Add Avahi mDNS validation to test scripts

sanity-test.sh (live ISO):
- Check avahi-daemon is enabled
- Check avahi-daemon is running

test-install.sh (installed system):
- Check avahi and nss-mdns packages installed
- Check avahi-daemon service enabled

2 files changed, 25 insertions, 2 deletions

diff --git a/scripts/sanity-test.sh b/scripts/sanity-test.sh
index 977f018..0b338a3 100755
--- a/scripts/sanity-test.sh
+++ b/scripts/sanity-test.sh
@@ -265,12 +265,21 @@ run_sanity_tests() {
         "systemctl is-enabled NetworkManager 2>/dev/null || echo 'available'" \
         ""
 
-    # Test 8: Kernel version (LTS)
+    # Test 8: Avahi mDNS for network discovery
+    run_test "Avahi daemon enabled" \
+        "systemctl is-enabled avahi-daemon" \
+        "enabled"
+
+    run_test "Avahi daemon running" \
+        "systemctl is-active avahi-daemon" \
+        "active"
+
+    # Test 9: Kernel version (LTS)
     run_test "Running LTS kernel" \
         "uname -r" \
         "lts"
 
-    # Test 9: archsetup directory present
+    # Test 10: archsetup directory present
     run_test "archsetup directory present" \
         "test -d /code/archsetup && echo 'exists'" \
         "exists"
diff --git a/scripts/test-install.sh b/scripts/test-install.sh
index f9b574e..de308f2 100755
--- a/scripts/test-install.sh
+++ b/scripts/test-install.sh
@@ -268,6 +268,20 @@ verify_install() {
         else
             warn "Genesis snapshot not found (may not have completed)"
         fi
+
+        # Check Avahi mDNS packages installed on target system
+        if ssh_cmd "arch-chroot /mnt pacman -Q avahi nss-mdns >/dev/null 2>&1"; then
+            info "Avahi packages installed"
+        else
+            warn "Avahi packages not found on installed system"
+        fi
+
+        # Check avahi-daemon enabled on target system
+        if ssh_cmd "arch-chroot /mnt systemctl is-enabled avahi-daemon >/dev/null 2>&1"; then
+            info "Avahi daemon enabled"
+        else
+            warn "Avahi daemon not enabled on installed system"
+        fi
     else
         # For no-SSH tests, check serial console output
         if grep -q "Installation complete" "$SERIAL_LOG" 2>/dev/null; then