Initial commit: split VNOX monorepo into VNOX-Server

Unified server binary (vnox-serverd) combining:
- Gateway (TCP, auth, channels, sessions, SQLite)
- Voice-node (UDP relay, Opus, jitter buffer)

Standalone gateway (vnox-gateway) and voice-node (vnox-voice-node) preserved as sub-crates.

gateway/src/proto/payloads/guild.rs

@@ -0,0 +1,161 @@
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct GuildCreatePayload {
+    pub name: String,
+}
+
+#[derive(Debug, Serialize, Deserialize, Clone)]
+pub struct GuildInfo {
+    pub id: String,
+    pub owner_id: String,
+    pub name: String,
+    pub member_count: i64,
+    pub created_at: i64,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct GuildListPayload {
+    pub guilds: Vec<GuildInfo>,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct GuildMemberJoinPayload {
+    pub guild_id: String,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct GuildMemberLeavePayload {
+    pub guild_id: String,
+    pub user_id: String,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct GuildMemberKickPayload {
+    pub guild_id: String,
+    pub user_id: String,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct RoleCreatePayload {
+    pub guild_id: String,
+    pub name: String,
+    pub color: Option<String>,
+    pub permissions: Option<u64>,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct RoleDeletePayload {
+    pub guild_id: String,
+    pub role_id: String,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct InviteCreatePayload {
+    pub guild_id: String,
+    pub max_uses: Option<i64>,
+    pub expires_in_seconds: Option<i64>,
+}
+
+#[derive(Debug, Serialize, Deserialize, Clone)]
+pub struct InviteInfo {
+    pub id: String,
+    pub guild_id: String,
+    pub guild_name: String,
+    pub code: String,
+    pub creator_id: String,
+    pub max_uses: Option<i64>,
+    pub uses: i64,
+    pub expires_at: Option<i64>,
+    pub created_at: i64,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct InviteAcceptPayload {
+    pub code: String,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct InviteDeletePayload {
+    pub guild_id: String,
+    pub invite_id: String,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct GuildAuditLogFetchPayload {
+    pub guild_id: String,
+    #[serde(default = "default_audit_limit")]
+    pub limit: i64,
+}
+
+fn default_audit_limit() -> i64 {
+    50
+}
+
+#[derive(Debug, Serialize, Deserialize, Clone)]
+pub struct AuditLogEntryPayload {
+    pub id: String,
+    pub guild_id: String,
+    pub actor_id: String,
+    pub action: String,
+    pub target_id: Option<String>,
+    pub target_type: Option<String>,
+    pub reason: Option<String>,
+    pub created_at: i64,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct GuildAuditLogPayload {
+    pub guild_id: String,
+    pub entries: Vec<AuditLogEntryPayload>,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct GuildMemberListFetchPayload {
+    pub guild_id: String,
+}
+
+#[derive(Debug, Serialize, Deserialize, Clone)]
+pub struct GuildMemberInfoPayload {
+    pub user_id: String,
+    pub nickname: String,
+    pub joined_at: i64,
+    pub role_color: String,
+    pub role_name: String,
+    /// True if this user is the guild owner.
+    pub is_owner: bool,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct GuildMemberListPayload {
+    pub guild_id: String,
+    pub members: Vec<GuildMemberInfoPayload>,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct RoleAssignPayload {
+    pub guild_id: String,
+    pub user_id: String,
+    pub role_id: String,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct GuildRoleListFetchPayload {
+    pub guild_id: String,
+}
+
+#[derive(Debug, Serialize, Deserialize, Clone)]
+pub struct GuildRoleInfoPayload {
+    pub id: String,
+    pub guild_id: String,
+    pub name: String,
+    pub color: String,
+    pub permissions: u64,
+    pub position: i32,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct GuildRoleListPayload {
+    pub guild_id: String,
+    pub roles: Vec<GuildRoleInfoPayload>,
+}