WHOIS tool: allow IP address input (RIR/RDAP lookup)

Currently the WHOIS GUI only accepts domain names. Entering an IP address (e.g. 83.65.246.198) shows “Enter a valid Domain Name”, so IP WHOIS lookups are not possible.

Expected behavior
- Accept IPv4/IPv6 as valid input
- If input is an IP, perform a network/RIR lookup (RIPE/ARIN/APNIC/etc.), preferably via RDAP, and show allocation info (netblock/org/abuse)

Steps to reproduce
1. Open Tools -> WHOIS
2. Enter 83.65.246.198
3. Error: “Enter a valid Domain Name”

从 Tools -> WHOIS 屏幕开始，跟踪域名验证和查询的入口点。检查当前查询如何显示结果，然后将完成标准定义为接受 IPv4 和 IPv6 输入、查询适当的 RIR/RDAP 服务，并显示分配、组织和滥用信息。

由索引模型根据 Issue 内容生成。