diff --git a/backend/DramaLing.Api/Extensions/ServiceCollectionExtensions.cs b/backend/DramaLing.Api/Extensions/ServiceCollectionExtensions.cs
index 6e8cd2f..7fa62b5 100644
--- a/backend/DramaLing.Api/Extensions/ServiceCollectionExtensions.cs
+++ b/backend/DramaLing.Api/Extensions/ServiceCollectionExtensions.cs
@@ -89,7 +89,7 @@ public static class ServiceCollectionExtensions
         });
 
         // 主要快取服務
-        services.AddScoped<ICacheService, RefactoredHybridCacheService>();
+        services.AddScoped<ICacheService, HybridCacheService>();
 
         return services;
     }
diff --git a/backend/DramaLing.Api/README.md b/backend/DramaLing.Api/README.md
index d056bd7..f51e6bb 100644
--- a/backend/DramaLing.Api/README.md
+++ b/backend/DramaLing.Api/README.md
@@ -138,7 +138,7 @@ DramaLing.Api/
   - ImageSaveManager → 圖片儲存管理
 
 ### 快取服務群組
-- **RefactoredHybridCacheService** (Facade) → 混合快取服務
+- **HybridCacheService** (Facade) → 混合快取服務
   - MemoryCacheProvider → 記憶體快取
   - DistributedCacheProvider → 分散式快取
   - CacheStrategyManager → 快取策略管理
diff --git a/backend/DramaLing.Api/Services/AI/Generation/IGeminiDescriptionGenerator.cs b/backend/DramaLing.Api/Services/AI/Generation/IGeminiDescriptionGenerator.cs
deleted file mode 100644
index 7fe2077..0000000
--- a/backend/DramaLing.Api/Services/AI/Generation/IGeminiDescriptionGenerator.cs
+++ /dev/null
@@ -1,9 +0,0 @@
-using DramaLing.Api.Models.DTOs;
-using DramaLing.Api.Models.Entities;
-
-namespace DramaLing.Api.Services.AI.Generation;
-
-public interface IGeminiDescriptionGenerator
-{
-    Task<string> GenerateImageDescriptionAsync(Flashcard flashcard, GenerationOptionsDto options);
-}
\ No newline at end of file
diff --git a/backend/DramaLing.Api/Services/Infrastructure/Caching/RefactoredHybridCacheService.cs b/backend/DramaLing.Api/Services/Infrastructure/Caching/HybridCacheService.cs
similarity index 92%
rename from backend/DramaLing.Api/Services/Infrastructure/Caching/RefactoredHybridCacheService.cs
rename to backend/DramaLing.Api/Services/Infrastructure/Caching/HybridCacheService.cs
index 36734b5..77f8f37 100644
--- a/backend/DramaLing.Api/Services/Infrastructure/Caching/RefactoredHybridCacheService.cs
+++ b/backend/DramaLing.Api/Services/Infrastructure/Caching/HybridCacheService.cs
@@ -3,23 +3,23 @@ using DramaLing.Api.Services.Infrastructure.Caching;
 namespace DramaLing.Api.Services.Caching;
 
 /// <summary>
-/// 重構後的混合快取服務，使用組合模式
+/// 混合快取服務，使用組合模式結合記憶體和分散式快取
 /// </summary>
-public class RefactoredHybridCacheService : ICacheService
+public class HybridCacheService : ICacheService
 {
     private readonly ICacheProvider _memoryProvider;
     private readonly ICacheProvider? _distributedProvider;
     private readonly IDatabaseCacheManager _databaseCacheManager;
     private readonly ICacheStrategyManager _strategyManager;
-    private readonly ILogger<RefactoredHybridCacheService> _logger;
+    private readonly ILogger<HybridCacheService> _logger;
     private readonly CacheStats _stats;
 
-    public RefactoredHybridCacheService(
+    public HybridCacheService(
         ICacheProvider memoryProvider,
         ICacheProvider? distributedProvider,
         IDatabaseCacheManager databaseCacheManager,
         ICacheStrategyManager strategyManager,
-        ILogger<RefactoredHybridCacheService> logger)
+        ILogger<HybridCacheService> logger)
     {
         _memoryProvider = memoryProvider ?? throw new ArgumentNullException(nameof(memoryProvider));
         _distributedProvider = distributedProvider;
@@ -28,7 +28,7 @@ public class RefactoredHybridCacheService : ICacheService
         _logger = logger ?? throw new ArgumentNullException(nameof(logger));
         _stats = new CacheStats { LastUpdated = DateTime.UtcNow };
 
-        _logger.LogInformation("RefactoredHybridCacheService initialized with {MemoryProvider} and {DistributedProvider}",
+        _logger.LogInformation("HybridCacheService initialized with {MemoryProvider} and {DistributedProvider}",
             _memoryProvider.ProviderName, _distributedProvider?.ProviderName ?? "No Distributed Cache");
     }
 
diff --git a/backend/DramaLing.Api/Services/README.md b/backend/DramaLing.Api/Services/README.md
index aea23b9..07c82c7 100644
--- a/backend/DramaLing.Api/Services/README.md
+++ b/backend/DramaLing.Api/Services/README.md
@@ -9,27 +9,32 @@ Services 層實作業務邏輯，採用領域驅動設計 (DDD) 原則，按功
 Services/
 ├── README.md                    # 本文檔 - Services 層總覽
 ├── AI/                         # AI 相關服務
+│   ├── Analysis/              # AI 分析服務
 │   ├── Gemini/                # Gemini AI 服務
 │   └── Generation/            # 圖片生成服務
 ├── Core/                      # 核心業務服務
 │   └── Auth/                  # 認證服務
 ├── Infrastructure/            # 基礎設施服務
 │   ├── Caching/              # 快取服務
-│   ├── Messaging/            # 訊息服務
 │   └── Monitoring/           # 監控服務
 ├── Media/                     # 多媒體服務
 │   ├── Audio/                # 音訊處理服務
-│   └── Image/                # 圖片處理服務
-├── Storage/                   # 儲存服務
-├── Vocabulary/                # 詞彙相關服務
-│   └── Options/              # 選項詞彙服務
-└── Analysis/                  # 分析服務
+│   ├── Image/                # 圖片處理服務
+│   └── Storage/              # 多媒體儲存服務
+└── Vocabulary/                # 詞彙相關服務
+    └── Options/              # 選項詞彙服務
 ```
 
 ---
 
 ## 🤖 AI 服務 (Services/AI/)
 
+### AI 分析服務組 (AI/Analysis/)
+| 服務名稱 | 功能說明 | 檔案位置 |
+|---------|---------|----------|
+| `AnalysisService` | 綜合分析服務 (帶快取) | `AnalysisService.cs` |
+| `IGeminiAnalyzer` | Gemini 分析器介面 | `IGeminiAnalyzer.cs` |
+
 ### Gemini 服務組 (AI/Gemini/)
 **主要 Facade 服務**: `GeminiService` - 統一的 Gemini AI 功能入口
 
@@ -75,7 +80,7 @@ var description = await _geminiService.GenerateImageDescriptionAsync(flashcard,
 ## 🏗️ 基礎設施服務 (Services/Infrastructure/)
 
 ### 快取服務組 (Infrastructure/Caching/)
-**主要 Facade 服務**: `RefactoredHybridCacheService` - 混合快取服務
+**主要 Facade 服務**: `HybridCacheService` - 混合快取服務
 
 | 服務名稱 | 功能說明 | 檔案位置 |
 |---------|---------|----------|
@@ -91,6 +96,12 @@ var description = await _geminiService.GenerateImageDescriptionAsync(flashcard,
 - **序列化支援**: JSON 格式序列化
 - **資料庫整合**: 支援資料庫層快取
 
+### 監控服務組 (Infrastructure/Monitoring/)
+| 服務名稱 | 功能說明 | 檔案位置 |
+|---------|---------|----------|
+| `UsageTrackingService` | 使用追蹤服務 | `UsageTrackingService.cs` |
+| `OptionsVocabularyMetrics` | 選項詞彙指標服務 | `OptionsVocabularyMetrics.cs` |
+
 ---
 
 ## 📁 媒體服務 (Services/Media/)
@@ -106,9 +117,7 @@ var description = await _geminiService.GenerateImageDescriptionAsync(flashcard,
 |---------|---------|----------|
 | `ImageProcessingService` | 圖片處理服務 | `ImageProcessingService.cs` |
 
----
-
-## 💾 儲存服務 (Services/Storage/)
+### 儲存服務 (Media/Storage/)
 | 服務名稱 | 功能說明 | 檔案位置 |
 |---------|---------|----------|
 | `LocalImageStorageService` | 本地圖片儲存服務 | `LocalImageStorageService.cs` |
@@ -124,14 +133,6 @@ var description = await _geminiService.GenerateImageDescriptionAsync(flashcard,
 
 ---
 
-## 📊 分析服務 (Services/)
-| 服務名稱 | 功能說明 | 檔案位置 |
-|---------|---------|----------|
-| `AnalysisService` | 綜合分析服務 (帶快取) | `AnalysisService.cs` |
-| `UsageTrackingService` | 使用追蹤服務 | `UsageTrackingService.cs` |
-
----
-
 ## 🌐 外部服務整合
 
 ### Replicate 服務
@@ -201,7 +202,8 @@ services.AddRepositoryServices();
 
 ---
 
-**版本**: 1.0
+**版本**: 1.1
 **最後更新**: 2025-09-30
 **維護者**: DramaLing 開發團隊
-**重構日期**: 2025-09-29 ~ 2025-09-30
\ No newline at end of file
+**重構日期**: 2025-09-29 ~ 2025-09-30
+**索引完善**: 2025-09-30 (階段三完成)
\ No newline at end of file