Add Post `category` field to schema — referenced in forms but missing from model

[3m1n3nc3]

Description

The CreateGiveawayModal form contains a category/type selector with values like "electronics", "clothing", etc. The validation.ts file has a validateCategory function. However, the Post model in schema.prisma has no category field. The API POST /api/posts does not accept or store a category. Category information entered by users is silently discarded.

More info

• Add category String? @db.VarChar(100) to the Post model.
• Generate and apply a migration.
• Update POST /api/posts to accept and store category.
• Update GET /api/posts to support ?category=electronics filtering.
• Predefined categories should be stored as an enum or a Category lookup table to ensure consistency.

[ikemHood]

@ikemHood has applied to work on this issue as part of the Stellar Wave Program's 3rd wave.

I would like to get this done

ETA: 3hrs

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

[drips-wave]

Congratulations, @Spagero763! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on March 30, 2026.

🧑‍💻 @Spagero763: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

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