Fix: Define tc_htonl/tc_htons as macros before winsock2.h to avoid struct-in_addr redefinition

lib/platform_compat.h

@@ -6,6 +6,12 @@
 #define PLATFORM_COMPAT_H
 
 #ifdef _WIN32
+    // Portable byte-order: must be first, before winsock2.h defines anything
+    #define tc_htons(x) ((uint16_t)(((uint16_t)(x) & 0xFFU) << 8) | (((uint16_t)(x) & 0xFF00U) >> 8))
+    #define tc_htonl(x) ((((uint32_t)(x) & 0x000000FFU) << 24) | (((uint32_t)(x) & 0x0000FF00U) << 8) | (((uint32_t)(x) & 0x00FF0000U) >> 8) | (((uint32_t)(x) & 0xFF000000U) >> 24))
+    #define tc_ntohs(x) tc_htons(x)
+    #define tc_ntohl(x) tc_htonl(x)
+
     #include <winsock2.h>
     #include <ws2tcpip.h>
     #include <windows.h>
@@ -153,11 +159,12 @@
 
 #include <stdint.h>
 
-// Portable byte-order: no winsock2, no struct in_addr, pure C
+#ifndef tc_htons
 static inline uint16_t tc_htons(uint16_t x) { return (uint16_t)(((x & 0xFFU) << 8) | ((x & 0xFF00U) >> 8)); }
 static inline uint32_t tc_htonl(uint32_t x) { return (((x & 0x000000FFU) << 24) | ((x & 0x0000FF00U) << 8) | ((x & 0x00FF0000U) >> 8) | ((x & 0xFF000000U) >> 24)); }
 #define tc_ntohs(x) tc_htons(x)
 #define tc_ntohl(x) tc_htonl(x)
+#endif
 
 // Generate cryptographically secure random bytes
 // Returns 0 on success, -1 on error