feat: add withdrawal requests feature and update VAT loading mechanism

src/FrontOffice.Main/Shared/WeekSelector.razor

@@ -0,0 +1,38 @@
+@using FrontOffice.Main.Utilities
+@using MudBlazor
+
+<MudAutocomplete T="WeekDefinitionDto"
+                 @bind-Value="_selectedWeek"
+                 Label="@Label"
+                 Placeholder="@Placeholder"
+                 SearchFunc="SearchWeeksAsync"
+                 ToStringFunc="@(w => w?.DropdownDisplay ?? string.Empty)"
+                 Variant="@Variant"
+                 Dense="@Dense"
+                 Margin="@Margin"
+                 Clearable="@Clearable"
+                 ShowProgressIndicator="true"
+                 ProgressIndicatorColor="Color.Primary"
+                 AdornmentIcon="@Icons.Material.Filled.CalendarMonth"
+                 AdornmentColor="Color.Primary"
+                 Class="@Class"
+                 Style="@Style">
+    <ItemTemplate>
+        <MudStack Spacing="0" Class="py-1">
+            <MudStack Row="true" Justify="Justify.SpaceBetween" AlignItems="AlignItems.Center">
+                <MudText Typo="Typo.body1">
+                    @context.DisplayName
+                    @if (context.IsCurrentWeek)
+                    {
+                        <MudChip T="string" Size="Size.Small" Color="Color.Primary" Class="ms-2">هفته جاری</MudChip>
+                    }
+                </MudText>
+                <MudText Typo="Typo.caption" Class="mud-text-secondary">@context.PersianYear</MudText>
+            </MudStack>
+            <MudText Typo="Typo.caption" Class="mud-text-secondary">@context.DateRangeDisplay</MudText>
+        </MudStack>
+    </ItemTemplate>
+    <NoItemsTemplate>
+        <MudText Typo="Typo.body2" Class="pa-3">هفته‌ای یافت نشد</MudText>
+    </NoItemsTemplate>
+</MudAutocomplete>

src/FrontOffice.Main/Shared/WeekSelector.razor.cs

@@ -0,0 +1,210 @@
+using FrontOffice.Main.Utilities;
+using Microsoft.AspNetCore.Components;
+using MudBlazor;
+
+namespace FrontOffice.Main.Shared;
+
+public partial class WeekSelector : ComponentBase
+{
+    [Inject] private CommissionService CommissionService { get; set; } = default!;
+
+    /// <summary>
+    /// Selected week definition
+    /// </summary>
+    [Parameter] public WeekDefinitionDto? Value { get; set; }
+    
+    /// <summary>
+    /// Callback when week selection changes
+    /// </summary>
+    [Parameter] public EventCallback<WeekDefinitionDto?> ValueChanged { get; set; }
+
+    /// <summary>
+    /// Label for the input
+    /// </summary>
+    [Parameter] public string Label { get; set; } = "انتخاب هفته";
+    
+    /// <summary>
+    /// Placeholder text
+    /// </summary>
+    [Parameter] public string Placeholder { get; set; } = "هفته را انتخاب کنید...";
+    
+    /// <summary>
+    /// Input variant
+    /// </summary>
+    [Parameter] public Variant Variant { get; set; } = Variant.Outlined;
+    
+    /// <summary>
+    /// Dense mode
+    /// </summary>
+    [Parameter] public bool Dense { get; set; } = false;
+    
+    /// <summary>
+    /// Input margin
+    /// </summary>
+    [Parameter] public Margin Margin { get; set; } = Margin.Normal;
+    
+    /// <summary>
+    /// Allow clearing the selection
+    /// </summary>
+    [Parameter] public bool Clearable { get; set; } = true;
+    
+    /// <summary>
+    /// CSS class
+    /// </summary>
+    [Parameter] public string? Class { get; set; }
+
+    /// <summary>
+    /// Inline style
+    /// </summary>
+    [Parameter] public string? Style { get; set; }
+
+    /// <summary>
+    /// Persian year filter
+    /// </summary>
+    [Parameter] public int? PersianYear { get; set; }
+    
+    /// <summary>
+    /// Gregorian year filter
+    /// </summary>
+    [Parameter] public int? GregorianYear { get; set; }
+    
+    /// <summary>
+    /// Only show active weeks
+    /// </summary>
+    [Parameter] public bool? OnlyActive { get; set; } = true;
+
+    private WeekDefinitionDto? _selectedWeek
+    {
+        get => Value;
+        set
+        {
+            if (Value != value)
+            {
+                Value = value;
+                ValueChanged.InvokeAsync(value);
+            }
+        }
+    }
+    private List<WeekDefinitionDto> _cachedWeeks = new();
+    private bool _isLoading = false;
+
+    protected override async Task OnInitializedAsync()
+    {
+        // Pre-load weeks
+        await LoadWeeksAsync();
+    }
+
+    private async Task LoadWeeksAsync()
+    {
+        try
+        {
+            _isLoading = true;
+            _cachedWeeks = await CommissionService.GetWeekDefinitionsAsync(
+                searchText: null,
+                gregorianYear: GregorianYear,
+                persianYear: PersianYear,
+                isActive: OnlyActive,
+                pageSize: 100
+            );
+        }
+        catch
+        {
+            _cachedWeeks = new List<WeekDefinitionDto>();
+        }
+        finally
+        {
+            _isLoading = false;
+        }
+    }
+
+    private async Task<IEnumerable<WeekDefinitionDto>> SearchWeeksAsync(string searchText, CancellationToken cancellationToken)
+    {
+        // If cached weeks are empty, load them
+        if (!_cachedWeeks.Any())
+        {
+            await LoadWeeksAsync();
+        }
+
+        // Filter locally from cache
+        if (string.IsNullOrWhiteSpace(searchText))
+            return _cachedWeeks;
+
+        return _cachedWeeks.Where(w => 
+            w.DisplayName.Contains(searchText, StringComparison.OrdinalIgnoreCase) ||
+            w.StartDatePersian.Contains(searchText, StringComparison.OrdinalIgnoreCase) ||
+            w.EndDatePersian.Contains(searchText, StringComparison.OrdinalIgnoreCase));
+    }
+
+    private async Task OnWeekChanged(WeekDefinitionDto? week)
+    {
+        _selectedWeek = week;
+    }
+
+    /// <summary>
+    /// Get current week from cached weeks
+    /// </summary>
+    public WeekDefinitionDto? GetCurrentWeek()
+    {
+        return _cachedWeeks.FirstOrDefault(w => w.IsCurrentWeek);
+    }
+
+    /// <summary>
+    /// Select current week
+    /// </summary>
+    public async Task SelectCurrentWeekAsync()
+    {
+        var currentWeek = GetCurrentWeek();
+        if (currentWeek != null)
+        {
+            _selectedWeek = currentWeek;
+            StateHasChanged();
+        }
+        await Task.CompletedTask;
+    }
+
+    /// <summary>
+    /// Find week by WeekOrder number (e.g., 46 from ?week=46)
+    /// </summary>
+    public WeekDefinitionDto? FindByWeekOrder(int weekOrder)
+    {
+        return _cachedWeeks.FirstOrDefault(w => w.WeekOrder == weekOrder);
+    }
+
+    /// <summary>
+    /// Find week by Id
+    /// </summary>
+    public WeekDefinitionDto? FindById(long id)
+    {
+        return _cachedWeeks.FirstOrDefault(w => w.Id == id);
+    }
+
+    /// <summary>
+    /// Select week by WeekOrder
+    /// </summary>
+    public async Task SelectByWeekOrderAsync(int weekOrder)
+    {
+        var week = FindByWeekOrder(weekOrder);
+        if (week != null)
+        {
+            _selectedWeek = week;
+            StateHasChanged();
+        }
+        await Task.CompletedTask;
+    }
+
+    /// <summary>
+    /// Ensure weeks are loaded (useful for parent components)
+    /// </summary>
+    public async Task EnsureLoadedAsync()
+    {
+        if (!_cachedWeeks.Any())
+        {
+            await LoadWeeksAsync();
+        }
+    }
+
+    /// <summary>
+    /// Get all cached weeks
+    /// </summary>
+    public IReadOnlyList<WeekDefinitionDto> GetCachedWeeks() => _cachedWeeks.AsReadOnly();
+}