chore(api): remove unused test helpers

Remove MockDB, NewTestAPIServer, CleanupTestData, and
GetTestDBConnection — all flagged as unreachable by deadcode.

server/api/test_helpers.go

@@ -1,25 +1,12 @@
 package api
 
 import (
-	"database/sql"
 	"testing"
 
 	_config "erupe-ce/config"
 	"go.uber.org/zap"
-
-	"github.com/jmoiron/sqlx"
 )
 
-// MockDB provides a mock database for testing
-type MockDB struct {
-	QueryRowFunc    func(query string, args ...interface{}) *sql.Row
-	QueryFunc       func(query string, args ...interface{}) (*sql.Rows, error)
-	ExecFunc        func(query string, args ...interface{}) (sql.Result, error)
-	QueryRowContext func(ctx interface{}, query string, args ...interface{}) *sql.Row
-	GetContext      func(ctx interface{}, dest interface{}, query string, args ...interface{}) error
-	SelectContext   func(ctx interface{}, dest interface{}, query string, args ...interface{}) error
-}
-
 // NewTestLogger creates a logger for testing
 func NewTestLogger(t *testing.T) *zap.Logger {
 	logger, err := zap.NewDevelopment()
@@ -58,43 +45,3 @@ func NewTestConfig() *_config.Config {
 	}
 }
 
-// NewTestAPIServer creates an API server for testing with a real database
-func NewTestAPIServer(t *testing.T, db *sqlx.DB) *APIServer {
-	logger := NewTestLogger(t)
-	cfg := NewTestConfig()
-	config := &Config{
-		Logger:      logger,
-		DB:          db,
-		ErupeConfig: cfg,
-	}
-	return NewAPIServer(config)
-}
-
-// CleanupTestData removes test data from the database
-func CleanupTestData(t *testing.T, db *sqlx.DB, userID uint32) {
-	// Delete characters associated with the user
-	_, err := db.Exec("DELETE FROM characters WHERE user_id = $1", userID)
-	if err != nil {
-		t.Logf("Error cleaning up characters: %v", err)
-	}
-
-	// Delete sign sessions for the user
-	_, err = db.Exec("DELETE FROM sign_sessions WHERE user_id = $1", userID)
-	if err != nil {
-		t.Logf("Error cleaning up sign_sessions: %v", err)
-	}
-
-	// Delete the user
-	_, err = db.Exec("DELETE FROM users WHERE id = $1", userID)
-	if err != nil {
-		t.Logf("Error cleaning up users: %v", err)
-	}
-}
-
-// GetTestDBConnection returns a test database connection (requires database to be running)
-func GetTestDBConnection(t *testing.T) *sqlx.DB {
-	// This function would need to connect to a test database
-	// For now, it's a placeholder that returns nil
-	// In practice, you'd use a test database container or mock
-	return nil
-}