fix(js): reload stale popstate partials

When back/forward navigation receives an incompatible or unusable partial response, reload the current URL instead of leaving the previous UI stale.

req: page_swap/005

req: page_swap/006

req: runtime/004

slhx-js/runtime/slhx.js

@@ -180,8 +180,9 @@
       headers: { "X-SLHX-Partial": "1", "Accept": "text/html" },
       credentials: "same-origin",
     });
-    if (!await applyResponse(response, root) && mode !== "none") {
-      location.href = href;
+    if (!await applyResponse(response, root)) {
+      if (mode === "none") location.reload();
+      else location.href = href;
       return;
     }
     if (mode === "push") history.pushState({ slhx: true }, "", href);