feat: Notifications Shared Client

[danctila]

Description

This is taken from the mobile notifications PR #282 so web and mobile can both be worked on in parallel.

• Would move towards feat: Web Notifications: Backend linking #231

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Refactoring (code improvement without changing functionality)
• Documentation update
• Configuration/infrastructure change
• Performance improvement
• Test coverage improvement

Related Issue(s)

Related to #231

What Changed?

• Added shared Notification types and API hooks (useGetNotifications, useMarkNotificationRead, useMarkAllNotificationsRead, usePostDeviceToken)

Pre-Merge Checklist

Code Quality

• Code follows the project's style guidelines and conventions
• Self-review completed (I've reviewed my own code for obvious issues)
• No debugging code, console logs, or commented-out code left behind
• No merge conflicts with the base branch
• Meaningful commit messages that explain the "why"

Testing & CI

• All CI checks are passing
• All new and existing tests pass locally
• Test coverage hasn't decreased (or decrease is justified)
• Linting passes without errors

Documentation

• Code is self-documenting or includes helpful comments for complex logic
• API documentation updated (if backend endpoints changed)
• Type definitions are accurate and up-to-date

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 1.89%. Comparing base (701420a) to head (812935a).
⚠️ Report is 1 commits behind head on main.

❗ There is a different number of reports uploaded between BASE (701420a) and HEAD (812935a). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (701420a)	HEAD (812935a)
backend	1	0

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #288       +/-   ##
==========================================
- Coverage   19.66%   1.89%   -17.77%     
==========================================
  Files          46      85       +39     
  Lines        2253    3268     +1015     
  Branches        0      24       +24     
==========================================
- Hits          443      62      -381     
- Misses       1796    3206     +1410     
+ Partials       14       0       -14     

Flag	Coverage Δ
backend	?
mobile	84.00% <ø> (?)
web	0.62% <ø> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.
see 131 files with indirect coverage changes

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[Dao-Ho]

LGTM 🐐