refactor(ui): single shared documentStatus map across offers/invoices/orders (fix issued color drift, add offers status chip)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/admin/pages/OfferDetail.tsx

@@ -76,6 +76,7 @@ import {
   PageEnter,
   headerActionsSx,
 } from "../ui";
+import { OFFER_STATUS, statusLabel, statusColor } from "../lib/documentStatus";
 
 const API_BASE = "/api/admin";
 const DRAFT_KEY = "boha_offer_draft";
@@ -1124,10 +1125,17 @@ export default function OfferDetail() {
               <Typography variant="h4">
                 {isEdit ? `Nabídka ${form.quotation_number}` : "Nová nabídka"}
               </Typography>
-              {isInvalidated && (
-                <StatusChip label="Zneplatněna" color="error" />
-              )}
-              {isCompleted && <StatusChip label="Dokončeno" color="success" />}
+              {isEdit &&
+                (isCompleted ? (
+                  // Completed is derived from the linked order, not the offer's
+                  // own status — surface it (success) over the base chip.
+                  <StatusChip label="Dokončená" color="success" />
+                ) : (
+                  <StatusChip
+                    label={statusLabel(OFFER_STATUS, offerStatus)}
+                    color={statusColor(OFFER_STATUS, offerStatus)}
+                  />
+                ))}
             </Box>
           </Box>
           <Box sx={headerActionsSx}>