add left align (y axis)

web/kiri/index.css

@@ -213,6 +213,10 @@ details[open] summary::after {
     transform: rotate(90deg);
 }
 
+.rot90 {
+    transform: rotate(90deg);
+}
+
 /* for bambu mgr dialog */
 .video {
     border: 1px solid #888;

web/kiri/index.html

@@ -304,6 +304,10 @@
                 <i class="fas fa-arrows-down-to-line"></i>
                 <div class="pop">choose a face to place<br>on the work surface</div>
             </span>
+            <span id="context-lefty" xlk="rc_lafl">
+                <i class="fas fa-arrows-down-to-line rot90"></i>
+                <div class="pop">choose a face to align<br>to the y axis</div>
+            </span>
             <span id="context-setfocus" xlk="rc_focs">
                 <i class="fas fa-eye"></i>
                 <div class="pop">choose focal point<br>camera orbit center</div>