feat: move session sharing and collab rooms into a plugin (B12)

src/backend/hosts/live-terminal-sessions.ts

@@ -1,17 +1,17 @@
 /**
  * What core needs from live SSH terminal sessions, through the plugin
- * service "sessions.live" rather than an import.
+ * service "sessions.live" (the "ssh" provider) rather than an import.
  *
- * Session sharing, collab and the open-tabs route still live in core and
- * reach the sessions the ssh-terminal plugin holds. With no provider (the
- * plugin is off) a lookup finds nothing and a control call does nothing,
- * because "no such live session" and "the terminal is off" mean the same
- * thing to every caller here.
+ * The open-tabs route lists the caller's sessions and ties saved tabs to the
+ * terminal's idle timeout. With no provider (the terminal is off) a lookup
+ * finds nothing, because "no live session" and "the terminal is off" mean the
+ * same thing there.
  */
 
 import { getServiceImplementation } from "../plugins/service-registry.js";
 
 export const LIVE_SESSIONS_SERVICE = "sessions.live";
+const SSH_PROVIDER = "ssh";
 
 export interface LiveSessionInfo {
   id: string;
@@ -28,19 +28,7 @@ export interface LiveSessionInfo {
 }
 
 interface LiveSessionsV1 {
-  getSession: (sessionId: string) => LiveSessionInfo | null;
   listForUser: (userId: string) => LiveSessionInfo[];
-  ownerEndSession: (sessionId: string, reason: string) => void;
-  disconnectParticipants: (
-    sessionId: string,
-    shareId: string,
-    options: { reason: string; userId?: string | null },
-  ) => number;
-  setRoomShareControl: (
-    sessionId: string,
-    shareId: string,
-    controllerUserId: string | null,
-  ) => void;
   idleTimeoutMinutes: () => number;
 }
 
@@ -48,33 +36,14 @@ function provider(): LiveSessionsV1 | undefined {
   return getServiceImplementation<LiveSessionsV1>(
     LIVE_SESSIONS_SERVICE,
     "^1.0.0",
+    SSH_PROVIDER,
   );
 }
 
 export const liveTerminalSessions = {
-  getSession(sessionId: string): LiveSessionInfo | null {
-    return provider()?.getSession(sessionId) ?? null;
-  },
   listForUser(userId: string): LiveSessionInfo[] {
     return provider()?.listForUser(userId) ?? [];
   },
-  ownerEndSession(sessionId: string, reason: string): void {
-    provider()?.ownerEndSession(sessionId, reason);
-  },
-  disconnectShareParticipants(
-    sessionId: string,
-    shareId: string,
-    options: { reason: string; userId?: string | null },
-  ): number {
-    return provider()?.disconnectParticipants(sessionId, shareId, options) ?? 0;
-  },
-  setRoomShareControl(
-    sessionId: string,
-    shareId: string,
-    controllerUserId: string | null,
-  ): void {
-    provider()?.setRoomShareControl(sessionId, shareId, controllerUserId);
-  },
   /** How long the terminal keeps a detached session, or null while it is off. */
   idleTimeoutMinutes(): number | null {
     return provider()?.idleTimeoutMinutes() ?? null;