refactor(ui): the last shadcn buttons in lib on QueryaButton

lib/core/sdui/sdui_form_builder.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart' as material;
 import 'package:file_selector/file_selector.dart';
 import 'package:querya_desktop/core/sdui/sdui_form_schema.dart';
 import 'package:querya_desktop/shared/widgets/widgets.dart';
+import 'package:querya_desktop/core/ui/querya_control_tokens.dart';
 
 /// Renders a connection / settings form from an SDUI JSON schema (Block A).
 ///
@@ -275,9 +276,10 @@ class SduiFormBuilderState extends material.State<SduiFormBuilder> {
                   ),
                 ),
                 const Gap(8),
-                OutlineButton(
+                QueryaButton.secondary(
+                  label: 'Browse',
                   onPressed: () => _pickFile(field),
-                  child: const Text('Browse'),
+                  size: QueryaControlSize.md,
                 ),
               ],
             ),

lib/core/unsaved_work_guard.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart' as material;
 import 'package:querya_desktop/core/unsaved_work_registry.dart';
 import 'package:querya_desktop/shared/widgets/widgets.dart';
+import 'package:querya_desktop/core/ui/querya_control_tokens.dart';
 
 /// Confirms before Home / Close / tree navigation discards SQL, staged grid
 /// edits, or a dirty document editor. Returns true when it is safe to tear
@@ -40,13 +41,15 @@ Future<bool?> showDiscardUnsavedWorkDialog(material.BuildContext context) {
                   spacing: 8,
                   runSpacing: 8,
                   children: [
-                    OutlineButton(
+                    QueryaButton.ghost(
+                      label: 'Cancel',
                       onPressed: () => material.Navigator.of(ctx).pop(false),
-                      child: const Text('Cancel'),
+                      size: QueryaControlSize.lg,
                     ),
-                    DestructiveButton(
+                    QueryaButton.destructive(
+                      label: 'Discard',
                       onPressed: () => material.Navigator.of(ctx).pop(true),
-                      child: const Text('Discard'),
+                      size: QueryaControlSize.lg,
                     ),
                   ],
                 ),

lib/features/connections/driver_manager_dialog.dart

@@ -6,6 +6,7 @@ import 'package:querya_desktop/features/connections/connection_type_choice.dart'
 import 'package:querya_desktop/features/connections/driver_icon.dart';
 import 'package:querya_desktop/features/connections/new_connection_dialog.dart';
 import 'package:querya_desktop/shared/widgets/widgets.dart';
+import 'package:querya_desktop/core/ui/querya_control_tokens.dart';
 
 /// One row in the driver list.
 typedef _DriverInfo = ({
@@ -138,9 +139,10 @@ class _DriverManagerDialogContent extends material.StatelessWidget {
             child: material.Row(
               mainAxisAlignment: material.MainAxisAlignment.end,
               children: [
-                PrimaryButton(
+                QueryaButton.primary(
+                  label: 'Close',
                   onPressed: () => material.Navigator.of(context).pop(),
-                  child: const Text('Close'),
+                  size: QueryaControlSize.lg,
                 ),
               ],
             ),

lib/features/connections/new_connection_dialog.dart

@@ -8,6 +8,7 @@ import 'package:querya_desktop/core/layout/window_layout.dart';
 import 'package:querya_desktop/core/motion/querya_hover_surface.dart';
 import 'package:querya_desktop/features/connections/driver_icon.dart';
 import 'package:querya_desktop/shared/widgets/widgets.dart';
+import 'package:querya_desktop/core/ui/querya_control_tokens.dart';
 
 export 'package:querya_desktop/core/database/connection_type.dart';
 export 'package:querya_desktop/core/database/connection_type_choice.dart';
@@ -237,16 +238,18 @@ class _NewConnectionDialogContentState
                     child: material.Row(
                       mainAxisAlignment: material.MainAxisAlignment.end,
                       children: [
-                        GhostButton(
+                        QueryaButton.ghost(
+                          label: 'Cancel',
                           onPressed: () => material.Navigator.of(context).pop(),
-                          child: const Text('Cancel'),
+                          size: QueryaControlSize.lg,
                         ),
                         const material.SizedBox(width: 12),
-                        PrimaryButton(
+                        QueryaButton.primary(
+                          label: 'Next',
                           onPressed: _selected == null
                               ? null
                               : () => material.Navigator.of(context).pop(_selected),
-                          child: const Text('Next'),
+                          size: QueryaControlSize.lg,
                         ),
                       ],
                     ),

lib/features/connections/new_connection_url_dialog.dart

@@ -3,6 +3,7 @@ import 'package:querya_desktop/core/layout/window_layout.dart';
 import 'package:querya_desktop/core/storage/local_db.dart';
 import 'package:querya_desktop/features/connections/connection_url_parser.dart';
 import 'package:querya_desktop/shared/widgets/widgets.dart';
+import 'package:querya_desktop/core/ui/querya_control_tokens.dart';
 
 /// Shows a dialog to create a new database connection from a URI.
 /// Returns the ConnectionRow or null if cancelled.
@@ -208,14 +209,16 @@ class _NewConnectionUrlDialogContentState
                 child: material.Row(
                   mainAxisAlignment: material.MainAxisAlignment.end,
                   children: [
-                    GhostButton(
+                    QueryaButton.ghost(
+                      label: 'Cancel',
                       onPressed: () => material.Navigator.of(context).pop(),
-                      child: const Text('Cancel'),
+                      size: QueryaControlSize.lg,
                     ),
                     const material.SizedBox(width: 12),
-                    PrimaryButton(
+                    QueryaButton.primary(
+                      label: 'Create',
                       onPressed: _validateAndSubmit,
-                      child: const Text('Create'),
+                      size: QueryaControlSize.lg,
                     ),
                   ],
                 ),

lib/features/connections/new_folder_dialog.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart' as material;
 import 'package:querya_desktop/core/layout/window_layout.dart';
 import 'package:querya_desktop/shared/widgets/widgets.dart';
+import 'package:querya_desktop/core/ui/querya_control_tokens.dart';
 
 /// Shows a dialog to create a new folder (same style as new connection).
 /// Returns the folder name or null if cancelled.
@@ -100,18 +101,20 @@ class _NewFolderDialogContentState
             child: material.Row(
               mainAxisAlignment: material.MainAxisAlignment.end,
               children: [
-                GhostButton(
+                QueryaButton.ghost(
+                  label: 'Cancel',
                   onPressed: () => material.Navigator.of(context).pop(),
-                  child: const Text('Cancel'),
+                  size: QueryaControlSize.lg,
                 ),
                 const material.SizedBox(width: 12),
                 ListenableBuilder(
                   listenable: _nameController,
-                  builder: (context, __) => PrimaryButton(
+                  builder: (context, __) => QueryaButton.primary(
+                    label: 'Create',
                     onPressed: _name.isEmpty
                         ? null
                         : () => material.Navigator.of(context).pop(_name),
-                    child: const Text('Create'),
+                    size: QueryaControlSize.lg,
                   ),
                 ),
               ],

lib/features/connections/ssh_tunnel_section.dart

@@ -346,18 +346,14 @@ class _SshTunnelSectionState extends material.State<SshTunnelSection> {
                     placeholder: const Text('••••••••'),
                     features: [
                       InputFeature.trailing(
-                        IconButton.ghost(
-                          size: ButtonSize.small,
-                          icon: material.Icon(
-                            _obscurePassword
-                                ? material.Icons.visibility_off_outlined
-                                : material.Icons.visibility_outlined,
-                            size: 16,
-                          ),
+                        QueryaButton.icon(
+                          icon: _obscurePassword
+                              ? material.Icons.visibility_off_outlined
+                              : material.Icons.visibility_outlined,
+                          tooltip: _obscurePassword ? 'Show password' : 'Hide password',
+                          size: QueryaControlSize.sm,
                           onPressed: () {
-                            setState(
-                              () => _obscurePassword = !_obscurePassword,
-                            );
+                            setState(() => _obscurePassword = !_obscurePassword);
                           },
                         ),
                       ),
@@ -404,18 +400,14 @@ class _SshTunnelSectionState extends material.State<SshTunnelSection> {
                     placeholder: const Text('Passphrase if key is encrypted'),
                     features: [
                       InputFeature.trailing(
-                        IconButton.ghost(
-                          size: ButtonSize.small,
-                          icon: material.Icon(
-                            _obscurePassphrase
-                                ? material.Icons.visibility_off_outlined
-                                : material.Icons.visibility_outlined,
-                            size: 16,
-                          ),
+                        QueryaButton.icon(
+                          icon: _obscurePassphrase
+                              ? material.Icons.visibility_off_outlined
+                              : material.Icons.visibility_outlined,
+                          tooltip: _obscurePassphrase ? 'Show passphrase' : 'Hide passphrase',
+                          size: QueryaControlSize.sm,
                           onPressed: () {
-                            setState(
-                              () => _obscurePassphrase = !_obscurePassphrase,
-                            );
+                            setState(() => _obscurePassphrase = !_obscurePassphrase);
                           },
                         ),
                       ),

lib/features/erd/erd_group_dialog.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart' as material;
 import 'package:querya_desktop/core/layout/window_layout.dart';
 import 'package:querya_desktop/shared/widgets/widgets.dart';
+import 'package:querya_desktop/core/ui/querya_control_tokens.dart';
 
 /// Name and note of a diagram group (#1282), as the user typed them.
 typedef ErdGroupText = ({String name, String? note});
@@ -116,17 +117,19 @@ class _ErdGroupDialogState extends material.State<_ErdGroupDialog> {
             child: material.Row(
               mainAxisAlignment: material.MainAxisAlignment.end,
               children: [
-                GhostButton(
+                QueryaButton.ghost(
+                  label: 'Cancel',
                   onPressed: () => material.Navigator.of(context).pop(),
-                  child: const Text('Cancel'),
+                  size: QueryaControlSize.lg,
                 ),
                 const material.SizedBox(width: 12),
                 ListenableBuilder(
                   listenable: _name,
-                  builder: (context, _) => PrimaryButton(
+                  builder: (context, _) => QueryaButton.primary(
                     key: const material.ValueKey('erd_group_submit'),
+                    label: widget.action,
                     onPressed: _name.text.trim().isEmpty ? null : _submit,
-                    child: Text(widget.action),
+                    size: QueryaControlSize.lg,
                   ),
                 ),
               ],

lib/features/erd/erd_note_dialog.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart' as material;
 import 'package:querya_desktop/core/layout/window_layout.dart';
 import 'package:querya_desktop/shared/widgets/widgets.dart';
+import 'package:querya_desktop/core/ui/querya_control_tokens.dart';
 
 /// Asks for the text of a sticky note (#1283); null when cancelled.
 Future<String?> showErdNoteDialog(
@@ -92,20 +93,22 @@ class _ErdNoteDialogState extends material.State<_ErdNoteDialog> {
             child: material.Row(
               mainAxisAlignment: material.MainAxisAlignment.end,
               children: [
-                GhostButton(
+                QueryaButton.ghost(
+                  label: 'Cancel',
                   onPressed: () => material.Navigator.of(context).pop(),
-                  child: const Text('Cancel'),
+                  size: QueryaControlSize.lg,
                 ),
                 const material.SizedBox(width: 12),
                 ListenableBuilder(
                   listenable: _text,
-                  builder: (context, _) => PrimaryButton(
+                  builder: (context, _) => QueryaButton.primary(
                     key: const material.ValueKey('erd_note_submit'),
+                    label: widget.action,
                     onPressed: _text.text.trim().isEmpty
                         ? null
                         : () => material.Navigator.of(context)
                             .pop(_text.text.trim()),
-                    child: Text(widget.action),
+                    size: QueryaControlSize.lg,
                   ),
                 ),
               ],

lib/features/erd/erd_view_name_dialog.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart' as material;
 import 'package:querya_desktop/core/layout/window_layout.dart';
 import 'package:querya_desktop/shared/widgets/widgets.dart';
+import 'package:querya_desktop/core/ui/querya_control_tokens.dart';
 
 /// Asks for the name of a saved diagram view (#1284); null when cancelled.
 Future<String?> showErdViewNameDialog(
@@ -98,17 +99,19 @@ class _ErdViewNameDialogState extends material.State<_ErdViewNameDialog> {
             child: material.Row(
               mainAxisAlignment: material.MainAxisAlignment.end,
               children: [
-                GhostButton(
+                QueryaButton.ghost(
+                  label: 'Cancel',
                   onPressed: () => material.Navigator.of(context).pop(),
-                  child: const Text('Cancel'),
+                  size: QueryaControlSize.lg,
                 ),
                 const material.SizedBox(width: 12),
                 ListenableBuilder(
                   listenable: _name,
-                  builder: (context, _) => PrimaryButton(
+                  builder: (context, _) => QueryaButton.primary(
                     key: const material.ValueKey('erd_view_submit'),
+                    label: widget.action,
                     onPressed: _name.text.trim().isEmpty ? null : _submit,
-                    child: Text(widget.action),
+                    size: QueryaControlSize.lg,
                   ),
                 ),
               ],

lib/features/extensions/extension_connection_picker_dialog.dart

@@ -4,6 +4,7 @@ import 'package:querya_desktop/core/storage/local_db.dart';
 import 'package:querya_desktop/core/ui/querya_icons.dart';
 import 'package:querya_desktop/features/connections/driver_icon.dart';
 import 'package:querya_desktop/shared/widgets/widgets.dart';
+import 'package:querya_desktop/core/ui/querya_control_tokens.dart';
 
 /// Prompts the user to pick which of several equally-live connections an
 /// ambiguous extension command should target (#892), instead of silently
@@ -101,9 +102,10 @@ class _ExtensionConnectionPickerDialog extends material.StatelessWidget {
             const Gap(12),
             material.Align(
               alignment: material.Alignment.centerRight,
-              child: OutlineButton(
+              child: QueryaButton.ghost(
+                label: 'Cancel',
                 onPressed: () => material.Navigator.of(context).pop(),
-                child: const Text('Cancel'),
+                size: QueryaControlSize.lg,
               ),
             ),
           ],