[uyujkk]

Summary

Step 2 of finishing stage J (docs/development/UI-Structure-Plan.md): the Online and workspace pages call AppServices directly instead of going through window forwards. Behaviour is unchanged.

• Selected repository: RepositoryService.Selected instead of the window's forward.
• Theme brushes: a small page helper with the same ThemeTokens lookup the window used.
• Reduced animations: AppearanceService.ReduceAnimations. The window's setting now reaches the service right after its XAML loads, so it's set before any page could ask.
• Pickers and opening things: the folder and file pickers, and opening folders, file locations and links, moved unchanged into DialogService. The window passes its handle to the service and keeps one-line forwards for its own callers. The only edit is argument order: the message helper now takes the title first.

Members removed

• IOnlineHost 47 → 42: GetAppThemeBrush, ShouldReduceAnimations, PickFolderAsync, OpenExternalUrlAsync, GetSelectedRepository.
• IWorkspaceHost 77 → 70: GetAppThemeBrush, ShouldReduceAnimations, GetSelectedRepository, PickFolderAsync, PickFileAsync, OpenDirectory, OpenFileLocation.
• IShortcutOverlayActions stays at 22: none of its members is a pure forward to an existing service.
• Kept on purpose:
  • Density is a window field that reaches the service in a separate step, so removing it could change the value briefly.
  • Error reporting, saving and logging have no matching service yet.

Test plan

• scripts\test-all.ps1 on the final commit: 1,788 Core tests, Release build 0 warnings, Core coverage 94.0% line / 88.2% branch
• UI tests 64/64
• Code-style check (two unused using lines it found were removed)
• 114 Online and workspace screenshots, before and after (all languages, themes and sizes), match apart from the temporary path in the status bar
• Full package with the real mouse, no errors logged:
  • Online: 24 character switches and 24 opens and closes of details; details in a narrow window; Download reached the "choose download location" dialog and was cancelled with Esc, so nothing was downloaded; 48 page switches.
  • Workspace: 24 character and Mod selections; remove and redeploy; the preset restore preview, opened and cancelled; a rename; a column drag; the drawer 6 times; 48 page switches.

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