[codex] add starter tracks

[Marve10s]

What changed

• Adds a Starter Tracks model shared by the homepage and builder presets panel.
• Adds homepage starter-track cards that deep-link into /new with the matching preset selected.
• Adds a dedicated Starter tracks section inside the presets panel, filtered by ecosystem.
• Adds coverage that every starter track points at an existing preset, guide, and docs page.
• Tightens generated Python FastAPI and Rust backend templates after running real starter-track scaffold checks.

Why

Starter Tracks give new users a more intent-driven path into Better Fullstack: SaaS app, AI agent app, REST API, Java API, Rust backend, mobile app, and internal tool. That should reduce choice overload while still landing users in the existing preset/customization flow.

Validation

• apps/web: bun test test/starter-tracks.test.ts
• apps/web: bun run typecheck
• apps/web: bun run lint passes with existing warnings, no errors
• Pre-commit lint hook passed
• Real generated project checks:
  • SaaS, AI Agent, Internal Tool: scaffold, install, dev-check, build, typecheck passed
  • Mobile App: scaffold, install, build, typecheck passed
  • REST API: scaffold, uv sync --all-extras, compile check, ruff check . passed
  • Rust Backend: scaffold, cargo check, cargo clippy -- -D warnings passed
  • Java API: scaffold passed; Gradle test could not run locally because no Java runtime is installed on this machine

[vercel]

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Project	Deployment	Actions	Updated (UTC)
better-fullstack-web	Ready	Preview, Comment	May 22, 2026 7:34pm