Add integration test for useIsMobile hook returning correct value on resize

[Chucks1093]

Summary

The useIsMobile hook must update when the viewport width crosses the 768px breakpoint. An integration test should confirm the hook's return value changes correctly when the viewport is resized in both directions.

Scope

• Render a component using useIsMobile
• Mock viewport width at 500px and assert hook returns true
• Resize mock to 1024px and assert hook returns false
• Resize back to 600px and assert hook returns true again

Acceptance Criteria

• Hook returns true below 768px
• Hook returns false at or above 768px
• Hook updates correctly on resize in both directions

ETA: 12 hours

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Coordinate on Telegram

[DevScoopee]

@DevScoopee has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi, I understand what needs to be done and can deliver, kindly assign

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[egwujiohaifesinachiperpetual-max]

@egwujiohaifesinachiperpetual-max has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

please assign to me my ETA is 4hrs

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[devsimze]

@devsimze has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi I'd like to work on this issue

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