sysadmin 346abc3676 fix(welcome): apply re-entrancy guard, scrub error output, lock nav during apply, offline-bundle fonts ...

- ApplyStep: guard StartAsync against double-invocation (_running check at top)
- ApplyService: replace raw StdErr dump with scrubbed message (exit code + first non-empty line, ≤200 chars)
- ApplyStep: SanitiseForDisplay strips newlines and caps error at 200 chars before rendering
- ApplyStep: add OnRunningChanged EventCallback<bool>; Routes.razor disables Back while _applyRunning
- Routes.razor: AdvanceToDone uses _stepTitles.Length - 1 instead of magic literal 5
- app.css: replace Google Fonts CDN @import with local @font-face rules; bundle DM Mono (300/400/500 + italic 300) and Inter (300/400/500) latin woff2 files under wwwroot/fonts/

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

2026-06-09 03:34:34 +01:00

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