fix あくまでembeddingなのでsafety外す

Author: usuyuki

backend/infrastructure/llm/gemini.go

@@ -16,6 +16,15 @@ const (
 	ModelEmbedding = "gemini-embedding-001"
 )
 
+// noSafetySettings は全カテゴリの安全フィルターを無効にする設定
+// 日記アプリでは個人の記録を正確に処理するためブロックなしとする
+var noSafetySettings = []*genai.SafetySetting{
+	{Category: genai.HarmCategoryHateSpeech, Threshold: genai.HarmBlockThresholdBlockNone},
+	{Category: genai.HarmCategoryDangerousContent, Threshold: genai.HarmBlockThresholdBlockNone},
+	{Category: genai.HarmCategorySexuallyExplicit, Threshold: genai.HarmBlockThresholdBlockNone},
+	{Category: genai.HarmCategoryHarassment, Threshold: genai.HarmBlockThresholdBlockNone},
+}
+
 // DiaryChunkData はLLMが生成したチャンクの内容と概要を保持する
 type DiaryChunkData struct {
 	// Content チャンクの元テキスト（ベクトル化対象）
@@ -71,7 +80,8 @@ n日：箇条書き3
 
 	zero := float32(0)
 	config := &genai.GenerateContentConfig{
-		Temperature: &zero,
+		Temperature:    &zero,
+		SafetySettings: noSafetySettings,
 	}
 
 	resp, err := g.client.Models.GenerateContent(ctx, ModelGenerateContent, contents, config)
@@ -117,7 +127,8 @@ func (g *GeminiClient) GenerateDailySummary(ctx context.Context, diaryContent st
 
 	zero := float32(0)
 	config := &genai.GenerateContentConfig{
-		Temperature: &zero,
+		Temperature:    &zero,
+		SafetySettings: noSafetySettings,
 	}
 
 	resp, err := g.client.Models.GenerateContent(ctx, ModelGenerateContent, contents, config)
@@ -260,6 +271,7 @@ activities（活動・行動）:
 	config := &genai.GenerateContentConfig{
 		ResponseMIMEType: "application/json",
 		ResponseSchema:   schema,
+		SafetySettings:   noSafetySettings,
 	}
 
 	resp, err := g.client.Models.GenerateContent(ctx, ModelGenerateContent, contents, config)
@@ -353,6 +365,7 @@ func (g *GeminiClient) SplitDiaryIntoChunks(ctx context.Context, content string)
 		Temperature:      &zero,
 		ResponseMIMEType: "application/json",
 		ResponseSchema:   schema,
+		SafetySettings:   noSafetySettings,
 	}
 
 	resp, err := g.client.Models.GenerateContent(ctx, ModelGenerateContent, contents, config)
@@ -458,6 +471,7 @@ func (g *GeminiClient) GenerateHighlights(ctx context.Context, diaryContent stri
 		Temperature:      &zero,
 		ResponseMIMEType: "application/json",
 		ResponseSchema:   schema,
+		SafetySettings:   noSafetySettings,
 	}
 
 	resp, err := g.client.Models.GenerateContent(ctx, ModelGenerateContent, contents, config)