feat(dashboard): 用量统计新增「昨天」范围 + 跨供应商「模型用量统计」选项卡

- 范围新增 yesterday：本地时区昨日 0 点 ~ 今日 0 点，range_end 引入上界过滤
- RangeStats 新增 modelsByName：按裸模型名聚合，同一模型跨供应商合并，
  子代理记录归入 __secondary__ 单独成行，按 Token 降序
- 趋势选项卡第 4 个 tab「模型用量统计」：新增 ModelTotalsChart 横向条形图，
  悬停显示请求数/Token/缓存命中/费用
- 概览卡网格扩展为 5 张；i18n 中英同步
- 顺带：pricing 测试基准从已下架的 moonshotai/kimi-k2.5 切换到 kimi-k3

src/components/dashboard/ModelTotalsChart.tsx

@@ -0,0 +1,73 @@
+import { useTranslation } from "../../i18n";
+import { useCurrency } from "../../hooks/useCurrency";
+import { fmtInt, fmtPct, fmtTokens } from "../../lib/dashboard-format";
+import { modelColor } from "./DailyBars";
+import type { ModelRow } from "../../types/dashboard";
+
+interface ModelTotalsChartProps {
+  /** Provider-agnostic model totals, pre-sorted by totalTokens desc. */
+  rows: ModelRow[];
+}
+
+/** Horizontal ranked bars: one row per bare model name, providers merged. */
+export function ModelTotalsChart({ rows }: ModelTotalsChartProps) {
+  const { t } = useTranslation();
+  const { money } = useCurrency();
+
+  if (!rows.length) {
+    return (
+      <div className="flex h-48 items-center justify-center text-sm text-content-muted">
+        {t("noData")}
+      </div>
+    );
+  }
+
+  const max = Math.max(...rows.map((m) => m.totalTokens || 0), 1);
+
+  return (
+    <div className="flex h-full flex-col gap-1 overflow-y-auto">
+      {rows.map((m, i) => {
+        const color = i < 10 ? modelColor(i) : "#6b7280";
+        const name = m.isSecondary ? t("subagentModel") : m.modelDisplay || m.model;
+        const tooltip = [
+          name,
+          `${t("kpiRequests")}: ${fmtInt(m.requests)}`,
+          `${t("totalTokens")}: ${fmtInt(m.totalTokens)}`,
+          `${t("colCacheHit")}: ${fmtPct(m.cacheHitRate)}`,
+          `${t("cost")}: ${money(m.costUsd)}`,
+        ].join("\n");
+
+        return (
+          <div
+            key={m.model}
+            title={tooltip}
+            className="group flex items-center gap-2 rounded px-1 py-1 cursor-help hover:bg-hover"
+          >
+            <span
+              className="inline-block h-2.5 w-2.5 rounded-sm shrink-0"
+              style={{ backgroundColor: color }}
+            />
+            <span className="w-40 shrink-0 truncate text-xs text-content-primary">
+              {name}
+              {m.costEstimated && (
+                <span className="ml-1 text-[10px] text-yellow-600">({t("estimate")})</span>
+              )}
+            </span>
+            <div className="flex h-4 flex-1 items-center overflow-hidden rounded-sm bg-hover-2/50">
+              <div
+                className="h-full rounded-sm transition-[width] group-hover:opacity-85"
+                style={{
+                  width: `${Math.max(2, (m.totalTokens / max) * 100)}%`,
+                  backgroundColor: color,
+                }}
+              />
+            </div>
+            <span className="w-16 shrink-0 text-right text-xs text-content-muted">
+              {fmtTokens(m.totalTokens)}
+            </span>
+          </div>
+        );
+      })}
+    </div>
+  );
+}