feat: add /meta command for channel metadata retrieval

- Implemented the `/meta` command to fetch and display channel metadata including room ID, topic, message count, unique user count, estimated size, and protection level.
- Added `ChannelMetaDto` to encapsulate channel metadata.
- Updated `ChannelsController` to handle the new `/meta` endpoint.
- Introduced `UploadLimits` configuration for admin-defined upload size limits for files, images, audio, and avatars.
- Enhanced error handling and user feedback for metadata retrieval.
- Updated documentation to reflect changes in encryption and room metadata.
- Added tests for the new functionality and upload limits.

src/EchoHub.Client/AppOrchestrator.cs

@@ -127,6 +127,7 @@ public sealed class AppOrchestrator : IDisposable
         _commandHandler.OnLeaveChannel += HandleCmdLeaveChannel;
         _commandHandler.OnSetTopic += HandleCmdSetTopic;
         _commandHandler.OnListUsers += HandleCmdListUsers;
+        _commandHandler.OnRoomInfo += HandleCmdMeta;
         _commandHandler.OnKickUser += HandleCmdKickUser;
         _commandHandler.OnBanUser += HandleCmdBanUser;
         _commandHandler.OnUnbanUser += HandleCmdUnbanUser;
@@ -611,6 +612,46 @@ public sealed class AppOrchestrator : IDisposable
         }
     }
 
+    private async Task HandleCmdMeta()
+    {
+        if (!_conn.IsConnected || _conn.Api is null) return;
+
+        var channel = _mainWindow.CurrentChannel;
+        if (string.IsNullOrEmpty(channel)) return;
+
+        try
+        {
+            var meta = await _conn.Api.GetChannelMetaAsync(channel);
+            if (meta is null)
+            {
+                InvokeUI(() => _mainWindow.ShowError($"Channel #{channel} not found."));
+                return;
+            }
+
+            var size = meta.EstimatedSizeBytes <= 0 ? "0 B" : ChatMessageManager.FormatFileSize(meta.EstimatedSizeBytes);
+            var protection = meta.IsEncrypted ? "end-to-end encrypted"
+                : meta.IsProtected ? "password-protected"
+                : "open";
+
+            InvokeUI(() =>
+            {
+                _messageManager.AddSystemMessage(channel, $"Room info for #{meta.Name}:");
+                if (!string.IsNullOrWhiteSpace(meta.Topic))
+                    _messageManager.AddSystemMessage(channel, $"  Topic         {meta.Topic}");
+                _messageManager.AddSystemMessage(channel, $"  Room ID       {meta.Id}");
+                _messageManager.AddSystemMessage(channel, $"  Created       {meta.CreatedAt.ToLocalTime():g}");
+                _messageManager.AddSystemMessage(channel, $"  Messages      {meta.MessageCount}");
+                _messageManager.AddSystemMessage(channel, $"  Unique users  {meta.UniqueUserCount}");
+                _messageManager.AddSystemMessage(channel, $"  Est. size     {size}");
+                _messageManager.AddSystemMessage(channel, $"  Protection    {protection}");
+            });
+        }
+        catch (Exception ex)
+        {
+            InvokeUI(() => _mainWindow.ShowError($"Failed to fetch room info: {ex.Message}"));
+        }
+    }
+
     private async Task HandleCmdKickUser(string username, string? reason)
     {
         if (!_conn.IsAuthenticated) return;

src/EchoHub.Client/Commands/CommandHandler.cs

@@ -21,6 +21,7 @@ public class CommandHandler
     public event Func<Task>? OnLeaveChannel;
     public event Func<string, Task>? OnSetTopic;
     public event Func<Task>? OnListUsers;
+    public event Func<Task>? OnRoomInfo;
     public event Func<string, Task>? OnSetAvatar;
     public event Func<string, string?, Task>? OnKickUser;
     public event Func<string, string?, Task>? OnBanUser;
@@ -62,6 +63,7 @@ public class CommandHandler
             "leave" => await HandleLeave(),
             "topic" => await HandleTopic(args),
             "users" => await HandleUsers(),
+            "meta" or "info" => await HandleMeta(),
             "kick" => await HandleKick(args),
             "ban" => await HandleBan(args),
             "unban" => await HandleUnban(args),
@@ -273,6 +275,13 @@ public class CommandHandler
         return new CommandResult(true);
     }
 
+    private async Task<CommandResult> HandleMeta()
+    {
+        if (OnRoomInfo is not null)
+            await OnRoomInfo();
+        return new CommandResult(true);
+    }
+
     private async Task<CommandResult> HandleQuit()
     {
         if (OnQuit is not null)
@@ -403,6 +412,7 @@ public class CommandHandler
               /leave                               - Leave current channel
               /topic <text>                        - Set channel topic
               /users                               - List online users
+              /meta                                - Show room info (size, messages, users, created, id)
             Moderation:
               /kick <user> [reason]                - Kick a user (Mod+)
               /ban <user> [reason]                 - Ban a user (Admin+)

src/EchoHub.Client/Services/ApiClient.cs

@@ -271,6 +271,20 @@ public sealed class ApiClient : IDisposable
         return await response.Content.ReadFromJsonAsync<ChannelCryptoDto>();
     }
 
+    /// <summary>
+    /// Fetches a channel's human-facing metadata (message count, unique posters, estimated
+    /// size, created date, room id) for the <c>/meta</c> command. Returns null if it doesn't exist.
+    /// </summary>
+    public async Task<ChannelMetaDto?> GetChannelMetaAsync(string channelName)
+    {
+        EnsureAuthenticated();
+        using var response = await AuthenticatedGetAsync($"/api/channels/{Uri.EscapeDataString(channelName)}/meta");
+        if (response.StatusCode == System.Net.HttpStatusCode.NotFound)
+            return null;
+        await EnsureSuccessAsync(response);
+        return await response.Content.ReadFromJsonAsync<ChannelMetaDto>();
+    }
+
     public async Task<ChannelDto?> RekeyChannelAsync(string channelName, RekeyChannelRequest request)
     {
         EnsureAuthenticated();

src/EchoHub.Client/Services/UpdateChecker.cs

@@ -1,3 +1,5 @@
+using System.Text;
+
 using AlwaysUpToDate;
 
 using EchoHub.Client.UI.Dialogs;
@@ -88,6 +90,10 @@ public sealed class UpdateChecker : IDisposable
     private async Task ApplyUpdateAsync()
     {
         _applying = true;
+
+        // The TUI restored the console on shutdown; make sure the block-glyph bar renders.
+        try { Console.OutputEncoding = Encoding.UTF8; } catch { /* redirected/non-interactive */ }
+
         Console.WriteLine();
         Console.WriteLine($"Updating EchoHub to v{_pendingVersion}...");
 
@@ -106,23 +112,49 @@ public sealed class UpdateChecker : IDisposable
         await _updater.UpdateAsync(); // download → extract → restart → Environment.Exit(0)
     }
 
+    private const int BarWidth = 28;
+
     private void OnProgressChanged(UpdateStep step, long itemsProcessed, long? totalItems, double? progressPercentage)
     {
         // Before the TUI is torn down (i.e. during a check) there is no progress surface; the
-        // real work happens headless after shutdown, so report it on the console.
+        // real work happens headless after shutdown, so draw a progress bar on the console.
         if (!_applying)
             return;
 
+        // Finish the previous step's line so each step keeps its completed bar.
         if (step != _lastStep)
         {
-            Console.WriteLine();
+            if (_lastStep != (UpdateStep)(-1))
+                Console.WriteLine();
             _lastStep = step;
         }
 
-        var pct = progressPercentage ?? 0;
-        Console.Write($"\r  {step}: {itemsProcessed}/{totalItems ?? 0} ({pct:F0}%)   ");
+        var label = Humanize(step);
+
+        if (progressPercentage is { } percent)
+        {
+            var pct = (int)Math.Clamp(Math.Round(percent), 0, 100);
+            var filled = pct * BarWidth / 100;
+            var bar = new string('█', filled) + new string('░', BarWidth - filled); // █ / ░
+            Console.Write($"\r  {label,-13} [{bar}] {pct,3}%   ");
+        }
+        else
+        {
+            // Steps with no measurable total (verifying, restarting): show an indeterminate marker.
+            Console.Write($"\r  {label,-13} working...   ");
+        }
     }
 
+    private static string Humanize(UpdateStep step) => step switch
+    {
+        UpdateStep.Downloading => "Downloading",
+        UpdateStep.VerifyingChecksum => "Verifying",
+        UpdateStep.Extracting => "Extracting",
+        UpdateStep.CleaningUp => "Cleaning up",
+        UpdateStep.Restarting => "Restarting",
+        _ => step.ToString(),
+    };
+
     private void OnUpdateStarted(string version)
     {
         Log.Information("Update started: v{Version}", version);

src/EchoHub.Client/UI/Chat/ChatMessageManager.cs

@@ -451,10 +451,17 @@ public sealed class ChatMessageManager
 
     private static string FormatDateTime(DateTimeOffset timestamp)
     {
-        if (timestamp.Date == DateTimeOffset.Now.Date)
-            return timestamp.ToLocalTime().ToString("t");
-        else
-            return timestamp.ToLocalTime().ToString("g");
+        // Server timestamps arrive in UTC; convert to local before deciding the calendar day,
+        // otherwise a "today" message near midnight is misclassified against the local date.
+        var local = timestamp.ToLocalTime();
+
+        // Today's messages show a compact date + short time; older messages fall back to the
+        // culture's general short date/time. Both always include the date so new messages
+        // are never left date-less.
+        if (local.Date == DateTimeOffset.Now.Date)
+            return $"{local:d} {local:t}";
+
+        return local.ToString("g");
     }
 
     internal static string FormatFileSize(long? bytes)

src/EchoHub.Client/UI/Dialogs/UpdateProgressDialog.cs

@@ -1,61 +0,0 @@
-using Terminal.Gui.App;
-using Terminal.Gui.Views;
-using Terminal.Gui.ViewBase;
-
-namespace EchoHub.Client.UI.Dialogs;
-
-public sealed class UpdateProgressDialog
-{
-    private readonly Dialog _dialog;
-    private readonly ProgressBar _progressBar;
-    private readonly Label _infoLabel;
-    private readonly IApplication _app;
-
-    public UpdateProgressDialog(IApplication app, string newVersion)
-    {
-        _app = app;
-
-        _dialog = new Dialog { Title = $"Updating to {newVersion}", Width = 50, Height = 10 };
-
-        _infoLabel = new Label
-        {
-            Text = "Preparing update...",
-            X = 1,
-            Y = 1,
-            Width = Dim.Fill(2)
-        };
-
-        _progressBar = new ProgressBar
-        {
-            X = 1,
-            Y = 3,
-            Width = Dim.Fill(2),
-            Fraction = 0f
-        };
-
-        var cancelButton = new Button
-        {
-            Text = "Cancel",
-            X = Pos.Center(),
-            Y = 6
-        };
-
-        _dialog.Add(_infoLabel, _progressBar);
-    }
-
-    public void UpdateProgress(float fraction, string statusText)
-    {
-        _progressBar.Fraction = fraction;
-        _infoLabel.Text = statusText;
-    }
-
-    public void Show()
-    {
-        _app.Run(_dialog);
-    }
-
-    public void Close()
-    {
-        _app.RequestStop();
-    }
-}