feat: Implement Two-Factor Authentication (2FA) for enhanced user account security.

src/i18n/en.json

@@ -1,4 +1,4 @@
-{
+{
   "common": {
     "appName": "Redlight",
     "loading": "Loading...",
@@ -99,7 +99,15 @@
     "oauthError": "Authentication failed",
     "oauthNoToken": "No authentication token received.",
     "oauthLoginFailed": "Could not complete sign in. Please try again.",
-    "oauthRedirecting": "Signing you in..."
+    "oauthRedirecting": "Signing you in...",
+    "2fa": {
+      "title": "Two-Factor Authentication",
+      "prompt": "Enter the 6-digit code from your authenticator app.",
+      "codeLabel": "Verification code",
+      "verify": "Verify",
+      "verifyFailed": "Verification failed",
+      "backToLogin": "← Back to login"
+    }
   },
   "home": {
     "madeFor": "Made for BigBlueButton",
@@ -327,6 +335,26 @@
     "passwordChangeFailed": "Error changing password",
     "passwordMismatch": "Passwords do not match",
     "selectLanguage": "Select language",
+    "security": {
+      "title": "Security",
+      "subtitle": "Protect your account with two-factor authentication (2FA). After enabling, you will need both your password and a code from your authenticator app to sign in.",
+      "statusEnabled": "2FA is enabled",
+      "statusEnabledDesc": "Your account is protected with two-factor authentication.",
+      "statusDisabled": "2FA is not enabled",
+      "statusDisabledDesc": "Enable two-factor authentication for an extra layer of security.",
+      "enable": "Enable 2FA",
+      "disable": "Disable 2FA",
+      "enabled": "Two-factor authentication enabled!",
+      "disabled": "Two-factor authentication disabled.",
+      "enableFailed": "Could not enable 2FA",
+      "disableFailed": "Could not disable 2FA",
+      "setupFailed": "Could not start 2FA setup",
+      "scanQR": "Scan this QR code with your authenticator app (Google Authenticator, Authy, etc.).",
+      "manualKey": "Or enter this key manually:",
+      "verifyCode": "Enter the code from your app to verify",
+      "codeLabel": "6-digit code",
+      "disableConfirm": "Enter your password and a current 2FA code to disable two-factor authentication."
+    },
     "caldav": {
       "title": "CalDAV",
       "subtitle": "Connect your calendar app (e.g. Apple Calendar, Thunderbird, DAVx⁵) using the CalDAV protocol. Use your email address and an app token as password.",