feat: friendlyError Extended with Soroban XDR Diagnostic Extraction and Error Telemetry Hook

[enniedokz]

Close #454
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[Copilot]

Pull request overview

This PR aims to improve frontend error reporting for Soroban simulation failures by introducing parseContractError, wiring it into the transaction build/simulation flow, and adding an error-telemetry hook plus an end-to-end Vitest integration test for the subscribe → pay-per-use → cancel journey. It also includes a few contract-side fixes/adjustments (subscription struct cloning, grace-period governance call updates, and a contract error enum update), along with dependency/lockfile updates.

Changes:

• Frontend: add parseContractError + new useErrorTelemetry() hook; integrate parsing into simulation/build paths.
• Frontend: add an end-to-end integration test with Freighter + Stellar mocks for subscribe → pay-per-use → cancel.
• Contract: minor subscription cloning changes, grace-period propose/commit usage in tests, and error enum adjustments.

Reviewed changes

Copilot reviewed 19 out of 21 changed files in this pull request and generated 11 comments.

Show a summary per file

File	Description
package.json	Adds root-level TypeScript dependency (potentially redundant vs frontend/).
package-lock.json	Lockfile updates for new root dependency.
frontend/src/utils/errors.ts	Extends CONTRACT_ERRORS and adds parseContractError().
frontend/src/test/errors.test.ts	Adds unit tests for parseContractError().
frontend/src/stellar.ts	Integrates contract error parsing into simulation/build flows; refactors some helpers.
frontend/src/hooks/useStellarBalance.ts	Updates getBalance call signature usage.
frontend/src/hooks/useErrorTelemetry.ts	Adds telemetry hook that counts payflow:error CustomEvents.
frontend/src/components/SubscriptionHistory.tsx	Minor comment removal in UI component.
frontend/src/components/SubscriptionCard.tsx	Adds optional onCancel/onPause hooks and updates cancel button behavior.
frontend/src/components/PayPerUseForm.tsx	Cleans up duplicated/incorrect imports.
frontend/src/components/Dashboard.tsx	Moves cancellation confirmation to Dashboard-level modal and adds keyboard shortcut handling.
frontend/src/tests/stellar.test.ts	Updates fetchEvents test expectations to match return shape usage.
frontend/src/tests/integration/subscribe-pay-cancel.test.tsx	Adds full integration test with fake timers and mocked infrastructure.
frontend/src/tests/mocks/stellar.ts	Adds a manual mock module for Stellar interactions used by tests.
frontend/src/tests/mocks/freighter.ts	Adds a manual Freighter wallet mock used by tests.
frontend/package-lock.json	Frontend lockfile changes (dependency graph adjustments).
contract/src/test.rs	Updates grace period test to use propose/commit flow; minor variable naming tweak.
contract/src/lib.rs	Avoids moves by cloning addresses when building/storing subscriptions.
contract/src/grace.rs	Adds set_grace_period storage + TTL extension and cleans up whitespace.
contract/src/events.rs	Removes duplicate stubbed publish_paused definition.
contract/src/errors.rs	Adjusts/extends ContractError enum discriminants and adds MetadataLabelTooLong.

Files not reviewed (1)

• frontend/package-lock.json: Generated file

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