Fix critical evolve, rollback, and setup regressions

[cursor]

Summary

• Prevent dirty working trees from starting adopt manual changes and AI evolve concurrently; prompt users to resolve/adopt through the existing guarded dialog first.
• Keep committable rollback processing and change-map refresh tied to rebuild success/finalize instead of unlocking immediately after activation starts.
• Preserve the displayed setup host when users click Next without reselecting it.
• Gate E2E permission skip env vars to debug builds and require truthy VITE_NIXMAC_SKIP_PERMISSIONS values.

Test Plan

• bun -F native test:unit -- src/components/widget/promptinput/prompt-input.test.tsx src/components/widget/steps/setup-step.test.tsx src/hooks/use-rollback.test.ts
• bun -F native build
• Attempted: cargo +stable test --locked --manifest-path apps/native/src-tauri/Cargo.toml system::permissions::tests::vite_permission_skip_requires_truthy_value (blocked by existing Tauri compile errors in apps/native/src-tauri/src/main.rs and apps/native/src-tauri/src/peek.rs before this test runs)

Docs

• Docs updated (companion PR in darkmatter/nixmac-web: #___)
• No docs update needed

  

[github-actions]

	Warnings
⚠️	PR is marked WIP / draft — do not merge until ready for review.
⚠️	Please assign this PR to someone (usually yourself).

📋 PR Overview

Lines changed	346 (+338 / -8)
Files	3 added, 4 modified, 0 deleted
Draft / WIP	yes
Has Test Plan	yes
New UI components	no
New Storybook stories	no
New Rust modules	no
New TS source files	no
New tests	yes (3)
package.json touched	no
Cargo.toml touched	no
Infra / CI touched	no

🔬 Coverage

Report	Lines	Statements	Functions	Branches
apps/native/coverage/coverage-summary.json	19.1%	19.1%	31.7%	54.6%

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