UI: tab-bar navigation — drop the hamburger

Replace Menu.svelte (hamburger) everywhere with tab-bar navigation:
- Settings hub (SettingsHub) from the lobby ⚙️ tab: Settings/Profile/
  Friends/About as in-place tabs, back → lobby; the lobby ⚙️ badge counts
  incoming friend requests (invitations keep their own lobby section).
- Comms hub (CommsHub) from the move-history 💬: Chat/Dictionary tabs,
  back → game; Dictionary only while the game is active.
- Game menu items relocate into the open history: 🏁 leave / 📤 export in
  the header, 🤝 add-friend per opponent card, 💬 comms; unread chat is
  badged on the score bar + the 💬.
- TapConfirm (tap → fading ✅ → tap) replaces the Skip/Hint press-and-hold
  popovers and drives the add-friend confirm.
- Fix the move-history "jump": the slid board is inert and the stage can't
  scroll, so a swipe up genuinely closes the history.

Remove Menu.svelte + HoldConfirm.svelte. Docs: UI_DESIGN, FUNCTIONAL(+ru),
PRERELEASE. UI check/unit/build/bundle/e2e (Chromium+WebKit) all green.

ui/src/game/Game.svelte

@@ -1,9 +1,8 @@
 <script lang="ts">
   import { onDestroy, onMount } from 'svelte';
   import Screen from '../components/Screen.svelte';
-  import Menu from '../components/Menu.svelte';
   import TabBar from '../components/TabBar.svelte';
-  import HoldConfirm from '../components/HoldConfirm.svelte';
+  import TapConfirm from '../components/TapConfirm.svelte';
   import Modal from '../components/Modal.svelte';
   import Board from './Board.svelte';
   import Rack from './Rack.svelte';
@@ -612,13 +611,46 @@
     }
   }
 
-  // Friend state for the in-game "add to friends" item, derived from the server so it is
-  // correct across reloads and live-updates when a request is answered:
-  // `friends` are the caller's accepted friends; `requested` are the addressees already
-  // requested (pending or declined — both block a re-send and read as "request sent").
+  // --- move history: open by tapping the score bar, close by tapping or swiping up the board ---
+  // While the history is open the board is inert (CSS pointer-events), so the whole slid board
+  // reads as a "tap or swipe up to close" surface and the stage cannot scroll instead of close.
+  // The tap closes on click; the swipe closes as soon as enough upward travel is seen, so it
+  // never depends on where a fast swipe's pointerup lands (which differs across engines).
+  // Closing genuinely clears `historyOpen` (rather than only scrolling the slid board out of
+  // view, which left a stale-open state that made a follow-up score-bar tap "jump" the board).
+  let histSwipeY: number | null = null;
+  function toggleHistory() {
+    historyOpen = !historyOpen;
+  }
+  function closeHistoryByGesture() {
+    if (!historyOpen) return;
+    historyOpen = false;
+    histSwipeY = null;
+    // Swallow the click some browsers synthesise from a board tap, so it does not place a tile.
+    swallowClick = true;
+    setTimeout(() => (swallowClick = false), 120);
+  }
+  function onBoardWrapDown(e: PointerEvent) {
+    histSwipeY = historyOpen ? e.clientY : null;
+  }
+  function onBoardWrapMove(e: PointerEvent) {
+    if (histSwipeY !== null && histSwipeY - e.clientY > 32) closeHistoryByGesture();
+  }
+  // A closed history clears every per-seat add-friend confirmation.
+  $effect(() => {
+    if (!historyOpen) addConfirm = {};
+  });
+
+  // Friend state for the in-game "add friend" affordance (the 🤝 in each opponent's score
+  // card while the history is open), derived from the server so it is correct across reloads
+  // and live-updates when a request is answered: `friends` are the caller's accepted friends;
+  // `requested` are the addressees already requested (pending or declined — both block a
+  // re-send and disable the 🤝).
   let friends = $state(new Set<string>());
   let requested = $state(new Set<string>());
-  const noop = () => {};
+  // Per-seat "confirming" flag for the 🤝 → ✅ tap-to-confirm (TapConfirm writes it); while
+  // set, that seat's card shows "Add friend?" in place of the score. Reset when history closes.
+  let addConfirm = $state<Record<number, boolean>>({});
 
   // loadFriends refreshes the friend/outgoing sets for a non-guest; guests have no social
   // surfaces, so the sets stay empty. Best-effort — a failure leaves the previous sets.
@@ -643,50 +675,52 @@
     }
   }
 
-  const opponents = $derived(
-    view ? view.game.seats.filter((s) => s.accountId !== app.session?.userId) : [],
-  );
-
-  // In a finished game the menu drops Check word and Drop game, gains Export GCG, and
-  // an "add to friends" item flips to a disabled "request sent" once tapped.
-  const menuItems = $derived([
-    { label: t('game.history'), onclick: () => (historyOpen = true) },
-    { label: t('game.chat'), onclick: () => navigate(`/game/${id}/chat`), badge: app.chatUnread[id] ?? 0 },
-    ...(gameOver ? [] : [{ label: t('game.checkWord'), onclick: () => navigate(`/game/${id}/check`) }]),
-    ...(view?.game.status === 'finished' ? [{ label: t('game.exportGcg'), onclick: exportGcg }] : []),
-    ...(!app.profile?.isGuest
-      ? opponents.map((s) =>
-          friends.has(s.accountId)
-            ? { label: t('game.alreadyFriends'), onclick: noop, disabled: true }
-            : requested.has(s.accountId)
-              ? { label: t('game.requestSent'), onclick: noop, disabled: true }
-              : { label: `${t('friends.addFromGame')}: ${s.displayName}`, onclick: () => addFriend(s.accountId) },
-        )
-      : []),
-    ...(gameOver ? [] : [{ label: t('game.dropGame'), onclick: () => (resignOpen = true) }]),
-  ]);
+  // canAddFriend reports whether a seat shows the 🤝: a non-guest viewing an opponent who is
+  // not yet a friend (an already-requested opponent still shows it, but disabled).
+  function canAddFriend(accountId: string): boolean {
+    return !app.profile?.isGuest && accountId !== app.session?.userId && !friends.has(accountId);
+  }
 </script>
 
 <Screen title={t(variantNameKey(variant))} back="/" growNav column scroll={false}>
-  {#snippet menu()}
-    <Menu items={menuItems} badge={app.chatUnread[id] ?? 0} />
-  {/snippet}
-
   {#if view}
     <!-- svelte-ignore a11y_no_static_element_interactions -->
     <!-- svelte-ignore a11y_click_events_have_key_events -->
-    <div class="scoreboard" onclick={() => (historyOpen = !historyOpen)}>
+    <div class="scoreboard" onclick={toggleHistory}>
+      {#if (app.chatUnread[id] ?? 0) > 0}<span class="cbadge sbadge">{app.chatUnread[id]}</span>{/if}
       {#each view.game.seats as s (s.seat)}
         <div class="seat" class:turn={view.game.toMove === s.seat && !gameOver} class:win={s.isWinner}>
           <div class="nm">{s.accountId === app.session?.userId ? t('common.you') : s.displayName}</div>
-          <div class="sc">{s.score}</div>
+          <div class="sc">{addConfirm[s.seat] ? t('game.addFriendShort') : s.score}</div>
+          {#if historyOpen && canAddFriend(s.accountId)}
+            <span class="addfriend">
+              <TapConfirm
+                label={t('friends.addFromGame')}
+                disabled={requested.has(s.accountId)}
+                onConfirming={(v) => (addConfirm[s.seat] = v)}
+                onconfirm={() => addFriend(s.accountId)}
+              >
+                <span class="fico">🤝</span>
+              </TapConfirm>
+            </span>
+          {/if}
         </div>
       {/each}
     </div>
 
-    <div class="stage">
+    <div class="stage" class:histopen={historyOpen}>
       {#if historyOpen}
         <div class="history">
+          <div class="hhead">
+            {#if gameOver}
+              <button class="hicon" onclick={exportGcg} aria-label={t('game.exportGcg')}>📤</button>
+            {:else}
+              <button class="hicon" onclick={() => (resignOpen = true)} aria-label={t('game.dropGame')}>🏁</button>
+            {/if}
+            <button class="hicon" onclick={() => navigate(`/game/${id}/chat`)} aria-label={t('game.chat')}>
+              💬{#if (app.chatUnread[id] ?? 0) > 0}<span class="cbadge">{app.chatUnread[id]}</span>{/if}
+            </button>
+          </div>
           <ol>
             {#each moves as m, i (i)}
               <li>
@@ -705,7 +739,10 @@
       <div
         class="boardwrap"
         class:slid={historyOpen}
-        onclick={() => historyOpen && (historyOpen = false)}
+        onpointerdown={onBoardWrapDown}
+        onpointermove={onBoardWrapMove}
+        onpointerup={() => (histSwipeY = null)}
+        onclick={closeHistoryByGesture}
       >
         <Board
           {board}
@@ -769,17 +806,18 @@
         <button class="tab" disabled={busy || !isMyTurn || !connection.online || bagEmpty} onclick={openExchange}>
           <span class="sq">🔄</span><span class="lbl">{t('game.draw')}</span>
         </button>
-        <HoldConfirm triggerClass="tab" disabled={busy || !isMyTurn || !connection.online} onhold={doPass}>
-          {#snippet trigger()}<span class="sq">🥺</span><span class="lbl">{t('game.skip')}</span>{/snippet}
-          {#snippet popover(close)}<button class="pop go" onclick={() => { close(); doPass(); }}>{t('game.confirm')} ✅</button>{/snippet}
-        </HoldConfirm>
-        <HoldConfirm triggerClass="tab" disabled={busy || !isMyTurn || !connection.online || (view?.hintsRemaining ?? 0) <= 0} onhold={doHint}>
-          {#snippet trigger()}
-            <span class="sq">🛟{#if (view?.hintsRemaining ?? 0) > 0}<span class="badge">{view?.hintsRemaining}</span>{/if}</span>
-            <span class="lbl">{t('game.hint')}</span>
-          {/snippet}
-          {#snippet popover(close)}<button class="pop go" onclick={() => { close(); doHint(); }}>{t('game.confirm')} ✅</button>{/snippet}
-        </HoldConfirm>
+        <TapConfirm triggerClass="tab" label={t('game.skip')} disabled={busy || !isMyTurn || !connection.online} onconfirm={doPass}>
+          <span class="sq">🥺</span><span class="lbl">{t('game.skip')}</span>
+        </TapConfirm>
+        <TapConfirm
+          triggerClass="tab"
+          label={t('game.hint')}
+          disabled={busy || !isMyTurn || !connection.online || (view?.hintsRemaining ?? 0) <= 0}
+          onconfirm={doHint}
+        >
+          <span class="sq">🛟{#if (view?.hintsRemaining ?? 0) > 0}<span class="badge">{view?.hintsRemaining}</span>{/if}</span>
+          <span class="lbl">{t('game.hint')}</span>
+        </TapConfirm>
         {#if placement.pending.length > 0}
           <button class="tab" disabled={busy} onclick={resetPlacement}>
             <span class="sq">↩️</span><span class="lbl">{t('game.reset')}</span>
@@ -836,6 +874,7 @@
 
 <style>
   .scoreboard {
+    position: relative;
     display: flex;
     flex: none;
     gap: 6px;
@@ -844,6 +883,7 @@
     cursor: pointer;
   }
   .seat {
+    position: relative;
     flex: 1;
     text-align: center;
     padding: 5px 4px;
@@ -891,6 +931,11 @@
     overflow-y: auto;
     overflow-x: hidden;
   }
+  /* While the history is open the stage must not scroll — a swipe up on the board closes
+     the panel instead of scrolling the slid board out from under it. */
+  .stage.histopen {
+    overflow: hidden;
+  }
   .history {
     position: absolute;
     inset: 0 0 auto 0;
@@ -947,6 +992,10 @@
   .boardwrap.slid {
     transform: translateY(62%);
   }
+  /* The slid board is inert: the whole surface reads as "tap or swipe up to close". */
+  .boardwrap.slid :global(.viewport) {
+    pointer-events: none;
+  }
   .status {
     display: flex;
     flex: none;
@@ -998,22 +1047,47 @@
   .make:disabled {
     opacity: 0.4;
   }
-  .pop {
-    padding: 9px 14px;
-    border: none;
-    background: none;
-    color: var(--text);
-    border-radius: var(--radius-sm);
-    font-weight: 500;
-    text-align: left;
-  }
-  .pop:hover {
+  /* The move-history header: leave (active) / export (finished) on the left, comms on the
+     right, icon-only. Sticky so it stays atop the scrolling move list. */
+  .hhead {
+    position: sticky;
+    top: 0;
+    z-index: 1;
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    padding: 4px 8px;
     background: var(--surface-2);
+    border-bottom: 1px solid var(--border);
   }
-  .badge {
+  .hicon {
+    position: relative;
+    background: none;
+    border: none;
+    color: var(--text);
+    font-size: 1.3rem;
+    line-height: 1;
+    padding: 4px 8px;
+    border-radius: var(--radius-sm);
+  }
+  .hicon:active {
+    background: var(--bg-elev);
+  }
+  /* The 🤝 add-friend control: pinned to the seat's right edge so the centred name and
+     score never shift; the TapConfirm inside swaps it for a fading ✅ on tap. */
+  .addfriend {
+    position: absolute;
+    right: 2px;
+    top: 50%;
+    transform: translateY(-50%);
+    font-size: 1.15rem;
+  }
+  .fico {
+    line-height: 1;
+  }
+  /* The unread-chat count: on the score bar's corner and on the history's 💬 icon. */
+  .cbadge {
     position: absolute;
-    top: -3px;
-    right: -3px;
     font-size: 0.68rem;
     font-weight: 700;
     background: var(--accent);
@@ -1024,6 +1098,14 @@
     line-height: 1.4;
     text-align: center;
   }
+  .sbadge {
+    top: 2px;
+    right: 4px;
+  }
+  .hicon .cbadge {
+    top: -1px;
+    right: -1px;
+  }
   .loading {
     text-align: center;
     color: var(--text-muted);