Add Khanegi default appearance snapshot seed and strip SA meta from get_user.

Mirrors Hamkar so each khanegi tenant can restore its factory ui-config without exposing defaultSnapshot publicly.

Co-authored-by: Cursor <cursoragent@cursor.com>

prisma/lib/appearance-builders.ts

@@ -148,7 +148,7 @@ export function buildKhanegiUiFromColors(input: {
     onAccent: '#ffffff',
   }
 
-  return {
+  const base = {
     schemaId: 'ui-config',
     version: '1.0.0',
     app: {
@@ -198,4 +198,12 @@ export function buildKhanegiUiFromColors(input: {
     pages: {},
     _backfill: 'colors-from-live-registry',
   }
+
+  return {
+    ...base,
+    defaultSnapshot: {
+      app: JSON.parse(JSON.stringify(base.app)),
+      pages: JSON.parse(JSON.stringify(base.pages || {})),
+    },
+  }
 }