fix(inbounds): allow port 0 for UDS inbounds (#4783)

Unix Domain Socket inbounds (listen path starting with /) use port 0, which xray-core ignores. Validation was hard-locked to a minimum of 1 in three places: the shared Zod PortSchema, the AntD InputNumber, and the Go Inbound model tag. Adds an InboundPortSchema (min 0) for the inbound form/API schemas, makes the port InputNumber min UDS-aware, and relaxes the Inbound model validate tag to gte=0. PortSchema and the Node model stay min 1.

frontend/src/generated/zod.ts

@@ -291,7 +291,7 @@ export const InboundSchema = z.object({
   lastTrafficResetTime: z.number().int(),
   listen: z.string(),
   nodeId: z.number().int().nullable().optional(),
-  port: z.number().int().min(1).max(65535),
+  port: z.number().int().min(0).max(65535),
   protocol: z.enum(['vmess', 'vless', 'trojan', 'shadowsocks', 'wireguard', 'hysteria', 'http', 'mixed', 'tunnel', 'tun']),
   remark: z.string(),
   settings: z.unknown(),