fix: use HM Label instead of bare <label> for switch fields

ai-generation-guard.mjs flagged REUSE-004 on 5 native <label>
wrappers around Switch controls in Toolbar/OptionsPanel; swapped to
@hm-design/ui's Label per AGENTS.md field-label rule. Remaining guard
findings (hidden file input, dynamic panel geometry, per-entity CAD
layer color) are documented exceptions with no matching HM component.

Refs #1

src/components/OptionsPanel.tsx

@@ -107,13 +107,13 @@ export function OptionsPanel({
       <div className="space-y-5">
         <section className="space-y-3">
           <h4 className="text-xs font-semibold uppercase tracking-wide text-muted-foreground">선가중치</h4>
-          <label className="flex items-center justify-between text-sm">
+          <Label className="w-full justify-between text-sm">
             표시 사용
             <Switch
               checked={options.lineweightOn ?? false}
               onCheckedChange={(on) => onSetLineweightOn(on)}
             />
-          </label>
+          </Label>
           <SliderNumberRow
             label="표시 배율 (px/mm)"
             value={lwScale}
@@ -128,10 +128,10 @@ export function OptionsPanel({
 
         <section className="space-y-3 border-t pt-4">
           <h4 className="text-xs font-semibold uppercase tracking-wide text-muted-foreground">표시</h4>
-          <label className="flex items-center justify-between text-sm">
+          <Label className="w-full justify-between text-sm">
             그리드
             <Switch checked={options.grid} onCheckedChange={onSetGrid} />
-          </label>
+          </Label>
           <SliderNumberRow
             label="줌 속도"
             value={options.zoomSpeed}
@@ -144,10 +144,10 @@ export function OptionsPanel({
 
         <section className="space-y-3 border-t pt-4">
           <h4 className="text-xs font-semibold uppercase tracking-wide text-muted-foreground">2.5D</h4>
-          <label className="flex items-center justify-between text-sm">
+          <Label className="w-full justify-between text-sm">
             2.5D 보기
             <Switch checked={is25D} onCheckedChange={onSet25D} />
-          </label>
+          </Label>
           <div className={is25D ? '' : 'pointer-events-none opacity-50'}>
             <SliderNumberRow
               label="Z 높이 배율"