fix: log application update checks

app/adapters/system/update.py

@@ -379,7 +379,8 @@ class SystemUpdateManager(metaclass=SingletonClass):
         if not release:
             raise RuntimeError("未找到可用的 v3 稳定版本")
         version = str(release["tag_name"])
-        has_update = compare_version(version, "gt", get_app_version()) is True
+        current_version = get_app_version()
+        has_update = compare_version(version, "gt", current_version) is True
         self._write_item(
             _APPLICATION,
             state="available" if has_update else "idle",
@@ -395,6 +396,10 @@ class SystemUpdateManager(metaclass=SingletonClass):
             can_update=has_update,
             can_install=False,
         )
+        if has_update:
+            logger.info(f"发现 MoviePilot 主程序更新：{current_version} -> {version}")
+        else:
+            logger.info(f"MoviePilot 主程序已是最新版本：{current_version}")
 
     def _check_resources(self) -> None:
         """查询当前平台认证资源和索引资源的最新版本。"""

tests/test_system_update_manager.py

@@ -30,6 +30,7 @@ def _response(payload, status_code=200):
 
 def test_check_exposes_new_stable_release(monkeypatch, tmp_path):
     manager = _manager(monkeypatch, tmp_path)
+    logs = []
     releases = [
         {"tag_name": "v3.2.0-beta", "prerelease": True, "draft": False},
         {
@@ -43,6 +44,7 @@ def test_check_exposes_new_stable_release(monkeypatch, tmp_path):
     ]
     monkeypatch.setattr(manager, "_request", lambda: SimpleNamespace(get_res=lambda _url: _response(releases)))
     monkeypatch.setattr(update_module, "get_app_version", lambda: "v3.0.0")
+    monkeypatch.setattr(update_module.logger, "info", logs.append)
 
     status = manager.check("application")
 
@@ -50,6 +52,29 @@ def test_check_exposes_new_stable_release(monkeypatch, tmp_path):
     assert status.version == "v3.1.0"
     assert status.release_notes == "changes"
     assert status.can_update is True
+    assert logs == ["发现 MoviePilot 主程序更新：v3.0.0 -> v3.1.0"]
+
+
+def test_check_logs_when_application_is_current(monkeypatch, tmp_path):
+    manager = _manager(monkeypatch, tmp_path)
+    logs = []
+    releases = [
+        {
+            "tag_name": "v3.0.0",
+            "name": "MoviePilot v3.0.0",
+            "prerelease": False,
+            "draft": False,
+        }
+    ]
+    monkeypatch.setattr(manager, "_request", lambda: SimpleNamespace(get_res=lambda _url: _response(releases)))
+    monkeypatch.setattr(update_module, "get_app_version", lambda: "v3.0.0")
+    monkeypatch.setattr(update_module.logger, "info", logs.append)
+
+    status = manager.check("application")
+
+    assert status.state == "idle"
+    assert status.can_update is False
+    assert logs == ["MoviePilot 主程序已是最新版本：v3.0.0"]
 
 
 def test_scheduled_check_failure_stays_silent(monkeypatch, tmp_path):