feat: broadcast pilot agent traces via WebSocket for live status on reconnect

Agent trace logs are now stored in-memory (pilotRunStore) and broadcast
through the existing /ws/crm-updates WebSocket channel. When a client
reconnects, it receives a pilot.catchup with all accumulated logs so the
user sees agent progress even after page reload. Three new WS event
types: pilot.trace, pilot.finished, pilot.catchup.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/server/utils/pilotRunStore.ts

@@ -0,0 +1,59 @@
+export type PilotRunLog = { id: string; text: string; at: string };
+
+export type PilotRun = {
+  status: "running" | "finished" | "error";
+  logs: PilotRunLog[];
+  startedAt: string;
+  finishedAt?: string;
+};
+
+const activeRuns = new Map<string, PilotRun>();
+
+const MAX_AGE_MS = 10 * 60 * 1000; // 10 minutes
+
+function cleanup() {
+  const now = Date.now();
+  for (const [key, run] of activeRuns) {
+    if (now - new Date(run.startedAt).getTime() > MAX_AGE_MS) {
+      activeRuns.delete(key);
+    }
+  }
+}
+
+export function startPilotRun(conversationId: string) {
+  cleanup();
+  activeRuns.set(conversationId, {
+    status: "running",
+    logs: [],
+    startedAt: new Date().toISOString(),
+  });
+}
+
+export function addPilotTrace(conversationId: string, text: string) {
+  const run = activeRuns.get(conversationId);
+  if (!run || run.status !== "running") return;
+  run.logs.push({
+    id: `${Date.now()}-${Math.floor(Math.random() * 1_000_000)}`,
+    text,
+    at: new Date().toISOString(),
+  });
+}
+
+export function finishPilotRun(conversationId: string, status: "finished" | "error" = "finished") {
+  const run = activeRuns.get(conversationId);
+  if (!run) return;
+  run.status = status;
+  run.finishedAt = new Date().toISOString();
+  // Keep for a short time so late-connecting clients can see it finished
+  setTimeout(() => {
+    if (activeRuns.get(conversationId) === run) {
+      activeRuns.delete(conversationId);
+    }
+  }, 5000);
+}
+
+export function getActivePilotRun(conversationId: string): PilotRun | null {
+  const run = activeRuns.get(conversationId);
+  if (!run || run.status !== "running") return null;
+  return run;
+}