feat: add duplicate functionality for SWOT items, enhance ActionPanel layout, and update SwotCard with duplicate action

src/components/swot/SwotCard.tsx

@@ -2,7 +2,7 @@
 
 import { forwardRef, useState, useTransition } from 'react';
 import type { SwotItem, SwotCategory } from '@prisma/client';
-import { updateSwotItem, deleteSwotItem } from '@/actions/swot';
+import { updateSwotItem, deleteSwotItem, duplicateSwotItem } from '@/actions/swot';
 
 interface SwotCardProps {
   item: SwotItem;
@@ -58,6 +58,12 @@ export const SwotCard = forwardRef<HTMLDivElement, SwotCardProps>(
       });
     }
 
+    async function handleDuplicate() {
+      startTransition(async () => {
+        await duplicateSwotItem(item.id, sessionId);
+      });
+    }
+
     function handleKeyDown(e: React.KeyboardEvent) {
       if (e.key === 'Enter' && !e.shiftKey) {
         e.preventDefault();
@@ -105,7 +111,7 @@ export const SwotCard = forwardRef<HTMLDivElement, SwotCardProps>(
 
             {/* Actions (visible on hover) */}
             {!linkMode && (
-              <div className="absolute right-1 top-1 flex gap-1 opacity-0 transition-opacity group-hover:opacity-100">
+              <div className="absolute right-1 top-1 flex gap-0.5 opacity-0 transition-opacity group-hover:opacity-100">
                 <button
                   onClick={(e) => {
                     e.stopPropagation();
@@ -123,6 +129,23 @@ export const SwotCard = forwardRef<HTMLDivElement, SwotCardProps>(
                     />
                   </svg>
                 </button>
+                <button
+                  onClick={(e) => {
+                    e.stopPropagation();
+                    handleDuplicate();
+                  }}
+                  className="rounded p-1 text-muted hover:bg-primary/10 hover:text-primary"
+                  aria-label="Dupliquer"
+                >
+                  <svg className="h-3.5 w-3.5" fill="none" viewBox="0 0 24 24" stroke="currentColor">
+                    <path
+                      strokeLinecap="round"
+                      strokeLinejoin="round"
+                      strokeWidth={2}
+                      d="M8 16H6a2 2 0 01-2-2V6a2 2 0 012-2h8a2 2 0 012 2v2m-6 12h8a2 2 0 002-2v-8a2 2 0 00-2-2h-8a2 2 0 00-2 2v8a2 2 0 002 2z"
+                    />
+                  </svg>
+                </button>
                 <button
                   onClick={(e) => {
                     e.stopPropagation();