refactor: remove exact cross-layer css duplicates

frontend/styles/styles.css

@@ -666,10 +666,6 @@ time {
   box-shadow: var(--shadow-soft);
 }
 
-.workspace-view.active-view {
-  display: block;
-}
-
 .workspace-view.active-view.view-entering {
   animation: view-enter var(--motion-medium) var(--ease-out) both;
 }
@@ -4745,10 +4741,6 @@ textarea {
   outline-color: rgba(29, 101, 193, 0.48);
 }
 
-body.sidebar-collapsed {
-  grid-template-columns: 64px minmax(0, 1fr);
-}
-
 body.sidebar-collapsed .module-nav {
   width: 64px;
   padding-right: 7px;
@@ -5369,8 +5361,6 @@ body.sidebar-collapsed .sidebar-collapse-button .lucide {
   border-right: 1px solid var(--border);
   transition: background-color var(--motion-medium) ease, opacity var(--motion-medium) ease;
 }
-.rotation-day:last-child { border-right: 0; }
-
 .rotation-day header { display: grid; gap: 2px; margin-bottom: 8px; }
 .rotation-day header time { font-size: 12px; font-weight: 700; }
 .rotation-day header span { color: var(--text-secondary); font-size: 10px; }
@@ -7130,11 +7120,6 @@ body.sidebar-collapsed .sidebar-collapse-button .lucide {
   box-shadow: 1px 0 0 var(--border);
 }
 
-#screenerView .probability-value strong,
-#screenerView .probability-value small {
-  display: block;
-}
-
 #screenerView .probability-value small {
   margin-top: 3px;
   color: var(--text-secondary);