feat(mm): wait longer for a real opponent; add "start with bots now"

- server: a lone player in the online-league queue now keeps waiting (re-checking
  every 15s) up to 75s so an online opponent has a real chance to join; the moment
  a 2nd human queues they're matched together, and a full 4 still forms instantly.
  Add PlayNow hub method to force-start with bots on demand.
- client: matchmaking screen shows a "شروع با ربات / Start with bots" button after
  a few seconds so the player can skip the wait; waiting copy updated; raise the
  "connection stuck" hint threshold to 90s so it no longer fires during normal waits.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/components/screens/MatchmakingScreen.tsx

@@ -60,6 +60,15 @@ export function MatchmakingScreen() {
     go("online");
   };
 
+  // Stop waiting for an online opponent — start immediately with bots.
+  const startNow = async () => {
+    try {
+      await getService().playNow();
+    } catch {
+      /* ignore — server will still fall back to bots after the wait window */
+    }
+  };
+
   const enter = () => {
     const players = getService().getMatchPlayers();
     if (!players) return;
@@ -131,7 +140,7 @@ export function MatchmakingScreen() {
         {searching && (
           <>
             <div className="mt-2 text-3xl font-black gold-text tabular-nums">{elapsed}s</div>
-            {elapsed >= 28 ? (
+            {elapsed >= 90 ? (
               <p className="text-rose-300 text-xs mt-2 max-w-[18rem]">{t("mm.stuck")}</p>
             ) : (
               <p className="text-cream/50 text-xs mt-1 max-w-[16rem]">{t("mm.fillHint")}</p>
@@ -185,10 +194,22 @@ export function MatchmakingScreen() {
           })}
         </div>
 
-        <div className="mt-10 flex gap-3">
+        <div className="mt-10 flex flex-wrap items-center justify-center gap-3">
           <button onClick={cancel} className="press-3d glass rounded-2xl px-6 py-3 text-cream/70">
             {t("mm.cancel")}
           </button>
+          {/* After a few seconds of waiting, let the player skip the wait and
+              start against bots instead of waiting for a real opponent. */}
+          {searching && elapsed >= 5 && (
+            <motion.button
+              initial={{ scale: 0.8, opacity: 0 }}
+              animate={{ scale: 1, opacity: 1 }}
+              onClick={startNow}
+              className="press-3d btn-gold rounded-2xl px-6 py-3"
+            >
+              {t("mm.playNow")}
+            </motion.button>
+          )}
           {ready && (
             <motion.button
               initial={{ scale: 0.8, opacity: 0 }}