Move the autosave logic from Controller into AutosaveController

[mfl28]

Moves the autosave logic (#226) out of Controller into a package-private AutosaveController, following the pattern of the other controller collaborators (ImageFolderController, AnnotationIoController, …). Behavior is unchanged.

Structure

• AutosaveController gets what it acts on: Model, DialogService, the stage, RecentImageFolders and the AutosaveStore. It builds its AutosaveWriter from an executor.
• Its Operations interface covers what stays in Controller: storing the view's shapes in the model, checking whether a shape is being drawn, starting the restore import, opening a folder, running on the JavaFX thread, and the status bar (autosave time, failure message).
• The 5 s delay is a small Timer interface. The app uses a PauseTransition, and the unit tests use a fake one they fire by hand, so no JavaFX toolkit is needed.
• Controller calls it at each point where autosave is involved: after edit checkpoints, when a folder is opened or closed, after the restore import, on exit, and when the window is hidden. Controller goes from 1,733 to 1,558 lines.

Tests

• New AutosaveControllerTest (15 unit tests, real Model, mocked DialogService):
  • saving after the delay, and restarting the delay on further edits;
  • waiting while a shape is being drawn;
  • deleting after export or "quit without saving";
  • restoring or declining when a folder is opened, and a failed restore;
  • the startup offer (accepted, declined, no autosave);
  • stopping, closing the folder, and a failed save.
• AutosaveTests (UI) now go through controller.getAutosaveController().
• The full suite (306 tests) passes locally.

[sonarqubecloud]

Quality Gate passed

Issues
2 New issues
0 Accepted issues

Measures
0 Security Hotspots
92.6% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

❌ Patch coverage is 92.76316% with 11 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.23%. Comparing base (509e580) to head (b581538).

Files with missing lines	Patch %	Lines
...undingboxeditor/controller/AutosaveController.java	95.16%	1 Missing and 5 partials ⚠️
...mfl28/boundingboxeditor/controller/Controller.java	81.48%	4 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #228      +/-   ##
============================================
+ Coverage     90.05%   90.23%   +0.17%     
- Complexity     2374     2398      +24     
============================================
  Files           135      136       +1     
  Lines          8901     8939      +38     
  Branches        865      866       +1     
============================================
+ Hits           8016     8066      +50     
+ Misses          462      455       -7     
+ Partials        423      418       -5     

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