Visual improvements to debug mode for better information visibility

tests/architecture.test.cjs

@@ -31,7 +31,7 @@ test("every source belongs to an explicit runtime composition, with no duplicate
       }
     }
   }
-  assert.deepEqual(sources.content.filter(file => sources.background.includes(file)), ["src/shared/messages.js"]);
+  assert.deepEqual(sources.content.filter(file => sources.background.includes(file)), ["src/shared/messages.js", "src/shared/debug-body.js"]);
 });
 
 test("Redwood cascade is byte-identical to the characterized original", () => {