feat: Add Gemini safety settings configuration support (close #703)

model/option.go

@@ -115,6 +115,7 @@ func InitOptionMap() {
 	common.OptionMap["SensitiveWords"] = setting.SensitiveWordsToString()
 	common.OptionMap["StreamCacheQueueLength"] = strconv.Itoa(setting.StreamCacheQueueLength)
 	common.OptionMap["AutomaticDisableKeywords"] = setting.AutomaticDisableKeywordsToString()
+	common.OptionMap["GeminiSafetySettings"] = setting.GeminiSafetySettingsJsonString()
 
 	common.OptionMapRWMutex.Unlock()
 	loadOptionsFromDatabase()
@@ -351,6 +352,8 @@ func updateOptionMap(key string, value string) (err error) {
 		setting.SensitiveWordsFromString(value)
 	case "AutomaticDisableKeywords":
 		setting.AutomaticDisableKeywordsFromString(value)
+	case "GeminiSafetySettings":
+		setting.GeminiSafetySettingFromJsonString(value)
 	case "StreamCacheQueueLength":
 		setting.StreamCacheQueueLength, _ = strconv.Atoi(value)
 	}