更新主站 GPT Image 2.5 生成边界

将 GPT 专用新任务与锁定模型切换为 gpt-image-2.5

保留 nanobanana 普通生成默认行为

将历史 gpt-image-2 与 gpt-image-2-c 归一并触发参数回退告警

src/components/image-editor/ImageCanvasGenerationModel.ts

@@ -44,6 +44,7 @@ import {
 
 // 中文注释：与 api-server/src/editor_generation_config.rs 保持同名模型定价语义，前端仅作为展示兜底。
 export const IMAGE_MODEL_GPT_IMAGE_2 = 'gpt-image-2';
+export const IMAGE_MODEL_GPT_IMAGE_2_C = 'gpt-image-2-c';
 export const IMAGE_MODEL_GPT_IMAGE_2_5 = 'gpt-image-2.5';
 export const IMAGE_MODEL_NANOBANANA2 = 'gemini-3.1-flash-image-preview';
 export const DEFAULT_IMAGE_MODEL = IMAGE_MODEL_NANOBANANA2;
@@ -638,9 +639,23 @@ export function normalizeEditorImageModel(model: string | null | undefined) {
   if (IMAGE_MODEL_NANOBANANA_ALIASES.has(normalizedModel)) {
     return IMAGE_MODEL_NANOBANANA2;
   }
+  if (
+    normalizedModel === IMAGE_MODEL_GPT_IMAGE_2 ||
+    normalizedModel === IMAGE_MODEL_GPT_IMAGE_2_C
+  ) {
+    return IMAGE_MODEL_GPT_IMAGE_2_5;
+  }
   return normalizedModel;
 }
 
+export function isLegacyEditorImageModel(model: string | null | undefined) {
+  const normalizedModel = model?.trim();
+  return (
+    normalizedModel === IMAGE_MODEL_GPT_IMAGE_2 ||
+    normalizedModel === IMAGE_MODEL_GPT_IMAGE_2_C
+  );
+}
+
 export function getEditorImageModelDisplayName(
   model: string | null | undefined,
 ) {
@@ -1398,6 +1413,7 @@ export function decodeCanvasGenerationInputs(
     defaultAspectRatio: string;
     fixedAspectRatios?: readonly string[];
   }) => {
+    const rawModel = fields.find((field) => field.id === 'model')?.value;
     const imageModels = EDITOR_IMAGE_MODEL_OPTIONS.map(
       (option) => option.value,
     );
@@ -1408,6 +1424,9 @@ export function decodeCanvasGenerationInputs(
       defaultModel,
       normalizeEditorImageModel,
     );
+    if (typeof rawModel === 'string' && isLegacyEditorImageModel(rawModel)) {
+      addFallbackWarning(['model']);
+    }
     const dimensions =
       EDITOR_IMAGE_DIMENSION_OPTIONS[
         model as keyof typeof EDITOR_IMAGE_DIMENSION_OPTIONS