diff --git a/backend/DramaLing.Api/Controllers/AIController.cs b/backend/DramaLing.Api/Controllers/AIController.cs
index be40b30..61c09ec 100644
--- a/backend/DramaLing.Api/Controllers/AIController.cs
+++ b/backend/DramaLing.Api/Controllers/AIController.cs
@@ -36,87 +36,6 @@ public class AIController : ControllerBase
         _logger = logger;
     }
 
-    /// <summary>
-    /// AI 生成詞卡測試端點 (開發用，無需認證)
-    /// </summary>
-    [HttpPost("test/generate")]
-    [AllowAnonymous]
-    public async Task<ActionResult> TestGenerateCards([FromBody] GenerateCardsRequest request)
-    {
-        try
-        {
-            // 基本驗證
-            if (string.IsNullOrWhiteSpace(request.InputText))
-            {
-                return BadRequest(new { Success = false, Error = "Input text is required" });
-            }
-
-            if (request.InputText.Length > 5000)
-            {
-                return BadRequest(new { Success = false, Error = "Input text must be less than 5000 characters" });
-            }
-
-            if (!new[] { "vocabulary", "smart" }.Contains(request.ExtractionType))
-            {
-                return BadRequest(new { Success = false, Error = "Invalid extraction type" });
-            }
-
-            if (request.CardCount < 1 || request.CardCount > 20)
-            {
-                return BadRequest(new { Success = false, Error = "Card count must be between 1 and 20" });
-            }
-
-            // 測試模式：直接使用模擬資料
-            try
-            {
-                var generatedCards = await _geminiService.GenerateCardsAsync(
-                    request.InputText,
-                    request.ExtractionType,
-                    request.CardCount);
-
-                return Ok(new
-                {
-                    Success = true,
-                    Data = new
-                    {
-                        TaskId = Guid.NewGuid(),
-                        Status = "completed",
-                        GeneratedCards = generatedCards
-                    },
-                    Message = $"Successfully generated {generatedCards.Count} cards"
-                });
-            }
-            catch (InvalidOperationException ex) when (ex.Message.Contains("API key"))
-            {
-                _logger.LogWarning("Gemini API key not configured, using mock data");
-
-                // 返回模擬資料
-                var mockCards = GenerateMockCards(request.CardCount);
-                return Ok(new
-                {
-                    Success = true,
-                    Data = new
-                    {
-                        TaskId = Guid.NewGuid(),
-                        Status = "completed",
-                        GeneratedCards = mockCards
-                    },
-                    Message = $"Generated {mockCards.Count} mock cards (Test mode)"
-                });
-            }
-        }
-        catch (Exception ex)
-        {
-            _logger.LogError(ex, "Error in AI card generation test");
-            return StatusCode(500, new
-            {
-                Success = false,
-                Error = "Failed to generate cards",
-                Details = ex.Message,
-                Timestamp = DateTime.UtcNow
-            });
-        }
-    }
 
     /// <summary>
     /// AI 生成詞卡 (支援 /frontend/app/generate/page.tsx)
@@ -215,20 +134,12 @@ public class AIController : ControllerBase
             }
             catch (InvalidOperationException ex) when (ex.Message.Contains("API key"))
             {
-                _logger.LogWarning("Gemini API key not configured, using mock data");
-
-                // 返回模擬資料（開發階段）
-                var mockCards = GenerateMockCards(request.CardCount);
-                return Ok(new
+                _logger.LogError("Gemini API key not configured");
+                return StatusCode(500, new
                 {
-                    Success = true,
-                    Data = new
-                    {
-                        TaskId = Guid.NewGuid(),
-                        Status = "completed",
-                        GeneratedCards = mockCards
-                    },
-                    Message = $"Generated {mockCards.Count} mock cards (Gemini API not configured)"
+                    Success = false,
+                    Error = "AI service not configured",
+                    Timestamp = DateTime.UtcNow
                 });
             }
         }
@@ -244,99 +155,6 @@ public class AIController : ControllerBase
         }
     }
 
-    /// <summary>
-    /// 測試版保存生成的詞卡 (無需認證)
-    /// </summary>
-    [HttpPost("test/save")]
-    [AllowAnonymous]
-    public async Task<ActionResult> TestSaveCards([FromBody] TestSaveCardsRequest request)
-    {
-        try
-        {
-            // 基本驗證
-            if (request.SelectedCards == null || request.SelectedCards.Count == 0)
-            {
-                return BadRequest(new { Success = false, Error = "Selected cards are required" });
-            }
-
-            // 創建或使用預設卡組
-            var defaultCardSet = await _context.CardSets
-                .FirstOrDefaultAsync(cs => cs.IsDefault);
-
-            if (defaultCardSet == null)
-            {
-                // 創建預設卡組
-                defaultCardSet = new CardSet
-                {
-                    Id = Guid.NewGuid(),
-                    UserId = Guid.NewGuid(), // 測試用戶 ID
-                    Name = "AI 生成詞卡",
-                    Description = "通過 AI 智能生成的詞卡集合",
-                    Color = "#3B82F6",
-                    IsDefault = true,
-                    CreatedAt = DateTime.UtcNow,
-                    UpdatedAt = DateTime.UtcNow
-                };
-                _context.CardSets.Add(defaultCardSet);
-            }
-
-            // 將生成的詞卡轉換為資料庫實體
-            var flashcardsToSave = request.SelectedCards.Select(card => new Flashcard
-            {
-                Id = Guid.NewGuid(),
-                UserId = defaultCardSet.UserId,
-                CardSetId = defaultCardSet.Id,
-                Word = card.Word,
-                Translation = card.Translation,
-                Definition = card.Definition,
-                PartOfSpeech = card.PartOfSpeech,
-                Pronunciation = card.Pronunciation,
-                Example = card.Example,
-                ExampleTranslation = card.ExampleTranslation,
-                DifficultyLevel = card.DifficultyLevel,
-                CreatedAt = DateTime.UtcNow,
-                UpdatedAt = DateTime.UtcNow
-            }).ToList();
-
-            _context.Flashcards.AddRange(flashcardsToSave);
-
-            // 更新卡組計數
-            defaultCardSet.CardCount += flashcardsToSave.Count;
-            defaultCardSet.UpdatedAt = DateTime.UtcNow;
-
-            await _context.SaveChangesAsync();
-
-            return Ok(new
-            {
-                Success = true,
-                Data = new
-                {
-                    SavedCount = flashcardsToSave.Count,
-                    CardSetId = defaultCardSet.Id,
-                    CardSetName = defaultCardSet.Name,
-                    Cards = flashcardsToSave.Select(f => new
-                    {
-                        f.Id,
-                        f.Word,
-                        f.Translation,
-                        f.Definition
-                    })
-                },
-                Message = $"Successfully saved {flashcardsToSave.Count} cards to deck '{defaultCardSet.Name}'"
-            });
-        }
-        catch (Exception ex)
-        {
-            _logger.LogError(ex, "Error saving generated cards");
-            return StatusCode(500, new
-            {
-                Success = false,
-                Error = "Failed to save cards",
-                Details = ex.Message,
-                Timestamp = DateTime.UtcNow
-            });
-        }
-    }
 
     /// <summary>
     /// 保存生成的詞卡
@@ -1417,50 +1235,6 @@ public class AIController : ControllerBase
 
     #endregion
 
-    /// <summary>
-    /// 生成模擬資料 (開發階段使用)
-    /// </summary>
-    private List<GeneratedCard> GenerateMockCards(int count)
-    {
-        var mockCards = new List<GeneratedCard>
-        {
-            new() {
-                Word = "accomplish",
-                PartOfSpeech = "verb",
-                Pronunciation = "/əˈkʌmplɪʃ/",
-                Translation = "完成、達成",
-                Definition = "To finish something successfully or to achieve something",
-                Synonyms = new() { "achieve", "complete" },
-                Example = "She accomplished her goal of learning English.",
-                ExampleTranslation = "她達成了學習英語的目標。",
-                DifficultyLevel = "B1"
-            },
-            new() {
-                Word = "negotiate",
-                PartOfSpeech = "verb",
-                Pronunciation = "/nɪˈɡəʊʃieɪt/",
-                Translation = "協商、談判",
-                Definition = "To discuss something with someone in order to reach an agreement",
-                Synonyms = new() { "bargain", "discuss" },
-                Example = "We need to negotiate a better deal.",
-                ExampleTranslation = "我們需要協商一個更好的交易。",
-                DifficultyLevel = "B2"
-            },
-            new() {
-                Word = "perspective",
-                PartOfSpeech = "noun",
-                Pronunciation = "/pərˈspektɪv/",
-                Translation = "觀點、看法",
-                Definition = "A particular way of considering something",
-                Synonyms = new() { "viewpoint", "opinion" },
-                Example = "From my perspective, this is the best solution.",
-                ExampleTranslation = "從我的觀點來看，這是最好的解決方案。",
-                DifficultyLevel = "B2"
-            }
-        };
-
-        return mockCards.Take(Math.Min(count, mockCards.Count)).ToList();
-    }
 }
 
 // Request DTOs
@@ -1483,10 +1257,6 @@ public class ValidateCardRequest
     public Guid? ErrorReportId { get; set; }
 }
 
-public class TestSaveCardsRequest
-{
-    public List<GeneratedCard> SelectedCards { get; set; } = new();
-}
 
 // 新增的API請求/響應 DTOs
 public class AnalyzeSentenceRequest