initial commit — SIP B2BUA + WebRTC bridge with Rust codec engine

Full-featured SIP router with multi-provider trunking, browser softphone
via WebRTC, real-time Opus/G.722/PCM transcoding in Rust, RNNoise ML
noise suppression, Kokoro neural TTS announcements, and a Lit-based
web dashboard with live call monitoring and REST API.

ts/call/types.ts

@@ -0,0 +1,68 @@
+/**
+ * Hub model type definitions — Call, Leg, and status types.
+ */
+
+import type { IEndpoint } from '../sip/index.ts';
+
+// ---------------------------------------------------------------------------
+// State types
+// ---------------------------------------------------------------------------
+
+export type TCallState =
+  | 'setting-up'
+  | 'ringing'
+  | 'connected'
+  | 'on-hold'
+  | 'transferring'
+  | 'terminating'
+  | 'terminated';
+
+export type TLegState =
+  | 'inviting'
+  | 'ringing'
+  | 'connected'
+  | 'on-hold'
+  | 'terminating'
+  | 'terminated';
+
+export type TLegType = 'sip-device' | 'sip-provider' | 'webrtc';
+
+export type TCallDirection = 'inbound' | 'outbound' | 'internal';
+
+// ---------------------------------------------------------------------------
+// Status interfaces (for frontend dashboard)
+// ---------------------------------------------------------------------------
+
+export interface ILegStatus {
+  id: string;
+  type: TLegType;
+  state: TLegState;
+  remoteMedia: IEndpoint | null;
+  rtpPort: number | null;
+  pktSent: number;
+  pktReceived: number;
+  codec: string | null;
+  transcoding: boolean;
+}
+
+export interface ICallStatus {
+  id: string;
+  state: TCallState;
+  direction: TCallDirection;
+  callerNumber: string | null;
+  calleeNumber: string | null;
+  providerUsed: string | null;
+  createdAt: number;
+  duration: number;
+  legs: ILegStatus[];
+}
+
+export interface ICallHistoryEntry {
+  id: string;
+  direction: TCallDirection;
+  callerNumber: string | null;
+  calleeNumber: string | null;
+  providerUsed: string | null;
+  startedAt: number;
+  duration: number;
+}