Migrate from jpegio to jpeglib for Python 3.13+ support

- Replace jpegio with jpeglib (jpeglib.to_jpegio compatibility layer)
- Update Python requirement to >=3.11, add 3.13/3.14 classifiers
- AUR: Add install script for user creation and permissions
- AUR: Install frontends to site-packages, create Flask instance dir
- AUR: Use dynamic ${pyver} for systemd WorkingDirectory

Tested: CLI, Web UI (Gunicorn), API (Uvicorn), DCT jpeglib roundtrip

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

aur/PKGBUILD

@@ -1,31 +1,31 @@
 # Maintainer: Aaron D. Lee <your-email@example.com>
 pkgname=stegasoo-git
-pkgver=4.1.7.r0.g1acb5a3
+pkgver=4.2.0.r0.g530e5de
 pkgrel=1
 pkgdesc="Secure steganography with hybrid photo + passphrase + PIN authentication"
 arch=('x86_64')
 url="https://github.com/adlee-was-taken/stegasoo"
 license=('MIT')
 
-# NOTE: Requires Python 3.12 (jpegio not compatible with 3.13 yet)
+# Python 3.11-3.14 supported (uses jpeglib for modern Python compatibility)
 depends=(
-    'python312'  # AUR package - jpegio requires 3.12
+    'python>=3.11'
 )
 makedepends=(
     'git'
-    'python312'
+    'python'
+    'python-build'
+    'python-hatchling'
 )
 optdepends=(
     'zbar: QR code reading from webcam/images'
 )
 provides=('stegasoo')
 conflicts=('stegasoo')
+install=stegasoo-git.install
 source=("${pkgname}::git+https://github.com/adlee-was-taken/stegasoo.git#branch=main")
 sha256sums=('SKIP')
 
-# Python 3.12 from AUR package
-_python="/usr/bin/python3.12"
-
 pkgver() {
     cd "$pkgname"
     git describe --long --tags 2>/dev/null | sed 's/^v//;s/\([^-]*-g\)/r\1/;s/-/./g' || \
@@ -34,32 +34,32 @@ pkgver() {
 
 build() {
     cd "$pkgname"
-
-    echo "Using Python: $_python ($($_python --version))"
-
-    # Bootstrap pip for python312
-    $_python -m ensurepip --user --upgrade
-
-    # Install build dependencies
-    $_python -m pip install --user build hatchling
-
-    # Build wheel
-    $_python -m build --wheel --no-isolation
+    python -m build --wheel --no-isolation
 }
 
 package() {
     cd "$pkgname"
 
+    # Detect Python version for site-packages path
+    local pyver=$(python -c 'import sys; print(f"{sys.version_info.major}.{sys.version_info.minor}")')
+
     # Install to /opt/stegasoo with dedicated venv
     install -dm755 "$pkgdir/opt/stegasoo"
 
     # Create fresh venv in package
-    $_python -m venv "$pkgdir/opt/stegasoo/venv"
+    python -m venv "$pkgdir/opt/stegasoo/venv"
 
     # Install the wheel with all extras
     local wheel=$(ls dist/*.whl | head -1)
     "$pkgdir/opt/stegasoo/venv/bin/pip" install --no-cache-dir "${wheel}[all]"
 
+    # Install frontends (not included in wheel)
+    local site_packages="$pkgdir/opt/stegasoo/venv/lib/python${pyver}/site-packages"
+    cp -r frontends "$site_packages/"
+
+    # Create instance directory for Flask (writable by stegasoo user)
+    install -dm755 "$pkgdir/opt/stegasoo/venv/var/app-instance"
+
     # Fix shebangs - replace build-time paths with installed paths
     find "$pkgdir/opt/stegasoo/venv/bin" -type f -exec \
         sed -i "s|$pkgdir/opt/stegasoo/venv|/opt/stegasoo/venv|g" {} \;
@@ -86,7 +86,7 @@ After=network.target
 [Service]
 Type=simple
 User=stegasoo
-WorkingDirectory=/opt/stegasoo/venv/lib/python3.12/site-packages/frontends/web
+WorkingDirectory=/opt/stegasoo/venv/lib/python${pyver}/site-packages/frontends/web
 Environment="PATH=/opt/stegasoo/venv/bin"
 ExecStart=/opt/stegasoo/venv/bin/gunicorn -b 127.0.0.1:5000 app:app
 Restart=on-failure
@@ -104,7 +104,7 @@ After=network.target
 [Service]
 Type=simple
 User=stegasoo
-WorkingDirectory=/opt/stegasoo/venv/lib/python3.12/site-packages/frontends/api
+WorkingDirectory=/opt/stegasoo/venv/lib/python${pyver}/site-packages/frontends/api
 Environment="PATH=/opt/stegasoo/venv/bin"
 ExecStart=/opt/stegasoo/venv/bin/uvicorn main:app --host 127.0.0.1 --port 8000
 Restart=on-failure

aur/stegasoo-git.install

@@ -0,0 +1,40 @@
+post_install() {
+    # Create stegasoo system user if it doesn't exist
+    if ! getent passwd stegasoo >/dev/null; then
+        useradd -r -s /usr/bin/nologin -d /opt/stegasoo stegasoo
+        echo "Created system user 'stegasoo'"
+    fi
+
+    # Set ownership of instance directory for Flask
+    chown -R stegasoo:stegasoo /opt/stegasoo/venv/var/app-instance 2>/dev/null || true
+
+    echo ""
+    echo "Stegasoo installed successfully!"
+    echo ""
+    echo "CLI usage:"
+    echo "  stegasoo --help"
+    echo ""
+    echo "To start the web UI:"
+    echo "  sudo systemctl start stegasoo-web"
+    echo ""
+    echo "To start the REST API:"
+    echo "  sudo systemctl start stegasoo-api"
+    echo ""
+}
+
+post_upgrade() {
+    post_install
+}
+
+pre_remove() {
+    # Stop services if running
+    systemctl stop stegasoo-web 2>/dev/null || true
+    systemctl stop stegasoo-api 2>/dev/null || true
+}
+
+post_remove() {
+    # Optionally remove the stegasoo user
+    # userdel stegasoo 2>/dev/null || true
+    echo "Stegasoo removed. User 'stegasoo' was not removed."
+    echo "To remove: userdel stegasoo"
+}