feat(05-02): remove hardcoded rounded-* from CategorySection, ChartEmptyState, QuickAddPicker

- CategorySection: remove rounded-md from collapsible trigger button
- ChartEmptyState: remove rounded-lg from empty state border container
- QuickAddPicker: remove rounded-sm from picker item buttons
- QuickAddPicker: remove rounded-full from category dot indicator

src/components/QuickAddPicker.tsx

@@ -153,7 +153,7 @@ export default function QuickAddPicker({ budgetId }: QuickAddPickerProps) {
                     type="button"
                     role="option"
                     aria-selected={false}
-                    className="flex w-full items-center gap-2 rounded-sm px-2 py-1.5 text-sm hover:bg-accent hover:text-accent-foreground focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring"
+                    className="flex w-full items-center gap-2 px-2 py-1.5 text-sm hover:bg-accent hover:text-accent-foreground focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring"
                     onClick={() => handlePickItem(item)}
                   >
                     {item.icon && (
@@ -198,7 +198,7 @@ export default function QuickAddPicker({ budgetId }: QuickAddPickerProps) {
                       <SelectGroup key={type}>
                         <SelectLabel className="flex items-center gap-1.5">
                           <div
-                            className="size-2 rounded-full"
+                            className="size-2"
                             style={{ backgroundColor: categoryColors[type] }}
                           />
                           {t(`categories.types.${type}`)}

src/components/dashboard/CategorySection.tsx

@@ -70,7 +70,7 @@ export function CategorySection({
     <Collapsible open={open} onOpenChange={onOpenChange}>
       <CollapsibleTrigger asChild>
         <button
-          className="group flex w-full items-center gap-3 rounded-md border-l-4 bg-card px-4 py-3 text-left hover:bg-muted/40 transition-colors"
+          className="group flex w-full items-center gap-3 border-l-4 bg-card px-4 py-3 text-left hover:bg-muted/40 transition-colors"
           style={{ borderLeftColor: categoryColors[type] }}
         >
           <ChevronRight

src/components/dashboard/charts/ChartEmptyState.tsx

@@ -9,7 +9,7 @@ export function ChartEmptyState({ message, className }: ChartEmptyStateProps) {
   return (
     <div
       className={cn(
-        "flex min-h-[250px] w-full items-center justify-center rounded-lg border border-dashed border-muted-foreground/20 bg-muted/30",
+        "flex min-h-[250px] w-full items-center justify-center border border-dashed border-muted-foreground/20 bg-muted/30",
         className
       )}
     >