authentication and calendar-sync passwords keyed (214 -> 163)

Authentication reaches zero -- sign-in, bootstrap, forgot and reset password. These
are the first words a new account reads, which is why the brief ranked them above
the larger screens.

DavAppPasswords had the third toLocaleDateString(undefined, ...) in the shell; it now
uses useFormat().date like the other two.

DebugPanel's three labels are keyed too. Worth knowing rather than acting on: that
panel is rendered behind showDebug, which Background.tsx hardcodes to false, so it
never appears. Keyed rather than deleted because removing it is not my call.

src/apps/officer-web/Screens/Authentication/LandingPage/Login.tsx

@@ -8,12 +8,14 @@ import { toast } from 'sonner';
 import { useForm } from 'hooks/useForm';
 import { useAuth } from 'hooks/useAuth';
 import { useGlobal } from 'hooks/useGlobal';
+import { useTranslation } from '@/lib/i18n';
 
 const initialState: LoginFormState = {
   // email: 'pastilhas@pastilhas.dev',
   // password: '',
 };
 export function Login() {
+  const { t } = useTranslation();
   const [isSubmitting, setIsSubmitting] = useState(false);
   const { state, formRef, update, isValid } = useForm<LoginFormState>(initialState, validateForm);
   const { signin } = useAuth();
@@ -40,20 +42,20 @@ export function Login() {
   return (
     <Card className="md:py-6 md:px-24 md:min-w-[480px] flex flex-col gap-6">
       <div className="text-center">
-        <div className="text-duck-dark text-2xl font-bold">Welcome Back</div>
-        <div className="text-duck-dark/60">Sign in to your account</div>
+        <div className="text-duck-dark text-2xl font-bold">{t('auth.signInTitle')}</div>
+        <div className="text-duck-dark/60">{t('auth.signInSubtitle')}</div>
       </div>
 
       <form ref={formRef} onSubmit={handleSubmit} className="grid gap-4">
         <Label className="grid gap-2">
-          <span className="text-duck-dark/70">Email or username</span>
+          <span className="text-duck-dark/70">{t('auth.emailOrUsername')}</span>
           <Input
             className="h-11 bg-background/60 border-duck-dark/20 text-duck-dark placeholder:text-duck-dark/40"
             // `text`, not `email`: the browser refuses to submit a username under type="email", so the
             // field would have validated the user out of an account they have.
             type="text"
             name="email"
-            placeholder="you@example.com"
+            placeholder={t('auth.emailPlaceholder')}
             // `username` rather than `email`, which is what password managers expect for a field that
             // takes either — and it is the value they already store beside the password.
             autoComplete="username"
@@ -61,12 +63,12 @@ export function Login() {
         </Label>
 
         <Label className="grid gap-2">
-          <span className="text-duck-dark/70">Password</span>
+          <span className="text-duck-dark/70">{t('auth.password')}</span>
           <Input
             className="h-11 bg-background/60 border-duck-dark/20 text-duck-dark placeholder:text-duck-dark/40"
             type="password"
             name="password"
-            placeholder="Your password"
+            placeholder={t('auth.passwordPlaceholder')}
             autoComplete="current-password"
           />
         </Label>
@@ -90,7 +92,7 @@ export function Login() {
           {/* </p> */}
           <p>
             <Link to="/auth/forgot-password" className="text-duck-forest underline hover:text-duck-forest/80">
-              Forgot password?
+              {t('auth.forgotPassword')}
             </Link>
           </p>
         </div>