Fix right-click freeze: trigger on mousedown button 2 (contextmenu is unreliable under pointer lock)

ddiff --git a/public/js/main.js b/public/js/main.js
iindex 277f00f..5f7dd54 100644
---- a/public/js/main.js
++++ b/public/js/main.js
@@@ -1342,21 +1342,32 @@ function start(token, user) {
      pgState.lmb = false;
      if (pgState.held) physgunRelease();
    });
++  // gmod: right-click freezes the held prop right where it is. Under pointer
++  // lock the reliable signal is mousedown button 2 — the contextmenu event
++  // doesn't fire consistently while locked.
++  function freezeHeld() {
++    if (!pgEquipped() || !pgState.held || pgState.held.isCar) return;
++    const now2 = performance.now();
++    if (now2 - (freezeHeld._t || 0) < 150) return; // both events may arrive
++    freezeHeld._t = now2;
++    const held = pgState.held;
++    const b = held.body;
++    const fp = [+b.position.x.toFixed(2), +b.position.y.toFixed(2), +b.position.z.toFixed(2)];
++    const fq = [+b.quaternion.x.toFixed(3), +b.quaternion.y.toFixed(3), +b.quaternion.z.toFixed(3), +b.quaternion.w.toFixed(3)];
++    physgunRelease(false);
++    pgState.lmb = false; // fresh click required — no instant re-grab
++    phys.setFrozen(held, true);
++    net.send({ t: 'prop', op: 'freeze', id: held.id, frozen: true, p: fp, q: fq });
++    toast('🧊 Frozen in place — physgun-grab it to move it again.');
++    beep(1150, .07, 'sine', .1);
++  }
++  addEventListener('mousedown', (e) => {
++    if (e.button === 2 && input.locked) { e.preventDefault(); freezeHeld(); }
++  });
    addEventListener('contextmenu', (e) => {
      if (!input.locked) return;
--    e.preventDefault();
--    if (pgEquipped() && pgState.held && !pgState.held.isCar) { // gmod: right-click freezes it right there
--      const held = pgState.held;
--      const b = held.body;
--      const fp = [+b.position.x.toFixed(2), +b.position.y.toFixed(2), +b.position.z.toFixed(2)];
--      const fq = [+b.quaternion.x.toFixed(3), +b.quaternion.y.toFixed(3), +b.quaternion.z.toFixed(3), +b.quaternion.w.toFixed(3)];
--      physgunRelease(false);
--      pgState.lmb = false; // fresh click required — no instant re-grab
--      phys.setFrozen(held, true);
--      net.send({ t: 'prop', op: 'freeze', id: held.id, frozen: true, p: fp, q: fq });
--      toast('🧊 Frozen in place — physgun-grab it to move it again.');
--      beep(1150, .07, 'sine', .1);
--    }
++    e.preventDefault(); // no browser menu in-game; freeze fallback for odd setups
++    freezeHeld();
    });
  
    // beams: one for me, plus one per prop another player is holding