feat(admin): restore Blazor WebAssembly architecture for admin pages with hybrid Server routing

TaxBaik.Web.Client/Services/AdminClients/ITaxFilingScheduleBrowserClient.cs

@@ -0,0 +1,136 @@
+namespace TaxBaik.Web.Services.AdminClients;
+
+using System.Text.Json;
+using TaxBaik.Domain.Entities;
+
+public interface ITaxFilingScheduleBrowserClient
+{
+    Task<List<TaxFilingSchedule>> GetAllAsync(CancellationToken ct = default);
+    Task<TaxFilingSchedule?> GetByIdAsync(int id, CancellationToken ct = default);
+    Task<List<TaxFilingSchedule>> GetByClientIdAsync(int clientId, CancellationToken ct = default);
+    Task<List<TaxFilingSchedule>> GetUpcomingDuesAsync(int daysAhead = 30, CancellationToken ct = default);
+    Task<int> CreateAsync(int clientId, string filingType, DateTime dueDate, int filingYear,
+        int? assignedTo = null, CancellationToken ct = default);
+    Task MarkCompletedAsync(int id, CancellationToken ct = default);
+    Task DeleteAsync(int id, CancellationToken ct = default);
+}
+
+public class TaxFilingScheduleBrowserClient(HttpClient httpClient, ITokenStore tokenStore, ILogger<TaxFilingScheduleBrowserClient> logger)
+    : ITaxFilingScheduleBrowserClient
+{
+    private const string BaseUrl = "/api/taxfilingschedule";
+
+    private void EnsureAuthHeader()
+    {
+        if (!string.IsNullOrEmpty(tokenStore.AccessToken))
+            httpClient.DefaultRequestHeaders.Authorization = new("Bearer", tokenStore.AccessToken);
+        else
+            httpClient.DefaultRequestHeaders.Authorization = null;
+    }
+
+    public async Task<List<TaxFilingSchedule>> GetAllAsync(CancellationToken ct = default)
+    {
+        try
+        {
+            EnsureAuthHeader();
+            return await httpClient.GetFromJsonAsync<List<TaxFilingSchedule>>($"{BaseUrl}", ct) ?? [];
+        }
+        catch (Exception ex)
+        {
+            logger.LogError(ex, "Failed to get tax filing schedules");
+            return [];
+        }
+    }
+
+    public async Task<TaxFilingSchedule?> GetByIdAsync(int id, CancellationToken ct = default)
+    {
+        try
+        {
+            EnsureAuthHeader();
+            return await httpClient.GetFromJsonAsync<TaxFilingSchedule>($"{BaseUrl}/{id}", ct);
+        }
+        catch (Exception ex)
+        {
+            logger.LogError(ex, "Failed to get tax filing schedule {Id}", id);
+            return null;
+        }
+    }
+
+    public async Task<List<TaxFilingSchedule>> GetByClientIdAsync(int clientId, CancellationToken ct = default)
+    {
+        try
+        {
+            EnsureAuthHeader();
+            return await httpClient.GetFromJsonAsync<List<TaxFilingSchedule>>($"{BaseUrl}/client/{clientId}", ct) ?? [];
+        }
+        catch (Exception ex)
+        {
+            logger.LogError(ex, "Failed to get filing schedules for client {ClientId}", clientId);
+            return [];
+        }
+    }
+
+    public async Task<List<TaxFilingSchedule>> GetUpcomingDuesAsync(int daysAhead = 30, CancellationToken ct = default)
+    {
+        try
+        {
+            EnsureAuthHeader();
+            var response = await httpClient.GetFromJsonAsync<JsonElement>($"{BaseUrl}/upcoming?daysAhead={daysAhead}", ct);
+            if (response.TryGetProperty("data", out var data))
+                return System.Text.Json.JsonSerializer.Deserialize<List<TaxFilingSchedule>>(data.GetRawText()) ?? [];
+            return [];
+        }
+        catch (Exception ex)
+        {
+            logger.LogError(ex, "Failed to get upcoming filings");
+            return [];
+        }
+    }
+
+    public async Task<int> CreateAsync(int clientId, string filingType, DateTime dueDate, int filingYear,
+        int? assignedTo = null, CancellationToken ct = default)
+    {
+        try
+        {
+            EnsureAuthHeader();
+            var request = new { clientId, filingType, dueDate, filingYear, assignedTo };
+            var response = await httpClient.PostAsJsonAsync(BaseUrl, request, ct);
+            response.EnsureSuccessStatusCode();
+            var result = await response.Content.ReadFromJsonAsync<JsonElement>(cancellationToken: ct);
+            return result.TryGetProperty("id", out var idProp) ? idProp.GetInt32() : 0;
+        }
+        catch (Exception ex)
+        {
+            logger.LogError(ex, "Failed to create tax filing schedule");
+            return 0;
+        }
+    }
+
+    public async Task MarkCompletedAsync(int id, CancellationToken ct = default)
+    {
+        try
+        {
+            EnsureAuthHeader();
+            var response = await httpClient.PutAsJsonAsync($"{BaseUrl}/{id}/complete", new { }, ct);
+            response.EnsureSuccessStatusCode();
+        }
+        catch (Exception ex)
+        {
+            logger.LogError(ex, "Failed to mark filing as completed {Id}", id);
+        }
+    }
+
+    public async Task DeleteAsync(int id, CancellationToken ct = default)
+    {
+        try
+        {
+            EnsureAuthHeader();
+            var response = await httpClient.DeleteAsync($"{BaseUrl}/{id}", ct);
+            response.EnsureSuccessStatusCode();
+        }
+        catch (Exception ex)
+        {
+            logger.LogError(ex, "Failed to delete tax filing schedule {Id}", id);
+        }
+    }
+}