feat(ui): unify VAT rate+toggle layout (offers/invoices/orders); move offers secondary row actions into an overflow menu

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

src/admin/pages/InvoiceDetail.tsx

@@ -1889,7 +1889,7 @@ export default function InvoiceDetail() {
           <Box
             sx={{
               display: "grid",
-              gridTemplateColumns: { xs: "1fr", md: "1fr 1fr 1fr 1fr" },
+              gridTemplateColumns: { xs: "1fr", md: "repeat(5, 1fr)" },
               gap: 2,
             }}
           >
@@ -1934,6 +1934,23 @@ export default function InvoiceDetail() {
                 ]}
               />
             </Field>
+            {/* Document-default VAT rate. Presentational only — it writes the
+                already-existing `form.vat_rate` (used to seed new line rows /
+                as the per-line fallback). Totals are computed per-line from
+                `item.vat_rate`, so changing this does NOT alter computed VAT. */}
+            <Field label="Sazba DPH">
+              <Select
+                value={String(form.vat_rate)}
+                disabled={!form.apply_vat}
+                onChange={(val) =>
+                  setForm((prev) => ({ ...prev, vat_rate: Number(val) }))
+                }
+                options={vatOptions.map((o) => ({
+                  value: String(o.value),
+                  label: o.label,
+                }))}
+              />
+            </Field>
             <Field label="DPH">
               <Box sx={{ display: "flex", alignItems: "center", height: 40 }}>
                 <CheckboxField

src/admin/pages/IssuedOrderDetail.tsx

@@ -1022,7 +1022,7 @@ export default function IssuedOrderDetail() {
                 ]}
               />
             </Field>
-            <Field label="Výchozí DPH">
+            <Field label="Sazba DPH">
               <Select
                 value={String(form.vat_rate)}
                 disabled={!editable || !form.apply_vat}

src/admin/pages/OfferDetail.tsx

@@ -1363,7 +1363,7 @@ export default function OfferDetail() {
             gap: 2,
           }}
         >
-          <Field label="Sazba DPH (%)">
+          <Field label="Sazba DPH">
             <Box sx={{ display: "flex", gap: 1, alignItems: "center" }}>
               <Select
                 value={String(form.vat_rate)}
@@ -1388,7 +1388,7 @@ export default function OfferDetail() {
                   onChange={(e) => updateForm("apply_vat", e.target.checked)}
                   disabled={readOnly}
                 />
-                <Box component="span">Účtovat DPH</Box>
+                <Box component="span">Uplatnit DPH</Box>
               </Box>
             </Box>
           </Field>

src/admin/pages/Offers.tsx

@@ -4,6 +4,10 @@ import Box from "@mui/material/Box";
 import Typography from "@mui/material/Typography";
 import IconButton from "@mui/material/IconButton";
 import CircularProgress from "@mui/material/CircularProgress";
+import Menu from "@mui/material/Menu";
+import MenuItem from "@mui/material/MenuItem";
+import ListItemIcon from "@mui/material/ListItemIcon";
+import ListItemText from "@mui/material/ListItemText";
 import { useAlert } from "../context/AlertContext";
 import { useAuth } from "../context/AuthContext";
 import Forbidden from "../components/Forbidden";
@@ -228,6 +232,92 @@ const DeleteIcon = (
     <path d="M19 6v14a2 2 0 0 1-2 2H7a2 2 0 0 1-2-2V6m3 0V4a2 2 0 0 1 2-2h4a2 2 0 0 1 2 2v2" />
   </svg>
 );
+const MoreIcon = (
+  <svg
+    width="18"
+    height="18"
+    viewBox="0 0 24 24"
+    fill="currentColor"
+    stroke="none"
+  >
+    <circle cx="12" cy="5" r="1.6" />
+    <circle cx="12" cy="12" r="1.6" />
+    <circle cx="12" cy="19" r="1.6" />
+  </svg>
+);
+
+/**
+ * Per-row overflow menu for the secondary offer actions (Duplicate +
+ * Zneplatnit). Hook state (anchorEl) lives HERE, in a child component — never
+ * in the page-level `.map`/render callback — so each row owns its own menu
+ * (no shared-open bug) and Rules of Hooks stay satisfied. The page passes in
+ * the same handlers + permission/disabled flags the inline icons used, so
+ * behavior/permissions/confirms are preserved verbatim; the items are merely
+ * relocated. The menu renders nothing (returns null) when no secondary action
+ * is available for the row.
+ */
+function RowActionsMenu({
+  canDuplicate,
+  duplicating,
+  onDuplicate,
+  canInvalidate,
+  onInvalidate,
+}: {
+  canDuplicate: boolean;
+  duplicating: boolean;
+  onDuplicate: () => void;
+  canInvalidate: boolean;
+  onInvalidate: () => void;
+}) {
+  const [anchorEl, setAnchorEl] = useState<HTMLElement | null>(null);
+  if (!canDuplicate && !canInvalidate) return null;
+  const close = () => setAnchorEl(null);
+  return (
+    <>
+      <IconButton
+        size="small"
+        onClick={(e) => setAnchorEl(e.currentTarget)}
+        aria-label="Další akce"
+        title="Další akce"
+      >
+        {MoreIcon}
+      </IconButton>
+      <Menu
+        anchorEl={anchorEl}
+        open={Boolean(anchorEl)}
+        onClose={close}
+        anchorOrigin={{ vertical: "bottom", horizontal: "right" }}
+        transformOrigin={{ vertical: "top", horizontal: "right" }}
+      >
+        {canDuplicate && (
+          <MenuItem
+            disabled={duplicating}
+            onClick={() => {
+              close();
+              onDuplicate();
+            }}
+          >
+            <ListItemIcon>
+              {duplicating ? <CircularProgress size={16} /> : DuplicateIcon}
+            </ListItemIcon>
+            <ListItemText>Duplikovat</ListItemText>
+          </MenuItem>
+        )}
+        {canInvalidate && (
+          <MenuItem
+            onClick={() => {
+              close();
+              onInvalidate();
+            }}
+          >
+            <ListItemIcon>{InvalidateIcon}</ListItemIcon>
+            <ListItemText>Zneplatnit</ListItemText>
+          </MenuItem>
+        )}
+      </Menu>
+    </>
+  );
+}
 
 export default function Offers() {
   const alert = useAlert();
@@ -580,6 +670,16 @@ export default function Offers() {
         const isInvalidated = q.status === "invalidated";
         const isCompleted = !isInvalidated && q.order_status === "dokoncena";
         const readOnly = isInvalidated || isCompleted;
+        // Secondary actions (relocated into the overflow menu). Same gates as
+        // before: Duplicate needs offers.create and an editable (not
+        // read-only) row; Zneplatnit needs offers.edit and a row that is not
+        // invalidated/completed/ordered.
+        const canDuplicate = !readOnly && hasPermission("offers.create");
+        const canInvalidate =
+          !isInvalidated &&
+          !isCompleted &&
+          !q.order_id &&
+          hasPermission("offers.edit");
         return (
           <Box sx={{ display: "flex", gap: 0.5, justifyContent: "flex-end" }}>
             <IconButton
@@ -590,21 +690,6 @@ export default function Offers() {
             >
               {readOnly ? ViewIcon : EditIcon}
             </IconButton>
-            {!readOnly && hasPermission("offers.create") && (
-              <IconButton
-                size="small"
-                onClick={() => handleDuplicate(q)}
-                aria-label="Duplikovat"
-                title="Duplikovat"
-                disabled={duplicating === q.id}
-              >
-                {duplicating === q.id ? (
-                  <CircularProgress size={16} />
-                ) : (
-                  DuplicateIcon
-                )}
-              </IconButton>
-            )}
             {!readOnly && q.order_id ? (
               <IconButton
                 size="small"
@@ -637,21 +722,6 @@ export default function Offers() {
                 </IconButton>
               )
             )}
-            {!isInvalidated &&
-              !isCompleted &&
-              !q.order_id &&
-              hasPermission("offers.edit") && (
-                <IconButton
-                  size="small"
-                  onClick={() =>
-                    setInvalidateConfirm({ show: true, quotation: q })
-                  }
-                  aria-label="Zneplatnit"
-                  title="Zneplatnit"
-                >
-                  {InvalidateIcon}
-                </IconButton>
-              )}
             {hasPermission("offers.export") && (
               <IconButton
                 size="small"
@@ -674,6 +744,15 @@ export default function Offers() {
                 {DeleteIcon}
               </IconButton>
             )}
+            <RowActionsMenu
+              canDuplicate={canDuplicate}
+              duplicating={duplicating === q.id}
+              onDuplicate={() => handleDuplicate(q)}
+              canInvalidate={canInvalidate}
+              onInvalidate={() =>
+                setInvalidateConfirm({ show: true, quotation: q })
+              }
+            />
           </Box>
         );
       },