refactor: rename stuttering exported types in game and tournament packages

Fix golangci-lint revive warnings by removing package name prefixes:
- game.GameHubInterface → game.HubInterface
- game.GameDetail → game.Detail
- tournament.TournamentEntry → tournament.Entry
- tournament.TournamentMatch → tournament.Match
- tournament.TournamentBracket → tournament.Bracket
- tournament.TournamentEditData → tournament.EditData

Also fix gofmt alignment in api/convert.go and gosimple S1016 in
game/service.go.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

2 files changed, 6 insertions, 6 deletions

diff --git a/backend/api/convert.go b/backend/api/convert.go
index f05f3bf..dec734a 100644
--- a/backend/api/convert.go
+++ b/backend/api/convert.go
@@ -18,7 +18,7 @@ func toAPIUser(p game.Player) User {
 	}
 }
 
-func toAPIGame(g game.GameDetail) Game {
+func toAPIGame(g game.Detail) Game {
 	var startedAt *int64
 	if g.StartedAt != nil {
 		ts := g.StartedAt.Unix()
@@ -75,10 +75,10 @@ func toAPIRankingEntry(r game.RankingEntry) RankingEntry {
 		code = nullable.NewNullNullable[string]()
 	}
 	return RankingEntry{
-		Player: toAPIUser(r.Player),
-		Score:  r.Score,
+		Player:      toAPIUser(r.Player),
+		Score:       r.Score,
 		SubmittedAt: r.SubmittedAt,
-		Code:   code,
+		Code:        code,
 	}
 }
 
@@ -112,7 +112,7 @@ func toAPITournamentPlayerPtr(p *tournament.Player) *User {
 	return &u
 }
 
-func toAPITournament(t tournament.TournamentBracket) Tournament {
+func toAPITournament(t tournament.Bracket) Tournament {
 	entries := make([]TournamentEntry, len(t.Entries))
 	for i, e := range t.Entries {
 		entries[i] = TournamentEntry{
diff --git a/backend/api/handler_test.go b/backend/api/handler_test.go
index a4e08dc..2dcde29 100644
--- a/backend/api/handler_test.go
+++ b/backend/api/handler_test.go
@@ -132,7 +132,7 @@ func (m *mockTxManager) RunInTx(_ context.Context, fn func(q db.Querier) error)
 	return fn(&mockQuerier{})
 }
 
-// mockGameHub implements game.GameHubInterface for testing.
+// mockGameHub implements game.HubInterface for testing.
 type mockGameHub struct {
 	calcCodeSizeResult int
 	enqueueErr         error