Director + Overlay Graphics + Replay Fix

Fixed:
- director.php Overlay & Graphics section now has only:
  Show Toss / Show Next Match / Hide Graphic
- Button opens popup with fixture match list.
- Overlay graphic show fixed: overlay no longer misses event due to API auto-reset.
- Toss and Next Match graphics poll reliably from api/prematch_graphics_state.php.

Replay animation added:
- assets/css/replay_animation_pack.css
- assets/js/replay_animation_pack.js
- assets/js/replay_animation_director.js
- api/replay_animation_state.php
- Director replay panel has FOUR / SIX / WICKET / REPLAY animation test buttons.
- Overlay shows full-screen replay animation.

Test:
1. Open overlay.php
2. Open director.php
3. Use Overlay & Graphics > Show Toss / Show Next Match
4. Use Replay Animation buttons