Simple Web UI for Tableau

I have several Tableau dashboards ready to go and now need a lightweight, desktop-focused interface that simply presents them in an organised, professional way. The goal is a clean front-end only—no heavy product work—just a small web app that pulls in each dashboard and lets users flip between them from a sidebar menu.

Core flow
• A user lands on a login screen, signs in with a basic username-and-password form, and is taken straight to the main page.
• The left-hand sidebar lists the dashboards; selecting one swaps the main content area to the embedded Tableau view.
• I do not need mobile or tablet responsiveness, so you can optimise layout and styling exclusively for standard desktop resolutions.

Tech notes
I’m flexible on the stack: a simple HTML/CSS/JavaScript setup is fine, but if React, Vue, or another lightweight framework speeds things up, feel free to use it. Just keep dependencies minimal and the styling uncluttered—think plenty of white space, subtle typography, and nothing that distracts from the visualisations.

Please include
- Source code with clear comments
- A short read-me on how to add or reorder dashboards and change credentials
- Any tweaks required on the Tableau side (e.g., trusted token settings or embed URLs)

If you can deliver a polished, no-frills interface that meets these points, I’d love to get this shipped quickly.