Add helper for formatting wallet address as shortened display string

[Chucks1093]

Summary

Full Stellar wallet addresses are too long to display in the UI. A shared helper that shows the first 4 and last 4 characters separated by ellipsis (e.g. GABC...XY12) should be used consistently across all address displays.

Scope

• Add shortenAddress(address: string): string utility
• Return first 4 + ... + last 4 characters
• Return the full address unchanged if it is shorter than 10 characters
• Add unit tests for: standard length, short address, empty string guard

Acceptance Criteria

• Standard Stellar address returns correctly shortened form
• Addresses shorter than 10 characters are returned as-is
• Unit tests cover all cases

ETA: 12 hours

---

Coordinate on Telegram

[SamixYasuke]

@SamixYasuke has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi maintainer, I'd like to work on this by adding the shorten address utility with the specified edge case handling and unit tests covering standard, short, and empty string inputs. Can I get this assigned? Thanks

ℹ️ Repo Maintainers: To accept this application, review their application or assign @SamixYasuke to this issue.

[yunus-dev-codecrafter]

Hi! I've carefully reviewed the entire task description and fully understand the requirements and expected outcome.
I have experience working on similar tasks and I'm confident I can complete this within about an hour. I'd be happy to take ownership of this issue and submit a clean, well-tested solution promptly.
If it's available, please assign it to me. Thank you!

[AbuJulaybeeb]

Hi Maintainer, haven reviewed the description of the issue, and well experienced with Js Library,
I would like to hop on this issue

[Topmatrixmor2014]

@Topmatrixmor2014 has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi maintainer, I would love to work on this issue. I have studied the details of the issue description and I understood the requirements. I shall deliver with qualitative feedback and promptly.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Topmatrixmor2014 to this issue.

[pixels26]

@pixels26 has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Please assign me . Thank you

ℹ️ Repo Maintainers: To accept this application, review their application or assign @pixels26 to this issue.

[drips-wave]

Congratulations, @pixels26! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 30, 2026.

🧑‍💻 @pixels26: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

Warning

When opening a PR, please link it to this issue to ensure it gets tracked accurately. Points are awarded when this issue is marked as completed by the maintainer.

🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.

🌊 Happy Wave 🌊

[grantfox-oss]

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

@pixels26's PR #447 was approved and merged by @Chucks1093.

🏆 @pixels26: You earned 35 FoxPoints for this contribution! Your current tier: Explorer (191 total points). Track your full progress on GrantFox.

👏 Great work, @pixels26! Keep contributing to accesslayerorg.

[drips-wave]

This issue has been completed by @pixels26 as part of the Stellar Wave Program's 6th Wave 🥳

😎 @pixels26: You earned 150 Points for completing this issue! After the current Wave ends, you'll be eligible for a percentage of the Wave's reward pool based on the percentage of total points you've earned. Learn more here. You can also Leave a review to share your experience working on this issue.

🧑‍💻 Repo maintainers: How'd the contributor do? Leave a review to share your experience working with them.