fix(visualization): correct @electron/packager import to use named export

The @electron/packager v19 now exports packager as a named export instead of default export. Updated the require statement to use destructuring to fix "packager is not a function" error in release workflow.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: christian-huehn-mw

visualization/script/appBuild.js

@@ -1,6 +1,6 @@
 #!/usr/bin/env node
 
-const packager = require("@electron/packager")
+const { packager } = require("@electron/packager")
 const path = require("node:path")
 
 const { paths } = require("./appConfig.json")