[uyujkk]

Summary

Stage J8, done in one pass with design work (docs/development/UI-Structure-Plan.md, J8; docs/development/UI-Fluent-Design-Plan.md, "对话框（J8）"). Before this there were 39 places that built a ContentDialog, in 29 files. The inventory is in the plan.

Structure (no change in behaviour or text)

• ba0fd46: DialogService.
  • Every dialog now goes through it, which sets the window, theme and default style.
  • Only one dialog shows at a time; the queue logic is in Core (52ba67e, DialogQueueTests).
  • It offers message, confirm, danger confirm, error and text input.
• d80d38b: App.xaml split.
  • Colours stay in Themes/Tokens.xaml; control styles go to Styles/Controls.xaml, shared page surfaces to Styles/Pages.xaml.
  • Window-only styles move into the window's resources; five unused styles are removed.
• Pure moves into Dialogs/: 39c5cec 9 short confirmations, 32acfcf 8 previews before a change, 9eecc1c 16 forms and multi-step flows, including the 363-line Endfield settings.

Design (before → after)

• Buttons (c2e318d): 21 confirmations said "确定/Confirm" and 10 name prompts said "OK" → each main button names its action (Delete, Replace, Restore, Rename, Save, Install…).
• Destructive actions (c2e318d, 894c5a9):
  • 14 delete, remove and overwrite dialogs → a filled red button in a fixed danger colour that never follows the accent. They have no default button and keyboard focus is on Cancel, so Enter and Esc both cancel.
  • The workspace's "Remove from target folder" uses the same red.
  • This fixes primary and destructive buttons looking alike with a red system accent.
• Previews (5d128e3): restoring a preset, installing a bundle and the organized import showed one flat list → groups with counts (will add / will remove / kept / skipped).
• Forms (7c9c212):
  • The Endfield settings use card sections in the Windows Settings style.
  • Validation errors sit in red right under their field.
  • Multi-step flows show "Step n of m" and a progress bar.
  • Long content scrolls after 400 px.
• Errors (e16d7ae, 894c5a9): error notifications and error dialogs get "View details" (exception type and code, message, stack and log path) with a copy button.
• Command palette (a10bc83): headings for pages, characters, Mods and commands, plus a shadow.
• Title bar (dfb35db): below 1120 px wide the search box becomes an icon button that opens the palette.
• Not done: replacing some notice dialogs with an InfoBar or TeachingTip (Fluent plan item 4).

Fixes from the maintainer's try of the package

• e938a7a: step 2 of the getting-started tips opened outside the window. It opened while the page was still scrolling to the path settings and was placed beside that full-width card.

  • The page now scrolls first, then the tip opens.
  • A placement rule in Core (TipPlacementPolicyTests) opens it below its target, else above, else in the middle of the page, never to the side, and keeps it inside the window.

• 16d4c56: selection felt laggy. Every page switch re-applied all interface text, refreshed every page and saved settings before the new selection could show. The page and its selection now show first and the rest runs right after. The page-entrance animation is lighter (70% start opacity, 6 px, 110/130 ms); "Reduce motion" still turns it off.

  Median from a real mouse click until the selection shows:

  Where	Before	After
  Dashboard	54 ms	36 ms
  Mod workspace	88 ms	67 ms
  Online	56 ms	25 ms
  Updates	53 ms	43 ms
  Shortcuts	63 ms	42 ms
  Settings	97 ms	16 ms
  Settings card switch	119 ms	105 ms (not improved, cause unconfirmed)

  A delayed settings save was tried and dropped because it made no measurable difference.

• df0f391: a test that a setting changed just before closing is still there after a restart.

MainWindow partial files: 21,406 → 20,073 lines.

Test plan

• scripts\test-all.ps1: 1,753 Core tests, Release build 0 warnings, Core coverage 94.0% line / 88.3% branch
• UI tests 52/52 on the same build (-Application). New tests:
  • DangerConfirm_CancelIsTheDefaultAndEscDoesNothing.
  • Getting-started tips stay inside the window: zh/en/ru at 1000×800 with paths folded and expanded, Russian at 1400×900 and maximized, and real first installs.
  • A setting changed just before closing is kept.
• Code-style check
• Screenshots: 36 for the dialogs, palette and title bar (zh/en/ru × light/dark), plus 27 for the tips. No Russian truncation.
• Full package driven with the real mouse:
  • all three tip steps inside the window;
  • 26 page switches and 20 rapid clicks between the workspace lists;
  • 5 Updates view switches;
  • the delete, restore-preview and rename dialogs and the command palette.
  • No errors were logged.
• The Updates view switcher and the filter weren't measured: the tool couldn't detect the switch, and the test data doesn't show the filter.

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