Feature/darkmode : fix(ui) login blank page, password eye icon, and admin dark mode backgrounds

[imSubhro]

Summary

Fixes three UI issues reported by the project owner.

Changes

1. Fix blank login page

• src/index.jsx (real entry point) was missing GoogleOAuthProvider wrapper, causing a runtime crash and blank white page
• Cleaned up src/main.jsx which had broken loose JSX outside ReactDOM.createRoot
• Fixed index.html @styles/ links that didn't resolve (Vite aliases don't work in HTML tags)

2. Fix duplicate eye icon on password field

• Added CSS to hide the browser's native password reveal icon (Edge/IE ::-ms-reveal) which was appearing alongside the custom white eye icon in
  Login.jsx

3. Admin pages dark mode — background & typography

• Added admin-content class to in AdminLayout.jsx as a CSS scope anchor
• Imported global.css in App.jsx (it was never loaded)
• Added CSS overrides in global.css to force rgb(31 41 55) background and white/light-gray text on all admin components in dark mode — covers all 49
  admin component files without modifying each one individually

Pages affected

Dashboard, Menu, Orders, UPI, QR Code, Profile, Branches, Website

[rdodiya]

Hi @imSubhro ,
Please revert the package-lock.json and below are some suggestions

The below UI is looked perfect as there is border line and all text is visible which differ cards from background in dark mode but in light mode

Light mode that difference is missing

Some text color is white which are invisible due to white bg , please fix this