fix: restore post-v1.1.14 features while preserving asset updates

Undo the full-tree rollback in 6ea1b3d and restore the pre-rollback v1.2.0 code. Preserve the new asset flow rules, abnormal inventory separation, range drilldowns and date picker; adapt the regression test to the restored routes layout.

src/modules/energy/hydrogen/common/phone-viewport.ts

@@ -0,0 +1,8 @@
+/** UA-based phone detection intentionally excludes iPad and Android tablets. */
+export function isPhoneUserAgent(ua: string): boolean {
+  return /iPhone|iPod|Windows Phone/i.test(ua) || (/Android/i.test(ua) && /Mobile/i.test(ua));
+}
+
+export function phoneRotation(ua: string, width: number, height: number): boolean {
+  return isPhoneUserAgent(ua) && height > width;
+}