Remove match-panel table (mobile scroll fix)

Problem

The .match-panel table showing game slots (#2b78597c, #c9de6985, etc.) causes vertical scroll issues on mobile devices, making the game setup unusable on smaller screens.

Solution

Remove the match panel table component entirely:

• Locate Vue component rendering .match-panel
• Remove table with game slots/session display
• Ensure mobile layout no longer has vertical scroll in game setup

Acceptance Criteria

• [x] .match-panel table is removed from game setup UI
• [x] Mobile devices have no vertical scroll in game setup
• [x] Game setup flow still functions without match panel
• [x] No broken layouts on mobile/desktop

Technical Notes

• Priority fix - mobile UX blocker
• This is purely removal - no replacement component needed
• Focus on apps/web/src/components/ for Vue components

Parent: #22091