Add schema validation to the guild/community creation form

[Lakes41]

Difficulty: Intermediate
Type: bug

Background
The /guilds page allows creating new guilds/communities, but form fields (name, description, member limits) currently appear to lack structured validation before being written to mock state.

Problem
Invalid guild data (empty names, oversized descriptions, negative member caps) can be submitted, producing malformed entries in the mock data store and inconsistent UI states.

Expected outcome
The guild creation/edit form validates all fields client-side with clear inline error messages before submission is accepted.

Suggested implementation

• Introduce zod (or similar) schema for the guild creation payload.
• Wire the schema into the form via react-hook-form + a zod resolver, or manual validation if the form is not already using a form library.
• Show field-level error messages and disable the submit button while invalid.
• Add the same schema to packages/integration-client if guild types are shared, so validation logic can be reused.

Acceptance criteria

• Empty/invalid name is rejected with a clear message
• Description length limit enforced
• Member cap must be a positive integer
• Valid submissions still create guilds correctly

Likely affected files/directories

• apps/dashboard/app/guilds/
• packages/integration-client/

[EmmanuelAdah]

Hi, I’d love to take this on.
Drawing on my React and TypeScript experience, I will build a shared Zod schema in packages/integration-client to enforce the guild data constraints. I'll then wire it directly into the dashboard's form via react-hook-form and a Zod resolver to surface real-time inline errors and prevent malformed state updates.
Let me know if this works, and I'll open a PR!

[grantfox-oss]

🦊 GrantFox — @EmmanuelAdah has been assigned to this issue as part of the Official Campaign | FWC26 campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #287)
2. Your PR will be reviewed by the Adamantine-guild maintainers

Good luck! Track your progress on GrantFox.