Upload app.py

app.py

@@ -229,8 +229,10 @@ def extract_audio_text_v2(slide: dict, slide_index: int, history: list) -> str:
         history_index = (slide_index - 1) // 2
         event = history[history_index]
         year = str(event.get("year", ""))
+        # 既に「年」が含まれている場合は除去（重複防止）
+        year_clean = year.replace("年", "")
         mnemonic = clean_mnemonic(str(event.get("mnemonic", "")))
-        return f"{year}年、{mnemonic}。{year}年、{mnemonic}。"
+        return f"{year_clean}年、{mnemonic}。{year_clean}年、{mnemonic}。"
 
     elif slide_type == "imageText_with_text":
         # slide_index 2, 4, 6, 8, 10, 12 → history[0, 1, 2, 3, 4, 5]
@@ -283,14 +285,14 @@ def generate_audio_with_gemini(audio_text: str, gemini_token: str) -> bytes:
     """
     import base64
 
-    url = f"https://generativelanguage.googleapis.com/v1beta/models/gemini-2.5-flash-preview-tts:generateContent?key={gemini_token}"
+    url = f"https://generativelanguage.googleapis.com/v1beta/models/gemini-2.5-pro-preview-tts:generateContent?key={gemini_token}"
 
     headers = {
         "Content-Type": "application/json"
     }
 
-    # プロンプトベース制御（Gemini TTSの標準的な使い方）
-    prompt_text = f"Say clearly in Japanese: {audio_text}"
+    # プロンプトベース制御（歴史用語の正確な読み上げを重視）
+    prompt_text = f"Pronounce this Japanese text correctly, paying careful attention to historical vocabulary and proper kanji readings: {audio_text}"
 
     payload = {
         "contents": [