fix(nav): the address follows the view through overlays, reloads and Back (review round 1)

- A URL mirror names the view again on every entry Back or Forward lands on, so a change made
  under a dialog, a drawer or a sub-view is not undone by the next reload.
- A view pushed from the entry a reload under a dialog started from no longer inherits its overlay
  mark; a reload under two overlays closes onto the page in one step.
- The linked player reopens over a live search, gives itself up when its list moves first, and
  plays alone over an emptied playlist; a capped Files list keeps the link it cannot resolve.
- The Feed press over a channel ends the search; leaving a search ends its asked mark; Files and
  Playlists searches end with their page; the feed always names its view and debounces its search.
- Search-box keys are declared per module and kept out of the client log below TRACE.
- Writers outside lib/ go through codecs; the URL contract scans computed keys, overlay writers and
  two-line reads, and holds every page to a bookmark round trip (Config, Activity, Playlists and the
  Files sort and viewer added).

frontend/src/lib/logHooks.dom.test.ts

@@ -10,9 +10,12 @@ import { installClientLog } from "./logHooks";
 const appCopy = (text: string | null) =>
   ["Refresh", "Frissítés"].includes(text?.trim() ?? "") ? "Refresh" : null;
 
+// The pages' search boxes' keys, as main.tsx hands them over from the module definitions.
+const TYPED = ["fq", "yt"];
+
 beforeAll(() => {
-  installClientLog(appCopy);
-  installClientLog(appCopy); // a hot reload's second call must not wrap History twice
+  installClientLog(appCopy, TYPED);
+  installClientLog(appCopy, TYPED); // a hot reload's second call must not wrap History twice
   expect(events().map((e) => e.event)).toEqual(["app.start", "nav.view"]);
   clear();
 });
@@ -56,6 +59,17 @@ describe("client log hooks", () => {
     });
   });
 
+  it("keeps a page's own search box out below TRACE too", () => {
+    setLevel("DEBUG");
+    window.history.pushState({ sfPage: "files" }, "", "/?folder=all&fq=private+words&yt=lofi");
+    expect(views()[0]!.attrs!.values).toEqual({ folder: "all" });
+    expect(JSON.stringify(views())).not.toContain("private");
+
+    setLevel("TRACE");
+    window.history.pushState({ sfPage: "files" }, "", "/?folder=all&fq=private+words");
+    expect(views()[1]!.attrs!.values).toEqual({ folder: "all", fq: "private words" });
+  });
+
   it("records an overlay opening as a view of its own, and Back as a pop", () => {
     window.history.pushState({ sfPage: "feed", _ov: 1 }, "");
     // What Back does: the browser restores the previous entry's state (the unwrapped prototype