Method handle_backspace_with_wrapping

src/runner/cli_wide.cpp:1198–1278

\brief Handle backspace with line wrapping support

/// \brief Handle backspace with line wrapping support
void CLIWide::handle_backspace_with_wrapping(InputState& state) {
    if (state.cursor_pos > 0) {
        // Normal backspace within the same line
        std::string& current_line = state.lines[state.current_line_index];
        
        // Check if we're deleting a tab character
        if (current_line[state.cursor_pos - 1] == '\t') {
            current_line.erase(state.cursor_pos - 1, 1);
            state.cursor_pos--;
        } else {
            // Find the start of the character to delete
            size_t delete_start = state.cursor_pos - 1;
            // Handle UTF-8 continuation bytes
            while (delete_start > 0 && (static_cast<unsigned char>(current_line[delete_start]) & 0xC0) == 0x80) {
                delete_start--;
            }
            
            current_line.erase(delete_start, state.cursor_pos - delete_start);
            state.cursor_pos = delete_start;
        }
        
        // Redraw line from cursor position with tab visualization
        int visual_cursor_col = state.prompt_len + get_visual_cursor_position(current_line, state.cursor_pos);
        
        // Get current cursor position and move to correct position
        CONSOLE_SCREEN_BUFFER_INFO csbi;
        if (GetConsoleScreenBufferInfo(hConsoleOutput, &csbi)) {
            COORD pos = {static_cast<SHORT>(visual_cursor_col), csbi.dwCursorPosition.Y};
            SetConsoleCursorPosition(hConsoleOutput, pos);
            clear_line_from_cursor();
            std::cout << visualize_tabs(current_line.substr(state.cursor_pos));
            
            // Position cursor at the correct final position
            COORD final_pos = {static_cast<SHORT>(visual_cursor_col), csbi.dwCursorPosition.Y};
            SetConsoleCursorPosition(hConsoleOutput, final_pos);
        }
    } else if (state.current_line_index > 0) {
        // Backspace at beginning of line - delete last character of previous line and current line
        std::string& current_line = state.lines[state.current_line_index];
        std::string& prev_line = state.lines[state.current_line_index - 1];
        
        // Remove the current line first
        state.lines.erase(state.lines.begin() + state.current_line_index);
        state.is_wrapped_line.erase(state.is_wrapped_line.begin() + state.current_line_index);
        
        // Move to previous line
        state.current_line_index--;
        state.prompt_len = (state.current_line_index == 0) ? 4 : 4; // ">>> " or "... "
        
        // Delete the last character of the previous line
        if (!prev_line.empty()) {
            // Find the start of the last character to delete
            size_t delete_start = prev_line.length() - 1;
            // Handle UTF-8 continuation bytes
            while (delete_start > 0 && (static_cast<unsigned char>(prev_line[delete_start]) & 0xC0) == 0x80) {
                delete_start--;
            }