feat: expose showDebugPanel API and add panel toggle method

website/scripts/DebugPanel.js

@@ -201,6 +201,11 @@ export class DebugPanel {
     /** @returns {string | null} */
     get lastActiveId() { return this.#lastActiveId; }
 
+    /** Expands the debug panel if it is collapsed. */
+    show() {
+        this.#panel.classList.remove("collapsed");
+    }
+
     /**
      * Sets the draggable checkbox to the given value without firing the change callback.
      *