Method handle_arrow_keys

src/runner/cli_wide.cpp:756–854

\brief Handle arrow keys (up/down/left/right)

/// \brief Handle arrow keys (up/down/left/right)
CLIWide::KeyAction CLIWide::handle_arrow_keys(const KEY_EVENT_RECORD& keyEvent, InputState& state) {
    WORD vkCode = keyEvent.wVirtualKeyCode;
    
    if (vkCode == VK_UP) {
        handle_history_navigation(true, state);
        handle_multiline_navigation(true, state);
    } else if (vkCode == VK_DOWN) {
        handle_history_navigation(false, state);
        handle_multiline_navigation(false, state);
    } else if (vkCode == VK_LEFT) {
        if (state.cursor_pos > 0) {
            // Normal left movement within current line
            state.cursor_pos--;
            // Handle UTF-8 continuation bytes
            while (state.cursor_pos > 0 && (static_cast<unsigned char>(state.lines[state.current_line_index][state.cursor_pos]) & 0xC0) == 0x80) {
                state.cursor_pos--;
            }
            // Position cursor at the correct position
            {
                CONSOLE_SCREEN_BUFFER_INFO csbi;
                if (GetConsoleScreenBufferInfo(hConsoleOutput, &csbi)) {
                    int visual_cursor_col = state.prompt_len + get_visual_cursor_position(state.lines[state.current_line_index], state.cursor_pos);
                    COORD pos = {static_cast<SHORT>(visual_cursor_col), csbi.dwCursorPosition.Y};
                    SetConsoleCursorPosition(hConsoleOutput, pos);
                }
            }
        } else if (state.lines.size() > 1 && state.current_line_index > 0) {
            // At beginning of line and we have multiple lines - move to end of previous line
            state.current_line_index--;
            state.cursor_pos = state.lines[state.current_line_index].length();
            state.prompt_len = (state.current_line_index == 0) ? 4 : 4; // ">>> " or "... "
            
            // Move cursor up one row and position it correctly
            CONSOLE_SCREEN_BUFFER_INFO csbi;
            if (GetConsoleScreenBufferInfo(hConsoleOutput, &csbi)) {
                SHORT new_y = static_cast<SHORT>(csbi.dwCursorPosition.Y - 1);
                
                // Move cursor up one row
                COORD pos = {0, new_y};
                SetConsoleCursorPosition(hConsoleOutput, pos);
                
                // Clear and redraw the previous line
                clear_line_from_cursor();
                bool is_first = (state.current_line_index == 0);
                std::cout << (is_first ? ">>> " : "... ") << visualize_tabs(state.lines[state.current_line_index]);
                
                // Position cursor at the end of the previous line
                int visual_cursor_col = state.prompt_len + get_visual_cursor_position(state.lines[state.current_line_index], state.cursor_pos);
                COORD cursor_pos = {static_cast<SHORT>(visual_cursor_col), new_y};
                SetConsoleCursorPosition(hConsoleOutput, cursor_pos);
            }
        }
    } else if (vkCode == VK_RIGHT) {
        if (state.cursor_pos < state.lines[state.current_line_index].length()) {
            // Normal right movement within current line
            state.cursor_pos++;
            // Handle UTF-8 continuation bytes
            while (state.cursor_pos < state.lines[state.current_line_index].length() && (static_cast<unsigned char>(state.lines[state.current_line_index][state.cursor_pos]) & 0xC0) == 0x80) {