fix: installer stops the service reliably before upgrading and retries locked file copies; 1.1.5

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

installer/setup_main.py

@@ -26,6 +26,7 @@ import os
 import shutil
 import sys
 import threading
+import time
 import tkinter as tk
 from pathlib import Path
 from tkinter import filedialog, messagebox, ttk
@@ -141,8 +142,7 @@ def upgrade_flow(*, install_dir_path: str | None = None, progress: Callable[[str
     version = setup_version()
     progress("Atualizando o Agent (identidade e credenciais preservadas)…")
     if common.service_installed():
-        common.stop_service()
-        common.wait_service_state("STOPPED", timeout=45)
+        common.ensure_service_stopped()
     extract_payload(install)
     common.upgrade_agent_env(install, version)
     common.install_service(install)
@@ -175,7 +175,14 @@ def extract_payload(install: Path) -> None:
         if not source.exists():
             raise RuntimeError(f"bundled payload missing: {source}")
         if source.is_dir():
-            shutil.copytree(source, dest, dirs_exist_ok=True)
+            for attempt in range(5):  # a just-stopped host can still hold files for a moment
+                try:
+                    shutil.copytree(source, dest, dirs_exist_ok=True)
+                    break
+                except PermissionError:
+                    if attempt == 4:
+                        raise
+                    time.sleep(3)
         else:
             dest.parent.mkdir(parents=True, exist_ok=True)
             shutil.copy2(source, dest)