fix(sub): SS2022 share links must not base64-encode userinfo (#5432)

Per SIP022, ss:// links for 2022-blake3-* methods must NOT base64-encode
the userinfo; method and password are percent-encoded instead. Clients
like Hiddify reject the base64 form. Fix both the server-side
subscription path and the client-side panel link, plus the matching
parsers for round-trip import.

internal/util/link/outbound.go

@@ -344,7 +344,12 @@ func parseShadowsocks(link string) (*ParseResult, error) {
 		hp := core[at+1:]
 		userInfo, err := base64DecodeFlexible(userB64)
 		if err != nil {
-			userInfo = userB64 // not b64, rare
+			// SIP022 (2022-blake3-*) userinfo is percent-encoded, not base64.
+			if dec, uerr := url.QueryUnescape(userB64); uerr == nil {
+				userInfo = dec
+			} else {
+				userInfo = userB64 // not b64, rare
+			}
 		}
 		colon := strings.LastIndex(hp, ":")
 		if colon < 0 {