frontend: preview

frontend/src/styles.css

@@ -173,6 +173,89 @@ button.icon-button.ghost:hover:not([disabled]) {
   overflow: hidden;
 }
 
+.preview-main {
+  flex: 1;
+  display: flex;
+  flex-direction: column;
+  padding: 0.75rem 1.5rem 1.25rem;
+  min-height: 0;
+  overflow: hidden;
+}
+
+.preview-workspace {
+  flex: 1;
+  display: flex;
+  flex-direction: column;
+  gap: 0.75rem;
+  min-height: 0;
+}
+
+.preview-workspace__header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 1rem;
+}
+
+.preview-workspace__meta {
+  display: flex;
+  align-items: center;
+  gap: 0.75rem;
+}
+
+.preview-workspace__meta h2 {
+  margin: 0;
+  font-size: 1.1rem;
+}
+
+.preview-workspace__meta .meta {
+  display: block;
+  font-size: 0.8rem;
+  color: var(--muted);
+}
+
+.preview-workspace__actions {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+}
+
+.preview-workspace__body {
+  flex: 1;
+  background: var(--surface-subtle);
+  border: 1px solid var(--border);
+  border-radius: 2px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  overflow: hidden;
+}
+
+.preview-workspace__object {
+  width: 100%;
+  height: 100%;
+  border: none;
+}
+
+.preview-workspace__message {
+  color: var(--muted);
+  font-size: 0.95rem;
+}
+
+.preview-workspace__metadata {
+  border: 1px solid var(--border);
+  border-radius: 2px;
+  padding: 0.75rem;
+  background: var(--surface);
+  max-height: 180px;
+  overflow: auto;
+}
+
+.preview-workspace__metadata h3 {
+  margin: 0 0 0.5rem;
+  font-size: 0.9rem;
+}
+
 .column {
   background: transparent;
   border: none;
@@ -381,8 +464,8 @@ button.icon-button.ghost:hover:not([disabled]) {
   width: 36px;
   height: 48px;
   object-fit: cover;
-  border-radius: 0;
-  box-shadow: none;
+  border-radius: 3px;
+  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
 }
 
 .thumb-placeholder {
@@ -526,6 +609,25 @@ button.icon-button.ghost:hover:not([disabled]) {
   margin: 0.6rem 0;
 }
 
+.preview-pane {
+  margin-top: 0.4rem;
+  border: 1px solid var(--border);
+  border-radius: 2px;
+  background: var(--surface-subtle);
+  min-height: 220px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  overflow: hidden;
+}
+
+.preview-object {
+  width: 100%;
+  height: 320px;
+  border: none;
+  background: var(--surface);
+}
+
 .thumbnail-preview {
   display: flex;
   flex-direction: column;