fix(chat): allow null score in citation types, align with API and SDK

[EricNGOntos]

Summary

Aligns Notebook citation types with the updated API contract where score can be null for agentic navigation-only results.

Background

The agentic retrieval route now returns null for score on chunks found only through KG navigation (no BM25 discovery score available). The Node SDK has been updated (RetrievalResult.score: number | null). The Notebook's internal types and view layer need to match.

Changes

src/domains/chat/types.ts

// Before
readonly score: number

// After
readonly score: number | null

src/domains/chat/view.ts

// Before — restoring persisted citations
score: getNumber(item.score) ?? 0

// After
score: getNumber(item.score) ?? null

0 is a valid real score; null correctly signals 'no score available'.

Testing

• All 420 Notebook unit tests pass ✅

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
knowhere-notebook-staging	Error		Jun 2, 2026 12:28am

1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
knowhere-notebook	Ignored		Jun 2, 2026 12:28am