v0.6.2: 仪表盘布局重构 + 每日趋势折线图 + OpenCode Go/Zen 预设

仪表盘:
- 新增每日用量趋势折线图（Token/缓存命中率/请求数三线）
- 用量趋势 Tab 组（每日/模型/供应商模型）与模型表格同行等高
- 热力图独立整行，格子放大 16px
- 折线图坐标轴文字改 HTML 覆盖层（修复 SVG 拉伸变形）
- 表格 border-collapse + 行线与边框同色
- 模型表格估算标签行内显示（行高统一）
- 最近请求容器 max-h 限制
- 页脚归属放内容流末尾

模型唯一性:
- 获取模型列表时自动勾选已存在模型 + 已添加徽章
- 批量添加跳过同供应商已存在 model id
- onBulkAdd 同供应商 model id 去重

新增预设:
- OpenCode Go（套餐 subscription，带推荐链接）
- OpenCode Zen（按量 pay_as_you_go）

折线图优化:
- 缓存命中率 0-1 映射修复
- 请求数默认显示
- 直线连接 + 渐变填充

src/i18n/zh.ts

@@ -71,6 +71,7 @@ export const zhTranslations = {
   fetchingModels: "获取中...",
   discoveredModels: "发现 {count} 个模型",
   addSelected: "添加选中的",
+  alreadyAdded: "已添加",
   displayName: "显示名称",
   actualModel: "实际请求模型",
   contextSize: "上下文长度",
@@ -278,6 +279,7 @@ export const zhTranslations = {
   cardDailyTrendSubCapped: "近 30 天 · 共 {n} 天",
   tabModelTrend: "模型用量趋势",
   tabProviderTrend: "供应商模型用量趋势",
+  tabDailyTrend: "每日用量趋势",
   providerUnknown: "未知供应商",
   cardDailyTrendSub: "共 {n} 天",
   cardModelUsage: "模型用量",
@@ -334,10 +336,13 @@ export const zhTranslations = {
   presetNameKimiCoding: "Kimi For Coding",
   presetNameMoonshot: "Moonshot 平台",
   presetNameDeepseek: "DeepSeek",
-  presetNameZhipu: "智谱 GLM",
-  presetNameZai: "z.ai（智谱海外）",
+  presetNameZhipuApi: "智谱 GLM（按量）",
+  presetNameZhipuCoding: "智谱 GLM Coding Plan",
+  presetNameZaiApi: "z.ai（按量）",
+  presetNameZaiCoding: "z.ai Coding Plan",
   presetNameBailian: "阿里百炼",
   presetNameMinimax: "MiniMax",
+  presetNameMinimaxTokenPlan: "MiniMax Token Plan",
   presetNameStepfun: "阶跃星辰",
   presetNameSiliconflow: "硅基流动",
   presetNameNovita: "Novita AI",
@@ -345,6 +350,8 @@ export const zhTranslations = {
   presetNameOpenai: "OpenAI 官方",
   presetNameGoogleGenai: "Google AI Studio",
   presetNameVolcengine: "火山方舟",
+  presetNameOpencodeGo: "OpenCode Go",
+  presetNameOpencodeZen: "OpenCode Zen",
 
   // Provider usage
   usageBalance: "余额",
@@ -358,6 +365,23 @@ export const zhTranslations = {
   usageResetIn: "{time} 后重置",
   usageResetDone: "已重置",
   usageLoading: "查询中…",
+
+  // Billing mode (套餐 / 按量)
+  billingTabSubscription: "套餐",
+  billingTabPayAsYouGo: "按量",
+  billingTabAll: "全部",
+  billingBadgeSubscription: "套餐",
+  billingBadgePayAsYouGo: "按量",
+
+  // Usage trend line chart
+  trendLineTitle: "用量趋势",
+  trendLineSub: "最近 {n} 天",
+  trendLineLegendTokens: "Token 用量",
+  trendLineLegendCacheHit: "缓存命中率",
+  trendLineLegendRequests: "请求数",
+  trendLineShowRequests: "显示请求数",
+  trendLineTooltip: "{date}\nToken: {tokens}\n命中率: {cache}\n请求: {req}",
+  trendLineNoData: "暂无数据",
 } as const;
 
 export type TranslationKey = keyof typeof zhTranslations;