chore: auto-commit (23 archivos)

- app.md
- backend/auth.go
- backend/db.go
- backend/dist/assets/index-CPqSy0gZ.js
- backend/dist/index.html
- backend/handlers.go
- backend/main.go
- frontend/src/App.tsx
- frontend/src/api.ts
- frontend/src/components/KanbanCard.tsx
- ...

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

frontend/src/components/KanbanCard.tsx

@@ -18,6 +18,7 @@ import {
   IconCalendarDue,
   IconCheck,
   IconClock,
+  IconCopy,
   IconDotsVertical,
   IconEdit,
   IconGripVertical,
@@ -42,6 +43,7 @@ interface Props {
   now: number;
   onDelete: (id: string) => void;
   onEdit: (card: Card) => void;
+  onDuplicate?: (id: string) => void;
   onChangeColor: (id: string, color: CardColor) => void;
   onShowHistory: (card: Card) => void;
   onToggleLock: (id: string, locked: boolean) => void;
@@ -67,6 +69,7 @@ function KanbanCardImpl({
   now,
   onDelete,
   onEdit,
+  onDuplicate,
   onChangeColor,
   onShowHistory,
   onToggleLock,
@@ -206,6 +209,17 @@ function KanbanCardImpl({
       >
         Editar
       </Menu.Item>
+      {onDuplicate && (
+        <Menu.Item
+          leftSection={<IconCopy size={14} />}
+          onClick={() => {
+            setMenuOpen(false);
+            onDuplicate(card.id);
+          }}
+        >
+          Duplicar
+        </Menu.Item>
+      )}
       <Popover
         opened={colorPopOpen}
         onChange={setColorPopOpen}