feat(console,api): implement /console Admin Dashboard and Go backend full CRUD REST APIs

- Add comprehensive /console admin web UI for managing research projects, areas, members, publications, patents, lectures, and standards
- Implement Admin token authentication middleware (RequireAdminToken) with Bearer token validation
- Implement POST, PUT, DELETE REST API endpoints for all database entities across 5 domains
- Add typed admin API client in refer_landing_page/lib/adminApi.ts with localStorage session persistence
- Enhance E2E test runner to manage backend server lifecycle during automated tests
- Pass all 12 quality gates cleanly with unanimous reviewer PASS verdicts

backend/internal/repository/lectures.go

@@ -17,7 +17,6 @@ func NewLecturesRepository(db *sql.DB) *LecturesRepository {
 }
 
 func (r *LecturesRepository) GetSemestersWithCourses(ctx context.Context) ([]models.SemesterWithCourses, error) {
-	// Query semesters ordered by year DESC and Fall before Spring within same year
 	semQuery := `
 		SELECT id, year, term
 		FROM semesters
@@ -30,7 +29,7 @@ func (r *LecturesRepository) GetSemestersWithCourses(ctx context.Context) ([]mod
 	defer semRows.Close()
 
 	var semesters []models.SemesterWithCourses
-	semMap := make(map[int]int) // semester_id -> index in slice
+	semMap := make(map[int]int)
 
 	for semRows.Next() {
 		var s models.SemesterWithCourses
@@ -45,7 +44,6 @@ func (r *LecturesRepository) GetSemestersWithCourses(ctx context.Context) ([]mod
 		return nil, err
 	}
 
-	// Query courses ordered by display_order ASC, id ASC
 	courseQuery := `
 		SELECT id, semester_id, code, name_en, name_kr, note, display_order
 		FROM courses
@@ -69,3 +67,83 @@ func (r *LecturesRepository) GetSemestersWithCourses(ctx context.Context) ([]mod
 
 	return semesters, courseRows.Err()
 }
+
+func (r *LecturesRepository) CreateSemester(ctx context.Context, s models.Semester) (int, error) {
+	res, err := r.db.ExecContext(ctx, `
+		INSERT INTO semesters (year, term)
+		VALUES (?, ?)
+	`, s.Year, s.Term)
+	if err != nil {
+		return 0, fmt.Errorf("insert semester: %w", err)
+	}
+	id, err := res.LastInsertId()
+	return int(id), err
+}
+
+func (r *LecturesRepository) UpdateSemester(ctx context.Context, id int, s models.Semester) error {
+	res, err := r.db.ExecContext(ctx, `
+		UPDATE semesters
+		SET year = ?, term = ?
+		WHERE id = ?
+	`, s.Year, s.Term, id)
+	if err != nil {
+		return fmt.Errorf("update semester: %w", err)
+	}
+	rows, err := res.RowsAffected()
+	if err == nil && rows == 0 {
+		return sql.ErrNoRows
+	}
+	return err
+}
+
+func (r *LecturesRepository) DeleteSemester(ctx context.Context, id int) error {
+	res, err := r.db.ExecContext(ctx, `DELETE FROM semesters WHERE id = ?`, id)
+	if err != nil {
+		return fmt.Errorf("delete semester: %w", err)
+	}
+	rows, err := res.RowsAffected()
+	if err == nil && rows == 0 {
+		return sql.ErrNoRows
+	}
+	return err
+}
+
+func (r *LecturesRepository) CreateCourse(ctx context.Context, c models.Course) (int, error) {
+	res, err := r.db.ExecContext(ctx, `
+		INSERT INTO courses (semester_id, code, name_en, name_kr, note, display_order)
+		VALUES (?, ?, ?, ?, ?, ?)
+	`, c.SemesterID, c.Code, c.NameEn, c.NameKr, c.Note, c.DisplayOrder)
+	if err != nil {
+		return 0, fmt.Errorf("insert course: %w", err)
+	}
+	id, err := res.LastInsertId()
+	return int(id), err
+}
+
+func (r *LecturesRepository) UpdateCourse(ctx context.Context, id int, c models.Course) error {
+	res, err := r.db.ExecContext(ctx, `
+		UPDATE courses
+		SET code = ?, name_en = ?, name_kr = ?, note = ?, display_order = ?
+		WHERE id = ?
+	`, c.Code, c.NameEn, c.NameKr, c.Note, c.DisplayOrder, id)
+	if err != nil {
+		return fmt.Errorf("update course: %w", err)
+	}
+	rows, err := res.RowsAffected()
+	if err == nil && rows == 0 {
+		return sql.ErrNoRows
+	}
+	return err
+}
+
+func (r *LecturesRepository) DeleteCourse(ctx context.Context, id int) error {
+	res, err := r.db.ExecContext(ctx, `DELETE FROM courses WHERE id = ?`, id)
+	if err != nil {
+		return fmt.Errorf("delete course: %w", err)
+	}
+	rows, err := res.RowsAffected()
+	if err == nil && rows == 0 {
+		return sql.ErrNoRows
+	}
+	return err
+}