CIP-0146 Wallet Discovery, Sign-off Transaction Visualization, Expanded Playwright Coverage and CI Improvements

[Andre-Diamond]

Wallet Discovery and Import Improvements

• Add a Discover tab for the CIP-0146 wallet import flow.
• Add stake-key and DRep-key recovery during wallet import.
• Add base-address recovery for co-signers and improve address assignment.
• Add an advanced signer address-adjustment option to the import flow.

Expanded Playwright Browser Coverage

• Add browser tests for transaction recipient and amount validation.
• Add notification settings tests covering email preferences and persistence.
• Add proxy-management UI tests.
• Add tests for rejected wallet signing during transaction proposals and approvals.
• Add responsive smoke tests for critical screens and mobile viewports.
• Add staking UI tests covering actions for different account states.
• Add wallet access-control tests for protected wallet pages.
• Add and update the Playwright test plan and local-running documentation.

CI and Browser-Test Reliability

• Add support for parallel branches in proxy lifecycle scenarios.
• Update Playwright Docker images and required CI variables.
• Improve proxy proposal caching in CI scenarios.
• Improve handling of rate-limit responses in signing flows.
• Improve wallet navigation and retry handling in browser tests.
• Increase Playwright expectation timeouts to support cold application loads.
• Remove redundant page-load waits and improve retry behavior in CI scenarios.
• Update documentation for Playwright end-to-end tests and CI configuration.

Sign-off Transaction Inspector and Builder Tools

• Add a transaction inspector for examining pending and on-chain transaction data.
• Add a transaction-builder palette for constructing and inspecting transaction outputs.
• Add touched-state tracking for transaction output fields.
• Add validation and tests for transaction-builder field interactions.

Sign-off Token-Flow Visualization

• Add token-flow visualization for pending and on-chain transactions.
• Add explorer-style visualization with separate address instances.
• Add per-input UTxO edges to improve transaction-flow accuracy.
• Add protocol-level edge handling.
• Add block-height information to transaction visualizations.
• Add a token-flow timeline for wallet transactions.
• Add comprehensive tests for token-flow utilities.

Notification Reliability Improvements

• Improve signature-recipient resolution.
• Respect signer notification-delivery preferences.
• Add tests for notification recipient and delivery behavior.
• Add a scheduled workflow to drain and process the notification outbox.
• Add notification-router test coverage.