Align remote source processed row state

[suguanYang]

Summary:

• Show unlocalized remote sources as Processed without chunk counts.
• Default remote source rows to included and let ready remote rows use the normal checkbox toggle path.
• Decode unchecked knowhere-doc source IDs into retrieval exclude document IDs.

Verification:

• pnpm test src/components/source-row.test.ts src/domains/sources/route-service.test.ts src/domains/chat/index.test.ts
• pnpm typecheck (passes; prints existing Effect.void diagnostic in src/domains/sources/counts.ts)

[vercel]

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Project	Deployment	Actions	Updated (UTC)
knowhere-notebook-staging	Ready	Preview, Comment	Jul 5, 2026 10:08am

1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
knowhere-notebook	Ignored	Preview	Jul 5, 2026 10:08am