feat: live refresh in the download/upload/task info modals

The info modals held a live reference to their model but only rendered
a snapshot taken when opened, so progress, state, duration and speed
froze until the modal was reopened.

Subscribe each modal to the aggregated throttled TransactionsChanged
event while it is visible (subscribed on ShowModal, unsubscribed on
HideModal and Dispose) and re-render on the UI thread, following the
same pattern the transfer tables use.

Author: mateof

TelegramDownloader/Pages/Modals/InfoModals/DownloadFileInfoModal.razor

@@ -1,5 +1,8 @@
 @using TelegramDownloader.Models
 @using TelegramDownloader.Services
+@implements IDisposable
+
+@inject TransactionInfoService tis
 
 <style>
     .download-info-modal-overlay {
@@ -416,13 +419,19 @@
         this.downloadModel = downloadModel;
         if (this.downloadModel != null)
         {
+            // Live refresh while the modal is open: the model reference is live,
+            // so re-rendering on the aggregated (throttled) transactions event
+            // keeps progress, state, duration and speed up to date.
+            tis.TransactionsChanged -= OnTransactionsChanged;
+            tis.TransactionsChanged += OnTransactionsChanged;
             isVisible = true;
             StateHasChanged();
         }
     }
 
     private async Task HideModal()
     {
+        tis.TransactionsChanged -= OnTransactionsChanged;
         isVisible = false;
         StateHasChanged();
 
@@ -432,6 +441,21 @@
         }
     }
 
+    private async void OnTransactionsChanged(object sender, System.EventArgs e)
+    {
+        if (!isVisible) return;
+        try
+        {
+            await InvokeAsync(StateHasChanged);
+        }
+        catch { }
+    }
+
+    public void Dispose()
+    {
+        tis.TransactionsChanged -= OnTransactionsChanged;
+    }
+
     private async Task OnOverlayClick()
     {
         await HideModal();

TelegramDownloader/Pages/Modals/InfoModals/TaskInfoModal.razor

@@ -1,5 +1,8 @@
 @using TelegramDownloader.Models
 @using TelegramDownloader.Services
+@implements IDisposable
+
+@inject TransactionInfoService tis
 
 <style>
     .task-info-modal-overlay {
@@ -465,13 +468,19 @@
         this.taskModel = taskModel;
         if (this.taskModel != null)
         {
+            // Live refresh while the modal is open: the model reference is live,
+            // so re-rendering on the aggregated (throttled) transactions event
+            // keeps progress, state, duration and file counters up to date.
+            tis.TransactionsChanged -= OnTransactionsChanged;
+            tis.TransactionsChanged += OnTransactionsChanged;
             isVisible = true;
             StateHasChanged();
         }
     }
 
     private async Task HideModal()
     {
+        tis.TransactionsChanged -= OnTransactionsChanged;
         isVisible = false;
         StateHasChanged();
 
@@ -481,6 +490,21 @@
         }
     }
 
+    private async void OnTransactionsChanged(object sender, System.EventArgs e)
+    {
+        if (!isVisible) return;
+        try
+        {
+            await InvokeAsync(StateHasChanged);
+        }
+        catch { }
+    }
+
+    public void Dispose()
+    {
+        tis.TransactionsChanged -= OnTransactionsChanged;
+    }
+
     private async Task OnOverlayClick()
     {
         await HideModal();

TelegramDownloader/Pages/Modals/InfoModals/UploadFileInfoModal.razor

@@ -1,5 +1,8 @@
 @using TelegramDownloader.Models
 @using TelegramDownloader.Services
+@implements IDisposable
+
+@inject TransactionInfoService tis
 
 <style>
     .upload-modal-overlay {
@@ -422,13 +425,19 @@
         this.uploadModel = uploadModel;
         if (this.uploadModel != null)
         {
+            // Live refresh while the modal is open: the model reference is live,
+            // so re-rendering on the aggregated (throttled) transactions event
+            // keeps progress, state, duration and speed up to date.
+            tis.TransactionsChanged -= OnTransactionsChanged;
+            tis.TransactionsChanged += OnTransactionsChanged;
             isVisible = true;
             StateHasChanged();
         }
     }
 
     private async Task HideModal()
     {
+        tis.TransactionsChanged -= OnTransactionsChanged;
         isVisible = false;
         StateHasChanged();
 
@@ -438,6 +447,21 @@
         }
     }
 
+    private async void OnTransactionsChanged(object sender, System.EventArgs e)
+    {
+        if (!isVisible) return;
+        try
+        {
+            await InvokeAsync(StateHasChanged);
+        }
+        catch { }
+    }
+
+    public void Dispose()
+    {
+        tis.TransactionsChanged -= OnTransactionsChanged;
+    }
+
     private async Task OnOverlayClick()
     {
         await HideModal();