Let the live Hyprland session fall back to software rendering

On GPU-less targets (VMs, headless, exotic hardware) wlroots refuses to
initialise without a hardware renderer, so the autologin session exec'd
Hyprland on tty1 and it died immediately — leaving a blinking cursor and
no desktop, while tty2 still showed the (correct) `bos` login.

Export WLR_RENDERER_ALLOW_SOFTWARE=1 before exec Hyprland in root's
.bash_profile so wlroots may use the llvmpipe software renderer when no
GPU renderer exists. On real hardware the hardware renderer is still
chosen; this is purely a fallback. Also set WLR_NO_HARDWARE_CURSORS=1 so
the pointer isn't invisible in VMs. Both must be real env vars (read at
wlroots init), not Hyprland `env=` lines, which apply too late.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

iso/airootfs/root/.bash_profile

@@ -1,4 +1,13 @@
 # Auto-start Hyprland on tty1 in the live session
 if [[ "$(tty)" == "/dev/tty1" ]] && [[ -z "$WAYLAND_DISPLAY" ]]; then
+    # Allow a software-rendering fallback so the live session comes up even
+    # without a GPU (VMs, headless, exotic hardware). On real hardware wlroots
+    # still selects the hardware renderer; this only permits llvmpipe when no
+    # GPU renderer is available. Must be exported before Hyprland starts —
+    # wlroots reads it at renderer init, earlier than any Hyprland `env=` line.
+    export WLR_RENDERER_ALLOW_SOFTWARE=1
+    # Software cursors: hardware-cursor planes are often unusable in VMs and
+    # show as invisible/garbled; this is the reliable choice for a live medium.
+    export WLR_NO_HARDWARE_CURSORS=1
     exec Hyprland
 fi