Implement Notification Preferences Page

[Mosas2000]

## Description

Add a preferences page for configuring how and where users receive notifications.

## Requirements and context

- Channel toggles

• Digest frequency

• Quiet hours

• Priority overrides

• Persistent settings

• Accessible forms

  Suggested execution

  Fork the repo and create a branch

  git checkout -b feature/frontend-notification-preferences

  Implement changes

  • Create notification preferences page

• Wire settings to notification storage

• Add validation and persistence

• Document preference options

  Example commit message

  feat: implement notification preferences page

  Guidelines

  • Assignment required before starting
  • PR must include a closing reference to this issue
  • Include screenshots or examples where applicable
  • Timeframe: 72 hours