README.md

@@ -36,3 +36,13 @@ Run test suite:
 ```bash
 dotnet test --no-restore
 ```
+
+## 🗄️ Database Migrations
+
+Automatic database migrations at startup (`MigrateAsync()`) have been disabled to ensure compatibility with Native AOT compilation and prevent locking issues in multi-instance environments.
+
+To apply database migrations locally, run the EF Core migration command from the solution root:
+
+```bash
+dotnet ef database update --project src/NexusReader.Infrastructure --startup-project src/NexusReader.Web
+```

src/NexusReader.UI.Shared/Components/Molecules/IntelligenceToolbar.razor

@@ -61,7 +61,7 @@
 
     private Task HandleUpdate() => InvokeAsync(StateHasChanged);
 
-    private async Task HandleThemeChangedAsync() => await InvokeAsync(StateHasChanged);
+    private Task HandleThemeChangedAsync() => InvokeAsync(StateHasChanged);
 
     public void Dispose()
     {

src/NexusReader.UI.Shared/Components/Molecules/IntelligenceToolbar.razor.css

@@ -82,41 +82,39 @@
 
 /* Light mode overrides */
 .theme-light .intelligence-toolbar {
-    background: #ffffff;
+    background: #f5f5f4;
     border-right: 1px solid rgba(0, 0, 0, 0.08);
-    box-shadow: inset -1px 0 0 rgba(0,0,0,0.02);
+    box-shadow: inset -2px 0 10px rgba(0, 0, 0, 0.02);
 }
 
 .theme-light .toolbar-item {
-    color: #71717a;
+    color: #78716c;
 }
 
 .theme-light .toolbar-item:hover {
     color: #10b981;
     background: rgba(16, 185, 129, 0.05);
-    box-shadow: 0 0 15px rgba(16, 185, 129, 0.15);
-    filter: drop-shadow(0 0 5px rgba(16, 185, 129, 0.2));
+    box-shadow: 0 0 10px rgba(16, 185, 129, 0.1);
+    filter: none;
 }
 
 .theme-light .toolbar-item.active {
     color: #10b981;
     background: rgba(16, 185, 129, 0.08);
-    box-shadow: 0 0 20px rgba(16, 185, 129, 0.25);
-    filter: drop-shadow(0 0 8px rgba(16, 185, 129, 0.3));
+    box-shadow: 0 0 15px rgba(16, 185, 129, 0.15);
+    filter: none;
 }
 
 .theme-light .toolbar-item.active::after {
     background: #10b981;
-    box-shadow: 0 0 8px rgba(16, 185, 129, 0.5);
+    box-shadow: none;
 }
 
 .theme-light .toolbar-item.focus-active {
     color: #10b981;
-    filter: drop-shadow(0 0 8px rgba(16, 185, 129, 0.3));
+    filter: none;
 }
 
-
-
 .theme-light .toolbar-separator {
     background: rgba(0, 0, 0, 0.08);
 }

src/NexusReader.UI.Shared/Components/Organisms/ReaderCanvas.razor

@@ -99,6 +99,7 @@
     private bool _isMobile = false;
     private DotNetObjectReference<ReaderCanvas>? _selfReference;
     private IJSObjectReference? _viewportModule;
+    private IJSObjectReference? _selectionModule;
 
     protected override async Task OnInitializedAsync()
     {
@@ -201,10 +202,13 @@
     {
         try
         {
-            var module = await JS.InvokeAsync<IJSObjectReference>("import", "./_content/NexusReader.UI.Shared/js/selectionHandler.js");
+            if (_selectionModule == null)
+            {
+                _selectionModule = await JS.InvokeAsync<IJSObjectReference>("import", "./_content/NexusReader.UI.Shared/js/selectionHandler.js");
+            }
             if (_selfReference != null)
             {
-                await module.InvokeVoidAsync("initSelectionListener", _selfReference, _containerRef);
+                await _selectionModule.InvokeVoidAsync("initSelectionListener", _selfReference, _containerRef);
             }
         }
         catch (Exception ex)
@@ -440,6 +444,19 @@
         InteractionService.OnTextSelected -= HandleTextSelected;
         SyncService.OnProgressReceived -= HandleSyncProgressReceived;
 
+        try
+        {
+            if (_selectionModule != null)
+            {
+                await _selectionModule.InvokeVoidAsync("destroySelectionListener");
+                await _selectionModule.DisposeAsync();
+            }
+        }
+        catch (Exception ex)
+        {
+            Logger.LogDebug(ex, "Failed to destroy JS selection listener.");
+        }
+
         try
         {
             if (_viewportModule != null)

src/NexusReader.UI.Shared/Services/KnowledgeCoordinator.cs

@@ -233,6 +233,10 @@ public sealed partial class KnowledgeCoordinator : IDisposable, IAsyncDisposable
             {
                 SelectionSummary = result.Value.Summary;
             }
+            else
+            {
+                _logger.LogWarning("[KnowledgeCoordinator] Selection summary request failed: {Errors}", string.Join(", ", result.Errors.Select(e => e.Message)));
+            }
         }
         finally
         {

src/NexusReader.UI.Shared/wwwroot/app.css

@@ -176,52 +176,6 @@
     
     --nexus-accent: #10b981;
 }
-
-/* Scoped Component overrides for Light Mode (Bypassing Blazor CSS isolation) */
-.theme-light .intelligence-toolbar {
-    background: #f5f5f4 !important;
-    border-right: 1px solid rgba(0, 0, 0, 0.08) !important;
-    box-shadow: inset -2px 0 10px rgba(0, 0, 0, 0.02) !important;
-}
-
-.theme-light .intelligence-toolbar .toolbar-item {
-    color: #78716c !important;
-}
-
-.theme-light .intelligence-toolbar .toolbar-item:hover {
-    color: #10b981 !important;
-    background: rgba(16, 185, 129, 0.05) !important;
-    box-shadow: 0 0 10px rgba(16, 185, 129, 0.1) !important;
-    filter: none !important;
-}
-
-.theme-light .intelligence-toolbar .toolbar-item.active {
-    color: #10b981 !important;
-    background: rgba(16, 185, 129, 0.08) !important;
-    box-shadow: 0 0 15px rgba(16, 185, 129, 0.15) !important;
-    filter: none !important;
-}
-
-.theme-light .intelligence-toolbar .toolbar-item.active::after {
-    background: #10b981 !important;
-    box-shadow: none !important;
-}
-
-.theme-light .intelligence-toolbar .toolbar-item.focus-active {
-    color: #10b981 !important;
-    filter: none !important;
-}
-
-.theme-light .intelligence-toolbar .toolbar-item.logout-item {
-    border-top: 1px solid rgba(0, 0, 0, 0.08) !important;
-    color: #a8a29e !important;
-}
-
-.theme-light .intelligence-toolbar .toolbar-item.logout-item:hover {
-    color: #ef4444 !important;
-    filter: none !important;
-}
-
 .theme-light .knowledge-graph-container svg {
     background: radial-gradient(circle, #ffffff 0%, #e8e4da 100%) !important;
 }
@@ -350,14 +304,14 @@ body {
 
 
 /* Platform Specific Tweaks */
-.platform-mobile .nexus-button {
+.platform-mobile .nexus-btn {
     min-height: var(--touch-target-size);
     min-width: var(--touch-target-size);
     font-size: 1.1rem;
     padding: 12px 24px;
 }
 
-.platform-desktop .nexus-button {
+.platform-desktop .nexus-btn {
     min-height: 36px;
     font-size: 0.9rem;
     padding: 8px 16px;

src/NexusReader.UI.Shared/wwwroot/js/selectionHandler.js

@@ -54,11 +54,17 @@ export function positionToolbar() {
         below: below
     };
 }
+let currentHandleSelection = null;
+let currentMouseUpHandler = null;
+let currentContainer = null;
 
 export function initSelectionListener(dotNetHelper, container) {
     if (!container) return;
 
     console.log("[SelectionHandler] Initializing...");
+    
+    // Clean up any existing listeners first
+    destroySelectionListener();
 
     const handleSelection = () => {
         const selection = window.getSelection();
@@ -104,9 +110,26 @@ export function initSelectionListener(dotNetHelper, container) {
         }
     };
 
-    // Use multiple triggers for maximum reliability
-    document.addEventListener('selectionchange', handleSelection);
-    container.addEventListener('mouseup', () => setTimeout(handleSelection, 10));
+    const mouseUpHandler = () => setTimeout(handleSelection, 10);
+
+    currentHandleSelection = handleSelection;
+    currentMouseUpHandler = mouseUpHandler;
+    currentContainer = container;
+
+    document.addEventListener('selectionchange', currentHandleSelection);
+    currentContainer.addEventListener('mouseup', currentMouseUpHandler);
+}
+
+export function destroySelectionListener() {
+    if (currentHandleSelection) {
+        document.removeEventListener('selectionchange', currentHandleSelection);
+        currentHandleSelection = null;
+    }
+    if (currentMouseUpHandler && currentContainer) {
+        currentContainer.removeEventListener('mouseup', currentMouseUpHandler);
+        currentMouseUpHandler = null;
+        currentContainer = null;
+    }
 }
 
 export function getSelectionText() {