feat: let agents read supervisor story graphs

Expose saved decisions, timelines and source evidence through read-only Story Graph tools across Model, Harness and local/remote OpenCode and Continue. Supervisor enablement and runtime assignments govern discovery and calls; reads do not invoke models or modify stored evidence. Remote use requires matching Desktop and Agent changes.

Make Continue discussion show the complete editable message with a separated destination and shared action layout. Sending uses the visible draft without reattaching removed context.

Validation: existing focused MCP, runtime, controlled Linux Host, discussion component and Electron layout checks plus typechecks; staged diff check passed. Cross-scope fact reuse, historical reconstruction and full package acceptance remain deferred.

Release note: Agents can consult saved supervisor decisions and their sources when continuing work. Continue discussion now lets you review and edit the complete message before sending.

src/main/agent/remote-runtime-channel.ts

@@ -114,7 +114,8 @@ export interface RemoteRuntimeChannel {
   preparePrompt(
     preparation: RemotePromptOperationPreparation,
     imageToolBinding?: ImageToolBinding,
-    waitSignal?: AbortSignal
+    waitSignal?: AbortSignal,
+    storyGraphBinding?: import('./knowledge-mcp-gateway').StoryGraphRemoteBinding
   ): Promise<RemotePromptOperationAcceptance>
   /** Starts an Agent-owned ACP prompt exactly once for its stable operation. */
   startOwnedPrompt?(