chore: remove dotenv dependency and update version to 1.6.4

main.js

@@ -79,11 +79,6 @@ const {createSystemTray, destroyTray} = require("./app/tray");
 const { stopServer } = require("./server/server");
 const {checkReportService} = require("./app/sendReport");
 
-/**
- * Expose .env in process.env
- */
-require("dotenv").config();
-
 /**
  * Global flag indicating if the application is intentionally shutting down.
  * Used across the app to bypass the "minimize to tray on close" behavior.