Update winapp new to warn when scaffolding is taking longer than expected

[Zach Teutsch (zateutsch)]

Summary

Updates winapp new to provide clearer feedback when project scaffolding takes longer than expected.

• Keeps the existing scaffold spinner for the first 10 seconds.
• If scaffolding is still running, changes the status to:

  Still setting up the project; missing NuGet packages may be downloading or restoring…

• Uses elapsed time rather than parsing dotnet new output, preserving localized verbose and error messages.
• Leaves --json, --quiet, redirected output, CI, and other non-interactive behavior unchanged.

Fixes #752.

Testing

• Built src\winapp-CLI\winapp.sln in Release with 0 warnings and 0 errors.
• Ran 139 focused NewCommand tests successfully.
• Published the ARM64 CLI and used the published binary to create a real WinUI project with the installed template pack.
• Ran the PR review skill; no critical or high findings remained after validation and gut check.

[github-actions]

Build Metrics Report

Binary Sizes

Artifact	Baseline	Current	Delta
CLI (ARM64)	38.62 MB	38.63 MB	📈 +6.0 KB (+0.02%)
CLI (x64)	38.74 MB	38.74 MB	📈 +5.0 KB (+0.01%)
MSIX (ARM64)	16.02 MB	16.02 MB	📈 +1.5 KB (+0.01%)
MSIX (x64)	17.02 MB	17.02 MB	📈 +5.4 KB (+0.03%)
NPM Package	33.42 MB	33.42 MB	📈 +3.7 KB (+0.01%)
NuGet Package	33.46 MB	33.47 MB	📈 +6.6 KB (+0.02%)

Test Results

✅ 4579 passed, 5 skipped out of 4584 tests in 640.0s (+3 tests, +26.2s vs. baseline)

Test Coverage

✅ 89.1% line coverage, 82.4% branch coverage · ✅ no change vs. baseline

CLI Startup Time

55ms median (x64, winapp --version) · ✅ +9ms vs. baseline

Try This Build

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Updated 2026-08-14 21:20:33 UTC · commit 1ebb208 · workflow run

[Copilot]

Pull request overview

Updates winapp new to provide delayed scaffolding feedback while preserving non-interactive behavior.

Changes:

• Changes the spinner message after 10 seconds.
• Adds documentation for slow package restoration.
• Adds a timeout-value test and refreshes generated schema metadata.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
NewCommand.cs	Implements delayed spinner status.
NewCommandTests.cs	Tests the configured delay.
winapp-commands.ts	Updates generated schema version.
SKILL.md	Documents delayed scaffolding feedback.
docs/usage.md	Explains slow first-run behavior.

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