fix(i18n): add 4 missing EN source keys + i18n-gate CI (#12272)

scripts/i18n-gate.mjs

@@ -0,0 +1,66 @@
+#!/usr/bin/env node
+// scripts/i18n-gate.mjs — Fail CI if any i18n locale still contains __MISSING__ markers.
+// Usage: node scripts/i18n-gate.mjs src/i18n/messages/ [--strict]
+// --strict also fails if any locale is missing keys present in en.json.
+import fs from "node:fs";
+import path from "node:path";
+
+const dir = process.argv[2] || "src/i18n/messages";
+const strict = process.argv.includes("--strict");
+
+function getAllKeys(obj, prefix = "") {
+  const out = {};
+  for (const [k, v] of Object.entries(obj)) {
+    const p = prefix ? `${prefix}.${k}` : k;
+    if (v && typeof v === "object" && !Array.isArray(v)) Object.assign(out, getAllKeys(v, p));
+    else out[p] = v;
+  }
+  return out;
+}
+
+const files = fs.readdirSync(dir).filter((f) => f.endsWith(".json"));
+let bad = 0;
+let report = [];
+
+// 1. Detect __MISSING__: markers
+for (const f of files) {
+  const json = JSON.parse(fs.readFileSync(path.join(dir, f), "utf8"));
+  const flat = getAllKeys(json);
+  const missing = Object.entries(flat)
+    .filter(([, v]) => typeof v === "string" && v.startsWith("__MISSING__:"))
+    .map(([k]) => k);
+  if (missing.length) {
+    bad += missing.length;
+    report.push(
+      `${f}: ${missing.length} __MISSING__: markers (e.g. ${missing.slice(0, 3).join(", ")})`
+    );
+  }
+}
+
+// 2. (--strict) Detect keys in en.json missing from other locales
+if (strict && files.includes("en.json")) {
+  const en = getAllKeys(JSON.parse(fs.readFileSync(path.join(dir, "en.json"), "utf8")));
+  const enKeys = new Set(Object.keys(en));
+  for (const f of files) {
+    if (f === "en.json") continue;
+    const json = JSON.parse(fs.readFileSync(path.join(dir, f), "utf8"));
+    const flat = getAllKeys(json);
+    const missingKeys = Object.keys(flat).filter((k) => !enKeys.has(k));
+    if (missingKeys.length) {
+      bad += missingKeys.length;
+      report.push(
+        `${f}: ${missingKeys.length} keys not in en.json (e.g. ${missingKeys.slice(0, 3).join(", ")})`
+      );
+    }
+  }
+}
+
+if (bad) {
+  console.error(`i18n-gate FAIL: ${bad} issue(s) across ${files.length} locales`);
+  report.forEach((r) => console.error("  " + r));
+  process.exit(1);
+} else {
+  console.log(
+    `i18n-gate OK: ${files.length} locales, no __MISSING__: markers${strict ? " (strict mode)" : ""}`
+  );
+}