Como posso usando python  melhorar a interface do meu aplicativo e adicionar mais fontes de papers sobre tecnologia, dicas, programas, e melhorar a usabilidade e design deixando-o intuitivo. segue o meu código atual: import sys
import requests
import feedparser
import json
import os
from datetime import datetime
import re
from PyQt5.QtWidgets import QApplication, QWidget, QLabel, QLineEdit, QPushButton, QVBoxLayout, QMessageBox, QListWidget, QListWidgetItem, QCheckBox, QAbstractItemView

def fetch_relevant_arxiv_papers(category, search_terms, max_results=50):
    query = '+AND+'.join([f'all:{term}' for term in search_terms])
    url = f'http://export.arxiv.org/api/query?search_query=cat:{category}+AND+{query}&start=0&max_results={max_results}&sortBy=submittedDate&sortOrder=descending'
    response = requests.get(url)
    feed = feedparser.parse(response.content)
    
    papers = []
    for entry in feed.entries:
        paper = {
            'title': entry.title,
            'authors': [author.name for author in entry.authors],
            'summary': entry.summary,
            'published': entry.published,
            'link': entry.link,
            'arxiv_id': entry.id.split('/abs/')[-1]
        }
        papers.append(paper)
    return papers

def save_paper(paper, output_dir):
    sanitized_title = re.sub(r'[<>:"/\\|?*]', '_', paper['title'][:50])
    filename = f"{paper['arxiv_id']}_{sanitized_title}.json".replace(' ', '_')
    filepath = os.path.join(output_dir, filename)
    
    with open(filepath, 'w', encoding='utf-8') as f:
        json.dump(paper, f, ensure_ascii=False, indent=2)

class ArxivApp(QWidget):
    def __init__(self):
        super().__init__()
        self.cached_papers = []
        self.initUI()

    def initUI(self):
        self.setWindowTitle('Busca de Artigos do arXiv')
        
        self.layout = QVBoxLayout()
        
        self.label_category = QLabel('Categoria (ex: cs.AI):')
        self.layout.addWidget(self.label_category)
        
        self.input_category = QLineEdit(self)
        self.input_category.setText('cs.AI')
        self.layout.addWidget(self.input_category)
        
        self.label_search = QLabel('Termos de Busca (separados por espaço):')
        self.layout.addWidget(self.label_search)
        
        self.input_search = QLineEdit(self)
        self.input_search.setText('llms prompt')
        self.layout.addWidget(self.input_search)
        
        self.search_button = QPushButton('Buscar Artigos', self)
        self.search_button.clicked.connect(self.on_search_click)
        self.layout.addWidget(self.search_button)
        
        self.papers_list = QListWidget(self)
        self.papers_list.setSelectionMode(QAbstractItemView.MultiSelection)
        self.layout.addWidget(self.papers_list)
        
        self.save_button = QPushButton('Salvar Artigos Selecionados', self)
        self.save_button.clicked.connect(self.on_save_click)
        self.layout.addWidget(self.save_button)
        
        self.status_label = QLabel('')
        self.layout.addWidget(self.status_label)
        
        self.setLayout(self.layout)
    
    def on_search_click(self):
        category = self.input_category.text()
        search_terms = self.input_search.text().split()
        
        self.status_label.setText('Buscando artigos...')
        self.cached_papers = fetch_relevant_arxiv_papers(category, search_terms)
        
        self.papers_list.clear()
        for paper in self.cached_papers:
            item = QListWidgetItem(paper['title'])
            item.setCheckState(0)
            self.papers_list.addItem(item)
        
        self.status_label.setText(f'{len(self.cached_papers)} artigos encontrados.')
    
    def on_save_click(self):
        output_dir = f"arxiv_papers_{datetime.now().strftime('%Y%m%d_%H%M%S')}"
        os.makedirs(output_dir, exist_ok=True)
        
        selected_items = self.papers_list.selectedItems()
        selected_papers = [self.cached_papers[self.papers_list.row(item)] for item in selected_items]
        
        for paper in selected_papers:
            save_paper(paper, output_dir)
        
        self.status_label.setText(f'{len(selected_papers)} artigos salvos em: {output_dir}')
        QMessageBox.information(self, 'Concluído', f'{len(selected_papers)} artigos salvos com sucesso!')
    
    def closeEvent(self, event):
        self.cached_papers = []
        event.accept()

def main():
    app = QApplication(sys.argv)
    ex = ArxivApp()
    ex.show()
    sys.exit(app.exec_())

if __name__ == '__main__':
    main()