Remove rotation animations from circular buttons on hover

- Removed rotate(5deg) from icon buttons hover state
- Removed rotate(5deg) from FAB buttons hover state
- Removed icon-hover-rotate mixin from nav items
- Keep scale animations but remove tilt/rotation effects

Buttons now scale without rotating for cleaner interaction

layouts/member.vue

@@ -355,7 +355,6 @@ watch(width, (newWidth) => {
   position: relative;
   overflow: hidden;
   @include ripple-effect();
-  @include icon-hover-rotate(10deg);
   
   &:hover {
     background: linear-gradient(135deg,