[n3crosis]

Fix or feature

• Fix
• Feature

What and why

This builds on the hot-framework loading support added in #1217, adding on-device re-signing for imported games.

Imported games can stop loading when their signing certificate expires or they were signed with a different identity from the installed app. This adds on-device re-signing so users can keep the existing game and saves instead of rebuilding or reimporting it. Optional game sharing and importing between devices can be added after this PR, building on this signing support.

Import a matching P12 and provisioning profile in Settings, then choose Re-sign game in the game’s Settings. Re-signing uses the installed app’s identity.

Checked

• Tested on a real iPhone, including successful on-device re-signing.
• Signing, localization and simulator UI tests passed.

Scope and implementation

• Supports imported frameworks with one native executable. Bundled games are unchanged. Frameworks with nested native code report an unsupported-resource-sealing error.
• Identity import checks the installed app's signer and profile membership. Credentials stay in device-only Keychain storage.
• Signing uses a private copy, checks iOS acceptance, then atomically replaces the framework.
• ShellMain.m passes a file offset to F_ADDFILESIGS_RETURN, as required by XNU, instead of a user-memory pointer. The unnecessary signature allocation/read is removed.
• Dependency: zsign 0a92e9a, including framework resource sealing and removal of framework entitlements.
• If this PR is accepted, upstream should host and maintain the zsign fork’s feat/swift-package branch for Swift Package Manager use, keeping the pinned immutable revision available.

Screenshots

View	Before	After
App Settings (en)
Game Settings (en)
Signing identity (en)	New screen; not available before this PR.

Other languages: de, es, fr, it, ja, ko, pt-BR, sv, zh-Hans

View	Before	After
App Settings (de)
Game Settings (de)
Signing identity (de)	New screen; not available before this PR.
App Settings (es)
Game Settings (es)
Signing identity (es)	New screen; not available before this PR.
App Settings (fr)
Game Settings (fr)
Signing identity (fr)	New screen; not available before this PR.
App Settings (it)
Game Settings (it)
Signing identity (it)	New screen; not available before this PR.
App Settings (ja)
Game Settings (ja)
Signing identity (ja)	New screen; not available before this PR.
App Settings (ko)
Game Settings (ko)
Signing identity (ko)	New screen; not available before this PR.
App Settings (pt-BR)
Game Settings (pt-BR)
Signing identity (pt-BR)	New screen; not available before this PR.
App Settings (sv)
Game Settings (sv)
Signing identity (sv)	New screen; not available before this PR.
App Settings (zh-Hans)
Game Settings (zh-Hans)
Signing identity (zh-Hans)	New screen; not available before this PR.

Scope

• No engine files are added.
• Before and after screenshots of the changed views are attached.
• No keys, game files or extracted game data are included.