Initial commit: split VNOX monorepo into VNOX-Client

Desktop client with egui + wgpu UI, audio pipeline (cpal/opus/rodio),
networking (LNEx protocol), and identity management with encrypted vault.

Jitter buffer module extracted from voice-node for standalone operation.

src/net/payloads/dm.rs

@@ -0,0 +1,133 @@
+use serde::{Deserialize, Serialize};
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct DmStartPayload {
+    pub target_user_id: String,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct DmStartResponsePayload {
+    pub dm_id: String,
+    pub other_user_id: String,
+    pub other_nickname: String,
+    pub messages: Vec<DmMessagePayload>,
+    #[serde(default)]
+    pub unread_count: u32,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub struct DmMessagePayload {
+    pub dm_id: String,
+    pub sender_id: String,
+    pub content: String,
+    pub timestamp: i64,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct DmHistoryPayload {
+    pub dm_id: String,
+    #[serde(default)]
+    pub messages: Vec<DmMessagePayload>,
+    #[serde(default)]
+    pub search_query: Option<String>,
+    #[serde(default)]
+    pub limit: Option<i64>,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct PresenceUpdatePayload {
+    pub status: String,
+    /// Free-form activity type ("playing", "listening", "watching", "streaming").
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub activity_type: Option<String>,
+    /// Free-form activity text (e.g. "CS2 ranked").
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub activity_text: Option<String>,
+    /// Free-form custom status text (Discord-style "what's on your mind?").
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub custom_status: Option<String>,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub struct PresenceInfoPayload {
+    pub user_id: String,
+    pub status: String,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub custom_status: Option<String>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub activity: Option<String>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub activity_text: Option<String>,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct PresenceSyncPayload {
+    pub presences: Vec<PresenceInfoPayload>,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct PresenceEventPayload {
+    pub user_id: String,
+    pub status: String,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub custom_status: Option<String>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub activity: Option<String>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub activity_text: Option<String>,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct FriendRequestPayload {
+    pub target_user_id: String,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct FriendAcceptPayload {
+    pub user_id: String,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct FriendDeclinePayload {
+    pub user_id: String,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct FriendRemovePayload {
+    pub user_id: String,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub struct FriendInfoPayload {
+    pub user_id: String,
+    pub nickname: String,
+    pub status: String,
+    pub since: i64,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct FriendListPayload {
+    pub friends: Vec<FriendInfoPayload>,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct BlockUserPayload {
+    pub user_id: String,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct UnblockUserPayload {
+    pub user_id: String,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct BlockListPayload {
+    pub blocked: Vec<String>,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct FriendEventPayload {
+    pub event_type: String,
+    pub user_id: String,
+    pub nickname: Option<String>,
+}