DUNGEONS-34: implement Webka local streaming app

Co-authored-by: multica-agent <github@multica.ai>

frontend/scripts/check-locales.mjs

@@ -0,0 +1,37 @@
+import { readFileSync, readdirSync } from "node:fs";
+import { fileURLToPath } from "node:url";
+import { join } from "node:path";
+const root = fileURLToPath(new URL("../", import.meta.url));
+const flatten = (value, prefix = "") =>
+  Object.entries(value).flatMap(([key, v]) =>
+    typeof v === "object"
+      ? flatten(v, `${prefix}${key}.`)
+      : [`${prefix}${key}`],
+  );
+const locales = ["en", "ru", "es"].map((code) =>
+  JSON.parse(readFileSync(join(root, `i18n/locales/${code}.json`), "utf8")),
+);
+const expected = flatten(locales[0]).sort();
+for (let i = 1; i < locales.length; i++)
+  if (JSON.stringify(flatten(locales[i]).sort()) !== JSON.stringify(expected))
+    throw Error("Locale key mismatch");
+const files = (path) =>
+  readdirSync(path, { withFileTypes: true }).flatMap((entry) =>
+    entry.isDirectory()
+      ? files(join(path, entry.name))
+      : [join(path, entry.name)],
+  );
+for (const file of [
+  ...files(join(root, "pages")),
+  ...files(join(root, "components")),
+  join(root, "app.vue"),
+]) {
+  for (const match of readFileSync(file, "utf8").matchAll(
+    /\b(?:\$t|t)\(['"]([\w.]+)['"]/g,
+  ))
+    if (!expected.includes(match[1]))
+      throw Error(`${file}: Missing ${match[1]}`);
+}
+console.log(
+  `${expected.length} keys match in en/ru/es; static template keys verified.`,
+);