fix(sandbox): use local app runtimes

[iamjr15]

Summary

• keep persistent project workspaces source-only while resolving Next and Expo from immutable snapshot runtimes
• redirect per-project dependencies and generated Next caches to local sandbox storage instead of object-store FUSE
• use immutable runtime binaries for managed servers and preserve runtime selection across restarts
• clean local runtime state on project reset/deletion and standardize dependency changes on pnpm
• promote the verified snapshot cheatcode-sandbox-viewer-bundle-2d91bd46205d-30812852154

Root cause

App preparation copied the template dependency tree into the persistent /workspace FUSE mount. A roughly 400 MB pnpm tree entered uninterruptible I/O and timed out before the DeepSeek request was made, leaving the Browser tab without a running preview.

Verification

• snapshot build, Trivy configuration/vulnerability/secret scans, runtime smoke test, Daytona publication, and verification passed
• pnpm turbo typecheck
• pnpm turbo lint
• pnpm turbo build --force
• pnpm typecheck
• pnpm lint
• pnpm architecture:check
• pnpm deadcode
• git diff --check

[vercel]

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1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
cheatcode	Skipped		Aug 3, 2026 12:33pm