fix(updates): reuse Android APK after installer dismissal

[veryCrunchy]

Outcome

Retain the verified APK after Android opens the system installer. If the user dismisses confirmation, the update card can reopen it without downloading the package again.

Before reuse, the cached APK goes through the same checksum, package identity, version, SDK, and signer verification as a new download. Invalid cached packages are discarded. Coroutine cancellation is preserved, and installer failures retain the current structured, privacy-preserving diagnostics.

The retry action and APK-specific wording appear only for direct-release Android updates. Desktop installer behavior is unchanged. The UI change is integrated into the current AppUpdateSettings component.

Follow-up to #176.

Validation

On the dedicated Linux build host at source head 5b703db23b4520290915c5b8c9f8d34579adfa21, tree f6cfb3e9:

• AndroidProjectContentClientTest: 14 tests passed.
• ProjectNewsAndUpdatesTest: 5 tests passed.
• No failures, errors, or skips in those focused classes.
• Android and desktop production compilation passed.
• :androidApp:assembleDebug passed.
• bash tools/check-repository.sh and git diff --check passed.

The branch includes main at 92dd2ae9cec1dc7dac16907e66d7b870694ebbbf. Hosted checks and regenerated marketing captures are separate merge gates.

Evidence limits

This revision has deterministic test and build coverage. It does not include a device or emulator run that dismisses and reopens Android's system installer, or a signed release upgrade test.

[obiente-cloud]

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NC Native · df52e451e3aa · Ready

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[chatgpt-codex-connector]

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-09-09T05:17:56.682541Z	5b703db	New commits

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