feat(ProofOfHeart-frontend): performance-uselivecampaignfunding-polls-every-n

[Caneryy]

Closes #571

Summary

Replaces useLiveCampaignFunding polling with Soroban contribution_made event streaming via the existing sorobanEvents.ts infrastructure.

Changes

• useLiveCampaignFunding — no more setInterval polling; live amount updates from streamed events, reconciled on get_campaign refetch
• useCampaignContributionEvents — subscribes to contribution_made with cursor-based streaming, deduplication by event id, pauses when tab is hidden
• sorobanEvents.ts — extended with subscribeContributionMadeEvents and contribution amount helpers
• Tests — coverage for event parsing and subscription logic

Rebase note (per @davidmaronio review)

Rebased onto latest main to clear stale lint failures from files this PR does not touch. Lint and format checks now pass on the rebased branch.

Acceptance criteria

• Polling replaced with Soroban event streaming
• Uses existing sorobanEvents.ts infrastructure
• Event deduplication on reconnect
• Reconciliation via get_campaign refetch still works
• Lint + Prettier pass after rebase onto main

Test plan

• npm run lint — 0 errors
• npm run format:check — passes
• sorobanEvents.test.ts unit tests pass
• Manual: campaign detail page shows live funding increments without polling

Known CI status

Playwright E2E remains red — confirmed upstream shared issue, not introduced by this PR (@davidmaronio).

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[sshdopey]

Auto-review failed (API error). Leaving PR for human review.

[Caneryy]

@davidmaronio review and merge please

[davidmaronio]

the live-campaign-funding polling refactor looks clean and doesn't introduce any lint hits of its own, the lint failure is stale, it's flagging warnings in files you don't touch because the branch predates their fixes on main. rebase onto main and lint clears; after that the only red is our shared broken Playwright e2e.

[sshdopey]

Auto-review failed (API error). Leaving PR for human review.

[sshdopey]

Auto-review failed (API error). Leaving PR for human review.

[Caneryy]

All checks passed now. please review and merge @davidmaronio

[davidmaronio]

nice migration: the cursor-based subscribeContributionMadeEvents with backoff on errors, immediate re-poll on full batches, dedup by event id, and the visibility gate in the hook are all solid, and the tests cover the streaming loop and unsubscribe path. CI is green and the branch is clean.

two small notes:

1. src/lib/sorobanEvents.ts:145: the default idle interval drops from the previous 5s poll to 2s, which increases rpc load when nothing is happening. the env override still works, but consider keeping 5s as the idle default since this PR is billed as a performance win.
2. heads up that #849 migrates this same hook onto the shared eventSubscriber. whichever lands second will need a rebase; flagging so the authors can coordinate.