feat: Erinnerungs-Checkboxen, Anbieterlogos via Logo.dev, Kontakte in Einstellungen

lib/logo.ts

@@ -0,0 +1,56 @@
+export type LogoCandidate = { name: string; domain: string; logoUrl: string | null };
+
+const DOMAIN_RE = /^[a-z0-9.-]+\.[a-z]{2,}$/i;
+
+export function normalizeDomain(domain: string | null | undefined): string | null {
+  if (!domain) return null;
+  const d = domain.trim().toLowerCase();
+  if (!DOMAIN_RE.test(d)) return null;
+  return d;
+}
+
+/** Baut die öffentliche Logo-URL für eine gespeicherte Domain. Key bleibt serverseitig. */
+export function logoImageUrl(domain: string | null | undefined): string | null {
+  const d = normalizeDomain(domain);
+  const token = process.env.LOGO_DEV_PUBLISHABLE_KEY;
+  if (!d || !token) return null;
+  return `https://img.logo.dev/${d}?token=${token}&size=128&format=png`;
+}
+
+/** Kürzel aus dem Anbieternamen als Fallback, z. B. "Therme Erding" → "TE". */
+export function monogram(name: string): string {
+  const parts = name.trim().split(/\s+/).filter(Boolean);
+  if (parts.length === 0) return "?";
+  if (parts.length === 1) return parts[0].slice(0, 2).toUpperCase();
+  return (parts[0][0] + parts[1][0]).toUpperCase();
+}
+
+/** Reichert ein Voucher-Objekt um die öffentliche logoUrl an (serverseitig). */
+export function withLogoUrl<T extends { providerDomain: string | null }>(v: T): T & { logoUrl: string | null } {
+  return { ...v, logoUrl: logoImageUrl(v.providerDomain) };
+}
+
+/** Sucht Anbieter über Logo.dev (serverseitig, Secret-Key). Gibt max. 8 Treffer zurück. */
+export async function searchLogos(query: string): Promise<LogoCandidate[]> {
+  const key = process.env.LOGO_DEV_SECRET_KEY;
+  if (!key) throw new Error("LOGO_DEV_SECRET_KEY fehlt");
+  const q = query.trim();
+  if (!q) return [];
+  const res = await fetch(`https://api.logo.dev/search?q=${encodeURIComponent(q)}`, {
+    headers: { Authorization: `Bearer ${key}` },
+  });
+  if (!res.ok) throw new Error(`Logosuche ${res.status}`);
+  const data: unknown = await res.json();
+  if (!Array.isArray(data)) return [];
+  const out: LogoCandidate[] = [];
+  for (const item of data) {
+    if (typeof item !== "object" || item === null) continue;
+    const rec = item as Record<string, unknown>;
+    const domain = normalizeDomain(typeof rec.domain === "string" ? rec.domain : null);
+    if (!domain) continue;
+    const name = typeof rec.name === "string" && rec.name.trim() ? rec.name.trim() : domain;
+    out.push({ name, domain, logoUrl: logoImageUrl(domain) });
+    if (out.length >= 8) break;
+  }
+  return out;
+}