fix(app): localize provider usage plurals

packages/app/src/i18n/resources/ar.ts

@@ -1972,8 +1972,26 @@ export const ar: TranslationResources = {
     },
     duration: {
       days: "{{value}} يوم",
+      days_zero: "{{value}} يوم",
+      days_one: "يوم واحد",
+      days_two: "يومين",
+      days_few: "{{value}} أيام",
+      days_many: "{{value}} يومًا",
+      days_other: "{{value}} يوم",
       hours: "{{value}} ساعة",
+      hours_zero: "{{value}} ساعة",
+      hours_one: "ساعة واحدة",
+      hours_two: "ساعتين",
+      hours_few: "{{value}} ساعات",
+      hours_many: "{{value}} ساعة",
+      hours_other: "{{value}} ساعة",
       minutes: "{{value}} دقيقة",
+      minutes_zero: "{{value}} دقيقة",
+      minutes_one: "دقيقة واحدة",
+      minutes_two: "دقيقتين",
+      minutes_few: "{{value}} دقائق",
+      minutes_many: "{{value}} دقيقة",
+      minutes_other: "{{value}} دقيقة",
     },
     timing: {
       resettingNow: "تتم إعادة التعيين الآن",
@@ -1982,8 +2000,26 @@ export const ar: TranslationResources = {
       runsOutIn: "ينفد خلال {{duration}}",
       justNow: "الآن",
       daysAgo: "قبل {{value}} يومًا",
+      daysAgo_zero: "قبل {{value}} يوم",
+      daysAgo_one: "قبل يوم واحد",
+      daysAgo_two: "قبل يومين",
+      daysAgo_few: "قبل {{value}} أيام",
+      daysAgo_many: "قبل {{value}} يومًا",
+      daysAgo_other: "قبل {{value}} يوم",
       hoursAgo: "قبل {{value}} ساعة",
+      hoursAgo_zero: "قبل {{value}} ساعة",
+      hoursAgo_one: "قبل ساعة واحدة",
+      hoursAgo_two: "قبل ساعتين",
+      hoursAgo_few: "قبل {{value}} ساعات",
+      hoursAgo_many: "قبل {{value}} ساعة",
+      hoursAgo_other: "قبل {{value}} ساعة",
       minutesAgo: "قبل {{value}} دقيقة",
+      minutesAgo_zero: "قبل {{value}} دقيقة",
+      minutesAgo_one: "قبل دقيقة واحدة",
+      minutesAgo_two: "قبل دقيقتين",
+      minutesAgo_few: "قبل {{value}} دقائق",
+      minutesAgo_many: "قبل {{value}} دقيقة",
+      minutesAgo_other: "قبل {{value}} دقيقة",
       updated: "تم التحديث {{relativeTime}}",
     },
   },

packages/app/src/i18n/resources/en.ts

@@ -2913,4 +2913,18 @@ type WidenStringLeaves<T> = {
   [K in keyof T]: T[K] extends string ? string : WidenStringLeaves<T[K]>;
 };
 
-export type TranslationResources = WidenStringLeaves<typeof en>;
+type TranslationResourcesBase = WidenStringLeaves<typeof en>;
+type PluralCategory = "zero" | "one" | "two" | "few" | "many" | "other";
+type DurationPluralKey = `${"days" | "hours" | "minutes"}_${PluralCategory}`;
+type AgoPluralKey = `${"daysAgo" | "hoursAgo" | "minutesAgo"}_${PluralCategory}`;
+
+// i18next plural categories differ by locale, so locale catalogs may add the
+// explicit v4 suffixes they need while retaining the canonical fallback keys.
+export type TranslationResources = TranslationResourcesBase & {
+  providerUsage: TranslationResourcesBase["providerUsage"] & {
+    duration: TranslationResourcesBase["providerUsage"]["duration"] &
+      Partial<Record<DurationPluralKey, string>>;
+    timing: TranslationResourcesBase["providerUsage"]["timing"] &
+      Partial<Record<AgoPluralKey, string>>;
+  };
+};

packages/app/src/usage/format.test.ts

@@ -51,4 +51,20 @@ describe("formatAmount", () => {
     expect(formatRunsOutLabel(daysFromNow, NOW)).toBe("s’épuise dans 1\u202f234 j");
     expect(formatAgo(daysAgo, NOW)).toBe("il y a 1\u202f234 j");
   });
+
+  it("selects Arabic plural forms for relative durations", async () => {
+    await i18n.changeLanguage("ar");
+    const twoHoursFromNow = new Date(NOW + 2 * 60 * 60 * 1000).toISOString();
+    const threeHoursFromNow = new Date(NOW + 3 * 60 * 60 * 1000).toISOString();
+    const twoDaysAgo = new Date(NOW - 2 * 24 * 60 * 60 * 1000).toISOString();
+
+    expect(formatResetLabel(twoHoursFromNow)).toBe("تتم إعادة التعيين خلال ساعتين");
+    expect(formatRunsOutLabel(threeHoursFromNow)).toBe("ينفد خلال 3 ساعات");
+    expect(formatAgo(twoDaysAgo)).toBe("قبل يومين");
+  });
+
+  it("uses locale-aware compact notation for token balances", () => {
+    expect(formatAmount(1_234, "tokens", "en")).toBe("1.2K");
+    expect(formatAmount(1_234, "tokens", "ar")).toBe("1.2\u00a0ألف");
+  });
 });

packages/app/src/usage/format.ts

@@ -1,4 +1,3 @@
-import { formatTokenCount } from "@/components/context-window-meter.utils";
 import { i18n } from "@/i18n/i18next";
 import type { UsageDisplayAs } from "./preferences";
 import type { UsageBalanceUnit } from "./types";