Add multi-source Components V2 search and filters

[Mbeaulne]

Tophatting

Manual tophatting recommended because this adds the main search experience.

1. Turn on the Components V2 beta flag.
2. Open /components-v2.
3. Search for a known component.
4. Toggle source chips on and off and confirm the result list updates.

What changed

Adds real search results to Components V2.

The page now searches across:

• standard components
• published components
• registered libraries, such as GitHub libraries
• user components saved in the browser

It also adds source filter chips so users can show or hide sources.

Why

This is the main Components V2 search experience, but without AI reranking. Keeping AI out of this PR makes review easier.

Test plan

• Turn on the Components V2 beta flag
• Open /components-v2
• Search for a known standard component
• If available, confirm published/user/registered components appear
• Toggle source chips on and off and confirm results update
• Run pnpm exec vitest run src/routes/Dashboard/DashboardComponentsV2View.test.tsx
• Run pnpm run typecheck --pretty false

[github-actions]

🎩 Preview

A preview build has been created at: 05-27-components-v2-multi-source-search/e92b8d3

[Mbeaulne]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
Learn more

• Adds AI-generated component descriptions to Components V2 #2337
• Add AI rerank and detail actions to Components V2 #2323
• Add multi-source Components V2 search and filters #2322 👈 (View in Graphite)
• Add Components V2 route shell #2319
• Add component search support utilities #2318
• Extract shared component detail view #2317
• Add natural-language component rerank service #2321
• Add Agent Settings UI for AI search #2320
• Add BYOK component search settings hook #2316
• Add component search index service #2315
• master

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