fix: add missing UI components and utilities

- Add tabs.tsx component
- Add select.tsx component
- Add formatCurrency utility function
- Export new components from index

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/web/components/ui/select.tsx

@@ -0,0 +1,99 @@
+'use client';
+
+import * as React from 'react';
+import { cn } from '@/lib/utils';
+import { ChevronDown } from 'lucide-react';
+
+interface SelectContextValue {
+  value: string;
+  onValueChange: (value: string) => void;
+  open: boolean;
+  setOpen: (open: boolean) => void;
+}
+
+const SelectContext = React.createContext<SelectContextValue | undefined>(undefined);
+
+interface SelectProps {
+  value?: string;
+  defaultValue?: string;
+  onValueChange?: (value: string) => void;
+  children: React.ReactNode;
+}
+
+export function Select({ value, defaultValue = '', onValueChange, children }: SelectProps) {
+  const [internalValue, setInternalValue] = React.useState(defaultValue);
+  const [open, setOpen] = React.useState(false);
+  const currentValue = value ?? internalValue;
+
+  const handleValueChange = React.useCallback((newValue: string) => {
+    setInternalValue(newValue);
+    onValueChange?.(newValue);
+    setOpen(false);
+  }, [onValueChange]);
+
+  return (
+    <SelectContext.Provider value={{ value: currentValue, onValueChange: handleValueChange, open, setOpen }}>
+      <div className="relative">{children}</div>
+    </SelectContext.Provider>
+  );
+}
+
+export function SelectTrigger({ children, className }: { children: React.ReactNode; className?: string }) {
+  const context = React.useContext(SelectContext);
+  if (!context) throw new Error('SelectTrigger must be used within Select');
+
+  return (
+    <button
+      type="button"
+      onClick={() => context.setOpen(!context.open)}
+      className={cn(
+        'flex h-10 w-full items-center justify-between rounded-md border border-input bg-background px-3 py-2 text-sm ring-offset-background placeholder:text-muted-foreground focus:outline-none focus:ring-2 focus:ring-ring focus:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50',
+        className
+      )}
+    >
+      {children}
+      <ChevronDown className="h-4 w-4 opacity-50" />
+    </button>
+  );
+}
+
+export function SelectValue({ placeholder }: { placeholder?: string }) {
+  const context = React.useContext(SelectContext);
+  if (!context) throw new Error('SelectValue must be used within Select');
+
+  return <span>{context.value || placeholder}</span>;
+}
+
+export function SelectContent({ children, className }: { children: React.ReactNode; className?: string }) {
+  const context = React.useContext(SelectContext);
+  if (!context) throw new Error('SelectContent must be used within Select');
+
+  if (!context.open) return null;
+
+  return (
+    <div className={cn(
+      'absolute z-50 mt-1 max-h-60 w-full overflow-auto rounded-md border bg-popover p-1 text-popover-foreground shadow-md',
+      className
+    )}>
+      {children}
+    </div>
+  );
+}
+
+export function SelectItem({ value, children, className }: { value: string; children: React.ReactNode; className?: string }) {
+  const context = React.useContext(SelectContext);
+  if (!context) throw new Error('SelectItem must be used within Select');
+
+  return (
+    <div
+      onClick={() => context.onValueChange(value)}
+      className={cn(
+        'relative flex w-full cursor-pointer select-none items-center rounded-sm py-1.5 px-2 text-sm outline-none hover:bg-accent hover:text-accent-foreground',
+        context.value === value && 'bg-accent text-accent-foreground',
+        className
+      )}
+    >
+      {children}
+    </div>
+  );
+}