Feature: Android support

[alphaxleonidas]

• Added a new profile Termux in Cargo.toml for consistent Android builds.
• Added docs for building on Mobile (Android)

Limitation: Keyring feature will not work, hence removed in the compiled binary.

Untested:

• Out of the main features qr-login has not been tested. Tested and works fine.
• Creating an Android build on PC should be possible but has not been tested. Instructions available on the fork's main page.

Disclaimer: AI used.

[pullfrog]

Important

The Termux guide currently contains broken instructions and directs users to a third-party binary that conflicts with this project's provenance policy.

Reviewed changes Android support was reviewed across the new low-memory Cargo profile, README integration, and the complete Termux build and usage guide.

• Termux build profile — Adds a release-derived profile with lower optimization and LTO disabled for constrained on-device builds.
• Android entry points — Advertises Android operation and the lack of keyring support from the main README.
• Build and usage guide — Documents Termux installation, source and binary acquisition, compilation, PATH setup, and maFile setup/import flows.

ℹ️ Android support is not regression-tested

No Android-target build is exercised by the current CI or release workflow, so future dependency changes can silently invalidate the newly documented support. The exact feature/profile combination passes a host cargo check, but that does not validate linking against Android or preserve an upstream Android artifact.

Technical details

# Keep Android support reproducible

## Affected sites
- `.github/workflows/rust.yml:34` — CI cross-checks only desktop targets.
- `.github/workflows/release.yml:23-47` — the release matrix has no Android target.

## Required outcome
- Add an Android-target build check, or explicitly document Android support as a best-effort, manually tested on-device path with no upstream binary guarantee.

  ^{｜ Fix all ➔ ｜ Fix 👍s ➔ ｜ View workflow run ｜ Using GPT Sol (free via Pullfrog for OSS) ｜ 𝕏}

[pullfrog]

Important

No new issues were found in 2600636; the two remaining threads from the prior review still require action before merge.

Reviewed changes Reviewed the documentation corrections made since the prior Pullfrog review.

• Cross-compilation guidance — Removed the dead reference to the deleted docs/ANDROID.md guide while preserving the scope of the Termux instructions.
• Storage setup command — Corrected the troubleshooting note to use the valid termux-setup-storage command.

  ^{｜ Fix it ➔ ｜ View workflow run ｜ Using GPT Sol (free via Pullfrog for OSS) ｜ 𝕏}