Restrict admin-only controls in Settings based on member role

[Lakes41]

Difficulty: Intermediate
Type: security

Background
The dashboard has "admin controls" per its description, and the Settings page (/settings) likely exposes guild/app-level configuration that shouldn't be editable by every member role.

Problem
There is no visible role-gating on Settings controls, so any authenticated (or even unauthenticated, given the app currently runs on mock data with no auth) user can view/change admin-only options.

Expected outcome
Settings controls are conditionally rendered/disabled based on the current mock user's role (e.g., owner/admin vs. member), with a clear "insufficient permissions" state for non-admins.

Suggested implementation

• Add a role field to the mock current-user data if not already present.
• Create a useCurrentUserRole hook (or context) that the Settings page and other admin-only UI can consume.
• Wrap admin-only sections in a permission-gated component that hides or disables controls and shows an explanatory message.
• Document the intended role model in docs/ or a new PERMISSIONS.md.

Acceptance criteria

• Non-admin mock users cannot see/edit admin-only settings
• Admin mock users retain full access
• Permission logic is centralized (not duplicated per-component)
• Behavior is documented for future real-auth integration

Likely affected files/directories

• apps/dashboard/app/settings/
• apps/dashboard/lib/mock-data.ts
• apps/dashboard/hooks/ or apps/dashboard/lib/permissions.ts (new)

[bridgetthnkechi87-cloud]

i would like to work on this issue

[grantfox-oss]

🦊 GrantFox — @bridgetthnkechi87-cloud 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 #292)
2. Your PR will be reviewed by the Adamantine-guild maintainers

Good luck! Track your progress on GrantFox.

[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox as part of the Official Campaign | FWC26 campaign!

@bridgetthnkechi87-cloud's PR #312 was approved and merged by @Lakes41.

🏆 @bridgetthnkechi87-cloud: You earned 35 FoxPoints for this contribution! Your current tier: Explorer (331 total points). Track your full progress on GrantFox.

👏 Great work, @bridgetthnkechi87-cloud! Keep contributing to Adamantine-guild.