fix(admin): style cmdk components to resolve broken dropdown visuals

- Added global styles for [cmdk-root], [cmdk-list], [cmdk-item]
- Forced white background and border for [data-radix-popper-content-wrapper]
- Fixed missing styles that caused transparent/transparent dropdowns

admin-spa/src/index.css

@@ -134,6 +134,72 @@
   box-shadow: none !important;
 }
 
+/* Fix cmdk/command styles that might be missing */
+[cmdk-root] {
+  max-width: 100%;
+  width: 100%;
+  background-color: transparent;
+}
+
+[cmdk-list] {
+  min-height: 100px;
+  /* Ensure non-empty look */
+  max-height: 300px;
+  overflow: auto;
+  overscroll-behavior: contain;
+  transition: 100ms ease;
+  padding: 4px;
+}
+
+[cmdk-item] {
+  content-visibility: auto;
+  cursor: pointer;
+  border-radius: 4px;
+  font-size: 14px;
+  padding: 8px 12px;
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  color: var(--popover-foreground);
+  user-select: none;
+  will-change: background, color;
+  transition: all 150ms ease;
+}
+
+[cmdk-item][data-selected="true"] {
+  background: var(--accent);
+  color: var(--accent-foreground);
+}
+
+[cmdk-item][data-disabled="true"] {
+  color: var(--muted-foreground);
+  cursor: not-allowed;
+  opacity: 0.5;
+}
+
+[cmdk-empty] {
+  font-size: 14px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  height: 64px;
+  white-space: pre-wrap;
+  color: var(--muted-foreground);
+}
+
+/* Ensure SearchableSelect PopoverContent has proper background */
+[data-radix-popper-content-wrapper] .bg-popover {
+  background-color: white !important;
+  /* Force white background for popovers */
+  border: 1px solid #e2e8f0;
+  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
+}
+
+.dark [data-radix-popper-content-wrapper] .bg-popover {
+  background-color: #1f2937 !important;
+  border-color: #374151;
+}
+
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