Refactor Zustand stores to use slices pattern for modularity

[Smartdevs17]

Context

Zustand stores have grown large and need modularization.

Current Limitation

Stores are monolithic with mixed concerns.

Expected Outcome

• Modular store slices per domain
• Lazy-loaded store modules
• Improved TypeScript inference
• Better devtools integration

Acceptance Criteria

• Store slices for each domain
• Lazy loading for non-critical stores
• TypeScript type inference for slices
• Devtools integration per slice
• Persist middleware per slice
• No performance regression
• Migration guide for existing usage

Technical Scope

• src/store/ - All Zustand stores
• app/stores/ - Extended stores
• src/hooks/ - Store access hooks
• src/components/ - Component integration

[drips-wave]

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

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