Adopt shared WebUI structural primitives

webui/src/styles/cases.css

@@ -1,19 +1,16 @@
 .cases-page,
-.cases-shell,
 .case-detail-shell {
   height: 100%;
   min-height: 0;
   overflow: hidden;
 }
 
-.cases-shell,
 .case-detail-shell {
   display: flex;
   flex-direction: column;
   background: var(--surface);
 }
 
-.cases-toolbar,
 .case-detail-toolbar {
   display: flex;
   align-items: center;
@@ -24,17 +21,7 @@
   background: var(--surface-raised);
 }
 
-.cases-search {
-  display: flex;
-  align-items: center;
-  gap: 8px;
-  width: min(560px, 100%);
-}
-
-.cases-search input {
-  min-width: 120px;
-  flex: 1;
-}
+.cases-search { flex: 1 1 560px; }
 
 .cases-status-filter {
   display: flex;
@@ -66,58 +53,6 @@
   padding: 16px 18px 24px;
 }
 
-.cases-list {
-  overflow: hidden;
-  border: 1px solid var(--border);
-  border-radius: 6px;
-  background: var(--surface-raised);
-}
-
-.case-list-row {
-  display: grid;
-  grid-template-columns: minmax(260px, 2fr) minmax(150px, 1fr) minmax(150px, 0.8fr) auto;
-  align-items: center;
-  gap: 16px;
-  width: 100%;
-  min-height: 66px;
-  padding: 10px 14px;
-  border: 0;
-  border-bottom: 1px solid var(--border);
-  background: transparent;
-  color: inherit;
-  text-align: left;
-  cursor: pointer;
-}
-
-.case-list-row:last-child {
-  border-bottom: 0;
-}
-
-.case-list-row:hover,
-.case-list-row:focus-visible {
-  background: var(--hover-bg);
-}
-
-.case-list-primary {
-  display: flex;
-  min-width: 0;
-  flex-direction: column;
-  gap: 3px;
-}
-
-.case-list-primary strong,
-.case-list-primary span {
-  overflow: hidden;
-  text-overflow: ellipsis;
-  white-space: nowrap;
-}
-
-.case-list-primary span,
-.case-list-row > span:not(.status-badge) {
-  color: var(--text-soft);
-  font-size: 0.84rem;
-}
-
 .case-detail-content {
   display: grid;
   grid-template-columns: minmax(0, 1fr) minmax(280px, 360px);
@@ -257,12 +192,6 @@
   border-left: 2px solid var(--accent);
 }
 
-.cases-empty {
-  padding: 36px 0;
-  color: var(--text-soft);
-  text-align: center;
-}
-
 .case-share-dialog {
   width: min(860px, calc(100vw - 32px));
   max-height: min(760px, calc(100vh - 32px));
@@ -398,27 +327,10 @@
 }
 
 @media (max-width: 860px) {
-  .cases-toolbar {
-    align-items: stretch;
-    flex-direction: column;
-  }
-
-  .cases-search {
-    width: 100%;
-  }
-
   .cases-count {
     margin-left: 0;
   }
 
-  .case-list-row {
-    grid-template-columns: minmax(0, 1fr) auto;
-  }
-
-  .case-list-row > span:not(.status-badge) {
-    display: none;
-  }
-
   .case-detail-content {
     grid-template-columns: 1fr;
   }