snapshot: unify shared admin editor components

backend/workflows/static/workflows/css/design_system.css

@@ -165,6 +165,26 @@ body {
   gap: 14px;
 }
 
+.app-editor-shell {
+  display: grid;
+  grid-template-columns: 260px minmax(0, 1fr);
+  gap: 18px;
+  align-items: start;
+}
+
+.app-editor-sidebar {
+  position: sticky;
+  top: 18px;
+  display: grid;
+  gap: 14px;
+}
+
+.app-editor-main {
+  min-width: 0;
+  display: grid;
+  gap: 14px;
+}
+
 .app-sidebar-card {
   padding: 16px;
   border: 1px solid rgba(216, 226, 239, 0.94);
@@ -252,6 +272,32 @@ body {
   gap: 12px;
 }
 
+.app-stat-grid {
+  display: grid;
+  gap: 12px;
+}
+
+.app-stat-card {
+  display: grid;
+  gap: 2px;
+  padding: 14px;
+  border: 1px solid rgba(216, 226, 239, 0.94);
+  border-radius: 16px;
+  background: linear-gradient(180deg, #fbfdff, #ffffff);
+}
+
+.app-stat-card strong {
+  font-size: 22px;
+  line-height: 1;
+  color: #163566;
+}
+
+.app-stat-card span {
+  color: var(--ds-muted);
+  font-size: 12px;
+  font-weight: 700;
+}
+
 .app-side-stat {
   display: grid;
   gap: 2px;
@@ -409,6 +455,33 @@ table th {
   flex-wrap: wrap;
 }
 
+.app-action-row {
+  margin-top: 12px;
+  display: flex;
+  gap: 10px;
+  align-items: center;
+  justify-content: space-between;
+  flex-wrap: wrap;
+}
+
+.app-action-row.is-sticky {
+  position: sticky;
+  bottom: 14px;
+  z-index: 4;
+  padding-top: 12px;
+  border-top: 1px solid #dbe5f2;
+  background: linear-gradient(180deg, rgba(255,255,255,0.92), rgba(255,255,255,0.98));
+}
+
+.app-note-row {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  gap: 10px;
+  flex-wrap: wrap;
+  margin-top: 18px;
+}
+
 .app-module-link,
 .tab {
   display: inline-flex;
@@ -499,6 +572,19 @@ table th {
   .page-stack {
     padding: 18px;
   }
+
+  .app-editor-shell {
+    grid-template-columns: 1fr;
+  }
+
+  .app-editor-sidebar {
+    position: static;
+  }
+
+  .app-action-row {
+    align-items: stretch;
+    flex-direction: column;
+  }
 }
 
 @media (max-width: 760px) {