Complete client UI i18n migration

Adds client-side i18n support, language settings, translated UI copy, and locale parity coverage.
2026-06-11 14:15:35 +08:00
parent 41cf070fd8
commit 08ebe5e7e1
199 changed files with 16426 additions and 1821 deletions
@@ -0,0 +1,32 @@
+import { describe, expect, it, vi } from "vitest";
+import { ensureI18nLanguageForRender } from "./sync-language";
+
+describe("ensureI18nLanguageForRender", () => {
+  it("changes the i18n language before callers render children", () => {
+    const calls: string[] = [];
+    const i18n = {
+      language: "en",
+      changeLanguage: (locale: string) => {
+        calls.push(locale);
+        i18n.language = locale;
+        return Promise.resolve();
+      },
+    };
+
+    ensureI18nLanguageForRender("zh-CN", i18n);
+
+    expect(i18n.language).toBe("zh-CN");
+    expect(calls).toEqual(["zh-CN"]);
+  });
+
+  it("does not call changeLanguage when the current language already matches", () => {
+    const changeLanguage = vi.fn<() => Promise<void>>().mockResolvedValue(undefined);
+
+    ensureI18nLanguageForRender("en", {
+      language: "en",
+      changeLanguage,
+    });
+
+    expect(changeLanguage).not.toHaveBeenCalled();
+  });
+});