Issue Title: Replace browser alert with custom popup for “Reset Data” action

[Shanidhya01]

Description

Currently, clicking the “Reset Data” button in the Analytics page triggers a native browser alert (window.confirm).
This looks outdated and inconsistent with the rest of the app’s UI.

Expected Behavior

When the “Reset Data” button is clicked, a custom confirmation popup/modal should appear (styled using the project’s design system), asking for confirmation to reset analytics data.

Steps to Reproduce

Go to Analytics tab.

Click Reset Data.

Notice the default browser alert appears.

Suggested Solution

Replace window.confirm() with a custom modal using React state or a UI library (e.g., Tailwind or shadcn/ui).

Modal should contain:

A warning message: “This will reset all analytics data. Are you sure?”

Cancel and Confirm buttons.

Smooth fade-in/out animation if possible.

[github-actions]

Welcome, @Shanidhya01! Thanks for raising the issue.
Soon the maintainers/owner will review it and provide you with feedback/suggestions.
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