with open('lib/screens/catalog_screen.dart', 'r', encoding='utf-8') as f:
    src = f.read()

# 1. Add import
import_line = "import '../widgets/external_symbols_browser.dart';\n"
if "external_symbols_browser.dart" not in src:
    src = import_line + src

# 2. Add '🌐 Другие символы' to _filters
target_filters = """  final List<String> _filters = [
    'Все',
    '✨ Все системы',"""

repl_filters = """  final List<String> _filters = [
    'Все',
    '🌐 Другие символы',
    '✨ Все системы',"""

assert target_filters in src, "target_filters not found"
src = src.replace(target_filters, repl_filters, 1)

# 3. Handle '🌐 Другие символы' in count display
target_count_display = """          if (_atlasMode == 'words')
            Padding(
              padding: const EdgeInsets.fromLTRB(16, 12, 16, 4),"""

repl_count_display = """          if (_atlasMode == 'words' && _selectedFilter != '🌐 Другие символы')
            Padding(
              padding: const EdgeInsets.fromLTRB(16, 12, 16, 4),"""

assert target_count_display in src, "target_count_display not found"
src = src.replace(target_count_display, repl_count_display, 1)

# 4. Handle '🌐 Другие символы' in body
target_body = """          Expanded(
            child: _atlasMode == 'canon' &&"""

repl_body = """          Expanded(
            child: _selectedFilter == '🌐 Другие символы'
                ? ExternalSymbolsBrowser(searchQuery: _searchController.text.trim())
                : _atlasMode == 'canon' &&"""

assert target_body in src, "target_body not found"
src = src.replace(target_body, repl_body, 1)

with open('lib/screens/catalog_screen.dart', 'w', encoding='utf-8') as f:
    f.write(src)

print("catalog_screen.dart patched successfully!")