Add a truncated wallet address component with copy-to-clipboard for the membership dashboard

[Lakes41]

Difficulty: Intermediate
Type: UI/UX

Background
The app's "Universal Membership" feature shows all active guild memberships and assigned roles in a unified dashboard, per the README, which necessarily displays wallet addresses.

Problem
Full wallet addresses are long, easy to misread on a small mobile screen, and hard to compare at a glance; there's no indication of a reusable truncation/copy pattern used consistently across the membership dashboard and guild detail screens.

Expected outcome
A shared WalletAddress component truncates addresses (e.g., 0x1234…abcd) by default, supports a tap-to-copy action with haptic/visual confirmation (toast or brief inline checkmark), and is used consistently everywhere a wallet address is displayed.

Suggested implementation

• Build a reusable WalletAddress component in src/ (or wherever shared UI components live) using expo-clipboard for copy support.
• Add a brief visual/haptic confirmation on copy (e.g., expo-haptics light impact + a toast).
• Replace any inline, ad hoc wallet-address rendering in the membership dashboard and guild detail screens with this shared component.
• Verify NativeWind dark/light styling for the component.

Acceptance criteria

• Wallet addresses render truncated by default across the dashboard and guild detail screens
• Tap-to-copy works and gives clear feedback
• Component is reused rather than duplicated across screens
• Verified in both light and dark mode

Likely affected files/directories

• src/ (new shared component)
• app/ (dashboard, guild detail screens)

[EngrEOOnoja]

I'd like to take this on. I'll build a reusable WalletAddress component with default truncation and tap-to-copy (via expo-clipboard, with haptic + toast confirmation), replace all ad hoc wallet-address renders in the dashboard and guild detail screens with it, and verify styling in both light and dark mode.

[grantfox-oss]

🦊 GrantFox — @EngrEOOnoja 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 #236)
2. Your PR will be reviewed by the Adamantine-guild maintainers

Good luck! Track your progress on GrantFox.