feat: implement structured logging in KnowledgeCoordinator [MN-01]

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

@@ -3,6 +3,7 @@ using NexusReader.Application.Queries.Graph;
 using NexusReader.Application.Queries.Quiz;
 using NexusReader.UI.Shared.Services;
 using NexusReader.Application.DTOs.AI;
+using Microsoft.Extensions.Logging;
 
 namespace NexusReader.UI.Shared.Services;
 
@@ -13,6 +14,7 @@ public sealed class KnowledgeCoordinator : IDisposable
     private readonly IQuizStateService _quizService;
     private readonly IPlatformService _platformService;
     private readonly IReaderInteractionService _interactionService;
+    private readonly ILogger<KnowledgeCoordinator> _logger;
     
     public event Action<GraphDataDto>? OnGraphUpdated;
 
@@ -21,13 +23,15 @@ public sealed class KnowledgeCoordinator : IDisposable
         IKnowledgeGraphService graphService,
         IQuizStateService quizService,
         IPlatformService platformService,
-        IReaderInteractionService interactionService)
+        IReaderInteractionService interactionService,
+        ILogger<KnowledgeCoordinator> logger)
     {
         _knowledgeService = knowledgeService;
         _graphService = graphService;
         _quizService = quizService;
         _platformService = platformService;
         _interactionService = interactionService;
+        _logger = logger;
 
         _interactionService.OnNodeSelected += HandleNodeSelected;
     }
@@ -42,7 +46,7 @@ public sealed class KnowledgeCoordinator : IDisposable
     {
         if (string.IsNullOrWhiteSpace(fullContent)) return;
 
-        Console.WriteLine("[KnowledgeCoordinator] Generating full page graph...");
+        _logger.LogInformation("[KnowledgeCoordinator] Generating full page graph for tenant: {TenantId}", tenantId);
         
         _graphService.Clear();
         _graphService.SetLoading(true);
@@ -63,7 +67,7 @@ public sealed class KnowledgeCoordinator : IDisposable
         }
         catch (Exception ex)
         {
-            Console.WriteLine($"[KnowledgeCoordinator] Error generating graph: {ex.Message}");
+            _logger.LogError(ex, "[KnowledgeCoordinator] Error generating graph for tenant: {TenantId}. Message: {ErrorMessage}", tenantId, ex.Message);
         }
     }
 
@@ -76,6 +80,7 @@ public sealed class KnowledgeCoordinator : IDisposable
     public async Task<KnowledgePacket?> RequestSummaryAndQuizAsync(string content, string tenantId = "global")
     {
         _quizService.SetHydrating(true);
+        _logger.LogInformation("[KnowledgeCoordinator] Requesting summary and quiz for tenant: {TenantId}", tenantId);
         try
         {
             var result = await _knowledgeService.GetSummaryAndQuizAsync(content, tenantId);
@@ -90,6 +95,12 @@ public sealed class KnowledgeCoordinator : IDisposable
                 await _platformService.VibrateSuccessAsync();
                 return packet;
             }
+
+            _logger.LogWarning("[KnowledgeCoordinator] Failed to get summary and quiz for tenant: {TenantId}", tenantId);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "[KnowledgeCoordinator] Error requesting summary and quiz for tenant: {TenantId}. Message: {ErrorMessage}", tenantId, ex.Message);
         }
         finally
         {