fix(ui): stop passing a type argument to a chart helper that has none

Fixes the typecheck failure blocking #181.

What's wrong

@ts-charts/shape declares line as:

export default function createLine(x?: any, y?: any): any;

Not generic. So line<any>() in packages/ui/src/charts.ts is a type error against 0.2.x:

packages/ui/src/charts.ts(115,10): error TS2558: Expected 0 type arguments, but got 1.

The pinned 0.2.0 still had it generic, which is why this only shows up on the dependency-update branch and not on main.

Why here and not on #181's branch

Dropping the type argument rather than pinning the dependency back, because a type argument on a generic is optional — so this compiles against both the pinned version and the update. I verified both: typecheck passes with 0.2.0 installed and with 0.2.7 installed.

Landing it on main rather than pushing into Renovate's branch means #181 goes green on its next rebase, instead of the fix living in a branch Renovate owns and will rewrite.

The accessors below the call already carry the typing (.x((d: any) => d.x)), so nothing is lost by removing it.

Checked

I grepped for every other generic call site into that package — area<, stack<, scaleBand<, scaleLinear<, pie<, arc<, symbol<, radialLine< — and this is the only one. So #181 should have no second failure behind this one.

Typecheck and lint clean; full suite green on both dependency versions (4117 pass / 0 fail on the update branch, which is stale and so runs fewer tests than main).