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/en.ts

@@ -73,6 +73,7 @@ export const enTranslations: Record<TranslationKey, string> = {
   fetchingModels: "Fetching...",
   discoveredModels: "Discovered {count} models",
   addSelected: "Add selected",
+  alreadyAdded: "Added",
   displayName: "Display name",
   actualModel: "Actual model",
   contextSize: "Context size",
@@ -283,6 +284,7 @@ export const enTranslations: Record<TranslationKey, string> = {
   cardDailyTrendSubCapped: "Last 30 days · {n} days total",
   tabModelTrend: "Model usage trend",
   tabProviderTrend: "Provider–model usage trend",
+  tabDailyTrend: "Daily usage trend",
   providerUnknown: "Unknown provider",
   cardDailyTrendSub: "{n} days",
   cardModelUsage: "Model usage",
@@ -339,10 +341,13 @@ export const enTranslations: Record<TranslationKey, string> = {
   presetNameKimiCoding: "Kimi For Coding",
   presetNameMoonshot: "Moonshot Platform",
   presetNameDeepseek: "DeepSeek",
-  presetNameZhipu: "Zhipu GLM",
-  presetNameZai: "z.ai (Zhipu Global)",
+  presetNameZhipuApi: "Zhipu GLM (Pay-as-you-go)",
+  presetNameZhipuCoding: "Zhipu GLM Coding Plan",
+  presetNameZaiApi: "z.ai (Pay-as-you-go)",
+  presetNameZaiCoding: "z.ai Coding Plan",
   presetNameBailian: "Alibaba Bailian",
   presetNameMinimax: "MiniMax",
+  presetNameMinimaxTokenPlan: "MiniMax Token Plan",
   presetNameStepfun: "StepFun",
   presetNameSiliconflow: "SiliconFlow",
   presetNameNovita: "Novita AI",
@@ -350,6 +355,8 @@ export const enTranslations: Record<TranslationKey, string> = {
   presetNameOpenai: "OpenAI",
   presetNameGoogleGenai: "Google AI Studio",
   presetNameVolcengine: "Volcengine Ark",
+  presetNameOpencodeGo: "OpenCode Go",
+  presetNameOpencodeZen: "OpenCode Zen",
 
   // Provider usage
   usageBalance: "Balance",
@@ -363,4 +370,21 @@ export const enTranslations: Record<TranslationKey, string> = {
   usageResetIn: "resets in {time}",
   usageResetDone: "reset",
   usageLoading: "Querying…",
+
+  // Billing mode (subscription / pay-as-you-go)
+  billingTabSubscription: "Subscription",
+  billingTabPayAsYouGo: "Pay-as-you-go",
+  billingTabAll: "All",
+  billingBadgeSubscription: "Plan",
+  billingBadgePayAsYouGo: "PAYG",
+
+  // Usage trend line chart
+  trendLineTitle: "Usage Trend",
+  trendLineSub: "last {n} days",
+  trendLineLegendTokens: "Token usage",
+  trendLineLegendCacheHit: "Cache hit rate",
+  trendLineLegendRequests: "Requests",
+  trendLineShowRequests: "Show requests",
+  trendLineTooltip: "{date}\nTokens: {tokens}\nCache hit: {cache}\nRequests: {req}",
+  trendLineNoData: "No data",
 };