feat(menu): implement File -> New, Open..., Save actions

lib/core/actions/sql_editor_actions.dart

@@ -0,0 +1,13 @@
+import 'package:flutter/widgets.dart';
+
+class NewSqlIntent extends Intent {
+  const NewSqlIntent();
+}
+
+class OpenSqlIntent extends Intent {
+  const OpenSqlIntent();
+}
+
+class SaveSqlIntent extends Intent {
+  const SaveSqlIntent();
+}

lib/features/main_screen/querya_window_title_bar.dart

@@ -4,6 +4,7 @@ import 'package:flutter/material.dart' as material
 import 'package:querya_desktop/core/theme/querya_theme_scope.dart';
 import 'package:querya_desktop/features/connections/driver_manager_dialog.dart';
 import 'package:querya_desktop/features/settings/preferences_dialog.dart';
+import 'package:querya_desktop/core/actions/sql_editor_actions.dart';
 import 'package:shadcn_flutter/shadcn_flutter.dart';
 
 /// Custom bitsdojo title bar styled from [QueryaThemeScope] workbench tokens.
@@ -76,12 +77,29 @@ class QueryaWindowTitleBar extends StatelessWidget {
                         MenuButton(
                           subMenu: [
                             MenuButton(
-                                onPressed: (_) {}, child: const Text('New')),
-                            MenuButton(
-                                onPressed: (_) {},
+                                onPressed: (ctx) {
+                                  Actions.maybeInvoke(
+                                    FocusManager.instance.primaryFocus?.context ?? ctx,
+                                    const NewSqlIntent(),
+                                  );
+                                },
+                                child: const Text('New')),
+                            MenuButton(
+                                onPressed: (ctx) {
+                                  Actions.maybeInvoke(
+                                    FocusManager.instance.primaryFocus?.context ?? ctx,
+                                    const OpenSqlIntent(),
+                                  );
+                                },
                                 child: const Text('Open...')),
                             MenuButton(
-                                onPressed: (_) {}, child: const Text('Save')),
+                                onPressed: (ctx) {
+                                  Actions.maybeInvoke(
+                                    FocusManager.instance.primaryFocus?.context ?? ctx,
+                                    const SaveSqlIntent(),
+                                  );
+                                },
+                                child: const Text('Save')),
                             const MenuDivider(),
                             MenuButton(
                                 onPressed: (_) => appWindow.close(),

lib/features/mysql/mysql_sql_workspace.dart

@@ -1,8 +1,11 @@
 import 'dart:async';
+import 'dart:io';
 
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart' as material;
 import 'package:flutter/services.dart' show LogicalKeyboardKey;
+import 'package:file_selector/file_selector.dart';
+import 'package:querya_desktop/core/actions/sql_editor_actions.dart';
 import 'package:querya_desktop/core/database/mysql_service.dart';
 import 'package:querya_desktop/core/layout/vertical_split_pane.dart';
 import 'package:querya_desktop/core/storage/app_settings.dart';
@@ -237,78 +240,135 @@ class _MysqlSqlWorkspaceState extends material.State<MysqlSqlWorkspace> {
     return v.toInt();
   }
 
+  Future<void> _openSqlFile() async {
+    try {
+      final file = await openFile(
+        acceptedTypeGroups: const [
+          XTypeGroup(
+            label: 'SQL query',
+            extensions: ['sql'],
+          ),
+        ],
+      );
+      if (file == null) return;
+      final text = await file.readAsString();
+      if (!mounted) return;
+      _sqlController.value = material.TextEditingValue(
+        text: text,
+        selection: material.TextSelection.collapsed(offset: text.length),
+      );
+    } catch (_) {}
+  }
+
+  Future<void> _saveSqlFile() async {
+    try {
+      final name = 'query_${DateTime.now().toIso8601String().replaceAll(':', '-')}.sql';
+      final location = await getSaveLocation(
+        acceptedTypeGroups: const [
+          XTypeGroup(label: 'SQL', extensions: ['sql']),
+        ],
+        suggestedName: name,
+      );
+      final path = location?.path;
+      if (path == null || path.isEmpty) return;
+      await File(path).writeAsString(_sqlController.text);
+    } catch (_) {}
+  }
+
   @override
   material.Widget build(material.BuildContext context) {
     final theme = Theme.of(context);
 
-    return material.CallbackShortcuts(
-      bindings: {
-        const material.SingleActivator(LogicalKeyboardKey.f5): () {
-          if (!_running) {
-            unawaited(_execute());
-          }
-        },
+    return Actions(
+      actions: <Type, Action<Intent>>{
+        NewSqlIntent: CallbackAction<NewSqlIntent>(
+          onInvoke: (intent) {
+            _sqlController.clear();
+            return null;
+          },
+        ),
+        OpenSqlIntent: CallbackAction<OpenSqlIntent>(
+          onInvoke: (intent) {
+            unawaited(_openSqlFile());
+            return null;
+          },
+        ),
+        SaveSqlIntent: CallbackAction<SaveSqlIntent>(
+          onInvoke: (intent) {
+            unawaited(_saveSqlFile());
+            return null;
+          },
+        ),
       },
-      child: material.Focus(
-        autofocus: true,
-        child: VerticalSplitPane(
-          fraction: _topFraction,
-          maxFraction: 0.85,
-          top: Column(
-            crossAxisAlignment: CrossAxisAlignment.stretch,
-            children: [
-              _MysqlSqlToolbar(
-                onExecute: _running ? null : _execute,
-                running: _running,
-                queryTimeoutSeconds: _queryTimeoutSeconds,
-                onQueryTimeoutChanged: _onStmtTimeoutChanged,
-                onOpenPreferences: () => showPreferencesDialog(context),
-                onOpenHistory: widget.connectionRow.id != null && !_running
-                    ? () {
-                        showSqlQueryHistoryDialog(
-                          context: context,
-                          connectionId: widget.connectionRow.id!,
-                          databaseName: widget.connectionRow.databaseName,
-                          sqlController: _sqlController,
-                        );
-                      }
-                    : null,
-              ),
-              const Divider(height: 1),
-              Expanded(
-                child: QueryEditorTab(
-                  controller: _sqlController,
-                  fontSize: _editorFontSize,
+      child: material.CallbackShortcuts(
+        bindings: {
+          const material.SingleActivator(LogicalKeyboardKey.f5): () {
+            if (!_running) {
+              unawaited(_execute());
+            }
+          },
+        },
+        child: material.Focus(
+          autofocus: true,
+          child: VerticalSplitPane(
+            fraction: _topFraction,
+            maxFraction: 0.85,
+            top: Column(
+              crossAxisAlignment: CrossAxisAlignment.stretch,
+              children: [
+                _MysqlSqlToolbar(
+                  onExecute: _running ? null : _execute,
+                  running: _running,
+                  queryTimeoutSeconds: _queryTimeoutSeconds,
+                  onQueryTimeoutChanged: _onStmtTimeoutChanged,
+                  onOpenPreferences: () => showPreferencesDialog(context),
+                  onOpenHistory: widget.connectionRow.id != null && !_running
+                      ? () {
+                          showSqlQueryHistoryDialog(
+                            context: context,
+                            connectionId: widget.connectionRow.id!,
+                            databaseName: widget.connectionRow.databaseName,
+                            sqlController: _sqlController,
+                          );
+                        }
+                      : null,
                 ),
-              ),
-            ],
-          ),
-          bottom: Column(
-            crossAxisAlignment: CrossAxisAlignment.stretch,
-            children: [
-              material.Container(
-                constraints: const material.BoxConstraints(minHeight: 44),
-                padding: const material.EdgeInsets.symmetric(
-                  horizontal: 12,
+                const Divider(height: 1),
+                Expanded(
+                  child: QueryEditorTab(
+                    controller: _sqlController,
+                    fontSize: _editorFontSize,
+                  ),
                 ),
-                decoration: material.BoxDecoration(
-                  color: theme.colorScheme.muted.withValues(alpha: 0.6),
+              ],
+            ),
+            bottom: Column(
+              crossAxisAlignment: CrossAxisAlignment.stretch,
+              children: [
+                material.Container(
+                  constraints: const material.BoxConstraints(minHeight: 44),
+                  padding: const material.EdgeInsets.symmetric(
+                    horizontal: 12,
+                  ),
+                  decoration: material.BoxDecoration(
+                    color: theme.colorScheme.muted.withValues(alpha: 0.6),
+                  ),
+                  alignment: material.Alignment.centerLeft,
+                  child: const Text('Data Output').semiBold().small(),
                 ),
-                alignment: material.Alignment.centerLeft,
-                child: const Text('Data Output').semiBold().small(),
-              ),
-              const Divider(height: 1),
-              Expanded(
-                child: ResultsTab(
-                  columns: _columns,
-                  rows: _rows,
-                  errorMessage: _error,
-                  isLoading: _running,
-                  affectedRows: _affectedRows,
-                  statusLine: _statusLine,
+                const Divider(height: 1),
+                Expanded(
+                  child: ResultsTab(
+                    columns: _columns,
+                    rows: _rows,
+                    errorMessage: _error,
+                    isLoading: _running,
+                    affectedRows: _affectedRows,
+                    statusLine: _statusLine,
+                  ),
                 ),
-              ),
-            ],
+              ],
+            ),
           ),
         ),
       ),