feat: implement semantic search, knowledge unit extraction, and visualization components

src/NexusReader.Application/Abstractions/Persistence/IApplicationDbContext.cs

@@ -0,0 +1,15 @@
+using Microsoft.EntityFrameworkCore;
+using NexusReader.Domain.Entities;
+
+namespace NexusReader.Application.Abstractions.Persistence;
+
+public interface IApplicationDbContext
+{
+    DbSet<SemanticKnowledgeCache> SemanticKnowledgeCache { get; }
+    DbSet<KnowledgeUnit> KnowledgeUnits { get; }
+    DbSet<KnowledgeUnitLink> KnowledgeUnitLinks { get; }
+    DbSet<Ebook> Ebooks { get; }
+    DbSet<QuizResult> QuizResults { get; }
+    
+    Task<int> SaveChangesAsync(CancellationToken cancellationToken = default);
+}

src/NexusReader.Application/Abstractions/Services/IKnowledgeService.cs

@@ -7,6 +7,8 @@ public interface IKnowledgeService
 {
     Task<Result<KnowledgePacket>> GetKnowledgeAsync(string text, CancellationToken cancellationToken = default);
     Task<Result<KnowledgePacket>> GetGraphDataAsync(string text, CancellationToken cancellationToken = default);
+    Task<Result<KnowledgePacket>> GetKnowledgeMapAsync(string text, CancellationToken cancellationToken = default);
     Task<Result<KnowledgePacket>> GetSummaryAndQuizAsync(string text, CancellationToken cancellationToken = default);
+    Task<Result<List<RelevantContext>>> GetRelevantContextAsync(string query, string tenantId, CancellationToken cancellationToken = default);
     Task<Result> ClearCacheAsync(CancellationToken cancellationToken = default);
 }