P1 of modal refactor — visual fidelity baseline against the Claude
Design reference and refactoring-ui rules.
Drop required: true on name + target_amount (suppresses both the red `*`
indicator and the browser-default HTML5 validation tooltip). Client-side
validation moves into the Stimulus stepper in a follow-up commit.
Pass hide_currency: true on the money_field so single-currency families
don't see a redundant inline currency dropdown.
Wrap the Notes textarea in a <details> disclosure ("Add notes (optional)"
summary) so step 1 isn't padded with rarely-used fields.
Drop the footer top border-subdued divider so the action row floats
against the dialog's existing padding boundary.
Drop the view-layer SavingsGoal::COLORS.sample fallback on hidden color
field — the controller already seeds @savings_goal.color.
c04b306bfd