Multilingual support (with korean)

.changeset/web-app-internationalization.md

@@ -0,0 +1,12 @@
+---
+"@hyperdx/app": minor
+---
+
+feat(i18n): internationalize the web app. All frontend-owned user-facing copy
+now resolves through i18next translation catalogs, and Preferences gains a
+Language selector for English and Korean. English remains the default for new
+and existing users, the locale is never inferred from the browser or OS, and the
+selection is stored only in the existing local preferences record. Korean
+catalogs can be filled in one reviewed key at a time; any key without a Korean
+entry renders the English source copy. Routes, API contracts, user content,
+query syntax, and server error details are unchanged.

knip.json

@@ -4,7 +4,7 @@
     "packages/app": {
       "entry": ["pages/**/*.{ts,tsx}", "scripts/*.js", "tests/e2e/**/*.ts"],
       "project": ["src/**/*.{ts,tsx}", "pages/**/*.{ts,tsx}"],
-      "ignore": [".storybook/public/**"],
+      "ignore": [".storybook/public/**", "src/i18n/__type-tests__/**"],
       "ignoreDependencies": [
         "eslint-config-next",
         "@chromatic-com/storybook",