feat(js/frontend): add error tracking

[nikitayutanov]

No description provided.

[Copilot]

Pull request overview

Adds Sentry-based error tracking to the frontend, including global initialization, a Sentry-backed error boundary, and explicit exception reporting in key user flows. This integrates with the existing Vite env configuration and deploy pipeline so Sentry can be enabled via VITE_SENTRY_DSN.

Changes:

• Add @sentry/react dependency and initialize Sentry (with Replay integration) when VITE_SENTRY_DSN is present.
• Replace the custom React error boundary with Sentry’s ErrorBoundary.
• Capture exceptions in several feature flows (swap, token tracker, faucet, network switching) and wire DSN through Docker/GitHub Actions env.

Reviewed changes

Copilot reviewed 14 out of 15 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
yarn.lock	Locks new Sentry dependency tree.
js/frontend/package.json	Adds @sentry/react dependency.
js/frontend/src/main.tsx	Initializes Sentry using SENTRY_DSN and enables Replay integration.
js/frontend/src/components/layout/error-boundary/error-boundary.tsx	Swaps custom boundary for Sentry ErrorBoundary with a fallback UI.
js/frontend/src/features/token-tracker/components/tokens-card/tokens-card.tsx	Reports burn/convert failures to Sentry.
js/frontend/src/features/swap/hooks/use-swap-form.ts	Reports swap submission errors to Sentry.
js/frontend/src/features/swap/components/relay-tx-button/relay-tx-button.tsx	Reports manual relay failures to Sentry (Vara→Eth path).
js/frontend/src/features/swap/components/pay-vara-fee-button/pay-vara-fee-button.tsx	Reports fee payment failures to Sentry.
js/frontend/src/features/faucet/components/get-balance-button/get-balance-button.tsx	Reports faucet request + Turnstile verification errors to Sentry.
js/frontend/src/context/network-type/provider.tsx	Reports network switch failures to Sentry.
js/frontend/src/consts/env.ts	Adds SENTRY_DSN sourced from VITE_SENTRY_DSN.
js/frontend/src/consts/index.ts	Re-exports SENTRY_DSN.
js/frontend/Dockerfile	Adds VITE_SENTRY_DSN build arg/env propagation.
js/frontend/.env.example	Documents VITE_SENTRY_DSN.
.github/workflows/deploy-frontend.yml	Passes VITE_SENTRY_DSN secret as a Docker build-arg.

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