fix: move Chromium download to Docker build phase

- Download Chromium from Google snapshots during Docker build (network works there)
- Chroot hook now only verifies and installs runtime dependencies
- Remove generated files from repo (OVMF_VARS.fd, qemu.pid, screenshots)
- Update isotest scripts to use .nogit/ directory structure
- Chromium kiosk verified working with Sway compositor

isobuild/config/autoinstall/user-data

@@ -66,10 +66,7 @@ autoinstall:
     # Enable eco-daemon service
     - curtin in-target -- systemctl enable eco-daemon
 
-    # Install Google Chrome
-    - curtin in-target -- wget -q -O /tmp/chrome.deb https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb
-    - curtin in-target -- apt-get install -y /tmp/chrome.deb
-    - curtin in-target -- rm /tmp/chrome.deb
+    # Chromium is already installed in the ISO via live-build hook
 
   # Reboot after installation
   shutdown: reboot

isobuild/config/hooks/normal/0060-install-chrome.hook.chroot

@@ -1,19 +1,54 @@
 #!/bin/sh
-# Install Chromium browser (from Ubuntu repos - more reliable than downloading Chrome)
+# Install Chromium dependencies
+# Chromium itself is pre-installed from Docker build (network works there)
 
 set -e
 
-echo "Installing Chromium browser..."
+echo "Installing Chromium dependencies..."
 
-# Install Chromium from Ubuntu repos
-apt-get update
-apt-get install -y chromium-browser
+# Verify Chromium was pre-installed from Docker build
+if [ ! -x /opt/chromium/chrome ]; then
+    echo "ERROR: Chromium not found at /opt/chromium/chrome"
+    echo "This should have been installed during Docker build"
+    exit 1
+fi
 
-# Create symlink so scripts expecting google-chrome-stable work
-ln -sf /usr/bin/chromium-browser /usr/bin/google-chrome-stable
+# Install required runtime dependencies for Chromium
+# Using --no-install-recommends to minimize size
+DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
+    libasound2t64 \
+    libatk-bridge2.0-0t64 \
+    libatk1.0-0t64 \
+    libatspi2.0-0t64 \
+    libcairo2 \
+    libcups2t64 \
+    libdrm2 \
+    libgbm1 \
+    libgtk-3-0t64 \
+    libnspr4 \
+    libnss3 \
+    libpango-1.0-0 \
+    libxcomposite1 \
+    libxdamage1 \
+    libxfixes3 \
+    libxkbcommon0 \
+    libxrandr2 \
+    fonts-liberation \
+    xdg-utils || true
 
-# Clean up
-apt-get clean
-rm -rf /var/lib/apt/lists/*
+# Verify the symlink exists
+if [ ! -x /usr/bin/chromium-browser ]; then
+    echo "Creating chromium-browser symlink..."
+    cat > /usr/bin/chromium-browser << 'WRAPPER'
+#!/bin/sh
+exec /opt/chromium/chrome "$@"
+WRAPPER
+    chmod +x /usr/bin/chromium-browser
+fi
 
-echo "Chromium browser installed."
+echo "Chromium dependencies installed."
+echo "Chromium available at:"
+ls -la /opt/chromium/chrome
+ls -la /usr/bin/chromium-browser
+
+echo "Chromium setup complete."