feat(PRLT-1233): interactive menu e2e tests for work start, ticket move, session attach, orchestrator + --json bypass

[chrismcdermut]

Summary

• Adds the ticket-required interactive flows to interactive-menu.test.ts: prlt work start (ticket dropdown / source picker), prlt ticket move (ticket picker → column picker), prlt session attach (session list / empty state), and prlt orchestrator (action menu).
• Adds a --json non-interactive bypass suite that asserts those four commands never render an inquirer menu (no ❯ indicator, no arrow-key hint) when invoked with --json.
• Refactors InteractiveTestSession to expose three pure helpers (matchesPattern, isTmuxSpecialKey, shellEscape) and adds test/unit/interactive-test-session.test.ts covering them — pre-commit hook compliance and a real safety net for the harness behavior that doesn't need a live tmux server.

Background — PRLT-1233

The existing tmux-driven harness (InteractiveTestSession) and interactive-menu.test.ts were already in main. This PR extends the suite to cover the specific test cases the ticket calls out (interactive flows that agents in non-TTY sessions can't otherwise exercise) and adds the --json bypass coverage that proves the agent path stays non-interactive.

Test plan

• pnpm --filter @proletariat/cli test:unit — confirms 25 new harness unit tests pass
• pnpm --filter @proletariat/cli test:e2e:interactive (in a tmux + prlt environment with seeded HQ) — confirms the new e2e cases pass and the --json cases assert no interactive menu rendered
• pnpm --filter @proletariat/cli build — typecheck

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