Apply i18n to all UI components with ko/ja translations

- Add src/i18n/i18n.ts translation engine (ported from SimpleDeckyTDP)
- Add defaults/i18n/{ko,ja,template}.json with 80 translation keys
- Add defaults/i18n/language_metadata.json and steam_language_map.json
- Add scripts/build_i18n_json.sh to generate languages.json
- Apply t() to all 10 components: Content, ConfigurationSection,
  FlatpaksModal, FpsMultiplierControl, InstallationButton, NerdStuffModal,
  ProfileManagement, SmartClipboardButton, FgmodClipboardButton, UsageInstructions

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/src/components/SmartClipboardButton.tsx b/src/components/SmartClipboardButton.tsx
index c90515a..8da239a 100644
--- a/src/components/SmartClipboardButton.tsx
+++ b/src/components/SmartClipboardButton.tsx
@@ -4,6 +4,7 @@ import { FaClipboard, FaCheck } from "react-icons/fa";
 import { getLaunchOption } from "../api/lsfgApi";
 import { showClipboardErrorToast } from "../utils/toastUtils";
 import { copyWithVerification } from "../utils/clipboardUtils";
+import t from '../i18n/i18n';
 
 export function SmartClipboardButton() {
   const [isLoading, setIsLoading] = useState(false);
@@ -74,7 +75,7 @@ export function SmartClipboardButton() {
             color: showSuccess ? "#4CAF50" : "inherit",
             fontWeight: showSuccess ? "bold" : "normal"
           }}>
-            {showSuccess ? "Copied to clipboard" : isLoading ? "Copying..." : "Copy Launch Option"}
+            {showSuccess ? t('CLIPBOARD_COPIED', 'Copied to clipboard') : isLoading ? t('CLIPBOARD_COPYING', 'Copying...') : t('CLIPBOARD_COPY_LAUNCH', 'Copy Launch Option')}
           </div>
         </div>
       </ButtonItem>