Expose PM invitation operations and membership checks through JNI

tools/chatgui-android/app/src/main/java/com/utun/chat/data/NativeLib.kt

@@ -196,6 +196,9 @@ object NativeLib {
     /* ── DM (личные сообщения) ── */
     fun dmStart(nodeId: Long, sourceChId: String, peerName: String) { nativeDmStart(nodeId, sourceChId, peerName) }
     fun dmSend(convId: String, text: String) { nativeDmSend(convId, text) }
+    fun dmInvite(requestId: Long, peer: Long, source: String, channelId: Long, name: String, cancel: Boolean = false): Boolean =
+        nativeDmInvite(requestId, peer, source, channelId, name, cancel)
+    fun isChannelMember(channelId: String, nodeId: Long): Boolean = nativeIsChannelMember(channelId, nodeId)
     fun dmRequestConversations() { nativeDmRequestConversations() }
     fun dmRequestCallRoute(convId: String) { nativeDmRequestCallRoute(convId) }
     fun dmRequestMessages(convId: String) { nativeDmRequestMessages(convId) }
@@ -310,6 +313,8 @@ object NativeLib {
     /* ── DM JNI ── */
     private external fun nativeDmStart(nodeId: Long, sourceChId: String, peerName: String)
     private external fun nativeDmSend(convId: String, text: String)
+    private external fun nativeDmInvite(requestId: Long, peer: Long, source: String, channelId: Long, name: String, cancel: Boolean): Boolean
+    private external fun nativeIsChannelMember(channelId: String, nodeId: Long): Boolean
     private external fun nativeDmRequestConversations()
     private external fun nativeDmRequestCallRoute(convId: String)
     private external fun nativeDmRequestMessages(convId: String)

tools/chatgui-android/jni_bridge/android_jni_bridge.c

@@ -29,6 +29,7 @@
 #include "../../../src/chat/chat_core.h"
 #include "../../../src/chat/invite_build.h"
 #include "../../../src/chat/chat_setting.h"
+#include "../../../src/routing_layer/topo_node_sqlite.h"
 #include "../../../src/utun_instance.h"
 #include "../../../src/transport_layer/etcp.h"
 #include "../../../src/transport_layer/etcp_connections.h"
@@ -1906,6 +1907,44 @@ JNIEXPORT void JNICALL Java_com_utun_chat_data_NativeLib_nativeDmSend(
     if (c) (*env)->ReleaseStringUTFChars(env, convId, c);
 }
 
+/* UI получает подтверждение commit через CHAT_EVT_DM_INVITE_RESULT, а не через return JNI. */
+JNIEXPORT jboolean JNICALL Java_com_utun_chat_data_NativeLib_nativeDmInvite(
+    JNIEnv* env, jobject thiz, jlong request_id, jlong peer, jstring source, jlong channel, jstring name, jboolean cancel) {
+    (void)thiz;
+    struct UASYNC* ua = instance_lite_get_uasync();
+    struct UTUN_INSTANCE* inst = instance_lite_get_instance();
+    if (!uasync_is_running(ua) || !inst) { bridge_log(BLEV_ERROR, "invite PM: core unavailable"); return JNI_FALSE; }
+    struct dm_invite_req* req = u_calloc(1, sizeof(*req));
+    if (!req) { bridge_log(BLEV_ERROR, "invite PM: request allocation failed"); return JNI_FALSE; }
+    const char* src = (*env)->GetStringUTFChars(env, source, NULL);
+    const char* nm = src ? (*env)->GetStringUTFChars(env, name, NULL) : NULL;
+    if (!src || !nm) {
+        if (src) (*env)->ReleaseStringUTFChars(env, source, src);
+        bridge_log(BLEV_ERROR, "invite PM: string conversion failed"); u_free(req); return JNI_FALSE;
+    }
+    req->inst = inst; req->request_id = (uint64_t)request_id; req->peer_node_id = (uint64_t)peer;
+    req->channel_id = (uint64_t)channel; req->cancel = cancel ? 1 : 0;
+    snprintf(req->source_ch_id, sizeof(req->source_ch_id), "%s", src);
+    snprintf(req->peer_name, sizeof(req->peer_name), "%s", nm);
+    (*env)->ReleaseStringUTFChars(env, source, src); (*env)->ReleaseStringUTFChars(env, name, nm);
+    if (uasync_post(ua, dm_invite_trampoline, req) != 0) {
+        bridge_log(BLEV_ERROR, "invite PM: post failed"); u_free(req); return JNI_FALSE;
+    }
+    return JNI_TRUE;
+}
+
+/* Чтение членства для выбора групп и открытия уже присоединённого канала. */
+JNIEXPORT jboolean JNICALL Java_com_utun_chat_data_NativeLib_nativeIsChannelMember(
+    JNIEnv* env, jobject thiz, jstring channel, jlong node) {
+    (void)thiz;
+    struct UTUN_INSTANCE* inst = instance_lite_get_instance();
+    const char* id = (*env)->GetStringUTFChars(env, channel, NULL);
+    if (!id) { bridge_log(BLEV_ERROR, "channel membership: string conversion failed"); return JNI_FALSE; }
+    int member = inst && topo_node_sqlite_member_in_channel(inst->topo_sqlite_db, id, (uint64_t)node);
+    (*env)->ReleaseStringUTFChars(env, channel, id);
+    return member ? JNI_TRUE : JNI_FALSE;
+}
+
 JNIEXPORT void JNICALL Java_com_utun_chat_data_NativeLib_nativeDmRequestConversations(
     JNIEnv* env, jobject thiz) {
     (void)env; (void)thiz;