Fix VDOM diffing race condition between innerHTML and textContent

This ticket addresses a severe race condition and delta payload bloat in the VDOM diffing engine (src/vdom/Helper.mjs) when transitioning between innerHTML and textContent states.

The Problem: When a cell component (like in the DevIndex Grid) is recycled, it might switch from using innerHTML to textContent (or vice versa), or simply be cleared out. The previous logic in Helper.compareAttributes handled these properties generically:

case 'innerHTML':
case 'textContent':
    if (value !== oldVnode[prop]) {
        delta[prop] = value
    }

If a new VNode used textContent: "new" and the old one had innerHTML: "old", the engine would generate: { innerHTML: undefined, textContent: "new" }

When processed by DeltaUpdates.updateNode(delta), the for...in loop iteration order is not guaranteed. If innerHTML: undefined (which evaluates to node.innerHTML = '') executes after node.textContent = "new", the DOM node is incorrectly wiped blank. Furthermore, sending undefined over the wire wastes bandwidth.

The Fix: Separate innerHTML and textContent into their own evaluation blocks within compareAttributes. Implement mutual exclusivity checks:

1. If removing innerHTML (it is undefined), but the new VNode has textContent, do not send an innerHTML delta. Setting textContent on the DOM naturally overwrites the old innerHTML.
2. Conversely, if removing textContent but adding innerHTML, skip the textContent clear delta.
3. If both are genuinely removed, explicitly normalize the delta to innerHTML: '' rather than sending undefined.