fix(i18n): drop repeated zh catalog keys and test that every key appears once (#2752)

Merges had added eleven zh.json keys a second time (Docker, Shell, the language
names, Add Service ({kind}), Others, Servers). JSON.parse silently keeps the last
copy, so nothing failed. The catalogs test now reads each catalog file and fails
on a key listed twice.

src/platform/i18n.test.ts

@@ -296,6 +296,20 @@ describe("catalogs", () => {
     expect(Object.keys(texts).sort()).toEqual([...SUPPORTED_LOCALES].sort());
   });
 
+  it("list every key once", () => {
+    // JSON.parse keeps the last of two equal keys, so a merge that adds a key twice goes unnoticed.
+    for (const dir of [LOCALES_DIR, join(LOCALES_DIR, "text")]) {
+      for (const file of readdirSync(dir).filter((f) => f.endsWith(".json"))) {
+        const keys = [...readFileSync(join(dir, file), "utf8").matchAll(/^ {2}("(?:[^"\\]|\\.)*"):/gm)].map(
+          (m) => JSON.parse(m[1]!) as string,
+        );
+        const seen = new Set<string>();
+        const repeated = keys.filter((key) => seen.has(key) || !seen.add(key));
+        expect(repeated, `${file} in ${dir}`).toEqual([]);
+      }
+    }
+  });
+
   it("translate source text into non-empty text", () => {
     for (const [locale, catalog] of Object.entries(texts))
       for (const [source, text] of Object.entries(catalog)) expect(text.trim(), `${locale}:${source}`).not.toBe("");

src/platform/locales/text/zh.json

@@ -7120,17 +7120,6 @@
   "No build": "不构建",
   "Build, no error check": "构建，不检查错误",
   "Before launch build for this Java configuration": "此 Java 配置启动前的构建方式",
-  "Docker": "Docker",
-  "Shell": "Shell",
-  "C/C++": "C/C++",
-  "Go": "Go",
-  "Rust": "Rust",
-  "Python": "Python",
-  "JavaScript": "JavaScript",
-  "Java": "Java",
-  "Add Service ({kind})": "添加服务（{kind}）",
-  "Others": "其他",
-  "Servers": "服务器",
   "Open main menu with a lone Alt press": "单独按下 Alt 打开主菜单",
   "When off, Alt key combinations still work but pressing Alt alone does not focus the main menu": "关闭后，Alt 组合键仍然可用，但单独按下 Alt 不会聚焦主菜单",
   "the bundle of {gemfile} has no `debug` gem. Add `gem \"debug\"` to the Gemfile and run `bundle install`": "{gemfile} 的 bundle 中没有 `debug` gem。请在 Gemfile 中添加 `gem \"debug\"`，然后运行 `bundle install`",