feat(littleblue): blue tool registry (list/propose action via local API) + run_turn extraEnv

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

lib/ai/agent/tools/blue/index.js

@@ -0,0 +1,9 @@
+import { createRegistry } from '../../registry.js';
+import { searchTool } from '../search.js';
+import { listActionsTool, proposeActionTool } from './actions.js';
+
+// read (search) + her action tools. No propose_change (she fixes infra, not content).
+export const blueRegistry = createRegistry();
+blueRegistry.registerTool(searchTool);
+blueRegistry.registerTool(listActionsTool);
+blueRegistry.registerTool(proposeActionTool);