Adopt shared WebUI structural primitives

webui/src/styles/forms-runtime.css

@@ -1,29 +1,9 @@
-.forms-runtime-page,
-.forms-runtime-shell,
-.form-instance-shell {
+.forms-runtime-page {
   height: 100%;
   min-height: 0;
   overflow: hidden;
 }
 
-.forms-runtime-shell,
-.form-instance-shell {
-  display: flex;
-  flex-direction: column;
-  background: var(--surface);
-}
-
-.forms-runtime-toolbar,
-.form-instance-toolbar {
-  display: flex;
-  align-items: center;
-  gap: 14px;
-  min-height: 58px;
-  padding: 10px 18px;
-  border-bottom: 1px solid var(--border);
-  background: var(--surface-raised);
-}
-
 .forms-runtime-toolbar label {
   display: flex;
   align-items: center;
@@ -53,64 +33,6 @@
   margin: 0 auto 16px;
 }
 
-.forms-runtime-list {
-  overflow: hidden;
-  border: 1px solid var(--border);
-  border-radius: 6px;
-  background: var(--surface-raised);
-}
-
-.forms-runtime-row {
-  display: grid;
-  grid-template-columns: minmax(260px, 1fr) minmax(170px, auto) auto;
-  align-items: center;
-  gap: 16px;
-  width: 100%;
-  min-height: 64px;
-  padding: 10px 14px;
-  border: 0;
-  border-bottom: 1px solid var(--border);
-  background: transparent;
-  color: inherit;
-  text-align: left;
-  cursor: pointer;
-}
-
-.forms-runtime-row:last-child {
-  border-bottom: 0;
-}
-
-.forms-runtime-row:hover,
-.forms-runtime-row:focus-visible {
-  background: var(--hover-bg);
-}
-
-.forms-runtime-row-main {
-  display: flex;
-  min-width: 0;
-  flex-direction: column;
-  gap: 3px;
-}
-
-.forms-runtime-row-main strong,
-.forms-runtime-row-main span {
-  overflow: hidden;
-  text-overflow: ellipsis;
-  white-space: nowrap;
-}
-
-.forms-runtime-row-main span,
-.forms-runtime-row > span:not(.status-badge) {
-  color: var(--text-soft);
-  font-size: 0.84rem;
-}
-
-.forms-runtime-empty {
-  padding: 36px 0;
-  color: var(--text-soft);
-  text-align: center;
-}
-
 .form-instance-content {
   display: grid;
   grid-template-columns: minmax(0, 1fr) minmax(280px, 360px);
@@ -545,14 +467,6 @@
 }
 
 @media (max-width: 860px) {
-  .forms-runtime-row {
-    grid-template-columns: minmax(0, 1fr) auto;
-  }
-
-  .forms-runtime-row > span:not(.forms-runtime-row-main, .status-badge) {
-    display: none;
-  }
-
   .form-instance-content {
     grid-template-columns: 1fr;
   }