Re-register slept terminal sessions on wake

[nwparker]

Summary

• re-register a woken slept session in activeSessionIds and re-attach its history writer when spawn() returns the cached sleep cold-restore payload
• add HistoryManager.reopenSession: registers the writer without deleting checkpoint.json (still the only recovery data until the next tick) and clears endedAt/exitCode so future sleep captures can cold-restore again

Why

Sleep kills the daemon PTY; the exit event closes the session history (removes the writer, sets meta.endedAt). The wake spawn() hit the coldRestoreCache early return — added for StrictMode double-mounts, where the first call had already registered everything — and skipped activeSessionIds.add plus all history re-registration. After wake:

• markSessionDirty no-ops, so periodic checkpoints stop for the woken terminal
• the next sleep's checkpoint() silently no-ops (no writer) and detectColdRestore returns null (endedAt set), so the second wake restores a blank terminal — post-wake scrollback is lost
• hasPty() stays false, degrading the pty:writeAccepted path for woken panes

Both re-registrations are idempotent, so the StrictMode double-mount path is unaffected.

Validation

• New regression test cold restores the second sleep/wake cycle with post-wake output fails without the product fix (at the hasPty assertion) and passes with it
• pnpm exec vitest run --config config/vitest.config.ts src/main/daemon/daemon-pty-adapter.test.ts passed: 63 tests
• npx playwright test tests/e2e/terminal-sleep-wake-restore.spec.ts --config tests/playwright.config.ts --project electron-headless --workers=1 passed 1/1 on a fresh build including this fix
• pnpm exec oxlint on touched files passed
• pnpm run typecheck passed
• git diff --check passed

Made with Orca 🐋

[ghost]

Ready to review this PR? Stage has broken it down into 3 individual chapters for you:

	Title
1	Add reopenSession to HistoryManager
2	Re-register sessions during wake-up spawn
3	Verify multi-cycle sleep/wake restoration

_{Chapters generated by Stage for commit b2e8cf3 on Jun 17, 2026 9:10am UTC.}

[nwparker]

Closing as superseded by merged PR #7214 (merge e84a8dd), which explicitly revived the complete term-speed-2 model/view chain into current main and then added newer scheduler, producer flow-control, snapshot, and reliability work. This old component/rollup branch no longer has an independent delta to rebase.