diff --git a/docs/pending-test.md b/docs/pending-test.md
index bcab4b0..ea3d339 100644
--- a/docs/pending-test.md
+++ b/docs/pending-test.md
@@ -1 +1,3 @@
 # 待测试
+
+- 修复生图工作台和画布生图请求中 `quality` 参数可能传入上游不支持值导致 400 的问题；请求前会归一化质量枚举，`auto` 或异常值不再发送给上游。
diff --git a/web/src/services/api/image.ts b/web/src/services/api/image.ts
index 05925d9..b5a1d4c 100644
--- a/web/src/services/api/image.ts
+++ b/web/src/services/api/image.ts
@@ -23,7 +23,20 @@ const QUALITY_BASE: Record<string, number> = {
     low: 1024,
     medium: 2048,
     high: 2880,
+    standard: 1024,
+    hd: 2048,
 };
+const QUALITY_ALIASES: Record<string, string> = {
+    "1k": "low",
+    "2k": "medium",
+    "4k": "high",
+};
+
+function normalizeQuality(quality: string) {
+    const value = quality.trim().toLowerCase();
+    const normalized = QUALITY_ALIASES[value] || value;
+    return QUALITY_BASE[normalized] ? normalized : undefined;
+}
 
 /** Map "quality + ratio" to an explicit pixel dimension like "3840x2160". Returns undefined when quality is auto. */
 function resolveSize(quality: string, ratio: string): string | undefined {
@@ -132,7 +145,8 @@ function withSystemMessage(config: AiConfig, messages: ChatCompletionMessage[])
 
 export async function requestGeneration(config: AiConfig, prompt: string) {
     const n = Math.max(1, Math.min(15, Math.floor(Math.abs(Number(config.count)) || 1)));
-    const pixelSize = resolveSize(config.quality, config.size);
+    const quality = normalizeQuality(config.quality);
+    const pixelSize = quality ? resolveSize(quality, config.size) : undefined;
     try {
         const response = await axios.post<ImageApiResponse>(
             aiApiUrl(config, "/images/generations"),
@@ -140,7 +154,8 @@ export async function requestGeneration(config: AiConfig, prompt: string) {
                 model: config.model,
                 prompt: withSystemPrompt(config, prompt),
                 n,
-                ...(pixelSize ? { quality: config.quality, size: pixelSize } : {}),
+                ...(quality ? { quality } : {}),
+                ...(pixelSize ? { size: pixelSize } : {}),
                 response_format: "b64_json",
             },
             {
@@ -157,14 +172,17 @@ export async function requestGeneration(config: AiConfig, prompt: string) {
 
 export async function requestEdit(config: AiConfig, prompt: string, references: ReferenceImage[]) {
     const n = Math.max(1, Math.min(15, Math.floor(Math.abs(Number(config.count)) || 1)));
-    const pixelSize = resolveSize(config.quality, config.size);
+    const quality = normalizeQuality(config.quality);
+    const pixelSize = quality ? resolveSize(quality, config.size) : undefined;
     const formData = new FormData();
     formData.set("model", config.model);
     formData.set("prompt", withSystemPrompt(config, prompt));
     formData.set("n", String(n));
     formData.set("response_format", "b64_json");
+    if (quality) {
+        formData.set("quality", quality);
+    }
     if (pixelSize) {
-        formData.set("quality", config.quality);
         formData.set("size", pixelSize);
     }
     const files = await Promise.all(references.map(async (image) => dataUrlToFile({ ...image, dataUrl: await imageToDataUrl(image) })));