MessageMe on Ubuntu Touch — install (portable tar.gz)

This is NOT an OpenStore / click package.
Do NOT tap the "messageme" file in File Manager and choose App Store —
install will fail with "not a valid click package".

Steps
-----
1. Download messageme-ubuntu-touch-arm64-*.tar.gz
2. Extract the MessageMe folder somewhere permanent, e.g.:
     ~/apps/MessageMe
3. Open Terminal and run:
     cd ~/apps/MessageMe
     chmod +x install-launcher.sh messageme messageme-launch.sh 2>/dev/null
     ./install-launcher.sh
4. Open the app drawer and pull down to refresh.
5. Tap the MessageMe icon (do not launch from Files).

First run also installs the drawer entry automatically if you start with:
     ./messageme
or:
     ./messageme-launch.sh

On-screen keyboard (important)
------------------------------
Flutter uses GTK. Lomiri's keyboard needs the GTK Maliit plugin, which many
UT images do NOT ship by default. If tapping Email/Password shows no keyboard:

  # make root writable, install, remount read-only (UBports / Ubuntu Touch)
  sudo mount -o remount,rw /
  sudo apt update
  sudo apt install -y maliit-inputcontext-gtk3
  sudo mount -o remount,ro /

Then fully close MessageMe and open it again from the drawer.

(The app sets GTK_IM_MODULE=maliitphablet automatically.)

Voice messages
--------------
Recording uses PulseAudio `parecord` (usually already present on Ubuntu Touch).
System `ffmpeg` is NOT required for voice notes.

If recording fails with a tools error:
  sudo mount -o remount,rw /
  sudo apt update
  sudo apt install -y pulseaudio-utils
  sudo mount -o remount,ro /

Updates
-------
In-app: Settings → App updates (bundled updater).
