Update 2025-04-24_11:44:19

static/router.js

@@ -0,0 +1,15 @@
+// static/router.js — core routing for SPA navigation
+export const Router = {
+  sections: Array.from(document.querySelectorAll("main > section")),
+  showOnly(id) {
+    this.sections.forEach(sec => {
+      sec.hidden = sec.id !== id;
+      sec.tabIndex = -1;
+    });
+    localStorage.setItem("last_page", id);
+    const target = document.getElementById(id);
+    if (target) target.focus();
+  }
+};
+
+export const showOnly = Router.showOnly.bind(Router);