Replace distribution JSON editor with form UI

admin/public/styles.css

@@ -376,12 +376,30 @@ textarea {
     background: #111412;
     box-shadow: var(--shadow);
     pointer-events: auto;
+    overflow-y: auto;
 }
 
 #distributionEditorStatus {
     margin-top: -4px;
 }
 
+.distributionSummary {
+    padding-bottom: 16px;
+}
+
+.distributionSummaryValue {
+    width: 100%;
+    padding: 14px 16px;
+    border: 1px solid rgba(255, 255, 255, 0.12);
+    border-radius: 14px;
+    background: var(--panel-strong);
+    color: var(--text);
+}
+
+.distributionEditorForm {
+    gap: 16px;
+}
+
 .modalHeader {
     display: flex;
     justify-content: space-between;