[Frontend] Build global search and discovery page

[Kaylahray]

Description

The app currently exposes post filtering through query params, but there is no dedicated search and discovery surface for finding posts, creators, or trending help requests.

User Story

As a visitor,
I want to search and discover relevant posts and people,
so that I can find giveaways, help requests, and community members quickly.

Requirements and Context

• Files: app/page.tsx, app/feed/page.tsx, app/components/navbar.tsx, app/app/api/posts/route.ts
• Add a dedicated search page with text search, category filters, type filters, and sort controls
• Reuse the existing q, type, sort, and filter query params from the posts API
• Include empty, loading, and no-results states

Suggested Implementation

// IN THE SEARCH PAGE
// 1. Read query params for q, type, sort, and filter.
// 2. Fetch /api/posts with those params.
// 3. Fetch /api/leaderboard for people discovery.
// 4. Render cards for posts, users, and trending topics.

Acceptance Criteria

• Users can search posts by keyword from a dedicated page.
• Users can filter search results by giveaway and request type.
• No-results state is shown when nothing matches.

Submission Guidelines

• Branch: feat/search-discovery-page
• Depends on: GET /api/posts query filtering
• PR: feat(frontend): add global search and discovery surface

[SaintSammi]

@SaintSammi has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

I want to work on this pls

ℹ️ Repo Maintainers: To accept this application, review their application or assign @SaintSammi to this issue.

[drips-wave]

Congratulations, @SaintSammi! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

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