Initial electronics inventory webapp

KV-store backed Express 5 app for tracking electronic components,
their arbitrary fields, and inventory locations (physical, BOM, digital).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

public/lib/dom.mjs

@@ -0,0 +1,16 @@
+export function qs(scope, selector) {
+	if (typeof scope === 'string') return document.querySelector(scope);
+	return scope.querySelector(selector);
+}
+
+export function clone(template_id) {
+	return document.getElementById(template_id).content.cloneNode(true).firstElementChild;
+}
+
+export function set_text(el, selector, text) {
+	const target = typeof selector === 'string' ? el.querySelector(selector) : selector;
+	target.textContent = text;
+}
+
+export function show(el) { el.hidden = false; }
+export function hide(el) { el.hidden = true; }