diff --git a/Makefile b/Makefile
index 66f038db..a22693d4 100644
--- a/Makefile
+++ b/Makefile
@@ -14,9 +14,13 @@ license-check:
 	scripts/update_go_license.sh --check
 
 prettier:
-	@echo "==> Formatting backend Go source..."
-	gofmt -w $$(find . -type f -name '*.go' -not -path './.git/*' -not -path './frontend/*')
-	@echo "==> Formatting frontend source..."
+	@echo "==> Formatting backend Go source and removing unused imports..."
+	@command -v goimports >/dev/null 2>&1 || { \
+		echo "goimports not found, installing..."; \
+		go install golang.org/x/tools/cmd/goimports@latest; \
+	}
+	goimports -w $$(find . -type f -name '*.go' -not -path './.git/*' -not -path './frontend/*')
+	@echo "==> Formatting frontend source and removing unused imports..."
 	cd frontend && pnpm format
 
 build-embedded:
diff --git a/frontend/app/(main)/pages/detail/components/danger-zone-card.tsx b/frontend/app/(main)/pages/detail/components/danger-zone-card.tsx
index f16ef52f..9995c702 100644
--- a/frontend/app/(main)/pages/detail/components/danger-zone-card.tsx
+++ b/frontend/app/(main)/pages/detail/components/danger-zone-card.tsx
@@ -20,7 +20,6 @@ import { Button } from '@/components/ui/button';
 import {
   Card,
   CardContent,
-  CardDescription,
   CardHeader,
   CardTitle,
 } from '@/components/ui/card';
diff --git a/frontend/eslint.config.mjs b/frontend/eslint.config.mjs
index fa167c8d..4e728f12 100644
--- a/frontend/eslint.config.mjs
+++ b/frontend/eslint.config.mjs
@@ -1,6 +1,7 @@
 import { dirname } from 'path';
 import { fileURLToPath } from 'url';
 import { FlatCompat } from '@eslint/eslintrc';
+import unusedImports from 'eslint-plugin-unused-imports';
 
 const __filename = fileURLToPath(import.meta.url);
 const __dirname = dirname(__filename);
@@ -20,6 +21,25 @@ const eslintConfig = [
       'next-env.d.ts',
     ],
   },
+  {
+    plugins: {
+      'unused-imports': unusedImports,
+    },
+    rules: {
+      // Prefer unused-imports so unused imports can be auto-removed with --fix.
+      '@typescript-eslint/no-unused-vars': 'off',
+      'unused-imports/no-unused-imports': 'error',
+      'unused-imports/no-unused-vars': [
+        'warn',
+        {
+          vars: 'all',
+          varsIgnorePattern: '^_',
+          args: 'after-used',
+          argsIgnorePattern: '^_',
+        },
+      ],
+    },
+  },
 ];
 
 export default eslintConfig;
diff --git a/frontend/package.json b/frontend/package.json
index 4a199d34..f8a7ed16 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -93,6 +93,7 @@
     "@types/react-dom": "^19",
     "eslint": "^9",
     "eslint-config-next": "15.5.6",
+    "eslint-plugin-unused-imports": "^4.4.1",
     "jsdom": "^29.1.1",
     "prettier": "^3.9.5",
     "tailwindcss": "^4",
diff --git a/frontend/pnpm-lock.yaml b/frontend/pnpm-lock.yaml
index d2ce924d..73b5ace3 100644
--- a/frontend/pnpm-lock.yaml
+++ b/frontend/pnpm-lock.yaml
@@ -243,6 +243,9 @@ importers:
       eslint-config-next:
         specifier: 15.5.6
         version: 15.5.6(eslint@9.39.1(jiti@2.6.1))(typescript@5.9.3)
+      eslint-plugin-unused-imports:
+        specifier: ^4.4.1
+        version: 4.4.1(@typescript-eslint/eslint-plugin@8.46.3(@typescript-eslint/parser@8.46.3(eslint@9.39.1(jiti@2.6.1))(typescript@5.9.3))(eslint@9.39.1(jiti@2.6.1))(typescript@5.9.3))(eslint@9.39.1(jiti@2.6.1))
       jsdom:
         specifier: ^29.1.1
         version: 29.1.1
@@ -2746,6 +2749,15 @@ packages:
     peerDependencies:
       eslint: ^3 || ^4 || ^5 || ^6 || ^7 || ^8 || ^9.7
 
+  eslint-plugin-unused-imports@4.4.1:
+    resolution: {integrity: sha512-oZGYUz1X3sRMGUB+0cZyK2VcvRX5lm/vB56PgNNcU+7ficUCKm66oZWKUubXWnOuPjQ8PvmXtCViXBMONPe7tQ==}
+    peerDependencies:
+      '@typescript-eslint/eslint-plugin': ^8.0.0-0 || ^7.0.0 || ^6.0.0 || ^5.0.0
+      eslint: ^10.0.0 || ^9.0.0 || ^8.0.0
+    peerDependenciesMeta:
+      '@typescript-eslint/eslint-plugin':
+        optional: true
+
   eslint-scope@8.4.0:
     resolution: {integrity: sha512-sNXOfKCn74rt8RICKMvJS7XKV/Xk9kA7DyJr8mJik3S7Cwgy3qlkkmyS2uQB3jiJg6VNdZd/pDBJu0nvG2NlTg==}
     engines: {node: ^18.18.0 || ^20.9.0 || >=21.1.0}
@@ -7131,6 +7143,12 @@ snapshots:
       string.prototype.matchall: 4.0.12
       string.prototype.repeat: 1.0.0
 
+  eslint-plugin-unused-imports@4.4.1(@typescript-eslint/eslint-plugin@8.46.3(@typescript-eslint/parser@8.46.3(eslint@9.39.1(jiti@2.6.1))(typescript@5.9.3))(eslint@9.39.1(jiti@2.6.1))(typescript@5.9.3))(eslint@9.39.1(jiti@2.6.1)):
+    dependencies:
+      eslint: 9.39.1(jiti@2.6.1)
+    optionalDependencies:
+      '@typescript-eslint/eslint-plugin': 8.46.3(@typescript-eslint/parser@8.46.3(eslint@9.39.1(jiti@2.6.1))(typescript@5.9.3))(eslint@9.39.1(jiti@2.6.1))(typescript@5.9.3)
+
   eslint-scope@8.4.0:
     dependencies:
       esrecurse: 4.3.0