Localize theme command feedback

src/cli/ui/slash/handlers/theme.ts

@@ -1,4 +1,5 @@
 import { resolveThemePreference, saveTheme } from "@/config.js";
+import { t } from "@/i18n/index.js";
 import { type ThemeName, isThemeName, listThemeNames } from "../../theme/tokens.js";
 import type { SlashHandler } from "../dispatch.js";
 
@@ -13,12 +14,17 @@ const theme: SlashHandler = (args) => {
   if (!next) return { openThemePicker: true };
 
   if (!isThemeChoice(next)) {
-    return { info: `unknown theme: ${next}\navailable: ${themeChoices.join(", ")}` };
+    return {
+      info: t("handlers.theme.unknownTheme", {
+        theme: next,
+        available: themeChoices.join(", "),
+      }),
+    };
   }
 
   saveTheme(next);
   const active = resolveThemePreference(next, process.env.REASONIX_THEME);
-  return { info: `theme saved: ${next}\nactive on next launch: ${active}` };
+  return { info: t("handlers.theme.saved", { theme: next, active }) };
 };
 
 export const handlers: Record<string, SlashHandler> = {

src/i18n/EN.ts

@@ -761,6 +761,10 @@ export const EN: TranslationSchema = {
       titleStarted: "▸ naming session…",
       titleFailed: "▸ session title failed: {reason}",
     },
+    theme: {
+      saved: "theme saved: {theme}\nactive on next launch: {active}",
+      unknownTheme: "unknown theme: {theme}\navailable: {available}",
+    },
     admin: {
       doctorNeedsTui: "/doctor needs a TUI context (postDoctor wired).",
       doctorRunning: "⚕ Doctor — running health checks…",

src/i18n/zh-CN.ts

@@ -731,6 +731,10 @@ export const zhCN: TranslationSchema = {
       titleStarted: "▸ 正在命名会话…",
       titleFailed: "▸ 会话命名失败：{reason}",
     },
+    theme: {
+      saved: "主题已保存：{theme}\n下次启动时生效：{active}",
+      unknownTheme: "未知主题：{theme}\n可用主题：{available}",
+    },
     admin: {
       doctorNeedsTui: "/doctor 需要 TUI 上下文（postDoctor 已连接）。",
       doctorRunning: "⚕ 健康检查 — 正在运行…",

tests/slash.test.ts

@@ -1244,6 +1244,7 @@ describe("handleSlash", () => {
     });
 
     afterEach(() => {
+      setLanguageRuntime("EN");
       process.env.HOME = originalHome;
       process.env.USERPROFILE = originalUserProfile;
       if (originalTheme === undefined) {
@@ -1273,11 +1274,27 @@ describe("handleSlash", () => {
       expect(loadTheme()).toBe("auto");
     });
 
+    it("localizes theme feedback in zh-CN", () => {
+      setLanguageRuntime("zh-CN");
+      const r = handleSlash("theme", ["light"], makeLoop());
+      expect(r.info).toContain("主题已保存：light");
+      expect(r.info).toContain("下次启动时生效：light");
+      expect(loadTheme()).toBe("light");
+    });
+
     it("rejects unknown theme names", () => {
       const r = handleSlash("theme", ["solarized"], makeLoop());
       expect(r.info).toMatch(/unknown theme: solarized/);
       expect(loadTheme()).toBeUndefined();
     });
+
+    it("localizes unknown theme names in zh-CN", () => {
+      setLanguageRuntime("zh-CN");
+      const r = handleSlash("theme", ["solarized"], makeLoop());
+      expect(r.info).toContain("未知主题：solarized");
+      expect(r.info).toContain("可用主题：auto");
+      expect(loadTheme()).toBeUndefined();
+    });
   });
 
   describe("/language", () => {