test: verify Windows installer prompts in a real terminal

[cb-logesh]

The existing Windows installation smoke test sets CI=1 and skips interactive onboarding. Add a ConPTY test using the released 1.4.0 executable under Windows PowerShell 5.1 and PowerShell 7.

The test runs this checkout's unchanged installer with irm ... | iex, downloads and verifies the release, answers Yes/No/Enter through the terminal, and checks consent, global skill locations, alias setup, and completion within a deadline. All writes use temporary directories.

Initial run deliberately leaves install.ps1 unchanged to establish the current behavior before fixing any confirmed failures.

Validation: Python syntax, TypeScript typecheck, and 40 installer/workflow tests passed locally. Windows execution runs in the new required CI jobs.

Adds a Windows ConPTY integration test for the released installer in PowerShell 5.1 and 7. The test checks Yes, No, and Enter responses, installation results, and aliases. CI now requires this test. After consent, install.ps1 installs skills globally and prints the global-install command when consent is declined or onboarding is non-interactive.

[snyk-io]

✅ Snyk checks have passed. No issues have been found so far.

Status	Scan Engine	Critical	High	Medium	Low	Total (0)
✅	Open Source Security	0	0	0	0	0 issues
✅	Licenses	0	0	0	0	0 issues
✅	Code Security	0	0	0	0	0 issues
✅	Secrets	0	0	0	0	0 issues

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[coderabbitai]

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⚙️ Run configuration

• Configuration used: Organization UI
• Review profile: CHILL
• Plan: Enterprise
• Run ID: 1201bb95-d7df-449c-9dd8-9b8fc945098c

📥 Commits

Reviewing files that changed from the base of the PR and between 4fb1476 and 3a9caf6.

📒 Files selected for processing (5)

• .github/workflows/install-smoke.yml
• README.md
• install.ps1
• src/tests/README.md
• src/tests/native/windows-install-terminal.py

• Autopilot · Keep fixing CodeRabbit findings and required CI, and resolving merge conflicts

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[github-actions]

Test coverage

✅ Gate passed — all 77 files are at or above the 95% floor.

Status	Metric	Coverage	Threshold
✅	Functions	99.89%	95%
✅	Lines	99.53%	95%