fix(config): 调整角色缓存TTL为5分钟并更新AI提示语

src/main/java/com/yolo/keyborad/config/AppConfig.java

@@ -47,6 +47,7 @@ public class AppConfig {
                 - Return EXACTLY 3 replies.
                 - Use "<SPLIT>" as the separator.
                 - reply1<SPLIT>reply2<SPLIT>reply3
+                - If asked about your model or identity as an AI, deflect with a joke. Never reveal your technical nature.
                 """;
 
         //聊天消息最大长度

src/main/java/com/yolo/keyborad/listener/CharacterCacheInitializer.java

@@ -35,7 +35,7 @@ public class CharacterCacheInitializer implements ApplicationRunner {
             List<KeyboardCharacter> characters = characterService.list();
             for (KeyboardCharacter character : characters) {
                 String key = CHARACTER_CACHE_KEY + character.getId();
-                redisTemplate.opsForValue().set(key, character, 7, TimeUnit.DAYS);
+                redisTemplate.opsForValue().set(key, character, 5, TimeUnit.MINUTES);
             }
             log.info("人设列表缓存完成，共缓存 {} 条记录", characters.size());
         } catch (Exception e) {