feat(cli): add interactive sessions browser

[iamtoruk]

Summary

• replace the long sessions pager with a responsive Ink browser on interactive terminals
• add fixed headers, selected-row details, viewport navigation, search, and provider filtering
• sanitize home-directory project slugs and show concise session, worktree, and model labels
• preserve JSON and non-TTY output, with --no-pager as the static table escape hatch

Validation

• TypeScript: npx tsc --noEmit
• Focused tests: npx vitest run tests/sessions-report.test.ts
• CLI build: npm run build:cli
• Real TTY launch at 80 columns with local session data
• Full suite: 2443 passed; one unrelated existing durable-cache parity test fails (100 vs 101.08), and jsdom is absent for optional browser environments