Implement invoice filter and sort controls for the dashboard

[Kingsman-99]

Overview

The invoice list currently shows all invoices with no ability to filter or sort. Add a full filter and sort UI above the invoice grid.

Acceptance Criteria

• Filter bar: status dropdown (All, Active, Funded, Expired, etc.), role toggle (Created / Received), date range picker
• Sort dropdown: Newest, Oldest, Amount (high → low), Deadline (soonest)
• Active filters shown as dismissible chips below the filter bar
• "Clear all filters" link appears when any filter is active
• Filter/sort state reflected in URL search params (?status=Active&sort=deadline)
• Zero results state with "No invoices match your filters — Clear filters" CTA

[simplicityf]

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

As an experience full stack engineer, I would like to make use of my skills to solve this issue

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

[janipauwels-sys]

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

can you please assign these issue to me

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

[grantfox-oss]

🦊 GrantFox — @janipauwels-sys 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 #310)
2. Your PR will be reviewed by the Stellar-split maintainers

Good luck! Track your progress on GrantFox.

[drips-wave]

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

🧑‍💻 @janipauwels-sys: 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

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[grantfox-oss]

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

@janipauwels-sys's PR #357 was approved and merged by @Kingsman-99.

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

👏 Great work, @janipauwels-sys! Keep contributing to Stellar-split.

[drips-wave]

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

😎 @janipauwels-sys: You earned 200 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.

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