fix(orchestrator): recover from panics in run goroutines to avoid process crash and stuck 'running' task

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MMHQTtnQtQqL8muAXHr9kd

internal/orchestrator/orchestrator.go

@@ -124,6 +124,14 @@ func (o *Orchestrator) Run(ctx context.Context, taskID int64) (int64, error) {
 }
 
 func (o *Orchestrator) runAll(ctx context.Context, task store.Task, runID int64, accs []store.Account, srcEP, dstEP imapx.Endpoint) {
+	defer func() {
+		if r := recover(); r != nil {
+			slog.Error("run coordinator panicked", "task", task.ID, "run", runID, "panic", r)
+			_ = o.store.FinishRun(ctx, runID, "error", 0, 0, 0)
+			_ = o.store.SetTaskStatus(ctx, task.ID, "error")
+		}
+	}()
+
 	var (
 		mu                            sync.Mutex
 		totCopied, totSkipped, totErr int64
@@ -137,6 +145,17 @@ func (o *Orchestrator) runAll(ctx context.Context, task store.Task, runID int64,
 		go func(a store.Account) {
 			defer wg.Done()
 			defer func() { <-sem }()
+			defer func() {
+				if r := recover(); r != nil {
+					slog.Error("account worker panicked", "task", task.ID, "account", a.ID, "panic", r)
+					_ = o.store.SetAccountStatus(ctx, a.ID, "error")
+					o.hub.Publish(wshub.Event{Type: "error", TaskID: task.ID,
+						Data: map[string]any{"account_id": a.ID, "error": "internal panic"}})
+					mu.Lock()
+					totErr++
+					mu.Unlock()
+				}
+			}()
 			c, s, e := o.runAccount(ctx, task, runID, a, srcEP, dstEP)
 			mu.Lock()
 			totCopied += c