feat(design): players on touch and the C5 control set, restart on the card (E28 S3f2)

Plex player: a finger's tap on the picture only shows or hides the controls,
the hide timer starts with playback, a double-tap on a side third skips 10 s,
the seek bar is a 2.75rem touch-none hit area with its head shown on touch.
The row is play/pause, Back by position, Next only with a next item, mute,
time, tracks, a fixed ⋯ (settings, media info, stats, shortcuts, download)
and fullscreen; Stop, Restart and the ±10 s buttons are gone.

A started card shows the video card's Continue + Restart pair (one shared
MediaResumeButtons, beside the picture's button), and its menu lists the
restart; the player opens that item at 0 (fromStart). YouTube modal: the
description opens from an ⓘ, the queue arrows sit inside the screen.

frontend/src/components/Home.dom.test.tsx

@@ -712,6 +712,36 @@ describe("Home", () => {
     expect(setPage).toHaveBeenCalledWith("plex");
   });
 
+  // C5: what a tile's Play would continue, its menu can start over — the one way to on touch.
+  it("a started film's menu starts it over: the player opens from the start", async () => {
+    const movie = {
+      ...ytCard("m1", "A Film"),
+      source: "plex",
+      kind: "movie",
+      aspect: "poster",
+      position_seconds: 600,
+      video: null,
+      plex: { id: "m1", type: "movie", title: "A Film", thumb: "", position_seconds: 600 },
+    };
+    discover.mockResolvedValue({
+      budget: "any",
+      hero: null,
+      continue_watching: [movie],
+      comfort: [],
+    });
+    mount();
+    fireEvent.click((await screen.findAllByRole("button", { name: "card.menu.more" }))[0]!);
+    const restart = screen
+      .getAllByRole("menuitem", { hidden: true })
+      .find((b) => b.textContent === "card.restartTitle");
+    fireEvent.click(restart!);
+    await waitFor(() =>
+      expect(setJumpTo).toHaveBeenCalledWith(
+        expect.objectContaining({ id: "m1", type: "play", fromStart: true }),
+      ),
+    );
+  });
+
   it("rotates the tier on each press so the button offers a different KIND of answer", async () => {
     // Measured 2026-09-06: exclusion alone left it walking the resume rail and cycling nine cards,
     // never once reaching the shelf. The press count travels to the server as the rotation.