[Enhancement] Add video player crash recovery with automatic position resume

[RUKAYAT-CODER]

Overview

The video player crashes silently on codec errors, DRM failures, and network interruptions during playback — returning to a black screen with no error message and no automatic recovery. Users must manually close and reopen the lesson to resume. A crash recovery mechanism that detects the failure, logs it, and automatically retries playback from the last saved position would significantly improve the lesson completion experience.

Specifications

Features:

• Video player detects onError and classifies error: network, codec, DRM, unknown
• Network error: retry 3 times with exponential backoff, then show 'Check connection' message
• Codec error: attempt fallback quality (360p); if fails, show error with 'Report issue' CTA
• DRM error: show 'Your subscription may have expired' with settings link
• All errors reported to Sentry with video URL, codec, position, and device info

Tasks:

• Add onError handler in MobileVideoPlayer.tsx with error classification
• Implement retry logic with backoff for network errors
• Implement quality fallback for codec errors
• Save last playback position to AsyncStorage on error before retry
• Add unit test for each error classification path

Impacted Files:

• src/components/mobile/MobileVideoPlayer.tsx

Acceptance Criteria

• Network interruption during video triggers automatic retry (max 3 times)
• After 3 failed retries, user sees network error message with retry button
• Codec error attempts 360p fallback before showing error
• DRM error shows specific message with subscription link
• Sentry receives error event with codec and position context

[Dydex]

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

Hi Maintainer, Pls I can work on this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Dydex to this issue.

[Richardkingz2019]

@Richardkingz2019 has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

I would love to work on this .

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Richardkingz2019 to this issue.

[Jerry-Tekh]

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

Hi Repo Manager, I’ll take this.

I’ll add crash recovery to rinafcode/teachLink_mobile: classify onError in MobileVideoPlayer.tsx, network retry x3 with backoff, codec fallback to 360p, DRM subscription prompt, AsyncStorage position resume, and Sentry reporting with codec/position/device context.

Please assign me

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Jerry-Tekh to this issue.