implemented full keyboard navigation support

[IsxImattI]

Summary

Brief description of the changes.

Type of Change

• Bug fix
• New feature
• Improvement/refactor
• Documentation
• Other

Related Issue

Fixes #6

Changes Made

• added InputBindings to MainWindow for F5 (Home), Ctrl+F (Search), Ctrl+S (Save), Ctrl+N (New), and Esc (Close Tab).

• developed a FindVisualChild utility in MainWindow.xaml.cs to programmatically focus the search TextBox within complex DataTemplates when Ctrl+F is pressed.

• assigned logical TabIndex values to all interactive elements in CenterTemplate, ListTemplate, and TransactionFormTemplate.

• added _ prefix to Content properties of primary buttons (Save, Clear, Void, New, Edit, etc.) to enable Alt + Key shortcuts.

• connected global shortcuts to ViewModel commands using a custom RelayCommand implementation.

Screenshots

N/A

Checklist

• I have tested my changes locally
• My code follows Clean Architecture (dependencies flow inward)
• ViewModels follow MVVM pattern
• I have added tests for new business logic

[Copilot]

Pull request overview

Adds app-wide keyboard navigation support in the WPF shell by wiring global shortcuts and improving tab/Alt-key navigation across key views, addressing Issue #6’s “power user” keyboard workflow goal.

Changes:

• Added Window.InputBindings in MainWindow for Home/Find/Close Tab/Save/New shortcuts.
• Implemented code-behind command handlers for global actions (focus search, close tab, global save/new) plus a visual-tree helper.
• Updated shared DataTemplates to include TabIndex ordering and access keys (underscored button content).

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 6 comments.

File	Description
src/Presentation/QBD.WPF/Themes/DataTemplates.xaml	Adds TabIndex values and access keys (_) for keyboard navigation within templates.
src/Presentation/QBD.WPF/MainWindow.xaml	Adds global KeyBindings for keyboard shortcuts at the window level.
src/Presentation/QBD.WPF/MainWindow.xaml.cs	Exposes commands for keybindings and implements global save/new/close/focus-search behaviors.

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[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

Comments suppressed due to low confidence (1)

src/Presentation/QBD.WPF/Themes/DataTemplates.xaml:116

• CenterTemplate: only the filter TextBox/Button/ListBox have explicit TabIndex values, but the adjacent New/Edit buttons still have the default TabIndex (0). In WPF that will typically place New/Edit earlier in the tab sequence than the intended search-first flow, making tab navigation inconsistent. Assign TabIndex values to New/Edit (and any other focusable controls in this panel) consistent with the intended order; similarly consider adding access keys if you want Alt+Key parity with ListTemplate.

                <StackPanel DockPanel.Dock="Top" Orientation="Horizontal" Margin="8,4">
                    <Button Content="New" Command="{Binding NewEntityCommand}" Padding="8,2" Margin="0,0,4,0"/>
                    <Button Content="Edit" Command="{Binding EditEntityCommand}" Padding="8,2"/>
                </StackPanel>

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