Tactical Media Broadcast Hub — initial release

Self-hosted multi-platform broadcast newsroom for activist collectives:
publishing pipeline with group approval and DST-proof scheduling, TweetDeck-style
column wall with hostile-content-safe rendering, live control room with Auto
Director, bridged chat governance with polls and quorum, distributed sandboxed
transcode workers, encrypted content-addressed archive, monthly analytics.

MIT licensed. See README.md and docs/.

packages/core/src/messaging.ts

@@ -0,0 +1,47 @@
+/** Transport-agnostic list page — shared by every paginated surface. */
+export interface Page<T, C = string> {
+  items: T[];
+  nextCursor?: C;
+}
+
+export interface RemoteMedia {
+  remoteId: string;
+  url?: string;
+  mimeType: string;
+  width?: number;
+  height?: number;
+}
+
+/** Result of resolving a live source for program input (WP6 go-live slice). */
+export interface LiveSourceResolution {
+  /** Absolute HLS playback URL, or null when the source is not live. */
+  playbackHlsUrl: string | null;
+  live: boolean;
+}
+
+export interface StreamPlaybackSource {
+  remoteId: string;
+  /** Absolute playback URL (HLS manifest, embed page, etc.). */
+  url: string;
+  kind: "hls" | "dash" | "embed";
+  protocol: "https" | "rtmp" | "rtmps" | "srt";
+}
+
+export interface DirectMessage {
+  id: string;
+  provider: string;
+  conversationRemoteId: string;
+  fromHandle: string;
+  toHandle: string;
+  text: string;
+  sentAt: Date;
+}
+
+export interface NormalizedWebhookEvent {
+  provider: string;
+  eventType: string;
+  /** Connection or channel the event belongs to, when resolvable. */
+  connectionKey?: string;
+  payload: Record<string, unknown>;
+  receivedAt: Date;
+}