[Improvement] Add a confirmation toast when copying a Stellar address anywhere in the app

[grantfox-oss]

Getting Started

1. Fork the repository: https://github.com/JointSave-org/Joint_Save
2. Clone your fork:

   git clone https://github.com/<your-username>/Joint_Save.git
   cd Joint_Save

3. Create a new branch:

   git checkout -b improve/copy-address-toast-consistency

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Overview

Different parts of the app handle "copy address" slightly differently — some show a brief icon-swap (checkmark) with no toast, others may not give feedback at all. This issue is about auditing every copy-to-clipboard action involving a Stellar address (wallet address in the header, contract address on the group detail page, member addresses in the member list) and making the confirmation feedback consistent everywhere.

Requirements

• Audit dashboard-header.tsx, group-details.tsx, and group-members.tsx for any copy-to-clipboard actions
• Standardize on: icon swaps to a checkmark briefly AND a toast confirmation appears (e.g. "Address copied"), consistent everywhere
• Use the existing toast system (useToast hook) rather than introducing a new pattern

Acceptance Criteria

• Every copy-address action in the audited files shows the same consistent feedback pattern
• No regressions to existing working copy buttons
• List every copy-to-clipboard location found during the audit in the PR description, even ones not in the three files explicitly named above

[gloskull]

Hi, I’d love to work on this issue. I have 4 years of experience across backend, frontend, full-stack, and smart contract development. I understand the task clearly and can deliver a clean, efficient, well-tested solution on time, with strong focus on code quality and maintainability. My PR will be submitted in under 10 hours.

[Cmitchelle7]

Good day I am a full stack developer and smart contract developer with over 6 years of experience and I have good practical knowledge on this kindly assign this to me

[Yerimahjr]

I would like to work on this issue
Please assign

[samjay8]

Hello Boss, please kindly assign this to me.

[Nursca]

Hello, I would like to work on this issue

[felladaniel36-hash]

​Hi maintainer, I would love to work on this issue. I can get started on it right away. Could you please assign it to me?

[grantfox-oss]

🦊 GrantFox — @samjay8 has been assigned to this issue as part of the Official Campaign campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #111)
2. Your PR will be reviewed by the JointSave-org 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 campaign!

@samjay8's PR #120 was approved and merged by @Sendi0011.

🏆 @samjay8: You earned 35 FoxPoints for this contribution! Your current tier: Explorer (541 total points). Track your full progress on GrantFox.

👏 Great work, @samjay8! Keep contributing to JointSave-org.