perf: analyze and document frontend bundle size (embedded circuit artifacts)

[tech-adrian]

Area
frontend/src/circuits/, frontend/public/circuits/

Problem
The frontend embeds compiled circuit artifacts (frontend/src/circuits/*.json / frontend/public/circuits/*.json) for client-side proving. These are typically large, and there's no documented bundle-size analysis or lazy-loading strategy — a large initial payload directly hurts "Consumer-Grade UX" on slower connections.

Proposed change
Run @next/bundle-analyzer (or similar) against a production build, document current sizes, and lazy-load circuit artifacts per-page (deposit only needs shielded_pool.json, compliance only needs compliance.json/disclosure.json) instead of bundling all of them globally if that isn't already the case.

Acceptance Criteria

• Bundle analysis report generated and committed/linked in the PR
• Circuit artifacts confirmed (or made) to load per-page rather than globally on first load
• Relevant tests (just test, pnpm test, cargo test, or nargo test as applicable) pass locally and in CI
• A screenshot or short screen recording is attached to the PR showing the change working (the bundle analyzer report before/after) — required before this can be merged.

Open your PR against the dev branch, not main. All active development merges into dev.

Discuss this issue / coordinate work: join the DShield contributor Telegram group: https://t.me/+SiGHH24No9U2MDJk

[Lspnjr1]

Hello maintainers,

I’d like to take on this issue. I’ve gone through the issue details and believe I can implement the required changes effectively. I’ll ensure the solution is properly tested, follows the project’s conventions, and submit a pull request as soon as it’s ready.

Please assign this issue to me if it’s available. Thank you!

[glorious21-coder]

Hi there, I carefully reviewed the issue details and I’m confident I can deliver a clean and efficient solution.

[benzy018]

Hello, Maintainer.

I have experience analyzing frontend performance and optimizing application bundles, and I'd like to work on this issue. I'll analyze the frontend bundle size with a focus on embedded circuit artifacts, document the findings and optimization opportunities, verify the results, and submit a clean Pull Request as soon as possible. I would appreciate being assigned this issue. Thank you in advance.

[grantfox-oss]

🦊 GrantFox — @benzy018 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 #27)
2. Your PR will be reviewed by the Dshield-xyz 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!

@benzy018's PR #86 was approved and merged by @tech-adrian.

🏆 @benzy018: You earned 35 FoxPoints for this contribution! Your current tier: Explorer (226 total points). Track your full progress on GrantFox.

👏 Great work, @benzy018! Keep contributing to Dshield-xyz.