test: align preset tests with Kimi K2.7 and Fable model tiers

Update the Codex chat preset test's Kimi expectation (kimi-k2.6 -> kimi-k2.7-code) after the Kimi K2.7 upgrade, update the Claude Desktop form test for the four-tier (Sonnet/Opus/Fable/Haiku) routes, and reformat UsageDateRangePicker imports (prettier).

src/components/usage/UsageDateRangePicker.tsx

@@ -1,6 +1,11 @@
 import { useEffect, useMemo, useState } from "react";
 import { useTranslation } from "react-i18next";
-import { CalendarDays, ChevronDown, ChevronLeft, ChevronRight } from "lucide-react";
+import {
+  CalendarDays,
+  ChevronDown,
+  ChevronLeft,
+  ChevronRight,
+} from "lucide-react";
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
 import {