fix: fix weather null pointer tip

src/main/kotlin/cn/rtast/fancybot/commands/WeatherCommand.kt

@@ -28,24 +28,32 @@ class WeatherCommand : BaseCommand() {
             listener.sendGroupMessage(message.groupId, msg)
             return
         }
+        try {
             val locationName = args.first()
-        val lookupLocationId = Http.get<Geo>(
+            val lookupLocation = Http.get<Geo>(
                 "https://geoapi.qweather.com/v2/city/lookup",
                 mapOf("location" to locationName, "key" to configManager.qweatherKey)
-        ).location.first().id
+            ).location.first()
             val weather = Http.get<Weather>(
                 "https://devapi.qweather.com/v7/weather/now",
-            mapOf("location" to lookupLocationId, "key" to configManager.qweatherKey)
+                mapOf("location" to lookupLocation.id, "key" to configManager.qweatherKey)
             )
             val msg = MessageChain.Builder()
                 .addAt(message.sender.userId)
                 .addNewLine()
-            .addText("城市: $locationName, 温度: ${weather.now.temp} ℃")
+                .addText("城市: ${lookupLocation.name}, 温度: ${weather.now.temp} ℃")
                 .addNewLine()
                 .addText("${weather.now.text}/${weather.now.windDir}")
                 .addNewLine()
                 .addText("数据来源: ${weather.refer.sources.joinToString(",")}")
                 .build()
             listener.sendGroupMessage(message.groupId, msg)
+        } catch (_: NullPointerException) {
+            val msg = MessageChain.Builder()
+                .addAt(message.sender.userId)
+                .addText("没有查询到该城市的天气信息哦~")
+                .build()
+            listener.sendGroupMessage(message.groupId, msg)
+        }
     }
 }