模板导出增强 + 模特性别分组 + 三合一提示词精简

1) 模板导出：识别「基码表-胸围」填 sku.bust（多个胸围列都填）；申报价格模糊匹配多列统一按加价后价格填写；详情图文不再拼接 img_url_2；SPU 款式来源统一填「现货款」；商品产地国家简称映射（沙特→沙特阿拉伯）
2) 模特性别分组：model_features 按男女分组，按模板类目含男/女固定取对应性别模特（含 Pinterest 模式 pipeline）
3) 三合一提示词：去掉 DESIGN CONTENT 四要素描述（设计已由设计稿提供）
4) 生图尺寸：全部改为读 config 不再硬编码（设计图 compose.design_size / 合成图 compose.size / 种草图 seed_shot.size）

configs/pinterest/MX.yaml

@@ -41,3 +41,42 @@ seeds:
   - tropical birds
   - mexican handcraft
   - mexican minimal
+  - mexican monarch butterfly
+  - mexican hummingbird
+  - mexican coyote
+  - mexican wolf
+  - mexican fox
+  - mexican deer
+  - mexican armadillo
+  - mexican iguana
+  - mexican sea turtle
+  - mexican dolphin
+  - mexican whale
+  - mexican starfish
+  - mexican seahorse
+  - mexican octopus
+  - mexican aloe
+  - mexican yucca
+  - mexican avocado
+  - mexican chili
+  - mexican corn
+  - mexican tortilla
+  - mexican tamale
+  - mexican taco
+  - mexican guacamole
+  - mexican vanilla
+  - mexican piñata
+  - mexican maracas
+  - mexican huipil
+  - mexican rebozo
+  # —— 节日主题（适合印花，避开宗教人物/国旗/酒精/猪等敏感项）——
+  - dia de los muertos
+  - cinco de mayo
+  - independence fiesta
+  - christmas posada
+  - new year fireworks
+  - easter eggs
+  - valentine hearts
+  - mother's day flowers
+  - summer fiesta
+  - autumn harvest