Fix translation completeness issues (#8472)

Co-authored-by: openhands <openhands@all-hands.dev>

frontend/scripts/check-translation-completeness.cjs

@@ -0,0 +1,88 @@
+#!/usr/bin/env node
+
+/**
+ * Pre-commit hook script to check for translation completeness
+ * This script ensures that all translation keys have entries for all supported languages
+ */
+
+const fs = require('fs');
+const path = require('path');
+
+// Load the translation file
+const translationJsonPath = path.join(__dirname, '../src/i18n/translation.json');
+const translationJson = require(translationJsonPath);
+
+// Load the available languages from the i18n index file
+const i18nIndexPath = path.join(__dirname, '../src/i18n/index.ts');
+const i18nIndexContent = fs.readFileSync(i18nIndexPath, 'utf8');
+
+// Extract the language codes from the AvailableLanguages array
+const languageCodesRegex = /\{ label: "[^"]+", value: "([^"]+)" \}/g;
+const supportedLanguageCodes = [];
+let match;
+
+while ((match = languageCodesRegex.exec(i18nIndexContent)) !== null) {
+  supportedLanguageCodes.push(match[1]);
+}
+
+// Track missing and extra translations
+const missingTranslations = {};
+const extraLanguages = {};
+let hasErrors = false;
+
+// Check each translation key
+Object.entries(translationJson).forEach(([key, translations]) => {
+  // Get the languages available for this key
+  const availableLanguages = Object.keys(translations);
+
+  // Find missing languages for this key
+  const missing = supportedLanguageCodes.filter(
+    (langCode) => !availableLanguages.includes(langCode)
+  );
+
+  if (missing.length > 0) {
+    missingTranslations[key] = missing;
+    hasErrors = true;
+  }
+
+  // Find extra languages for this key
+  const extra = availableLanguages.filter(
+    (langCode) => !supportedLanguageCodes.includes(langCode)
+  );
+
+  if (extra.length > 0) {
+    extraLanguages[key] = extra;
+    hasErrors = true;
+  }
+});
+
+// Generate detailed error message if there are missing translations
+if (Object.keys(missingTranslations).length > 0) {
+  console.error('\x1b[31m%s\x1b[0m', 'ERROR: Missing translations detected');
+  console.error(`Found ${Object.keys(missingTranslations).length} translation keys with missing languages:`);
+  
+  Object.entries(missingTranslations).forEach(([key, langs]) => {
+    console.error(`- Key "${key}" is missing translations for: ${langs.join(', ')}`);
+  });
+  
+  console.error('\nPlease add the missing translations before committing.');
+}
+
+// Generate detailed error message if there are extra languages
+if (Object.keys(extraLanguages).length > 0) {
+  console.error('\x1b[31m%s\x1b[0m', 'ERROR: Extra languages detected');
+  console.error(`Found ${Object.keys(extraLanguages).length} translation keys with extra languages not in AvailableLanguages:`);
+  
+  Object.entries(extraLanguages).forEach(([key, langs]) => {
+    console.error(`- Key "${key}" has translations for unsupported languages: ${langs.join(', ')}`);
+  });
+  
+  console.error('\nPlease remove the extra languages before committing.');
+}
+
+// Exit with error code if there are issues
+if (hasErrors) {
+  process.exit(1);
+} else {
+  console.log('\x1b[32m%s\x1b[0m', 'All translation keys have complete language coverage!');
+}