错误修复

backend-java/src/main/java/com/pharmacopoeia/security/JwtAuthFilter.java

@@ -67,7 +67,7 @@ public class JwtAuthFilter extends OncePerRequestFilter {
             String token = header.substring(7);
             log.info("JWT 认证请求: {} {} | token={}...", method, uri, token.substring(0, Math.min(20, token.length())));
             if (jwtUtil.validateToken(token)) {
-                String subject = jwtUtil.getSu2bject(token);
+                String subject = jwtUtil.getSubject(token);
                 var auth = new UsernamePasswordAuthenticationToken(subject, null, Collections.emptyList());
                 SecurityContextHolder.getContext().setAuthentication(auth);
                 log.info("JWT 认证通过: subject={}, uri={} {}", subject, method, uri);