Pushes configured phone folders (DCIM, WhatsApp media, call recordings, and so on) to a home SSH host using rsync over SSH. One-way push only, on WiFi by default, periodic or on demand. rsync and the SSH transport are built from source and shipped inside the APK; nothing prebuilt is bundled. The app needs all-files access to read arbitrary backup folders such as OEM call-recording directories. Features: * Incremental transfers; large videos resume (rsync --partial). * Per-folder deletion policy: additive backup or mirror. * Runs on unmetered WiFi, periodically or on demand. * ed25519 key auth with strict, pinned host-key verification.