1.5.2

- feat: order confirmation PDF generation with VAT support
- feat: order confirmation modal with custom item editing
- fix: attendance negative duration clamping and switchProject timing
- fix: Quill editor locked to Tahoma 14px, PDF heading sizes
- fix: invoice/offer PDF font consistency (Tahoma enforcement)
- fix: invoice alert cron improvements
- fix: NAS financials manager edge cases
- refactor: numbering service with unique sequence constraints

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

src/admin/pages/OfferDetail.tsx

@@ -635,14 +635,17 @@ export default function OfferDetail() {
     setSaving(true);
     try {
       const url = isEdit ? `${API_BASE}/offers/${id}` : `${API_BASE}/offers`;
+      const payload: any = {
+        ...form,
+        items: items.map((item, i) => ({ ...item, position: i })),
+        sections: sections.map((s, i) => ({ ...s, position: i })),
+      };
+      if (!isEdit) delete payload.quotation_number;
+
       const response = await apiFetch(url, {
         method: isEdit ? "PUT" : "POST",
         headers: { "Content-Type": "application/json" },
-        body: JSON.stringify({
-          ...form,
-          items: items.map((item, i) => ({ ...item, position: i })),
-          sections: sections.map((s, i) => ({ ...s, position: i })),
-        }),
+        body: JSON.stringify(payload),
       });
       const result = await response.json();
       if (result.success) {
@@ -1016,13 +1019,12 @@ export default function OfferDetail() {
               <input
                 type="text"
                 value={form.quotation_number}
-                onChange={(e) =>
-                  setForm((prev) => ({
-                    ...prev,
-                    quotation_number: e.target.value,
-                  }))
-                }
+                readOnly
                 className="admin-form-input"
+                style={{
+                  backgroundColor: "var(--bg-secondary)",
+                  cursor: "default",
+                }}
               />
             </FormField>
             <FormField label="Kód projektu">