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/shared/scoped-data-tools.ts

@@ -1,4 +1,5 @@
 import { z } from 'zod'
+import { storyGraphTools } from './story-graph-tools'
 import { obsidianScopedDataTools } from './obsidian-tools'
 import {
   goodbuddyConfigTools,
@@ -235,6 +236,7 @@ export const magicNoteScopedDataTools = [
 ] as const satisfies readonly ScopedDataToolDefinition[]
 
 export const scopedDataTools = [
+  ...storyGraphTools,
   ...knowledgeScopedDataTools,
   ...magicNoteScopedDataTools,
   ...obsidianScopedDataTools,