ui_preview: auto expand diffs (#33887)

auto exp

.github/workflows/ui_preview.yaml

@@ -88,22 +88,20 @@ jobs:
           A=($scenes)
 
           DIFF=""
-          open=false
-          TABLE="<summary>All Screenshots</summary>"
+          TABLE="<details><summary>All Screenshots</summary>"
           TABLE="${TABLE}<table>"
 
           for ((i=0; i<${#A[*]}; i=i+1));
           do
 
             if ! compare -fuzz 2% -highlight-color DeepSkyBlue1 -lowlight-color Black -compose Src ${{ github.workspace }}/master_ui/${A[$i]}.png ${{ github.workspace }}/pr_ui/${A[$i]}.png ${{ github.workspace }}/pr_ui/${A[$i]}_diff.png; then
-              open=true
               convert ${{ github.workspace }}/pr_ui/${A[$i]}_diff.png -transparent black mask.png
               composite mask.png ${{ github.workspace }}/master_ui/${A[$i]}.png composite_diff.png
               convert -delay 100 ${{ github.workspace }}/master_ui/${A[$i]}.png composite_diff.png -loop 0 ${{ github.workspace }}/pr_ui/${A[$i]}_diff.gif
 
               mv ${{ github.workspace }}/master_ui/${A[$i]}.png ${{ github.workspace }}/pr_ui/${A[$i]}_master_ref.png
 
-              DIFF="${DIFF}<details>"
+              DIFF="${DIFF}<details open>"
               DIFF="${DIFF}<summary>${A[$i]} : \$\${\\color{red}\\text{DIFFERENT}}\$\$</summary>"
               DIFF="${DIFF}<table>"
 
@@ -133,14 +131,7 @@ jobs:
             fi
           done
 
-          TABLE="${TABLE}</table>"
-          TABLE="${TABLE}</details>"
-
-          if $open; then
-            TABLE="<details open>${TABLE}"
-          else
-            TABLE="<details>${TABLE}"
-          fi
+          TABLE="${TABLE}</table></details>"
 
           echo "DIFF=$DIFF$TABLE" >> "$GITHUB_OUTPUT"