v1.7.0: fix offer created_at override, invoice PDF translations, remove has_order filter

- Add created_at to offer create/update schemas so user-selected date is stored instead of always defaulting to now()
- Translate payment method in invoice PDF based on language (Příkazem → Bank transfer, etc.)
- Add order_date and cnb_rate translation keys, replace hardcoded inline strings
- Remove duplicate has_order filter from offers backend route

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/routes/admin/invoices-pdf.ts

@@ -168,6 +168,24 @@ function buildAddressLines(
 
 /* ── Translations ────────────────────────────────────────────────── */
 
+const paymentMethodMap: Record<string, Record<string, string>> = {
+  cs: {
+    "Bank transfer": "Příkazem",
+    Cash: "Hotově",
+    "Cash on delivery": "Dobírka",
+  },
+  en: {
+    Příkazem: "Bank transfer",
+    Hotově: "Cash",
+    Dobírka: "Cash on delivery",
+  },
+};
+
+function translatePaymentMethod(value: string | null, lang: string): string {
+  if (!value) return "";
+  return paymentMethodMap[lang]?.[value] || value;
+}
+
 const translations: Record<string, Record<string, string>> = {
   cs: {
     title: "Faktura",
@@ -181,6 +199,7 @@ const translations: Record<string, Record<string, string>> = {
     var_symbol: "Variabilní s.:",
     const_symbol: "Konstantní s.:",
     order_no: "Objednávka č.:",
+    order_date: "Objednávka ze dne:",
     issue_date: "Datum vystavení:",
     due_date: "Datum splatnosti:",
     tax_date: "Datum uskutečnění plnění:",
@@ -213,6 +232,7 @@ const translations: Record<string, Record<string, string>> = {
     stamp: "Razítko:",
     ico: "IČ: ",
     dic: "DIČ: ",
+    cnb_rate: "Přepočet kurzem ČNB ke dni",
   },
   en: {
     title: "Invoice",
@@ -226,6 +246,7 @@ const translations: Record<string, Record<string, string>> = {
     var_symbol: "Variable symbol:",
     const_symbol: "Constant symbol:",
     order_no: "Order No.:",
+    order_date: "Order date:",
     issue_date: "Issue date:",
     due_date: "Due date:",
     tax_date: "Tax point date:",
@@ -257,6 +278,7 @@ const translations: Record<string, Record<string, string>> = {
     stamp: "Stamp:",
     ico: "Reg. No.: ",
     dic: "Tax ID: ",
+    cnb_rate: "CNB exchange rate as of",
   },
 };
 
@@ -923,9 +945,9 @@ ${indentCSS}
         <div class="info-row"><span class="lbl">${escapeHtml(t.issue_date)}</span> <span class="val">${escapeHtml(formatDate(invoice.issue_date))}</span></div>
         <div class="info-row"><span class="lbl">${escapeHtml(t.due_date)}</span> <span class="val">${escapeHtml(formatDate(invoice.due_date))}</span></div>
         <div class="info-row"><span class="lbl">${escapeHtml(t.tax_date)}</span> <span class="val">${escapeHtml(formatDate(invoice.tax_date))}</span></div>
-        <div class="info-row"><span class="lbl">${escapeHtml(t.payment_method)}</span> <span class="val">${escapeHtml(invoice.payment_method)}</span></div>
-        ${orderNumber ? `<div class="info-row"><span class="lbl">${lang === "cs" ? "Objednávka č.:" : "Order no.:"}</span> <span class="val">${orderNumber}</span></div>` : ""}
-        ${orderDate ? `<div class="info-row"><span class="lbl">${lang === "cs" ? "Objednávka ze dne:" : "Order date:"}</span> <span class="val">${escapeHtml(orderDate)}</span></div>` : ""}
+        <div class="info-row"><span class="lbl">${escapeHtml(t.payment_method)}</span> <span class="val">${escapeHtml(translatePaymentMethod(invoice.payment_method, lang))}</span></div>
+        ${orderNumber ? `<div class="info-row"><span class="lbl">${escapeHtml(t.order_no)}</span> <span class="val">${orderNumber}</span></div>` : ""}
+        ${orderDate ? `<div class="info-row"><span class="lbl">${escapeHtml(t.order_date)}</span> <span class="val">${escapeHtml(orderDate)}</span></div>` : ""}
       </td>
     </tr>
   </table>
@@ -1008,7 +1030,7 @@ ${indentCSS}
           ? `<tfoot>
         <tr>
           <td colspan="4" style="font-size:0.7em; color:#666; padding-top:6px; text-align:left;">
-            Přepočet kurzem ČNB ke dni ${formatDate(invoice.issue_date)}: 1 ${escapeHtml(currency)} = ${cnbRate.toFixed(3).replace(".", ",")} CZK
+            ${escapeHtml(t.cnb_rate)} ${formatDate(invoice.issue_date)}: 1 ${escapeHtml(currency)} = ${cnbRate.toFixed(3).replace(".", ",")} CZK
           </td>
         </tr>
       </tfoot>`