fix(lit-components): fix rendering and interaction issues in force-graph, html-table, and draggable-dom

- lit-force-graph: Refactored for instance reuse, better lifecycle management, and added dynamic imports for AR/VR modes.
- lit-html-table: Improved visual design, readability of headers, and fixed reactivity in editable mode.
- lit-draggable-dom: Fixed clipping issues by switching to relative/absolute positioning and resolved a panning speed bug caused by CSS variable inheritance.

lit-components/lit-html-editor/html-editor.test.ts

@@ -0,0 +1,19 @@
+import { describe, expect, test } from "vitest";
+import "./components/rich-text";
+import "./components/rich-viewer";
+
+describe("Lit HTML Editor Components", () => {
+  test("registers rich markdown/HTML custom elements successfully", () => {
+    expect(customElements.get("rich-text")).toBeDefined();
+    expect(customElements.get("rich-viewer")).toBeDefined();
+  });
+
+  test("mounts rich-viewer correctly and accepts markdown content", async () => {
+    document.body.innerHTML = '<rich-viewer value="# Hello World"></rich-viewer>';
+    await window.happyDOM.whenAsyncComplete();
+
+    const element = document.body.querySelector("rich-viewer");
+    expect(element).toBeDefined();
+    expect(element?.getAttribute("value")).toBe("# Hello World");
+  });
+});