fix: qarma_select returns empty with plain --list

Use --radiolist --print-column=2 so the selected screen value is
actually printed. Plain --list printed nothing on selection, so the
qarma set flow exited without applying. Caught in hardware smoke test.

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

2 files changed, 32 insertions, 2 deletions

diff --git a/tests/wallp.bats b/tests/wallp.bats
index d7edaec..e809c13 100644
--- a/tests/wallp.bats
+++ b/tests/wallp.bats
@@ -238,6 +238,32 @@ teardown() {
   [[ "$output" == *"no display"* ]]
 }
 
+@test "set qarma path applies selected screen" {
+  CONF_OUTPUT_H="DP-1"; CONF_OUTPUT_V="DP-3"; CONF_THEME="conf"
+  export WAYLAND_DISPLAY="wayland-0"
+  : > "$HOME/picked.png"
+  # qarma stub: --list returns the screen choice; --file-selection returns a path.
+  # Real qarma --list returns the chosen row only with --radiolist and
+  # --print-column=2; a plain --list prints nothing. The stub mirrors that, so
+  # this test fails unless qarma_select uses the correct flags.
+  cat > "$STUB_DIR/qarma" <<EOF
+#!/bin/bash
+echo "qarma \$*" >> "$TMP_HOME/calls.log"
+case "\$*" in
+  *--list*)
+    case "\$*" in
+      *--radiolist*--print-column=2*|*--print-column=2*--radiolist*) echo "V" ;;
+    esac ;;
+  *--file-selection*) echo "$HOME/picked.png" ;;
+esac
+exit 0
+EOF
+  chmod +x "$STUB_DIR/qarma"
+  do_set ""
+  grep -q "swaybg -o DP-3 -i $HOME/picked.png" "$HOME/calls.log"
+  ! grep -q "swaybg -o DP-1" "$HOME/calls.log"
+}
+
 @test "bare invocation shows help" {
   unset WAYLAND_DISPLAY
   run main
diff --git a/wallp b/wallp
index 21f491b..339b0dc 100755
--- a/wallp
+++ b/wallp
@@ -207,8 +207,12 @@ finalize() {
 # Interactive selection via qarma. Populates SET_H/SET_V. Isolated for testing.
 qarma_select() {
   local choice file
-  choice="$(qarma --list --title="wallp" --text="Which screen?" \
-    --column="Screen" H V Both 2>/dev/null)" || return 1
+  # --radiolist + --print-column=2 is required: a plain --list returns nothing
+  # on selection. Column 1 is the radio bool, column 2 the screen value.
+  choice="$(qarma --list --radiolist --print-column=2 \
+    --title="wallp" --text="Which screen?" \
+    --column="Pick" --column="Screen" \
+    FALSE H FALSE V FALSE Both 2>/dev/null)" || return 1
   case "$choice" in
     H|Both)
       file="$(qarma --file-selection --preview-images 500 --width 1300 --height 600 \