diff --git a/.jules/palette.md b/.jules/palette.md
index bd0f73248..44b78834b 100644
--- a/.jules/palette.md
+++ b/.jules/palette.md
@@ -57,3 +57,6 @@
 ## 2026-07-30 - Add window.confirm for destructive actions
 **Learning:** Destructive actions like deleting groups and edge relationships previously occurred immediately without user confirmation.
 **Action:** Always wrap delete operations with window.confirm() dialogs and ensure corresponding tests successfully mock window.confirm.
+## 2024-08-16 - 파괴적 액션에 대한 사용자 확인 추가
+**Learning:** 테이블 편집 모달 내 '테이블 삭제'와 같은 파괴적인 액션이 사용자 확인 없이 즉시 실행되어, 의도치 않은 데이터 손실을 초래할 수 있었습니다.
+**Action:** 파괴적인 작업을 수행하는 버튼의 이벤트 핸들러에는 항상 `window.confirm`을 사용하여 사용자의 명시적인 확인을 받도록 개선했습니다.
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 35613431a..708d09e80 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
 # Changelog
 
 ## Unreleased
+- [FE] 🛡️ **테이블 삭제 확인**: 테이블 편집 화면에서 삭제를 실행하기 전에 확인하여 실수로 인한 데이터 손실을 예방합니다.
 - [BE] 🔒 **Cryptography 50+ 보안 경계 갱신**: `pyproject.toml`과 두 hash-locked 요구사항 파일을 동일한 Cryptography 50+ 해석으로 정합화하여 PKCS#7 오류·타이밍 구분으로 인한 CVE-2026-69247 완화를 실제 설치·검증 경로에 반영했습니다.
 - [FE] ⚡ **검색 노드 참조 안정화 및 순차 스냅샷 폴링**: 같은 정규화 검색어와 원본 테이블 데이터에는 장식된 `node.data` 참조를 재사용하여 드래그 중 불필요한 하위 렌더링과 할당을 줄입니다. 스냅샷 폴링은 이전 요청이 끝난 뒤에만 다음 요청을 예약하며, 선택 변경·언마운트 후 도착한 오래된 성공 또는 실패 응답을 무시합니다.
 - [BE] 🔒 **공유 export 전 경로 redaction**: 공개 share의 SQL / index-design / reversing-spec export에서 코멘트·`example_value`를 제거합니다. 단위 테스트로 누출을 차단합니다.
diff --git a/frontend/CHANGELOG.md b/frontend/CHANGELOG.md
index c78944c31..ebe5c1362 100644
--- a/frontend/CHANGELOG.md
+++ b/frontend/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 ## [Unreleased]
 ### Added
+- **테이블 삭제 확인**: 테이블 편집 화면에서 삭제하기 전에 확인창을 표시하여 실수로 인한 데이터 손실을 예방합니다.
 - **테이블 및 컬럼 편집 기능**: UI 패널을 통해 노드를 선택하고, 테이블의 이름/코멘트를 수정하며, 컬럼을 추가/수정/삭제하거나 테이블을 삭제할 수 있는 기능 추가.
 - **테스트 추가**: 프론트엔드 테스트 커버리지 100% 목표 달성을 위해 `cardinality.ts`, `types.ts`, `export.ts` 의 미달성 분기 및 함수 테스트 추가 (`cardinality_extra.test.ts` 등).
 - `.gitignore` 파일에 `coverage/` 폴더를 추가하여 불필요한 테스트 아티팩트가 커밋되지 않도록 보완.
diff --git a/frontend/package-lock.json b/frontend/package-lock.json
index 2049d498a..235e350f5 100644
--- a/frontend/package-lock.json
+++ b/frontend/package-lock.json
@@ -791,9 +791,9 @@
       }
     },
     "node_modules/@testing-library/user-event": {
-      "version": "14.6.4",
-      "resolved": "https://registry.npmjs.org/@testing-library/user-event/-/user-event-14.6.4.tgz",
-      "integrity": "sha512-QCGwP6QrjypBLwyj5cuyfVamkaIEy/XGY+1VDehbtbQqOggYmTFpFOdWR5mPz14vX8vXLMVjDHlRNBcClyO9ew==",
+      "version": "14.6.5",
+      "resolved": "https://registry.npmjs.org/@testing-library/user-event/-/user-event-14.6.5.tgz",
+      "integrity": "sha512-FhqjldLTpteueBaKflhNFlMT3+PM0O5fiBUivht6b9CZ1eesJyy7+g3Jr7XwJzt/Hip3ZG5hWwK1MX1FuDiE4w==",
       "dev": true,
       "license": "MIT",
       "engines": {
@@ -1970,9 +1970,9 @@
       }
     },
     "node_modules/nanoid": {
-      "version": "3.3.16",
-      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.3.16.tgz",
-      "integrity": "sha512-bzlKTyNJ7+LdGIIwy8ijFpIqEQIvafahV7eYykJ8Cvh42EdJeODoJ6gUJXpQJvej1BddH8OqTXZNE/KfbWAu8Q==",
+      "version": "3.3.18",
+      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.3.18.tgz",
+      "integrity": "sha512-DTg4MJbGMWkfi6VZFdNt2/caMbQy4Ou+Op/hJQvGEWcnVfoA1QA+xzRKAzw9jD6+GVOOeYr/mIcuDSdug6F6+w==",
       "dev": true,
       "funding": [
         {
diff --git a/frontend/package.json b/frontend/package.json
index db0eacb61..ada824372 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -36,6 +36,7 @@
   },
   "overrides": {
     "esbuild": "^0.25.0",
+    "nanoid": "^3.3.18",
     "postcss": "^8.5.18"
   }
 }
diff --git a/frontend/src/App.coverage.test.tsx b/frontend/src/App.coverage.test.tsx
index 0b9a20aa8..67baf9c10 100644
--- a/frontend/src/App.coverage.test.tsx
+++ b/frontend/src/App.coverage.test.tsx
@@ -150,6 +150,7 @@ vi.mock('./components/modals', () => ({
           <button type="button" data-testid="export-uml" onClick={props.onDownloadUml} />
           <button type="button" data-testid="export-mermaid" onClick={props.onDownloadMermaid} />
           <button type="button" data-testid="export-dbml" onClick={props.onDownloadDbml} />
+          <button type="button" data-testid="export-prisma" onClick={props.onDownloadPrisma} />
           <button type="button" data-testid="export-csv" onClick={props.onExportDictionaryCsv} />
           <button type="button" data-testid="export-md" onClick={props.onExportDictionaryMarkdown} />
           <button type="button" data-testid="share-create" onClick={props.onCreateShareLink} />
@@ -414,8 +415,6 @@ describe('App orchestration coverage', () => {
     fireEvent.doubleClick(screen.getByTestId('flow-node'))
     fireEvent.click(screen.getByTestId('table-cancel'))
     fireEvent.doubleClick(screen.getByTestId('flow-node'))
-    vi.spyOn(window, 'confirm').mockReturnValueOnce(false).mockReturnValueOnce(true)
-    fireEvent.click(screen.getByTestId('table-delete'))
     fireEvent.click(screen.getByTestId('table-delete'))
   })
 
@@ -456,14 +455,14 @@ describe('App orchestration coverage', () => {
     fireEvent.click(screen.getByTestId('card-close'))
 
     fireEvent.click(screen.getByRole('button', { name: 'DDL 내보내기' }))
-    for (const id of ['export-copy-ddl', 'export-svg', 'export-uml', 'export-mermaid', 'export-dbml', 'export-csv', 'export-md']) {
+    for (const id of ['export-copy-ddl', 'export-svg', 'export-uml', 'export-mermaid', 'export-dbml', 'export-prisma', 'export-csv', 'export-md']) {
       fireEvent.click(screen.getByTestId(id))
     }
     fireEvent.click(screen.getByTestId('share-create'))
     await waitFor(() => expect(screen.getByTestId('share-url')).toHaveTextContent('/api/share/one'))
     fireEvent.click(screen.getByTestId('share-copy'))
     fireEvent.click(screen.getByTestId('export-close'))
-    expect(exports.downloadText).toHaveBeenCalledTimes(6)
+    expect(exports.downloadText).toHaveBeenCalledTimes(7)
 
     fireEvent.click(screen.getByRole('button', { name: '관계 자동 추론' }))
     expect(exports.inferRelationships).toHaveBeenCalled()
@@ -651,6 +650,51 @@ describe('App orchestration coverage', () => {
     expect(screen.getByRole('alert')).toHaveTextContent('terminal refresh down')
   })
 
+  it('ignores terminal refresh completions after the editor effect is cleaned up', async () => {
+    const projectTwoSnapshots = [
+      { schema_snapshot_uuid: 'p2-snapshot', status: 'succeeded', schema_filter: 'p2-only' },
+    ]
+    let resolveRefresh!: (value: typeof snapshots) => void
+    let rejectRefresh!: (reason: unknown) => void
+    let listSnapshotsCall = 0
+    api.listSnapshots.mockImplementation(() => {
+      listSnapshotsCall += 1
+      if (listSnapshotsCall === 1) return Promise.resolve(snapshots)
+      if (listSnapshotsCall === 2) {
+        return new Promise((resolve) => { resolveRefresh = resolve })
+      }
+      if (listSnapshotsCall === 3 || listSnapshotsCall === 4) {
+        return Promise.resolve(projectTwoSnapshots)
+      }
+      if (listSnapshotsCall === 5) return Promise.resolve(snapshots)
+      if (listSnapshotsCall === 6) {
+        return new Promise((_resolve, reject) => { rejectRefresh = reject })
+      }
+      return Promise.resolve(snapshots)
+    })
+    await renderReadyApp()
+    await waitFor(() => expect(api.listSnapshots).toHaveBeenCalled())
+    fireEvent.click(screen.getByRole('button', { name: '다이어그램' }))
+    await waitFor(() => expect(screen.getAllByRole('button', { name: '열기' }).length).toBeGreaterThan(0))
+    fireEvent.click(screen.getAllByRole('button', { name: '열기' })[0]!)
+    await waitFor(() => expect(resolveRefresh).toBeTypeOf('function'))
+    fireEvent.change(screen.getByLabelText('Project'), { target: { value: 'p2' } })
+    await waitFor(() => expect(listSnapshotsCall).toBe(4))
+    fireEvent.click(screen.getByRole('button', { name: '다이어그램' }))
+    expect(await screen.findByText('ERD_p2-only_1')).toBeInTheDocument()
+    await act(async () => resolveRefresh(snapshots))
+    expect(screen.getByText('ERD_p2-only_1')).toBeInTheDocument()
+    expect(screen.queryByText('ERD_billing_1')).not.toBeInTheDocument()
+
+    fireEvent.click(screen.getByRole('button', { name: '편집기' }))
+    fireEvent.change(screen.getByLabelText('Project'), { target: { value: 'p1' } })
+    await waitFor(() => expect(rejectRefresh).toBeTypeOf('function'))
+    fireEvent.change(screen.getByLabelText('Project'), { target: { value: 'p2' } })
+    await waitFor(() => expect(listSnapshotsCall).toBe(8))
+    await act(async () => rejectRefresh(new Error('late terminal refresh')))
+    expect(screen.queryByText(/late terminal refresh/)).not.toBeInTheDocument()
+  })
+
   it('ignores stale project metadata failures after changing projects', async () => {
     let rejectConnections!: (reason: unknown) => void
     let rejectSnapshots!: (reason: unknown) => void
diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index 49812e448..e42d611be 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -340,6 +340,7 @@ export default function App() {
           return;
         }
 
+        /* v8 ignore next -- after the current response guard, cleanup cannot interleave with this synchronous branch */
         if (isCurrent) {
           timer = window.setTimeout(poll, 1000);
         }
@@ -862,7 +863,6 @@ export default function App() {
 
   function onDeleteTable() {
     if (!editingNode) return;
-    if (!window.confirm("정말로 이 테이블을 삭제하시겠습니까?")) return;
 
     // Remove the node
     setNodes((nds) => nds.filter((n) => n.id !== editingNode.id));
diff --git a/frontend/src/components/modals/EditTableModal.tsx b/frontend/src/components/modals/EditTableModal.tsx
index 998929d44..0eac269a9 100644
--- a/frontend/src/components/modals/EditTableModal.tsx
+++ b/frontend/src/components/modals/EditTableModal.tsx
@@ -189,7 +189,10 @@ export function EditTableModal({
           <div className="row" style={{ gap: 8 }}>
             <button
               type="button"
-              onClick={onDeleteTable}
+              onClick={() => {
+                if (!window.confirm("정말로 이 테이블을 삭제하시겠습니까?")) return;
+                onDeleteTable();
+              }}
               style={{ color: "#b91c1c", borderColor: "#fca5a5" }}
             >
               테이블 삭제
diff --git a/frontend/src/components/modals/ModalCoverage.test.tsx b/frontend/src/components/modals/ModalCoverage.test.tsx
index 8732f7efa..d6f7cd0fd 100644
--- a/frontend/src/components/modals/ModalCoverage.test.tsx
+++ b/frontend/src/components/modals/ModalCoverage.test.tsx
@@ -116,7 +116,8 @@ describe('modal behavior coverage', () => {
     fireEvent.change(screen.getByLabelText('제약조건 이름 (Label)'), {
       target: { value: 'fk_changed' },
     })
-    vi.spyOn(window, 'confirm').mockReturnValueOnce(true)
+    vi.spyOn(window, 'confirm').mockReturnValueOnce(false).mockReturnValueOnce(true)
+    fireEvent.click(screen.getByRole('button', { name: '삭제' }))
     fireEvent.click(screen.getByRole('button', { name: '삭제' }))
     expect(window.confirm).toHaveBeenCalledWith("이 관계를 삭제하시겠습니까?")
     fireEvent.click(screen.getByRole('button', { name: '취소' }))
@@ -183,7 +184,15 @@ describe('modal behavior coverage', () => {
     expect(deleteEditing(tableNode)?.data.columns).toHaveLength(1)
 
     fireEvent.submit(document.getElementById('editTableForm')!)
+
+    const confirmSpy = vi.spyOn(window, 'confirm')
+    confirmSpy.mockReturnValueOnce(false)
+    fireEvent.click(screen.getByRole('button', { name: '테이블 삭제' }))
+    expect(onDeleteTable).not.toHaveBeenCalled()
+
+    confirmSpy.mockReturnValueOnce(true)
     fireEvent.click(screen.getByRole('button', { name: '테이블 삭제' }))
+
     fireEvent.click(screen.getByRole('button', { name: '복제' }))
     const duplicate = setNodes.mock.calls[2]?.[0] as (nodes: Node<TableNodeData>[]) => Node<TableNodeData>[]
     const duplicated = duplicate([tableNode])[1]!
@@ -245,6 +254,8 @@ describe('modal behavior coverage', () => {
     )
     expect(screen.getByText('등록된 그룹이 없습니다.')).toBeInTheDocument()
     expect(screen.getByRole('button', { name: '추가' })).toBeDisabled()
+    fireEvent.submit(screen.getByRole('button', { name: '추가' }).closest('form')!)
+    expect(onCreate).not.toHaveBeenCalled()
 
     rerender(
       <GroupModal
@@ -264,7 +275,8 @@ describe('modal behavior coverage', () => {
     fireEvent.change(screen.getByLabelText('그룹 이름'), { target: { value: 'New' } })
     fireEvent.click(screen.getAllByRole('button', { name: /^색상 / })[1]!)
     fireEvent.click(screen.getByRole('button', { name: '추가' }))
-    vi.spyOn(window, 'confirm').mockReturnValueOnce(true)
+    vi.spyOn(window, 'confirm').mockReturnValueOnce(false).mockReturnValueOnce(true)
+    fireEvent.click(screen.getByRole('button', { name: 'Billing 그룹 삭제' }))
     fireEvent.click(screen.getByRole('button', { name: 'Billing 그룹 삭제' }))
     expect(window.confirm).toHaveBeenCalledWith("'Billing' 그룹을 삭제하시겠습니까?")
     fireEvent.change(screen.getByRole('combobox'), { target: { value: '' } })
diff --git a/frontend/src/erd/__tests__/prisma.test.ts b/frontend/src/erd/__tests__/prisma.test.ts
index 73bca1a66..7b720ca10 100644
--- a/frontend/src/erd/__tests__/prisma.test.ts
+++ b/frontend/src/erd/__tests__/prisma.test.ts
@@ -184,11 +184,13 @@ describe('exportPrisma', () => {
     const edges: Edge[] = [
       { id: 'e1', source: 'invalid', target: '2' },
       { id: 'e2', source: '1', target: '2' },
+      { id: 'e3', source: '1', target: '2', sourceHandle: 'invalid-handle' },
     ];
 
     const result = exportPrisma(nodes, edges);
     expect(result).toContain('model A');
     expect(result).toContain('model B');
+    expect(result).not.toContain('@relation(');
   });
 
   it('handles missing is_not_null logic for optional relationships', () => {
@@ -228,10 +230,19 @@ describe('exportPrisma', () => {
         targetHandle: 'tgt-id',
         label: '1to1',
       },
+      {
+        id: 'e2',
+        source: '2',
+        target: '1',
+        sourceHandle: 'src-id',
+        targetHandle: 'tgt-id',
+        label: 'profile_identity',
+      },
     ];
 
     const result = exportPrisma(nodes, edges);
     expect(result).toContain('users_user_id users? @relation("M_1to1", fields: [user_id], references: [id])');
     expect(result).toContain('profiles_user_id profiles[] @relation("M_1to1")');
+    expect(result).toContain('profiles_id profiles? @relation("profile_identity")');
   });
 });