Fix data-testid

[arhtudormorar]

PR Title

Normalize data-testid usage across UI components

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Summary

This PR standardizes how test IDs are defined and propagated so that:

• DOM always uses data-testid={...}.
• Stencil class components expose a dataTestId?: string prop mapped to the data-testid attribute.
• Common TSX helpers accept 'data-testid' in their props and internally alias to dataTestId.

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Key Changes

• Common TSX components

  • Button, FormatAmount, ValidFormatAmount, InvalidFormatAmount, Trim, ExplorerLink, UnlockButton:
    • Props now use 'data-testid'?: string.
    • Destructure with an internal alias, e.g. {'data-testid': dataTestId}.
    • Render data-testid={dataTestId} on DOM elements.

• Stencil class components

  • mvx-button, mvx-trim, mvx-explorer-link, mvx-format-amount, mvx-data-with-explorer-link, TransactionAccount, TransactionAccountName, TransactionShards, etc.:
    • Declare @Prop({ attribute: 'data-testid' }) dataTestId?: string where a test id is part of the public API.
    • Forward to children via data-testid={this.dataTestId} (or equivalent).
  • Wrapper/controlled components (UnlockProviderButton, TransactionValue, TransactionHash, TransactionsTable, etc.) now pass data-testid instead of dataTestId to underlying components.

• Stories & tests

  • Storybook stories:
    • argTypes updated to use 'data-testid' where the prop is configurable (e.g. Trim, DataWithExplorerLink).
    • Example usages updated to pass data-testid="...".
  • Specs:
    • data-with-explorer-link.spec.ts, transaction-account.spec.tsx, transaction-account-name.spec.tsx, transaction-shards.spec.tsx updated to:
      • Use data-testid attributes in HTML/JSX.
      • Assert with [data-testid="..."].
      • Read Stencil class props via component.dataTestId when needed.

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Rationale

• Removes the previous inconsistency between dataTestId and data-testid.
• Aligns public HTML API with common testing conventions (data-testid).
• Keeps TypeScript ergonomics on Stencil classes (dataTestId property) while ensuring the HTML attribute is always data-testid.

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Testing

• Build

  • pnpm run build

• Tests

  • pnpm test
    • Updated specs for:
      • DataWithExplorerLink
      • TransactionAccount
      • TransactionAccountName
      • TransactionShards
    • now pass against the new data-testid behavior. (In sandboxed CI-like environments, EPERM on node_modules can still cause infrastructure-level failures unrelated to these changes.)