feat: add Settings component

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01V57jSQPqwkGG8BuAXg59X5

web/src/components/Settings.tsx

@@ -0,0 +1,96 @@
+// web/src/components/Settings.tsx
+import { useEffect, useState } from "react";
+import { apiFetch } from "../api";
+
+type SettingsData = { assistant_name: string; company_name: string; contact_email: string };
+
+export default function Settings() {
+  const [settings, setSettings] = useState<SettingsData | null>(null);
+  const [error, setError] = useState<string | null>(null);
+  const [saving, setSaving] = useState(false);
+  const [saved, setSaved] = useState(false);
+
+  useEffect(() => {
+    async function load() {
+      try {
+        const response = await apiFetch("/api/v1/settings");
+        if (!response.ok) {
+          setError("Einstellungen nicht verfuegbar");
+          return;
+        }
+        setSettings(await response.json());
+      } catch {
+        setError("Einstellungen nicht verfuegbar");
+      }
+    }
+    load();
+  }, []);
+
+  function updateField(field: keyof SettingsData, value: string) {
+    setSettings((prev) => (prev ? { ...prev, [field]: value } : prev));
+    setSaved(false);
+  }
+
+  async function save() {
+    if (!settings) return;
+    setSaving(true);
+    setError(null);
+    try {
+      const response = await apiFetch("/api/v1/settings", {
+        method: "PUT",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify(settings),
+      });
+      if (!response.ok) {
+        setError("Speichern fehlgeschlagen");
+        return;
+      }
+      setSettings(await response.json());
+      setSaved(true);
+    } catch {
+      setError("Speichern fehlgeschlagen");
+    } finally {
+      setSaving(false);
+    }
+  }
+
+  if (!settings) {
+    return (
+      <div className="settings">
+        {error ? <p className="error">{error}</p> : <p>Lade Einstellungen...</p>}
+      </div>
+    );
+  }
+
+  return (
+    <div className="settings">
+      <h2>Einstellungen</h2>
+      {error && <p className="error">{error}</p>}
+      <label>
+        Name des Assistenten
+        <input
+          value={settings.assistant_name}
+          onChange={(e) => updateField("assistant_name", e.target.value)}
+        />
+      </label>
+      <label>
+        Firmenname
+        <input
+          value={settings.company_name}
+          onChange={(e) => updateField("company_name", e.target.value)}
+        />
+      </label>
+      <label>
+        Kontakt-E-Mail
+        <input
+          value={settings.contact_email}
+          onChange={(e) => updateField("contact_email", e.target.value)}
+        />
+      </label>
+      <button onClick={save} disabled={saving}>
+        {saving ? "Speichert..." : "Speichern"}
+      </button>
+      {saved && <p>Gespeichert.</p>}
+    </div>
+  );
+}