Add /vs/letta comparison page

[jy7lsna]

Description

Adds /vs/letta, a new comparison page contrasting Statewave against Letta's agent-managed memory model. Deliberately mirrors the structure, components, and tokens of the existing /vs/mem0 page — same section order (hero → gap → ranking signals → capability comparison → worked example → governance/receipts → benchmarks → migration → FAQ → CTA), just with the Letta-specific argument: Letta hands memory tools to the model itself (core/recall/archival tiers, agent-driven retrieval), Statewave assembles a deterministic, token-bounded context bundle mechanically with policy on the read path and an integrity-hashed receipt.

Related Issue

No linked issue this was scoped directly, not tracked against an existing ticket.

Type of Change

• 🐛 Bug fix (non-breaking change that fixes an issue)
• ✨ New feature (non-breaking change that adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to change)
• 📚 Documentation update
• 🔧 Maintenance (refactoring, dependencies, CI, etc.)
• 🧪 Test improvement

Changes Made

• New src/pages/StatewaveVsLettaPage.tsx: hero, memory-tier comparison, ranking-signal breakdown, full capability comparison table, worked support-agent example, governance/receipt section, benchmark section (Statewave's fixed LoCoMo/LongMemEval scores as gauges vs. Letta's own published Context-Bench leaderboard rendered as a score distribution, sourced from leaderboard.letta.com on 2026-08-12), migration cheatsheet, and FAQ.
• Wired the route into src/App.tsx (lazy-loaded), added a footer link in src/components/Footer.tsx, and added the /vs/letta entry (title, description, breadcrumb, OG type) to src/lib/seo-meta.ts.
• Added tests/vs-letta-page.test.tsx and extended tests/routes.test.tsx to cover the new route.

Testing

• Unit tests pass locally
• Integration tests pass locally
• Manual testing completed
• New tests added for new functionality

Test Commands Run

npx tsc --noEmit
npx vitest run tests/vs-letta-page.test.tsx tests/routes.test.tsx

Both clean (25/25). Also manually checked the page in-browser across light/dark and mobile/tablet/desktop widths (375–1920px).

Checklist

• My code follows the project's coding standards
• I have performed a self-review of my code
• I have commented my code where necessary
• I have updated documentation as needed
• My changes generate no new warnings or errors
• I have added tests that prove my fix/feature works
• All existing tests pass
• I have checked for breaking changes

Screenshots / Recordings

Additional Notes

• Rebased onto current origin/main before pushing this branch was originally cut from /vs/mem0's pre-squash history, so it needed re-basing to avoid the diff showing /benchmarks and /use-cases/grounded-shop-assistant as removed (they're already merged into main via Land #226, #228, #235 and #239 together #237 under different commit SHAs). Final diff is pure addition: 1438 insertions, 0 deletions.
• Ran the full suite once (npx vitest run) and saw 1–2 unrelated failures in tests/seo.test.tsx that don't reproduce in isolation and differ between runs pre-existing cross-file test flakiness, not caused by this change.

[vercel]

@jy7lsna is attempting to deploy a commit to the Statewave Team on Vercel.

A member of the Team first needs to authorize it.