feat(usage): 订阅套餐计价修正 + 识图能力可编辑 + 单套餐用量显示修复

- 订阅套餐零价条目按官方付费模型计价（zhipuai-coding-plan/glm-5.2 → zhipuai/glm-5.2 牌价）
- -highspeed / -free 派生变体自动回退到基础模型价格；Kimi For Coding 无牌价时按旗舰 kimi-k3 估算
- 设置页：image_in 识图能力可手动编辑，原生多模态模型不再提示 kimi-eyes 插件
- 修复仅单个套餐档位时用量卡片不显示的问题
- kimi usages 响应异常时透出原始返回（仅用量数字），便于对照接口排查
- models.dev 价格快照同步

src/components/UsageFooter.tsx

@@ -357,7 +357,9 @@ export function UsageFooter({
   // success, or error/loading with last-good data (ghost).
   // Compact header already shows the primary entry; detail only adds value
   // when there are multiple tiers (e.g. 5h + weekly) or on error ghost.
-  if (data.length <= 1 && status === "success") return null;
+  // NOTE: single-tier plans (e.g. only five_hour) must still render — hiding
+  // them made kimi-for-coding look like it had no plan quota at all.
+  if (data.length === 0 && status === "success") return null;
   const ghost = status !== "success";
   return (
     <div