANNEL=default
-GEN2D_IMAGE_POLL_MAX_WAIT=120
-GEN2D_IMAGE_POLL_INTERVAL=3

backend/internal/config/config.go

@@ -43,16 +43,14 @@ type LLMConfig struct {
 	MaxTokens   int     `mapstructure:"max_tokens"`
 }
 
-// ImageGenConfig GPT Image 2 异步生图模型配置。
+// ImageGenConfig OpenAI 兼容文生图模型配置。
 type ImageGenConfig struct {
 	BaseURL string `mapstructure:"base_url"`
 	APIKey  string `mapstructure:"api_key"`
 	Model   string `mapstructure:"model"`
+	Width   int    `mapstructure:"width"`
+	Height  int    `mapstructure:"height"`
 	Quality string `mapstructure:"quality"`
-	AspectRatio  string `mapstructure:"aspect_ratio"`
-	XChannel     string `mapstructure:"x_channel"`
-	PollMaxWait  int    `mapstructure:"poll_max_wait"`
-	PollInterval int    `mapstructure:"poll_interval"`
 }
 
 // Load 从 YAML 配置文件和环境变量加载配置。
@@ -103,14 +101,12 @@ func setDefaults(v *viper.Viper) {
 	v.SetDefault("llm.temperature", 0.7)
 	v.SetDefault("llm.max_tokens", 2048)
 
-	v.SetDefault("image_gen.base_url", "https://www.yuntts.com/api/v1")
+	v.SetDefault("image_gen.base_url", "https://api.suchuang.vip/v1")
 	v.SetDefault("image_gen.api_key", "")
-	v.SetDefault("image_gen.model", "gpt-image-2")
+	v.SetDefault("image_gen.model", "gpt-image-2-token")
+	v.SetDefault("image_gen.width", 1024)
+	v.SetDefault("image_gen.height", 1024)
 	v.SetDefault("image_gen.quality", "low")
-	v.SetDefault("image_gen.aspect_ratio", "1:1")
-	v.SetDefault("image_gen.x_channel", "default")
-	v.SetDefault("image_gen.poll_max_wait", 120)
-	v.SetDefault("image_gen.poll_interval", 3)
 }
 
 func bindEnvVars(v *viper.Viper) {
@@ -130,9 +126,7 @@ func bindEnvVars(v *viper.Viper) {
 	v.BindEnv("image_gen.base_url", "GEN2D_IMAGE_BASE_URL")
 	v.BindEnv("image_gen.api_key", "GEN2D_IMAGE_API_KEY")
 	v.BindEnv("image_gen.model", "GEN2D_IMAGE_MODEL")
+	v.BindEnv("image_gen.width", "GEN2D_IMAGE_WIDTH")
+	v.BindEnv("image_gen.height", "GEN2D_IMAGE_HEIGHT")
 	v.BindEnv("image_gen.quality", "GEN2D_IMAGE_QUALITY")
-	v.BindEnv("image_gen.aspect_ratio", "GEN2D_IMAGE_ASPECT_RATIO")
-	v.BindEnv("image_gen.x_channel", "GEN2D_IMAGE_X_CHANNEL")
-	v.BindEnv("image_gen.poll_max_wait", "GEN2D_IMAGE_POLL_MAX_WAIT")
-	v.BindEnv("image_gen.poll_interval", "GEN2D_IMAGE_POLL_INTERVAL")
 }

backend/internal/config/config.yml

@@ -21,11 +21,9 @@ llm:
   max_tokens: 2048
 
 image_gen:
-  base_url: "https://www.yuntts.com/api/v1"
+  base_url: "https://api.suchuang.vip/v1"
   api_key: ""
-  model: "gpt-image-2"
+  model: "gpt-image-2-token"
+  width: 1024
+  height: 1024
   quality: "low"
-  aspect_ratio: "1:1"
-  x_channel: "default"
-  poll_max_wait: 120
-  poll_interval: 3