Fixgo-gitea#33522 The suggestion backend logic now is- If the keyword is empty, returned the latest 5 issues/prs with indexdesc order- If the keyword is digital, find all issues/prs which `index` has aprefix with that, with index asc order- If the keyword is non-digital or if the queried records less than 5,searching issues/prs title with a `like`, with index desc order## Empty keyword<img width="310" alt="image"src="https://github.com/user-attachments/assets/1912c634-0d98-4eeb-8542-d54240901f77"/>## Digital<img width="479" alt="image"src="https://github.com/user-attachments/assets/0356a936-7110-4a24-b21e-7400201bf9b8"/>## Digital and title contains the digital<img width="363" alt="image"src="https://github.com/user-attachments/assets/6e12f908-28fe-48de-8ccc-09cbeab024d4"/>## non-Digital<img width="435" alt="image"src="https://github.com/user-attachments/assets/2722bb53-baa2-4d67-a224-522a65f73856"/><img width="477" alt="image"src="https://github.com/user-attachments/assets/06708dd9-80d1-4a88-b32b-d29072dd1ba6"/>---------Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>