fix zombie leak, add quiet-hours toggle, improve query reply, configurable router threshold, JS dashboard

internal/phraser/llmphraser.go

@@ -126,12 +126,15 @@ func (p *LLMPhraser) start(ctx context.Context) error {
 		return nil
 	case err := <-errCh:
 		_ = cmd.Process.Kill()
+		_ = cmd.Wait()
 		return fmt.Errorf("llm: server output: %w", err)
 	case <-ctx.Done():
 		_ = cmd.Process.Kill()
+		_ = cmd.Wait()
 		return ctx.Err()
 	case <-time.After(60 * time.Second):
 		_ = cmd.Process.Kill()
+		_ = cmd.Wait()
 		return fmt.Errorf("llm: server did not start within 60s")
 	}
 }
@@ -140,6 +143,7 @@ func (p *LLMPhraser) Close() error {
 	p.cancel()
 	if p.cmd != nil && p.cmd.Process != nil {
 		_ = p.cmd.Process.Kill()
+		_ = p.cmd.Wait() // reap the process — without Wait, the child becomes a zombie
 	}
 	p.wg.Wait()
 	return nil