Return key label is contextually appropriate

The generic return key on a password field gives no signal that pressing it will submit the form — users tap the submit button anyway, making the return key dead weight. On a search field, the wrong label leaves users guessing whether return submits or inserts a newline. Contextual return keys (done, go, search, send) are a zero-cost signal that matches the platform convention and reduces form completion time.

Set returnKeyType per field and wire onSubmitEditing so pressing the key actually advances or submits. Use refs to chain focus between fields in multi-input forms:

<TextInput placeholder="First" returnKeyType="next" onSubmitEditing={() => lastRef.current?.focus()} />
<TextInput ref={lastRef} placeholder="Last" returnKeyType="done" onSubmitEditing={submit} />
<TextInput placeholder="Search" returnKeyType="search" onSubmitEditing={search} />