Don't use user-facing text to identify user elements

https://github.com/diffplug/gitcasso/blob/63442ea81aa8c479fd2bc401dcf1c198b427d72c/browser-extension/src/lib/enhancers/modifyDOM.ts#L33-L34

- Finding classes or IDs to identify these will be fragile to engineering changes, but resilient to locale
- The approach we are using now only works for english users

Start at browser-extension/src/lib/enhancers/modifyDOM.ts lines 33-34 and trace how user elements are identified. Replace the reliance on user-facing text with identifiers that remain usable across locales, then verify the enhancer still finds the intended elements after engineering changes.

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