feat: enhance match entry form with validation and data

Add improved match entry form with player selection validation and
better user experience for recording match results.

Changes:
- Add player validation to prevent same player on both teams
- Add team score validation (must have winner)
- Improve form layout and player selection UI
- Add helper methods for player lookup and team building

app/actions/admin/matches/new.rb

@@ -5,11 +5,30 @@ module EuchreCamp
     module Admin
       module Matches
         class New < EuchreCamp::Action
-          include Deps[repo: 'repositories.players']
+          include Deps[
+            players_repo: 'repositories.players',
+            events_repo: 'repositories.events',
+            teams_repo: 'repositories.teams'
+          ]
 
-          def handle(_request, response)
-            players = repo.all
-            response.render(view, players: players)
+          def handle(request, response)
+            players = players_repo.all
+            tournament = nil
+            teams = []
+
+            # Check if creating match for specific tournament
+            if request.params[:event_id]
+              tournament = events_repo.by_id(request.params[:event_id])
+              teams = teams_repo.by_event(tournament[:id])
+            end
+
+            response.render(view,
+              players: players,
+              tournament: tournament,
+              teams: teams,
+              preselected_team_1: request.params[:team_1_id]&.to_i,
+              preselected_team_2: request.params[:team_2_id]&.to_i
+            )
           end
         end
       end