improve misfire feedback

Author: ylxmf2005

src/renderer/src/locales/en/translation.json

@@ -119,7 +119,7 @@
     "failedCapture": "Failed to capture {{source}} frame",
     "failedParseWebSocket": "Failed to parse WebSocket message",
     "websocketNotOpen": "WebSocket is not open.",
-    "vadMisfire": "Voice detected but too brief. Try speaking longer or check audio settings."
+    "vadMisfire": "Voice detected but too brief. Try speaking louder/longer, or adjust settings (lower speech threshold, lower negative threshold, reduce redemption frames)."
   },
   "aiState": {
     "idle": "idle",

src/renderer/src/locales/zh/translation.json

@@ -116,7 +116,7 @@
     "failedCapture": "捕获{{source}}帧失败",
     "failedParseWebSocket": "解析WebSocket消息失败",
     "websocketNotOpen": "WebSocket未连接",
-    "vadMisfire": "检测到语音但过于简短，请尝试说话更久或检查音频设置"
+    "vadMisfire": "检测到语音但过于简短，请尝试提高音量或说得更久一些，或调整识别设置（降低语音识别阈值、降低负面语音阈值、减少验证帧数）"
   },
   "aiState": {
     "idle": "空闲",