fix this mess of libraries

lib/ipc.h

@@ -0,0 +1,29 @@
+#pragma once
+
+#include <stdint.h>
+#include <pthread.h>
+#include <sys/socket.h>
+#include <unistd.h>
+#include <stdio.h>
+
+#define IPC_BACKLOG 1
+
+typedef struct {
+    int  client_fd;
+    void *user_data;
+} ipc_client_arg_t;
+
+typedef void *(*ipc_client_fn)(ipc_client_arg_t *arg);
+
+typedef struct {
+    int server_fd;
+    volatile int running;
+    ipc_client_fn handler;
+    void *user_data;
+    pthread_t _tid;       /* internal — do not touch */
+    char *socket_path;
+} ipc_ctx_t;
+
+int  create_ipc(ipc_ctx_t *ctx, ipc_client_fn handler,
+                const char *socket_path, void *user_data);
+void destroy_ipc(ipc_ctx_t *ctx);