Push live updates to the UI while agent runs execute

Engine-side writes - hires, delegated tasks, chat messages, run state -
only reached the renderer after a run finished: the queue worker sent
one snapshot-changed at the end, and nothing fired at claim time, so
the window sat frozen for the minutes a CEO run takes unless the user
reloaded by hand. The execution service now takes a notifyDataChanged
callback, the agent loop fires it after every tool-bearing iteration,
and the worker announces the claim itself, so the UI follows the
company working in real time.

AgentCompany-New/src/main/services/agent-run-loop.ts

@@ -23,6 +23,8 @@ export interface AgentRunLoopResult {
 export interface AgentRunLoopDeps {
   providers: Pick<ProviderService, "runToolTurn">;
   tools: AgentToolDeps;
+  /** Called after each iteration's tool calls have written their effects. */
+  onToolResults?: () => void;
 }
 
 /**
@@ -63,6 +65,7 @@ export async function runAgentLoop(deps: AgentRunLoopDeps, input: AgentRunLoopIn
       return { toolCallId: call.id, toolName: call.name, output: dispatchAgentTool(deps.tools, input.toolContext, call) };
     });
     messages.push({ role: "tool", results });
+    deps.onToolResults?.();
   }
 
   throw new Error(`Agent run did not converge within ${MAX_ITERATIONS} iterations.`);