kernelcache fixes

[rooootdev]

on behalf of @forestg10.

[Copilot]

Pull request overview

This PR improves the kernelcache/offsets flow by ensuring offsets are only marked present when they’ve actually been resolved from a valid kernelcache, hardening the kernelcache fetch routine, and refining iPad model detection used during offsets initialization.

Changes:

• Update the UI “Fetch Kernelcache” flow to resolve offsets (dlkcache()) after a successful fetch, and set hasOffsets based on that result.
• Harden fetchkcache() with readiness guards, robust read/write loops, and a basic output validity check before accepting the fetched kernelcache.
• Avoid misclassifying certain A-series iPads as M-series in offsets_init() by excluding known A-series identifiers.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
lara/views/app/settings/SettingsView.swift	Sets hasOffsets based on dlkcache() result after a successful kernelcache fetch.
lara/views/app/ContentView.swift	Mirrors the Settings flow: hasOffsets reflects whether offsets resolution succeeded.
lara/kexploit/offsets.m	Refines M-series iPad detection by excluding known A-series iPad identifiers.
lara/funcs/fetchkcache.swift	Adds readiness checks, robust IO, and validates kernelcache output before reporting success.
lara/classes/laramgr.swift	Requires hasOffsets before allowing VFS init / sandbox escape to start.

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