feat(ui): add company-picker autocomplete component

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/components/companies/company-picker.tsx

@@ -0,0 +1,103 @@
+'use client';
+
+import { useState } from 'react';
+import { Check, ChevronsUpDown } from 'lucide-react';
+import { useQuery } from '@tanstack/react-query';
+
+import { Button } from '@/components/ui/button';
+import {
+  Command,
+  CommandEmpty,
+  CommandGroup,
+  CommandInput,
+  CommandItem,
+  CommandList,
+} from '@/components/ui/command';
+import { Popover, PopoverContent, PopoverTrigger } from '@/components/ui/popover';
+import { useDebounce } from '@/hooks/use-debounce';
+import { apiFetch } from '@/lib/api/client';
+import { cn } from '@/lib/utils';
+
+interface CompanyOption {
+  id: string;
+  name: string;
+  legalName?: string | null;
+}
+
+interface CompanyPickerProps {
+  value: string | null;
+  onChange: (companyId: string | null) => void;
+  placeholder?: string;
+  disabled?: boolean;
+}
+
+export function CompanyPicker({
+  value,
+  onChange,
+  placeholder = 'Select company...',
+  disabled,
+}: CompanyPickerProps) {
+  const [open, setOpen] = useState(false);
+  const [search, setSearch] = useState('');
+  const debounced = useDebounce(search, 300);
+
+  const { data } = useQuery<{ data: CompanyOption[] }>({
+    queryKey: ['company-picker', debounced],
+    queryFn: () => apiFetch(`/api/v1/companies/autocomplete?q=${encodeURIComponent(debounced)}`),
+    enabled: open,
+  });
+
+  const options = data?.data ?? [];
+
+  const selectedLabel = (() => {
+    if (!value) return placeholder;
+    const match = options.find((o) => o.id === value);
+    return match?.name ?? `Company ${value.slice(0, 8)}`;
+  })();
+
+  return (
+    <Popover open={open} onOpenChange={setOpen}>
+      <PopoverTrigger asChild>
+        <Button
+          variant="outline"
+          role="combobox"
+          disabled={disabled}
+          className={cn('w-full justify-between', !value && 'text-muted-foreground')}
+        >
+          <span className="truncate">{selectedLabel}</span>
+          <ChevronsUpDown className="ml-2 h-4 w-4 shrink-0 opacity-50" />
+        </Button>
+      </PopoverTrigger>
+      <PopoverContent className="w-[320px] p-0" align="start">
+        <Command shouldFilter={false}>
+          <CommandInput placeholder="Search companies…" value={search} onValueChange={setSearch} />
+          <CommandList>
+            <CommandEmpty>No companies found.</CommandEmpty>
+            <CommandGroup>
+              {options.map((c) => (
+                <CommandItem
+                  key={c.id}
+                  value={c.id}
+                  onSelect={() => {
+                    onChange(c.id);
+                    setOpen(false);
+                  }}
+                >
+                  <Check
+                    className={cn('mr-2 h-4 w-4', value === c.id ? 'opacity-100' : 'opacity-0')}
+                  />
+                  <span>
+                    {c.name}
+                    {c.legalName ? (
+                      <span className="ml-2 text-xs opacity-60">{c.legalName}</span>
+                    ) : null}
+                  </span>
+                </CommandItem>
+              ))}
+            </CommandGroup>
+          </CommandList>
+        </Command>
+      </PopoverContent>
+    </Popover>
+  );
+}