feat: magnetic snapped companion windows, real engine test flight, and UI decoupling

.gitignore

@@ -6,6 +6,10 @@
 # dotenv files
 .env
 
+# Worktrees
+.worktrees/
+worktrees/
+
 # User-specific files
 *.rsuser
 *.suo

Endpoints/ModelProxyEndpoints.cs

@@ -187,24 +187,24 @@ async Task<IResult> HandleDeleteModel(HttpContext context, IHttpClientFactory cl
                 var tag = !string.IsNullOrWhiteSpace(pipeline_tag) ? pipeline_tag : pipeline_tags;
 
                 string requestUrl;
+                var searchParam = !string.IsNullOrWhiteSpace(query) ? $"search={Uri.EscapeDataString(query)}&" : "";
                 if (!string.IsNullOrWhiteSpace(tag))
                 {
                     if (tag.Equals("gguf", StringComparison.OrdinalIgnoreCase))
                     {
-                        var qParam = string.IsNullOrWhiteSpace(query) ? "llama" : query;
-                        requestUrl = $"https://huggingface.co/api/models?search={Uri.EscapeDataString(qParam)}&filter=gguf&sort=downloads&direction=-1&limit=25";
+                        var qFallback = string.IsNullOrWhiteSpace(query) ? "search=llama&" : searchParam;
+                        requestUrl = $"https://huggingface.co/api/models?{qFallback}filter=gguf&sort=downloads&direction=-1&limit=25";
                     }
                     else
                     {
-                        var qParam = Uri.EscapeDataString(query);
                         var tagParam = Uri.EscapeDataString(tag);
-                        requestUrl = $"https://huggingface.co/api/models?search={qParam}&pipeline_tag={tagParam}&sort=downloads&direction=-1&limit=25";
+                        requestUrl = $"https://huggingface.co/api/models?{searchParam}pipeline_tag={tagParam}&sort=downloads&direction=-1&limit=25";
                     }
                 }
                 else
                 {
-                    var qParam = string.IsNullOrWhiteSpace(query) ? "llama" : query;
-                    requestUrl = $"https://huggingface.co/api/models?search={Uri.EscapeDataString(qParam)}&filter=gguf&sort=downloads&direction=-1&limit=25";
+                    var qFallback = string.IsNullOrWhiteSpace(query) ? "search=llama&" : searchParam;
+                    requestUrl = $"https://huggingface.co/api/models?{qFallback}filter=gguf&sort=downloads&direction=-1&limit=25";
                 }
 
                 using var req = new HttpRequestMessage(HttpMethod.Get, requestUrl);

LocalLLMServerManager.Shared/Interfaces/IAiAppTools.cs

@@ -5,7 +5,7 @@
 namespace LocalLLMServerManager.Shared.Interfaces;
 
 /// <summary>
-/// Natural Language Integration Bridge: allows the AI Copilot to query telemetry,
+/// Natural Language Integration Bridge: allows the AI Assist to query telemetry,
 /// manage engines, update settings, trigger workflows, and query documentation.
 /// </summary>
 public interface IAiAppTools

LocalLLMServerManager.Shared/Models/StudioPresetModels.cs

@@ -9,7 +9,9 @@ public enum StudioModality
 {
     Image,
     Video,
-    Audio
+    Audio,
+    Text,
+    Mesh
 }
 
 /// <summary>

LocalLLMServerManager.Shared/Services/HuggingFaceSearchService.cs

@@ -78,8 +78,9 @@ public async Task<List<HuggingFaceRepoItem>> SearchRepositoriesAsync(string apiB
     public async Task<List<HuggingFaceRepoItem>> SearchModelsAsync(string query, string? pipelineTag = null, System.Threading.CancellationToken ct = default)
     {
         using var http = new HttpClient();
-        var tagParam = string.IsNullOrWhiteSpace(pipelineTag) ? "" : $"&pipeline_tag={Uri.EscapeDataString(pipelineTag)}";
-        var requestUrl = $"https://huggingface.co/api/models?search={Uri.EscapeDataString(query)}{tagParam}&sort=downloads&direction=-1&limit=20";
+        var searchParam = string.IsNullOrWhiteSpace(query) ? "" : $"search={Uri.EscapeDataString(query)}&";
+        var tagParam = string.IsNullOrWhiteSpace(pipelineTag) ? "" : $"pipeline_tag={Uri.EscapeDataString(pipelineTag)}&";
+        var requestUrl = $"https://huggingface.co/api/models?{searchParam}{tagParam}sort=downloads&direction=-1&limit=20";
         var result = new List<HuggingFaceRepoItem>();
         try
         {

LocalLLMServerManager.Shared/Services/PromptManagementService.cs

@@ -151,8 +151,8 @@ private async Task<string> LoadPromptDocumentAsync(string fileName, string fallb
         return fallbackContent;
     }
 
-    private const string FallbackSystemPrompt = @"# LocalLLMServerManager AI Copilot — System Prompt
-You are the LocalLLMServerManager Copilot, an expert AI engineer integrated directly into the application.
+    private const string FallbackSystemPrompt = @"# LocalLLMServerManager AI Assist — System Prompt
+You are the LocalLLMServerManager AI Assist, an expert AI engineer integrated directly into the application.
 Guide users on models, workflows, and settings, and proactively use your tools to perform actions in the app.";
 
     private const string FallbackCapabilitiesPrompt = @"# Application Capabilities Reference

LocalLLMServerManager.Shared/Services/UiDiagnosticLogger.cs

@@ -0,0 +1,132 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace LocalLLMServerManager.Shared.Services;
+
+/// <summary>
+/// Represents a captured UI binding or diagnostic error entry.
+/// </summary>
+public record BindingDiagnosticEntry(DateTime Timestamp, string Message, string? Source = null);
+
+/// <summary>
+/// Interface for thread-safe UI diagnostic error logging.
+/// </summary>
+public interface IUiDiagnosticLogger
+{
+    /// <summary>
+    /// Records a new UI binding error.
+    /// </summary>
+    void RecordBindingError(string message, string? source = null);
+
+    /// <summary>
+    /// Retrieves the most recent binding diagnostic entries up to <paramref name="maxCount"/>.
+    /// </summary>
+    IReadOnlyList<BindingDiagnosticEntry> GetRecentErrors(int maxCount = 50);
+
+    /// <summary>
+    /// Clears all recorded diagnostic entries.
+    /// </summary>
+    void Clear();
+
+    /// <summary>
+    /// Exports a formatted diagnostic summary string.
+    /// </summary>
+    string ExportLogSummary();
+}
+
+/// <summary>
+/// Thread-safe bounded diagnostic logger service for UI binding errors.
+/// </summary>
+public class UiDiagnosticLogger : IUiDiagnosticLogger
+{
+    public const int DefaultMaxEntries = 500;
+
+    public static UiDiagnosticLogger Instance { get; } = new();
+
+    private readonly int _maxCapacity;
+    private readonly object _lock = new();
+    private readonly Queue<BindingDiagnosticEntry> _entries;
+
+    public int MaxCapacity => _maxCapacity;
+
+    public int Count
+    {
+        get
+        {
+            lock (_lock)
+            {
+                return _entries.Count;
+            }
+        }
+    }
+
+    public UiDiagnosticLogger(int maxCapacity = DefaultMaxEntries)
+    {
+        _maxCapacity = maxCapacity > 0 ? maxCapacity : DefaultMaxEntries;
+        _entries = new Queue<BindingDiagnosticEntry>(_maxCapacity);
+    }
+
+    public void RecordBindingError(string message, string? source = null)
+    {
+        lock (_lock)
+        {
+            while (_entries.Count >= _maxCapacity)
+            {
+                _entries.Dequeue();
+            }
+
+            _entries.Enqueue(new BindingDiagnosticEntry(DateTime.UtcNow, message ?? string.Empty, source));
+        }
+    }
+
+    public IReadOnlyList<BindingDiagnosticEntry> GetRecentErrors(int maxCount = 50)
+    {
+        if (maxCount <= 0)
+        {
+            return Array.Empty<BindingDiagnosticEntry>();
+        }
+
+        lock (_lock)
+        {
+            if (_entries.Count == 0)
+            {
+                return Array.Empty<BindingDiagnosticEntry>();
+            }
+
+            int count = Math.Min(maxCount, _entries.Count);
+            int skip = _entries.Count - count;
+            return _entries.Skip(skip).Take(count).ToList().AsReadOnly();
+        }
+    }
+
+    public void Clear()
+    {
+        lock (_lock)
+        {
+            _entries.Clear();
+        }
+    }
+
+    public string ExportLogSummary()
+    {
+        lock (_lock)
+        {
+            if (_entries.Count == 0)
+            {
+                return "No binding errors recorded.";
+            }
+
+            var sb = new StringBuilder();
+            sb.AppendLine($"=== UI Diagnostic Summary ({_entries.Count} error(s)) ===");
+            foreach (var entry in _entries)
+            {
+                var sourceInfo = string.IsNullOrWhiteSpace(entry.Source) ? string.Empty : $" [{entry.Source}]";
+                sb.AppendLine($"[{entry.Timestamp:yyyy-MM-dd HH:mm:ss.fff}]{sourceInfo}: {entry.Message}");
+            }
+
+            return sb.ToString().TrimEnd();
+        }
+    }
+}

LocalLLMServerManager.Shared/Services/UiDiagnosticTraceListener.cs

@@ -0,0 +1,47 @@
+using System;
+using System.Diagnostics;
+
+namespace LocalLLMServerManager.Shared.Services;
+
+/// <summary>
+/// TraceListener that intercepts Avalonia UI binding diagnostic and warning messages
+/// and records them into an IUiDiagnosticLogger instance.
+/// </summary>
+public class UiDiagnosticTraceListener : TraceListener
+{
+    private readonly IUiDiagnosticLogger _logger;
+
+    public UiDiagnosticTraceListener(IUiDiagnosticLogger logger)
+        : base("UiDiagnosticTraceListener")
+    {
+        _logger = logger ?? throw new ArgumentNullException(nameof(logger));
+    }
+
+    public override void Write(string? message)
+    {
+        ProcessMessage(message);
+    }
+
+    public override void WriteLine(string? message)
+    {
+        ProcessMessage(message);
+    }
+
+    private void ProcessMessage(string? message)
+    {
+        if (string.IsNullOrWhiteSpace(message))
+        {
+            return;
+        }
+
+        // Intercept messages related to Avalonia data binding errors and warnings
+        if (message.Contains("[Binding]", StringComparison.OrdinalIgnoreCase) ||
+            message.Contains("Error in binding", StringComparison.OrdinalIgnoreCase) ||
+            message.Contains("Binding error", StringComparison.OrdinalIgnoreCase) ||
+            (message.Contains("Binding", StringComparison.OrdinalIgnoreCase) && 
+             (message.Contains("Error", StringComparison.OrdinalIgnoreCase) || message.Contains("Warning", StringComparison.OrdinalIgnoreCase))))
+        {
+            _logger.RecordBindingError(message.Trim(), "Avalonia.Binding");
+        }
+    }
+}

LocalLLMServerManager.Shared/Styles/DesignTokens.axaml

@@ -33,4 +33,15 @@
     <!-- Solid Base Background & Legacy Fallbacks -->
     <SolidColorBrush x:Key="GlassBackgroundBrush" Color="{StaticResource BgDarkColor}" />
     <SolidColorBrush x:Key="PrimaryGradientBrush" Color="{StaticResource PrimaryColor}" />
+
+    <!-- Vector Icon Geometries for Crisp Tab Navigation -->
+    <StreamGeometry x:Key="IconModels">M21,16.5C21,16.88 20.79,17.21 20.47,17.38L12.57,21.82C12.41,21.94 12.21,22 12,22C11.79,22 11.59,21.94 11.43,21.82L3.53,17.38C3.21,17.21 3,16.88 3,16.5V7.5C3,7.12 3.21,6.79 3.53,6.62L11.43,2.18C11.59,2.06 11.79,2 12,2C12.21,2 12.41,2.06 12.57,2.18L20.47,6.62C20.79,6.79 21,7.12 21,7.5V16.5M12,4.15L6.04,7.5L12,10.85L17.96,7.5L12,4.15M5,15.91L11,19.29V12.58L5,9.21V15.91M19,15.91V9.21L13,12.58V19.29L19,15.91Z</StreamGeometry>
+    <StreamGeometry x:Key="IconWorkflows">M13 2L3 14h6l-2 8 10-12h-6l2-8z</StreamGeometry>
+    <StreamGeometry x:Key="IconCanIRunIt">M6 2v2H4a2 2 0 0 0-2 2v2h2v2H2v2h2v2H2v2a2 2 0 0 0 2 2h2v2h2v-2h2v2h2v-2h2v2h2a2 2 0 0 0 2-2v-2h2v-2h-2v-2h2v-2h-2V6a2 2 0 0 0-2-2h-2V2h-2v2h-2V2h-2v2H8V2H6zm0 4h12v12H6V6zm2 2v8h8V8H8z</StreamGeometry>
+    <StreamGeometry x:Key="IconAiAssist">M12 2a2 2 0 0 1 2 2v1h3a3 3 0 0 1 3 3v8a3 3 0 0 1-3 3H7a3 3 0 0 1-3-3V8a3 3 0 0 1 3-3h3V4a2 2 0 0 1 2-2zm-4 8a1.5 1.5 0 1 0 0 3 1.5 1.5 0 0 0 0-3zm8 0a1.5 1.5 0 1 0 0 3 1.5 1.5 0 0 0 0-3zm-6 5a1 1 0 0 0 0 2h4a1 1 0 1 0 0-2H10z</StreamGeometry>
+    <StreamGeometry x:Key="IconDocumentation">M18 2H6c-1.1 0-2 .9-2 2v16c0 1.1.9 2 2 2h12c1.1 0 2-.9 2-2V4c0-1.1-.9-2-2-2zM6 4h5v8l-2.5-1.5L6 12V4zm12 16H6v-2h12v2zm0-4H6v-2h12v2zm0-4h-5V4h5v8z</StreamGeometry>
+    <StreamGeometry x:Key="IconSettings">M19.14 12.94c.04-.3.06-.61.06-.94 0-.32-.02-.64-.07-.94l2.03-1.58a.49.49 0 0 0 .12-.61l-1.92-3.32a.49.49 0 0 0-.59-.22l-2.39.96c-.5-.38-1.03-.7-1.62-.94l-.36-2.54A.48.48 0 0 0 14 2h-4a.48.48 0 0 0-.48.41l-.36 2.54c-.59.24-1.13.57-1.62.94l-2.39-.96a.49.49 0 0 0-.59.22L2.64 8.47a.49.49 0 0 0 .12.61l2.03 1.58c-.05.3-.07.62-.07.94s.02.64.07.94l-2.03 1.58a.49.49 0 0 0-.12.61l1.92 3.32c.12.22.37.29.59.22l2.39-.96c.5.38 1.03.7 1.62.94l.36 2.54c.05.24.24.41.48.41h4c.24 0 .44-.17.48-.41l.36-2.54c.59-.24 1.13-.56 1.62-.94l2.39.96c.22.08.47 0 .59-.22l1.92-3.32a.49.49 0 0 0-.12-.61l-2.03-1.58zM12 15.5a3.5 3.5 0 1 1 0-7 3.5 3.5 0 0 1 0 7z</StreamGeometry>
+    <StreamGeometry x:Key="IconDownloaded">M19 9h-4V3H9v6H5l7 7 7-7zM5 18v2h14v-2H5z</StreamGeometry>
+    <StreamGeometry x:Key="IconHub">M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm-1 17.93c-3.95-.49-7-3.85-7-7.93 0-.62.08-1.21.21-1.79L9 15v1c0 1.1.9 2 2 2v1.93zm6.9-2.54c-.26-.81-1-1.39-1.9-1.39h-1v-3c0-.55-.45-1-1-1H8v-2h2c.55 0 1-.45 1-1V7h2c1.1 0 2-.9 2-2v-.41c2.93 1.19 5 4.06 5 7.41 0 2.08-.8 3.97-2.1 5.39z</StreamGeometry>
+    <StreamGeometry x:Key="IconCivitai">M12 2C6.49 2 2 6.49 2 12s4.49 10 10 10a2.5 2.5 0 0 0 2.5-2.5c0-.61-.23-1.2-.64-1.67-.4-.46-.61-1.04-.61-1.63 0-1.38 1.12-2.5 2.5-2.5H17c2.76 0 5-2.24 5-5 0-4.74-4.48-8.7-10-8.7zm-5.5 9a1.5 1.5 0 1 1 0-3 1.5 1.5 0 0 1 0 3zm3-4a1.5 1.5 0 1 1 0-3 1.5 1.5 0 0 1 0 3zm5 0a1.5 1.5 0 1 1 0-3 1.5 1.5 0 0 1 0 3zm3 4a1.5 1.5 0 1 1 0-3 1.5 1.5 0 0 1 0 3z</StreamGeometry>
 </ResourceDictionary>

LocalLLMServerManager.Shared/Styles/MatteTheme.axaml

@@ -5,6 +5,8 @@
             <ResourceDictionary.MergedDictionaries>
                 <ResourceInclude Source="avares://LocalLLMServerManager.Shared/Styles/DesignTokens.axaml" />
             </ResourceDictionary.MergedDictionaries>
+            <SolidColorBrush x:Key="SurfaceHoverBrush" Color="#21262d" />
+            <SolidColorBrush x:Key="PrimaryAccentBrush" Color="#4f46e5" />
         </ResourceDictionary>
     </Styles.Resources>
 
@@ -115,8 +117,11 @@
                                 Margin="0,0,0,16"
                                 Padding="4"
                                 HorizontalAlignment="Left">
-                            <ItemsPresenter Name="PART_ItemsPresenter"
-                                            ItemsPanel="{TemplateBinding ItemsPanel}" />
+                            <StackPanel Orientation="Horizontal" Spacing="0">
+                                <ItemsPresenter Name="PART_ItemsPresenter"
+                                                ItemsPanel="{TemplateBinding ItemsPanel}" />
+                                <ContentPresenter Content="{TemplateBinding Tag}" />
+                            </StackPanel>
                         </Border>
                         <ContentPresenter Name="PART_SelectedContentHost"
                                           Margin="{TemplateBinding Padding}"
@@ -157,4 +162,56 @@
         <Setter Property="BorderThickness" Value="1" />
         <Setter Property="Foreground" Value="{StaticResource TextMainBrush}" />
     </Style>
+
+    <!-- Navigation pop-out action buttons styled seamlessly inside segmented tab bar -->
+    <Style Selector="Button.nav-tab-btn">
+        <Setter Property="Background" Value="Transparent" />
+        <Setter Property="Foreground" Value="{StaticResource TextMutedBrush}" />
+        <Setter Property="BorderThickness" Value="0" />
+        <Setter Property="CornerRadius" Value="6" />
+        <Setter Property="Padding" Value="14,8" />
+        <Setter Property="Margin" Value="2,0" />
+        <Setter Property="MinHeight" Value="34" />
+        <Setter Property="FontWeight" Value="SemiBold" />
+        <Setter Property="FontSize" Value="13" />
+        <Setter Property="Cursor" Value="Hand" />
+        <Setter Property="VerticalAlignment" Value="Center" />
+    </Style>
+    <Style Selector="Button.nav-tab-btn /template/ ContentPresenter#PART_ContentPresenter">
+        <Setter Property="CornerRadius" Value="6" />
+    </Style>
+    <Style Selector="Button.nav-tab-btn:pointerover /template/ ContentPresenter#PART_ContentPresenter">
+        <Setter Property="Background" Value="{StaticResource BgCardBrush}" />
+        <Setter Property="Foreground" Value="{StaticResource TextMainBrush}" />
+    </Style>
+    <Style Selector="Button.nav-tab-btn:pressed /template/ ContentPresenter#PART_ContentPresenter">
+        <Setter Property="Background" Value="{StaticResource BgSurfaceBrush}" />
+        <Setter Property="Opacity" Value="0.85" />
+    </Style>
+
+    <!-- Magnet Snap Button for Companion Windows -->
+    <Style Selector="Button.magnet-snap-btn">
+        <Setter Property="Background" Value="Transparent" />
+        <Setter Property="BorderBrush" Value="{StaticResource GlassBorderBrush}" />
+        <Setter Property="BorderThickness" Value="1" />
+        <Setter Property="CornerRadius" Value="6" />
+        <Setter Property="Padding" Value="8,4" />
+        <Setter Property="Cursor" Value="Hand" />
+    </Style>
+    <Style Selector="Button.magnet-snap-btn:pointerover">
+        <Setter Property="Background" Value="{StaticResource SurfaceHoverBrush}" />
+        <Setter Property="BorderBrush" Value="{StaticResource PrimaryAccentBrush}" />
+    </Style>
+    <Style Selector="Button.magnet-snap-btn:pointerover /template/ ContentPresenter#PART_ContentPresenter">
+        <Setter Property="Background" Value="{StaticResource SurfaceHoverBrush}" />
+        <Setter Property="BorderBrush" Value="{StaticResource PrimaryAccentBrush}" />
+    </Style>
+    <Style Selector="Button.magnet-snap-btn.snapped">
+        <Setter Property="Background" Value="#1a4f46e5" />
+        <Setter Property="BorderBrush" Value="#4f46e5" />
+    </Style>
+    <Style Selector="Button.magnet-snap-btn.snapped /template/ ContentPresenter#PART_ContentPresenter">
+        <Setter Property="Background" Value="#1a4f46e5" />
+        <Setter Property="BorderBrush" Value="#4f46e5" />
+    </Style>
 </Styles>