Fix build and behavior issues in the admin panel log viewer

- Resources.resx: close the unterminated DownloadFile data element, which
  made the file invalid XML, and remove the duplicated Actions and Refresh
  entries which already exist.
- Resources.Designer.cs: restore the UTF-8 BOM and put the new properties
  into the alphabetical order the strongly typed resource builder produces,
  so the file matches its generated form again.
- LogFiles.razor: import the collocated script from ./Pages/LogFiles.razor.js.
  The _content/{PackageId} prefix only applies to razor class libraries, so
  the import failed for this web application and the module was never loaded.
- LogFiles.razor: follow the new entries in live mode again by using the
  isScrolledToBottom helper, so the terminal scrolls along unless the user
  scrolled up to read the history.
- LogFiles.razor: only catch the expected javascript interop exceptions and
  log a failing module import instead of swallowing it silently.
- LogFiles.razor: restore the BOM and the trailing newline.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Vjs6n29WzQx8pGg3KJPGXk
(cherry picked from commit 7be969ea7b2a9b7441a8c5a65cc8a0928009d595)

src/Web/AdminPanel/Pages/LogFiles.razor

@@ -1,9 +1,11 @@
 @page "/logfiles"
 
 @using System.IO
+@using Microsoft.Extensions.Logging
 @using MUnique.OpenMU.Web.AdminPanel.Properties
 @implements IAsyncDisposable
 @inject IJSRuntime JSRuntime
+@inject ILogger<LogFiles> Logger
 
 <PageTitle>OpenMU: @Resources.LogFiles</PageTitle>
 <Breadcrumb IsFirstFromRoot="true" Caption="@Resources.LogFiles"/>
@@ -103,7 +105,7 @@
                         </div>
                     </div>
                     
-                    <div id="log-terminal" class="p-3 rounded" style="height: 480px; overflow-y: auto; font-family: 'Consolas', 'Liberation Mono', Menlo, Courier, monospace; font-size: 13px; line-height: 1.5; white-space: pre-wrap; background-color: #0c0c0d !important; border: 1px solid #2d2d30;">
+                    <div id="@TerminalElementId" class="p-3 rounded" style="height: 480px; overflow-y: auto; font-family: 'Consolas', 'Liberation Mono', Menlo, Courier, monospace; font-size: 13px; line-height: 1.5; white-space: pre-wrap; background-color: #0c0c0d !important; border: 1px solid #2d2d30;">
                         @if (this._logLines.Count == 0)
                         {
                             <div class="text-muted text-center py-5">@Resources.NoLogEntriesFound</div>
@@ -139,6 +141,7 @@
     private const int MaxLogLinesToRead = 300;
     private const long LogReadBufferSizeBytes = 102400; // 100 KB
     private const int LiveUpdateIntervalMs = 2000;
+    private const string TerminalElementId = "log-terminal";
 
     private readonly List<FileInfo> _files = new();
     private FileInfo? _selectedFile;
@@ -164,9 +167,9 @@
             {
                 await this._jsModule.DisposeAsync();
             }
-            catch
+            catch (JSDisconnectedException)
             {
-                // Ignore JS module disposal errors
+                // The circuit is already gone, so the module is disposed anyway.
             }
         }
     }
@@ -184,11 +187,16 @@
         {
             try
             {
-                this._jsModule = await this.JSRuntime.InvokeAsync<IJSObjectReference>("import", "./_content/MUnique.OpenMU.Web.AdminPanel/Pages/LogFiles.razor.js");
+                this._jsModule = await this.JSRuntime.InvokeAsync<IJSObjectReference>("import", "./Pages/LogFiles.razor.js");
             }
-            catch
+            catch (JSException ex)
             {
-                // Fallback gracefully if JS module import fails
+                // Without the module, the viewer still works - only the automatic scrolling is unavailable.
+                this.Logger.LogWarning(ex, "Could not load the log viewer javascript module.");
+            }
+            catch (JSDisconnectedException)
+            {
+                // The circuit is gone; nothing to do.
             }
         }
 
@@ -333,7 +341,7 @@
                     return;
                 }
 
-                this.InvokeAsync(() =>
+                this.InvokeAsync(async () =>
                 {
                     if (this._disposed || this._selectedFile == null)
                     {
@@ -341,11 +349,16 @@
                     }
 
                     var updatedInfo = new FileInfo(this._selectedFile.FullName);
-                    if (updatedInfo.Length != this._lastFileLength || updatedInfo.LastWriteTimeUtc != this._lastFileWriteTime)
+                    if (updatedInfo.Length == this._lastFileLength && updatedInfo.LastWriteTimeUtc == this._lastFileWriteTime)
                     {
-                        this.RefreshLogLines();
+                        return;
-                        this.StateHasChanged();
                     }
+
+                    // Only follow the new entries when the user didn't scroll up to read the history.
+                    var isFollowing = await this.IsScrolledToBottomAsync();
+                    this.RefreshLogLines();
+                    this._shouldScrollToBottom = isFollowing;
+                    this.StateHasChanged();
                 });
             }, null, 0, LiveUpdateIntervalMs);
         }
@@ -387,16 +400,35 @@
 
     private async Task ScrollToBottomAsync()
     {
-        if (this._jsModule != null)
+        if (this._jsModule is null)
         {
-            try
+            return;
-            {
+        }
-                await this._jsModule.InvokeVoidAsync("scrollToBottom", "log-terminal");
+
-            }
+        try
-            catch
+        {
-            {
+            await this._jsModule.InvokeVoidAsync("scrollToBottom", TerminalElementId);
-                // Ignore JS call errors
+        }
-            }
+        catch (JSDisconnectedException)
+        {
+            // The circuit is gone; nothing to do.
         }
     }
-}
+
+    private async ValueTask<bool> IsScrolledToBottomAsync()
+    {
+        if (this._jsModule is null)
+        {
+            return true;
+        }
+
+        try
+        {
+            return await this._jsModule.InvokeAsync<bool>("isScrolledToBottom", TerminalElementId);
+        }
+        catch (JSDisconnectedException)
+        {
+            return false;
+        }
+    }
+}

src/Web/AdminPanel/Properties/Resources.Designer.cs

@@ -1,4 +1,4 @@
-//------------------------------------------------------------------------------
+//------------------------------------------------------------------------------
 // <auto-generated>
 //     This code was generated by a tool.
 //     Runtime Version:4.0.30319.42000
@@ -249,6 +249,15 @@ namespace MUnique.OpenMU.Web.AdminPanel.Properties {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Close.
+        /// </summary>
+        public static string Close {
+            get {
+                return ResourceManager.GetString("Close", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Command.
         /// </summary>
@@ -468,6 +477,15 @@ namespace MUnique.OpenMU.Web.AdminPanel.Properties {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Download File.
+        /// </summary>
+        public static string DownloadFile {
+            get {
+                return ResourceManager.GetString("DownloadFile", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Drop item groups.
         /// </summary>
@@ -558,6 +576,15 @@ namespace MUnique.OpenMU.Web.AdminPanel.Properties {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Filter log entries....
+        /// </summary>
+        public static string FilterLogEntries {
+            get {
+                return ResourceManager.GetString("FilterLogEntries", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Finished! Have fun :).
         /// </summary>
@@ -774,6 +801,15 @@ namespace MUnique.OpenMU.Web.AdminPanel.Properties {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Live.
+        /// </summary>
+        public static string Live {
+            get {
+                return ResourceManager.GetString("Live", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Live Map.
         /// </summary>
@@ -819,6 +855,15 @@ namespace MUnique.OpenMU.Web.AdminPanel.Properties {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Log Viewer.
+        /// </summary>
+        public static string LogViewer {
+            get {
+                return ResourceManager.GetString("LogViewer", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Major.
         /// </summary>
@@ -972,6 +1017,24 @@ namespace MUnique.OpenMU.Web.AdminPanel.Properties {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to No log entries found..
+        /// </summary>
+        public static string NoLogEntriesFound {
+            get {
+                return ResourceManager.GetString("NoLogEntriesFound", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to No log entries match your filter..
+        /// </summary>
+        public static string NoLogEntriesMatchFilter {
+            get {
+                return ResourceManager.GetString("NoLogEntriesMatchFilter", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to This command has no parameters..
         /// </summary>
@@ -1197,6 +1260,15 @@ namespace MUnique.OpenMU.Web.AdminPanel.Properties {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Reload File List.
+        /// </summary>
+        public static string ReloadFileList {
+            get {
+                return ResourceManager.GetString("ReloadFileList", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Remove.
         /// </summary>
@@ -1260,6 +1332,15 @@ namespace MUnique.OpenMU.Web.AdminPanel.Properties {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Scroll to Bottom.
+        /// </summary>
+        public static string ScrollToBottom {
+            get {
+                return ResourceManager.GetString("ScrollToBottom", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Search.
         /// </summary>
@@ -1377,6 +1458,15 @@ namespace MUnique.OpenMU.Web.AdminPanel.Properties {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Showing {0} of {1} lines (Last {2} lines loaded)..
+        /// </summary>
+        public static string ShowingXOfYLines {
+            get {
+                return ResourceManager.GetString("ShowingXOfYLines", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Size.
         /// </summary>
@@ -1646,95 +1736,5 @@ namespace MUnique.OpenMU.Web.AdminPanel.Properties {
                 return ResourceManager.GetString("YesCreateTestAccounts", resourceCulture);
             }
         }
-
-        /// <summary>
-        ///   Looks up a localized string similar to Log Viewer.
-        /// </summary>
-        public static string LogViewer {
-            get {
-                return ResourceManager.GetString("LogViewer", resourceCulture);
-            }
-        }
-
-        /// <summary>
-        ///   Looks up a localized string similar to Live.
-        /// </summary>
-        public static string Live {
-            get {
-                return ResourceManager.GetString("Live", resourceCulture);
-            }
-        }
-
-        /// <summary>
-        ///   Looks up a localized string similar to Close.
-        /// </summary>
-        public static string Close {
-            get {
-                return ResourceManager.GetString("Close", resourceCulture);
-            }
-        }
-
-        /// <summary>
-        ///   Looks up a localized string similar to Filter log entries....
-        /// </summary>
-        public static string FilterLogEntries {
-            get {
-                return ResourceManager.GetString("FilterLogEntries", resourceCulture);
-            }
-        }
-
-        /// <summary>
-        ///   Looks up a localized string similar to No log entries found..
-        /// </summary>
-        public static string NoLogEntriesFound {
-            get {
-                return ResourceManager.GetString("NoLogEntriesFound", resourceCulture);
-            }
-        }
-
-        /// <summary>
-        ///   Looks up a localized string similar to No log entries match your filter..
-        /// </summary>
-        public static string NoLogEntriesMatchFilter {
-            get {
-                return ResourceManager.GetString("NoLogEntriesMatchFilter", resourceCulture);
-            }
-        }
-
-        /// <summary>
-        ///   Looks up a localized string similar to Showing {0} of {1} lines (Last {2} lines loaded)..
-        /// </summary>
-        public static string ShowingXOfYLines {
-            get {
-                return ResourceManager.GetString("ShowingXOfYLines", resourceCulture);
-            }
-        }
-
-        /// <summary>
-        ///   Looks up a localized string similar to Scroll to Bottom.
-        /// </summary>
-        public static string ScrollToBottom {
-            get {
-                return ResourceManager.GetString("ScrollToBottom", resourceCulture);
-            }
-        }
-
-        /// <summary>
-        ///   Looks up a localized string similar to Reload File List.
-        /// </summary>
-        public static string ReloadFileList {
-            get {
-                return ResourceManager.GetString("ReloadFileList", resourceCulture);
-            }
-        }
-
-        /// <summary>
-        ///   Looks up a localized string similar to Download File.
-        /// </summary>
-        public static string DownloadFile {
-            get {
-                return ResourceManager.GetString("DownloadFile", resourceCulture);
-            }
-        }
     }
 }

src/Web/AdminPanel/Properties/Resources.resx

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <root>
   <!-- 
     Microsoft ResX Schema 
@@ -612,18 +612,12 @@
   <data name="Target" xml:space="preserve">
     <value>Target</value>
   </data>
-  <data name="Actions" xml:space="preserve">
-    <value>Actions</value>
-  </data>
   <data name="LogViewer" xml:space="preserve">
     <value>Log Viewer</value>
   </data>
   <data name="Live" xml:space="preserve">
     <value>Live</value>
   </data>
-  <data name="Refresh" xml:space="preserve">
-    <value>Refresh</value>
-  </data>
   <data name="Close" xml:space="preserve">
     <value>Close</value>
   </data>