fix: default planned episode count to one

src/features/projects/components/CreateProjectDialog.vue

@@ -14,7 +14,7 @@ const emit = defineEmits<{ created: [projectId: string] }>()
 const open = ref(false)
 const busy = ref(false)
 const error = ref('')
-const form = reactive({ topic: '', style: '', episodeCount: 3 })
+const form = reactive({ topic: '', style: '', episodeCount: 1 })
 
 /** 校验正整数集数和主题，禁止双击产生重复项目。 */
 async function submit() {
@@ -92,7 +92,7 @@ const rules = { topic: requiredTextRule('故事主题'), episodeCount: integerRu
                 ></NFormItem>
             </div>
             <p class="text-xs leading-5 text-muted">
-                建议先用 3 集验证生成效果。生成会实际调用后端模型，产生相应费用。
+                建议先用 1 集验证生成效果。生成会实际调用后端模型，产生相应费用。
             </p>
             <NAlert v-if="error" role="alert" type="error" :show-icon="false" class=" ">{{ error }}</NAlert>
             <div class="dialog-footer">