C4: Add SettingsTaxes.tsx — CRUD UI for tax rates

frontend/src/pages/SettingsTaxes.tsx

@@ -0,0 +1,143 @@
+import React, { useState, useCallback } from 'react';
+import { useTranslation } from 'react-i18next';
+import { apiGet, apiPost, apiPatch, apiDelete } from '@/api/client';
+
+interface TaxRate {
+  id: string;
+  name: string;
+  rate: number;
+  is_default: boolean;
+  country: string | null;
+}
+
+export function SettingsTaxesPage() {
+  const { t } = useTranslation();
+  const [taxes, setTaxes] = useState<TaxRate[]>([]);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
+  const [showForm, setShowForm] = useState(false);
+  const [editing, setEditing] = useState<TaxRate | null>(null);
+  const [formData, setFormData] = useState({ name: '', rate: 0, is_default: false, country: '' });
+
+  const fetchTaxes = useCallback(async () => {
+    setLoading(true);
+    setError(null);
+    try {
+      const data = await apiGet<{ items: TaxRate[]; total: number }>('/taxes');
+      setTaxes(data.items);
+    } catch (err: any) {
+      setError(err.message || t('common.error'));
+    } finally {
+      setLoading(false);
+    }
+  }, [t]);
+
+  React.useEffect(() => { fetchTaxes(); }, [fetchTaxes]);
+
+  const handleSave = async (e: React.FormEvent) => {
+    e.preventDefault();
+    try {
+      const payload = { ...formData, country: formData.country || null };
+      if (editing) {
+        await apiPatch(`/taxes/${editing.id}`, payload);
+      } else {
+        await apiPost('/taxes', payload);
+      }
+      setShowForm(false);
+      setEditing(null);
+      setFormData({ name: '', rate: 0, is_default: false, country: '' });
+      await fetchTaxes();
+    } catch (err: any) {
+      setError(err.message || t('common.error'));
+    }
+  };
+
+  const handleDelete = async (id: string) => {
+    if (!window.confirm(t('taxes.confirmDelete'))) return;
+    try {
+      await apiDelete(`/taxes/${id}`);
+      await fetchTaxes();
+    } catch (err: any) {
+      setError(err.message || t('common.error'));
+    }
+  };
+
+  const handleEdit = (tax: TaxRate) => {
+    setEditing(tax);
+    setFormData({ name: tax.name, rate: tax.rate, is_default: tax.is_default, country: tax.country || '' });
+    setShowForm(true);
+  };
+
+  if (loading) return <div className="text-secondary-500">{t('common.loading')}</div>;
+
+  return (
+    <div className="space-y-6" data-testid="settings-taxes">
+      <div className="flex items-center justify-between">
+        <h1 className="text-2xl font-bold text-secondary-900">{t('taxes.title')}</h1>
+        <button
+          onClick={() => { setEditing(null); setFormData({ name: '', rate: 0, is_default: false, country: '' }); setShowForm(true); }}
+          className="px-4 py-2 text-sm font-medium text-white bg-primary-600 rounded-lg hover:bg-primary-700"
+        >
+          {t('taxes.add')}
+        </button>
+      </div>
+
+      {error && <div className="p-3 text-sm text-red-700 bg-red-50 rounded-lg">{error}</div>}
+
+      {showForm && (
+        <form onSubmit={handleSave} className="p-4 border border-secondary-200 rounded-lg space-y-3">
+          <div>
+            <label className="block text-sm font-medium text-secondary-700">{t('taxes.name')}</label>
+            <input type="text" value={formData.name} onChange={(e) => setFormData({ ...formData, name: e.target.value })} required className="mt-1 block w-full rounded-md border border-secondary-300 px-3 py-1.5 text-sm" />
+          </div>
+          <div className="grid grid-cols-2 gap-3">
+            <div>
+              <label className="block text-sm font-medium text-secondary-700">{t('taxes.rate')} (%)</label>
+              <input type="number" step="0.01" value={formData.rate} onChange={(e) => setFormData({ ...formData, rate: parseFloat(e.target.value) || 0 })} required className="mt-1 block w-full rounded-md border border-secondary-300 px-3 py-1.5 text-sm" />
+            </div>
+            <div>
+              <label className="block text-sm font-medium text-secondary-700">{t('taxes.country')}</label>
+              <input type="text" value={formData.country} onChange={(e) => setFormData({ ...formData, country: e.target.value })} maxLength={2} placeholder="DE" className="mt-1 block w-full rounded-md border border-secondary-300 px-3 py-1.5 text-sm" />
+            </div>
+          </div>
+          <label className="flex items-center gap-2 text-sm font-medium text-secondary-700">
+            <input type="checkbox" checked={formData.is_default} onChange={(e) => setFormData({ ...formData, is_default: e.target.checked })} />
+            {t('taxes.isDefault')}
+          </label>
+          <div className="flex justify-end gap-2">
+            <button type="button" onClick={() => { setShowForm(false); setEditing(null); }} className="px-3 py-1.5 text-sm font-medium text-secondary-700 bg-secondary-100 rounded-lg hover:bg-secondary-200">{t('common.cancel')}</button>
+            <button type="submit" className="px-3 py-1.5 text-sm font-medium text-white bg-primary-600 rounded-lg hover:bg-primary-700">{t('common.save')}</button>
+          </div>
+        </form>
+      )}
+
+      <div className="overflow-hidden border border-secondary-200 rounded-lg">
+        <table className="min-w-full divide-y divide-secondary-200">
+          <thead className="bg-secondary-50">
+            <tr>
+              <th className="px-4 py-2 text-left text-xs font-medium text-secondary-500 uppercase">{t('taxes.name')}</th>
+              <th className="px-4 py-2 text-left text-xs font-medium text-secondary-500 uppercase">{t('taxes.rate')}</th>
+              <th className="px-4 py-2 text-left text-xs font-medium text-secondary-500 uppercase">{t('taxes.isDefault')}</th>
+              <th className="px-4 py-2 text-left text-xs font-medium text-secondary-500 uppercase">{t('taxes.country')}</th>
+              <th className="px-4 py-2"></th>
+            </tr>
+          </thead>
+          <tbody className="divide-y divide-secondary-200">
+            {taxes.map((tax) => (
+              <tr key={tax.id}>
+                <td className="px-4 py-2 text-sm text-secondary-900">{tax.name}</td>
+                <td className="px-4 py-2 text-sm text-secondary-900">{tax.rate}%</td>
+                <td className="px-4 py-2 text-sm">{tax.is_default && <span className="text-primary-600">✓</span>}</td>
+                <td className="px-4 py-2 text-sm text-secondary-900">{tax.country || '—'}</td>
+                <td className="px-4 py-2 text-sm text-right">
+                  <button onClick={() => handleEdit(tax)} className="text-secondary-600 hover:underline mr-3">{t('common.edit')}</button>
+                  <button onClick={() => handleDelete(tax.id)} className="text-red-600 hover:underline">{t('common.delete')}</button>
+                </td>
+              </tr>
+            ))}
+          </tbody>
+        </table>
+      </div>
+    </div>
+  );
+}