fix(review round 1): daemon PAT-header auth, job pruning, session-split batches, streaming tars, seed cleanup, ping/pong, byte caps, branch switch, slug --, ctx cancel, Init:true, pagination, latest/before events; web newest-window history + load-older, offline busy gate, staleness guards, memo store, auth probe, scroll key, focus-visible, draft restore, poll dedup; 106+181 tests, coverage 96.2%/95.1%+

web/src/SessionsView.test.tsx

@@ -61,20 +61,22 @@ describe("SessionsView", () => {
 	it("empty state message (after load window)", () => {
 		vi.useFakeTimers();
 		renderView({ sessions: [] });
-		act(() => { vi.advanceTimersByTime(700); });
+		act(() => {
+			vi.advanceTimersByTime(700);
+		});
 		expect(screen.getByText(/No active sessions/i)).toBeInTheDocument();
 		vi.useRealTimers();
 	});
 
 	it("skeleton while first load pending", () => {
 		renderView({ sessions: [] });
-		expect(screen.getByRole("heading", { name: "Active sessions" })).toBeInTheDocument();
+		expect(
+			screen.getByRole("heading", { name: "Active sessions" }),
+		).toBeInTheDocument();
 		const skel = document.querySelector(".skeleton");
 		expect(skel).not.toBeNull();
 	});
 
-
-
 	it("renders cards sorted by last activity with fallbacks", () => {
 		renderView({
 			sessions: [
@@ -181,12 +183,54 @@ describe("SessionsView", () => {
 				</Routes>
 			</MemoryRouter>,
 		);
-		fireEvent.keyDown(screen.getByRole("button", { name: "Open session s8" }), {
-			key: " ",
-		});
+		const ev = fireEvent.keyDown(
+			screen.getByRole("button", { name: "Open session s8" }),
+			{
+				key: " ",
+			},
+		);
+		expect(ev).toBe(false); // preventDefault consumed the default action
 		expect(probe).toHaveBeenCalledWith("/s/s8");
 	});
 
+	it("Space and Enter keydown are default-prevented so the page does not scroll (S8)", () => {
+		const probe = vi.fn();
+		const renderKb = (): HTMLElement => {
+			render(
+				<MemoryRouter initialEntries={["/"]}>
+					<Routes>
+						<Route
+							path="/"
+							element={
+								<SessionsView
+									sessions={[session({ id: "kb2" })]}
+									onChanged={() => undefined}
+									pushToast={() => undefined}
+								/>
+							}
+						/>
+						<Route path="/s/:id" element={<Probe onVisit={probe} />} />
+					</Routes>
+				</MemoryRouter>,
+			);
+			return screen.getByRole("button", { name: "Open session kb2" });
+		};
+		// document-level bubble listener observes the event AFTER React's
+		// delegated handler, so defaultPrevented reflects the component's call
+		const seen: boolean[] = [];
+		const rec = (e: Event): void => {
+			seen.push(e.defaultPrevented);
+		};
+		document.addEventListener("keydown", rec);
+		// Space: navigation unmounts the card, so each key gets a fresh render
+		fireEvent.keyDown(renderKb(), { key: " " });
+		fireEvent.keyDown(renderKb(), { key: "Enter" });
+		fireEvent.keyDown(renderKb(), { key: "Tab" });
+		document.removeEventListener("keydown", rec);
+		expect(seen).toEqual([true, true, false]);
+		expect(probe).toHaveBeenCalledWith("/s/kb2");
+	});
+
 	it("stop with unnamed session toasts the id", async () => {
 		seedSettings();
 		mockFetchJson(() => ({ ok: true }));