Adapt Notebook to SDK result-layout parsed storage

[suguanYang]

Summary:

• add page-asset display/read flows and SDK-first chunk/page-asset routes for parsed documents
• align BlobParsedDocumentStorage with the SDK object-path ParsedDocumentStorage interface and result-relative asset paths
• make page-mode source detection/display lazy and tolerant of unavailable remote/display reads
• keep the app/page route export surface valid for Next generated type checks
• install published @ontos-ai/knowhere-sdk@2.1.2
• validate chat citation refs against resolved evidence source metadata and avoid fallback source chips from unselected retrieval results

SDK note:

• @ontos-ai/knowhere-sdk@2.1.2 is installed from the npm registry and locked in pnpm-lock.yaml.

Tests:

• pnpm exec vitest run src/agent-harness/validator.test.ts src/domains/chat/index.test.ts
• pnpm exec vitest run src/agent-harness/runtime.test.ts src/agent-harness/knowhere-text.test.ts
• pnpm exec vitest run src/domains/chat/service.test.ts
• pnpm test
• pnpm run typecheck
• pnpm lint
• git diff --check

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Project	Deployment	Actions	Updated (UTC)
knowhere-notebook-staging	Ready	Preview, Comment	Jul 7, 2026 8:58pm

1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
knowhere-notebook	Ignored	Preview	Jul 7, 2026 8:58pm