修正图片脚本中误导性的首选模型变量名

- generate-anthro-cat-illustrations 的 preferredImageModel 重命名为 imageModel，并同步 requestImagePayload 与试运行请求体引用
- generate-template-samples 的 preferredImageModel 重命名为 imageModel，并同步 requestImagePayload 与试运行请求体引用

.codex/skills/gpt-image-2-apimart/scripts/generate-anthro-cat-illustrations.mjs

@@ -11,7 +11,7 @@ const defaultOutDir = path.join(repoRoot, 'public', 'anthro-cat-illustrations');
 const defaultTimeoutMs = 1000000;
 // GPT Image 2.5 生成任务只接受 concrete provider model；业务模型名 `gpt-image-2.5`
 // 由 server-rs 在任务边界解析，脚本直连 provider 时必须自己给出 concrete key。
-const preferredImageModel = 'gpt-image-2.5-flare-c';
+const imageModel = 'gpt-image-2.5-flare-c';
 
 const prompts = [
   {
@@ -258,7 +258,7 @@ async function fetchJson(url, options, timeoutMs) {
 }
 
 async function requestImagePayload(env, entry) {
-  const model = preferredImageModel;
+  const model = imageModel;
   const requestBody = {
     model,
     prompt: buildPrompt(entry),
@@ -364,7 +364,7 @@ if (dryRun) {
           id: entry.id,
           title: entry.title,
           body: {
-            model: preferredImageModel,
+            model: imageModel,
             prompt: buildPrompt(entry),
             n: 1,
             size: '1024x1024',

.codex/skills/gpt-image-2-apimart/scripts/generate-template-samples.mjs

@@ -20,7 +20,7 @@ const defaultOutDir = path.join(
 const defaultTimeoutMs = 1000000;
 // GPT Image 2.5 生成任务只接受 concrete provider model；业务模型名 `gpt-image-2.5`
 // 由 server-rs 在任务边界解析，脚本直连 provider 时必须自己给出 concrete key。
-const preferredImageModel = 'gpt-image-2.5-flare-c';
+const imageModel = 'gpt-image-2.5-flare-c';
 
 const args = new Map();
 for (let index = 2; index < process.argv.length; index += 1) {
@@ -228,7 +228,7 @@ async function fetchJson(url, options, timeoutMs) {
 }
 
 async function requestImagePayload(env, template) {
-  const model = preferredImageModel;
+  const model = imageModel;
   const requestBody = {
     model,
     prompt: buildPrompt(template),
@@ -338,7 +338,7 @@ if (dryRun) {
           id: template.id,
           title: template.title,
           body: {
-            model: preferredImageModel,
+            model: imageModel,
             prompt: buildPrompt(template),
             n: 1,
             size: '1024x1024',