feat: add portfolio edit/delete UI with confirmation dialogs

Add hover-visible edit (rename) and delete buttons to portfolio cards
on the list page, with modal dialogs for name editing and delete
confirmation. Uses existing PUT/DELETE API endpoints.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/app/portfolio/page.tsx

@@ -5,9 +5,21 @@ import { useRouter } from 'next/navigation';
 import Link from 'next/link';
 import { DashboardLayout } from '@/components/layout/dashboard-layout';
 import { Button } from '@/components/ui/button';
+import { Input } from '@/components/ui/input';
+import { Label } from '@/components/ui/label';
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogFooter,
+  DialogHeader,
+  DialogTitle,
+} from '@/components/ui/dialog';
 import { PortfolioCard } from '@/components/portfolio/portfolio-card';
 import { Skeleton } from '@/components/ui/skeleton';
 import { api } from '@/lib/api';
+import { toast } from 'sonner';
+import { Pencil, Trash2 } from 'lucide-react';
 
 interface HoldingWithValue {
   ticker: string;
@@ -33,6 +45,17 @@ export default function PortfolioListPage() {
   const [portfolios, setPortfolios] = useState<Portfolio[]>([]);
   const [error, setError] = useState<string | null>(null);
 
+  // Edit modal state
+  const [editModalOpen, setEditModalOpen] = useState(false);
+  const [editTarget, setEditTarget] = useState<Portfolio | null>(null);
+  const [editName, setEditName] = useState('');
+  const [editSaving, setEditSaving] = useState(false);
+
+  // Delete modal state
+  const [deleteModalOpen, setDeleteModalOpen] = useState(false);
+  const [deleteTarget, setDeleteTarget] = useState<Portfolio | null>(null);
+  const [deleting, setDeleting] = useState(false);
+
   useEffect(() => {
     const init = async () => {
       try {
@@ -88,6 +111,53 @@ export default function PortfolioListPage() {
     return (portfolio.total_profit_loss / portfolio.total_invested) * 100;
   };
 
+  const handleOpenEdit = (e: React.MouseEvent, portfolio: Portfolio) => {
+    e.preventDefault();
+    e.stopPropagation();
+    setEditTarget(portfolio);
+    setEditName(portfolio.name);
+    setEditModalOpen(true);
+  };
+
+  const handleSaveEdit = async () => {
+    if (!editTarget || !editName.trim()) return;
+    setEditSaving(true);
+    try {
+      await api.put(`/api/portfolios/${editTarget.id}`, { name: editName.trim() });
+      toast.success('포트폴리오 이름이 변경되었습니다.');
+      setEditModalOpen(false);
+      await fetchPortfolios();
+    } catch (err) {
+      console.error('Failed to update portfolio:', err);
+      toast.error('포트폴리오 수정에 실패했습니다.');
+    } finally {
+      setEditSaving(false);
+    }
+  };
+
+  const handleOpenDelete = (e: React.MouseEvent, portfolio: Portfolio) => {
+    e.preventDefault();
+    e.stopPropagation();
+    setDeleteTarget(portfolio);
+    setDeleteModalOpen(true);
+  };
+
+  const handleConfirmDelete = async () => {
+    if (!deleteTarget) return;
+    setDeleting(true);
+    try {
+      await api.delete(`/api/portfolios/${deleteTarget.id}`);
+      toast.success('포트폴리오가 삭제되었습니다.');
+      setDeleteModalOpen(false);
+      setPortfolios((prev) => prev.filter((p) => p.id !== deleteTarget.id));
+    } catch (err) {
+      console.error('Failed to delete portfolio:', err);
+      toast.error('포트폴리오 삭제에 실패했습니다.');
+    } finally {
+      setDeleting(false);
+    }
+  };
+
   if (loading) {
     return (
       <DashboardLayout>
@@ -121,15 +191,32 @@ export default function PortfolioListPage() {
 
       <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4">
         {portfolios.map((portfolio) => (
-          <PortfolioCard
+          <div key={portfolio.id} className="relative group">
-            key={portfolio.id}
+            <PortfolioCard
-            id={portfolio.id}
+              id={portfolio.id}
-            name={portfolio.name}
+              name={portfolio.name}
-            portfolioType={portfolio.portfolio_type}
+              portfolioType={portfolio.portfolio_type}
-            totalValue={portfolio.total_value ?? null}
+              totalValue={portfolio.total_value ?? null}
-            returnPercent={calculateReturnPercent(portfolio)}
+              returnPercent={calculateReturnPercent(portfolio)}
-            holdings={portfolio.holdings ?? []}
+              holdings={portfolio.holdings ?? []}
-          />
+            />
+            <div className="absolute top-3 right-14 flex gap-1 opacity-0 group-hover:opacity-100 transition-opacity z-10">
+              <button
+                onClick={(e) => handleOpenEdit(e, portfolio)}
+                className="p-1.5 rounded-md bg-background/80 border border-border hover:bg-muted text-muted-foreground hover:text-foreground"
+                title="이름 변경"
+              >
+                <Pencil className="h-3.5 w-3.5" />
+              </button>
+              <button
+                onClick={(e) => handleOpenDelete(e, portfolio)}
+                className="p-1.5 rounded-md bg-background/80 border border-border hover:bg-destructive/10 text-muted-foreground hover:text-destructive"
+                title="삭제"
+              >
+                <Trash2 className="h-3.5 w-3.5" />
+              </button>
+            </div>
+          </div>
         ))}
       </div>
 
@@ -161,6 +248,57 @@ export default function PortfolioListPage() {
           </Button>
         </div>
       )}
+      {/* Edit Modal */}
+      <Dialog open={editModalOpen} onOpenChange={setEditModalOpen}>
+        <DialogContent className="sm:max-w-md">
+          <DialogHeader>
+            <DialogTitle>포트폴리오 이름 변경</DialogTitle>
+            <DialogDescription>
+              포트폴리오의 이름을 수정합니다.
+            </DialogDescription>
+          </DialogHeader>
+          <div className="space-y-4">
+            <div className="space-y-2">
+              <Label htmlFor="edit-name">이름</Label>
+              <Input
+                id="edit-name"
+                value={editName}
+                onChange={(e) => setEditName(e.target.value)}
+                placeholder="포트폴리오 이름"
+                onKeyDown={(e) => e.key === 'Enter' && handleSaveEdit()}
+              />
+            </div>
+          </div>
+          <DialogFooter>
+            <Button variant="outline" onClick={() => setEditModalOpen(false)} disabled={editSaving}>
+              취소
+            </Button>
+            <Button onClick={handleSaveEdit} disabled={editSaving || !editName.trim()}>
+              {editSaving ? '저장 중...' : '저장'}
+            </Button>
+          </DialogFooter>
+        </DialogContent>
+      </Dialog>
+
+      {/* Delete Confirmation Modal */}
+      <Dialog open={deleteModalOpen} onOpenChange={setDeleteModalOpen}>
+        <DialogContent className="sm:max-w-md">
+          <DialogHeader>
+            <DialogTitle>포트폴리오 삭제</DialogTitle>
+            <DialogDescription>
+              &quot;{deleteTarget?.name}&quot; 포트폴리오를 삭제하시겠습니까? 이 작업은 되돌릴 수 없습니다.
+            </DialogDescription>
+          </DialogHeader>
+          <DialogFooter>
+            <Button variant="outline" onClick={() => setDeleteModalOpen(false)} disabled={deleting}>
+              취소
+            </Button>
+            <Button variant="destructive" onClick={handleConfirmDelete} disabled={deleting}>
+              {deleting ? '삭제 중...' : '삭제'}
+            </Button>
+          </DialogFooter>
+        </DialogContent>
+      </Dialog>
     </DashboardLayout>
   );
 }