Group Creation Flow State Machine Extraction

[OlufunbiIK]

Complexity: High (200)
Problem: CreateGroupModal.tsx combines step transitions, form state, avatar selection, member curation, and creation mapping in one large component.
Scope: Extract the modal’s flow logic into a reusable reducer or hook so UI steps stay declarative.
Implementation guidance: Keep the modal component focused on rendering and move step progression plus draft state into a flow model.
Acceptance criteria: The group-creation modal no longer owns a large amount of mutable wizard logic inline.
Validation: Tests for step transitions, validation gating, reset on close, and creation payload generation.
Files to modify: frontend/src/components/SplitGroup/CreateGroupModal.tsx, frontend/src/components/SplitGroup/MemberList.tsx
Files to create: frontend/src/components/SplitGroup/useCreateGroupFlow.ts

[Menjay7]

@Menjay7 has applied to work on this issue as part of the Stellar Wave Program's 4th wave.

Hi! I’m a full-stack developer with a background in blockchain. I would love to take on this issue. I have extensive experience in both frontend and backend development and am confident I can implement a clean solution. Could you please assign this to me?

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[Babigdk]

@Babigdk has applied to work on this issue as part of the Stellar Wave Program's 4th wave.

Hi Maintainer,
I’d like to contribute to resolving this issue. I’m a software engineer with strong experience in computer science and believe I can add value here.
Thank you!

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