[auth] fix content not show when font size set to large from device settings

auth/lib/ente_theme_data.dart

@@ -496,7 +496,7 @@ ElevatedButtonThemeData buildElevatedButtonThemeData({
         fontFamily: 'Inter-SemiBold',
         fontSize: 18,
       ),
-      padding: const EdgeInsets.symmetric(vertical: 18),
+      padding: const EdgeInsets.symmetric(vertical: 8),
       shape: const RoundedRectangleBorder(
         borderRadius: BorderRadius.all(Radius.circular(4)),
       ),

auth/lib/onboarding/view/onboarding_page.dart

@@ -90,8 +90,10 @@ class _OnboardingPageState extends State<OnboardingPage> {
           child: SingleChildScrollView(
             child: Center(
               child: ConstrainedBox(
-                constraints:
+                constraints: BoxConstraints(
-                    const BoxConstraints.tightFor(height: 800, width: 450),
+                  minHeight: MediaQuery.of(context).size.height,
+                  maxWidth: 450,
+                ),
                 child: Padding(
                   padding: const EdgeInsets.symmetric(
                     vertical: 40.0,
@@ -197,6 +199,7 @@ class _OnboardingPageState extends State<OnboardingPage> {
                           child: Center(
                             child: Text(
                               l10n.useOffline,
+                              textAlign: TextAlign.center,
                               style: body.copyWith(
                                 color: Theme.of(context)
                                     .colorScheme

auth/lib/onboarding/view/setup_enter_secret_key_page.dart

@@ -318,6 +318,9 @@ class _SetupEnterSecretKeyPageState extends State<SetupEnterSecretKeyPage> {
                   SizedBox(
                     width: 400,
                     child: OutlinedButton(
+                      style: OutlinedButton.styleFrom(
+                        padding: const EdgeInsets.symmetric(vertical: 8),
+                      ),
                       onPressed: () async {
                         if ((_accountController.text.trim().isEmpty &&
                                 _issuerController.text.trim().isEmpty) ||

auth/lib/ui/home/home_empty_state.dart

@@ -25,7 +25,10 @@ class HomeEmptyStateWidget extends StatelessWidget {
     return SingleChildScrollView(
       child: Center(
         child: ConstrainedBox(
-          constraints: const BoxConstraints.tightFor(height: 800, width: 450),
+          constraints: BoxConstraints(
+            minHeight: MediaQuery.of(context).size.height,
+            minWidth: 450,
+          ),
           child: Padding(
             padding: const EdgeInsets.symmetric(vertical: 40.0, horizontal: 40),
             child: Column(
@@ -49,7 +52,13 @@ class HomeEmptyStateWidget extends StatelessWidget {
                         width: 400,
                         child: OutlinedButton(
                           onPressed: onScanTap,
-                          child: Text(l10n.importScanQrCode),
+                          style: OutlinedButton.styleFrom(
+                            padding: const EdgeInsets.symmetric(vertical: 8),
+                          ),
+                          child: Text(
+                            l10n.importScanQrCode,
+                            textAlign: TextAlign.center,
+                          ),
                         ),
                       ),
                     const SizedBox(height: 18),
@@ -60,7 +69,13 @@ class HomeEmptyStateWidget extends StatelessWidget {
                         width: 400,
                         child: OutlinedButton(
                           onPressed: onImportFromGallery,
-                          child: const Text("Import from gallery"),
+                          style: OutlinedButton.styleFrom(
+                            padding: const EdgeInsets.symmetric(vertical: 8),
+                          ),
+                          child: const Text(
+                            "Import from gallery",
+                            textAlign: TextAlign.center,
+                          ),
                         ),
                       ),
                     const SizedBox(height: 18),
@@ -68,7 +83,13 @@ class HomeEmptyStateWidget extends StatelessWidget {
                       width: 400,
                       child: OutlinedButton(
                         onPressed: onManuallySetupTap,
-                        child: Text(l10n.importEnterSetupKey),
+                        style: OutlinedButton.styleFrom(
+                          padding: const EdgeInsets.symmetric(vertical: 8),
+                        ),
+                        child: Text(
+                          l10n.importEnterSetupKey,
+                          textAlign: TextAlign.center,
+                        ),
                       ),
                     ),
                     const SizedBox(height: 54),