fix: limit media size in tweet composer media uploads - [CU-869bga43d]

[Exo1i]

This pull request introduces file size validation for media uploads in the TweetComposer component, ensuring that images and videos do not exceed specified size limits (5MB for images, 10MB for videos). It also refines permission handling in the useMediaLibrary hook to avoid unnecessary permission prompts and improve user experience. The test suite is updated to mock file system checks and reflect the new logic.

Media upload validation and user feedback:

• Added file size checks before allowing images or videos to be attached in TweetComposer, displaying alerts if files are too large [1] [2] [3] [4].
• Introduced expo-file-system/legacy for file size retrieval and a helper function checkFileSize [1] [2].

Test updates:

• Mocked expo-file-system in tests to simulate file size checks.
• Updated tests to remove the now-unused allowsEditing property from media picker calls [1] [2].

Permission handling improvements:

• Improved logic in useMediaLibrary to only request permissions when necessary and prevent repeated prompts, with clearer user feedback on denied permissions [1] [2] [3].

[Exo1i]

Task linked: CU-869bga43d fix: limit media size in tweet composer media uploads

[github-actions]

Unit Tests Coverage Report

Coverage after merging fix/limit-media-size into dev will be

90.71%

Coverage Report for Changed Files

File	Stmts	Branches	Funcs	Lines	Uncovered Lines
src/components/ui
TweetComposer.tsx	75.45%	66%	65.79%	84.42%	120–122, 135, 140, 169–170, 170, 170–172, 172, 176, 178, 185–186, 196, 196, 220–222, 235–236, 280, 290–291, 294, 299, 302, 308, 308, 308–309, 309, 309, 316–318, 329, 333–334, 338, 344, 347, 359–361, 373, 377–378, 382, 388, 390, 392, 395, 398, 408, 408–409, 428, 430, 436, 441–442, 462, 467–469, 522–523, 635, 647, 80, 80, 80, 80–81, 83, 83, 83–85
src/hooks
useMediaLibrary.ts	87.64%	74.19%	100%	94.34%	31, 55, 62, 68, 72, 78, 8, 80, 80, 90, 95