Add in-guest acceptance test suite

Runs inside a live Omarchy session (typically a VM installed by
omarchy-iso-test) and verifies the desktop actually works: session
health, application launches by window class, and shell surfaces via
IPC — including typing into the launcher and launching the top hit.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

test/acceptance.d/session-test.sh

@@ -0,0 +1,56 @@
+#!/bin/bash
+
+set -euo pipefail
+
+source "$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)/base-test.sh"
+
+# The compositor reports at least one monitor
+monitors=$(hyprctl -j monitors | jq 'length')
+(( monitors >= 1 )) || fail "compositor reports a monitor"
+pass "compositor reports a monitor"
+
+# The Omarchy shell is running and responsive
+wait_until "omarchy-shell responds to ping" 60 omarchy-shell shell ping
+
+# Core shell plugins are loaded
+plugins=$(omarchy-shell shell listPlugins)
+for plugin in omarchy.bar omarchy.launcher omarchy.emojis omarchy.menu omarchy.notifications; do
+  [[ $plugins == *"$plugin"* ]] || fail "shell plugin is loaded: $plugin" "loaded plugins: $plugins"
+  pass "shell plugin is loaded: $plugin"
+done
+
+# The bar and background are actually on screen
+wait_until "bar layer is on screen" 30 layer_present "omarchy-bar"
+wait_until "background layer is on screen" 30 layer_present "omarchy-background"
+
+# Audio stack is up
+wait_until "pipewire is running" 30 wpctl status
+
+# Root filesystem is btrfs as installed
+[[ $(findmnt -no FSTYPE /) == "btrfs" ]] || fail "root filesystem is btrfs"
+pass "root filesystem is btrfs"
+
+# Omarchy reports its version
+omarchy-version >/dev/null || fail "omarchy-version works"
+pass "omarchy-version works"
+
+# No failed units, system or user. OMARCHY_ACCEPTANCE_IGNORE_UNITS can hold a
+# regex of units to overlook (useful on dev machines; a fresh VM should be clean).
+failed_units() {
+  systemctl "$@" --failed --no-legend --plain | awk '{print $1}' |
+    grep -Ev "${OMARCHY_ACCEPTANCE_IGNORE_UNITS:-^$}" || true
+}
+
+failed_system=$(failed_units --system)
+if [[ -n $failed_system ]]; then
+  fail "no failed system units" "failed units: $failed_system"
+fi
+pass "no failed system units"
+
+failed_user=$(failed_units --user)
+if [[ -n $failed_user ]]; then
+  fail "no failed user units" "failed units: $failed_user"
+fi
+pass "no failed user units"
+
+screenshot "desktop"