diff --git a/viewer/src/components/LanguageSelectBox.js b/viewer/components/LanguageSelectBox.js
similarity index 100%
rename from viewer/src/components/LanguageSelectBox.js
rename to viewer/components/LanguageSelectBox.js
diff --git a/viewer/src/components/DynamicForm.js b/viewer/effort_js/src/components/DynamicForm.js
similarity index 100%
rename from viewer/src/components/DynamicForm.js
rename to viewer/effort_js/src/components/DynamicForm.js
diff --git a/viewer/src/components/DynamicTable.js b/viewer/effort_js/src/components/DynamicTable.js
similarity index 100%
rename from viewer/src/components/DynamicTable.js
rename to viewer/effort_js/src/components/DynamicTable.js
diff --git a/viewer/src/components/ErrorDisplay.js b/viewer/effort_js/src/components/ErrorDisplay.js
similarity index 100%
rename from viewer/src/components/ErrorDisplay.js
rename to viewer/effort_js/src/components/ErrorDisplay.js
diff --git a/viewer/src/components/Header.js b/viewer/effort_js/src/components/Header.js
similarity index 100%
rename from viewer/src/components/Header.js
rename to viewer/effort_js/src/components/Header.js
diff --git a/viewer/src/components/MainLayout.js b/viewer/effort_js/src/components/MainLayout.js
similarity index 100%
rename from viewer/src/components/MainLayout.js
rename to viewer/effort_js/src/components/MainLayout.js
diff --git a/viewer/src/components/ProjectSelectBox.js b/viewer/effort_js/src/components/ProjectSelectBox.js
similarity index 100%
rename from viewer/src/components/ProjectSelectBox.js
rename to viewer/effort_js/src/components/ProjectSelectBox.js
diff --git a/viewer/src/components/ThemeSelectBox.js b/viewer/effort_js/src/components/ThemeSelectBox.js
similarity index 100%
rename from viewer/src/components/ThemeSelectBox.js
rename to viewer/effort_js/src/components/ThemeSelectBox.js
diff --git a/viewer/src/components/UserProfileBox.js b/viewer/effort_js/src/components/UserProfileBox.js
similarity index 100%
rename from viewer/src/components/UserProfileBox.js
rename to viewer/effort_js/src/components/UserProfileBox.js
diff --git a/viewer/src/components/providers/ThemeProvider.js b/viewer/effort_js/src/components/providers/ThemeProvider.js
similarity index 100%
rename from viewer/src/components/providers/ThemeProvider.js
rename to viewer/effort_js/src/components/providers/ThemeProvider.js
diff --git a/viewer/src/components/ui/button.js b/viewer/effort_js/src/components/ui/button.js
similarity index 100%
rename from viewer/src/components/ui/button.js
rename to viewer/effort_js/src/components/ui/button.js
diff --git a/viewer/src/components/ui/calendar.js b/viewer/effort_js/src/components/ui/calendar.js
similarity index 100%
rename from viewer/src/components/ui/calendar.js
rename to viewer/effort_js/src/components/ui/calendar.js
diff --git a/viewer/src/components/ui/card.js b/viewer/effort_js/src/components/ui/card.js
similarity index 100%
rename from viewer/src/components/ui/card.js
rename to viewer/effort_js/src/components/ui/card.js
diff --git a/viewer/src/components/ui/dropdown-menu.js b/viewer/effort_js/src/components/ui/dropdown-menu.js
similarity index 100%
rename from viewer/src/components/ui/dropdown-menu.js
rename to viewer/effort_js/src/components/ui/dropdown-menu.js
diff --git a/viewer/src/components/ui/input.js b/viewer/effort_js/src/components/ui/input.js
similarity index 100%
rename from viewer/src/components/ui/input.js
rename to viewer/effort_js/src/components/ui/input.js
diff --git a/viewer/src/components/ui/label.js b/viewer/effort_js/src/components/ui/label.js
similarity index 100%
rename from viewer/src/components/ui/label.js
rename to viewer/effort_js/src/components/ui/label.js
diff --git a/viewer/src/components/ui/popover.js b/viewer/effort_js/src/components/ui/popover.js
similarity index 100%
rename from viewer/src/components/ui/popover.js
rename to viewer/effort_js/src/components/ui/popover.js
diff --git a/viewer/src/components/ui/select.js b/viewer/effort_js/src/components/ui/select.js
similarity index 100%
rename from viewer/src/components/ui/select.js
rename to viewer/effort_js/src/components/ui/select.js
diff --git a/viewer/src/components/ui/separator.js b/viewer/effort_js/src/components/ui/separator.js
similarity index 100%
rename from viewer/src/components/ui/separator.js
rename to viewer/effort_js/src/components/ui/separator.js
diff --git a/viewer/src/components/ui/table.js b/viewer/effort_js/src/components/ui/table.js
similarity index 100%
rename from viewer/src/components/ui/table.js
rename to viewer/effort_js/src/components/ui/table.js
diff --git a/viewer/src/components/ui/textarea.js b/viewer/effort_js/src/components/ui/textarea.js
similarity index 100%
rename from viewer/src/components/ui/textarea.js
rename to viewer/effort_js/src/components/ui/textarea.js
diff --git a/viewer/src/lib/utils.js b/viewer/effort_js/src/lib/utils.js
similarity index 100%
rename from viewer/src/lib/utils.js
rename to viewer/effort_js/src/lib/utils.js
diff --git a/viewer/src/pages/FeedbackCreatePage.js b/viewer/effort_js/src/pages/FeedbackCreatePage.js
similarity index 100%
rename from viewer/src/pages/FeedbackCreatePage.js
rename to viewer/effort_js/src/pages/FeedbackCreatePage.js
diff --git a/viewer/src/pages/FeedbackDetailPage.js b/viewer/effort_js/src/pages/FeedbackDetailPage.js
similarity index 100%
rename from viewer/src/pages/FeedbackDetailPage.js
rename to viewer/effort_js/src/pages/FeedbackDetailPage.js
diff --git a/viewer/src/pages/FeedbackListPage.js b/viewer/effort_js/src/pages/FeedbackListPage.js
similarity index 100%
rename from viewer/src/pages/FeedbackListPage.js
rename to viewer/effort_js/src/pages/FeedbackListPage.js
diff --git a/viewer/src/pages/IssueViewerPage.js b/viewer/effort_js/src/pages/IssueViewerPage.js
similarity index 100%
rename from viewer/src/pages/IssueViewerPage.js
rename to viewer/effort_js/src/pages/IssueViewerPage.js
diff --git a/viewer/src/services/error.js b/viewer/effort_js/src/services/error.js
similarity index 100%
rename from viewer/src/services/error.js
rename to viewer/effort_js/src/services/error.js
diff --git a/viewer/src/services/feedback.js b/viewer/effort_js/src/services/feedback.js
similarity index 98%
rename from viewer/src/services/feedback.js
rename to viewer/effort_js/src/services/feedback.js
index 5996da9..0c52058 100644
--- a/viewer/src/services/feedback.js
+++ b/viewer/effort_js/src/services/feedback.js
@@ -1,5 +1,5 @@
 // src/services/feedback.ts
-import { handleApiError } from "./error";
+import { handleApiError } from "../../../src/services/error";
 // --- API 함수 ---
 const getFeedbacksSearchApiUrl = (projectId, channelId) =>
 	`/api/v2/projects/${projectId}/channels/${channelId}/feedbacks/search`;
diff --git a/viewer/src/services/issue.js b/viewer/effort_js/src/services/issue.js
similarity index 92%
rename from viewer/src/services/issue.js
rename to viewer/effort_js/src/services/issue.js
index eaa253b..0ac14e7 100644
--- a/viewer/src/services/issue.js
+++ b/viewer/effort_js/src/services/issue.js
@@ -1,5 +1,5 @@
 // src/services/issue.ts
-import { handleApiError } from "./error";
+import { handleApiError } from "../../../src/services/error";
 /**
  * 특정 프로젝트의 모든 이슈를 검색합니다.
  * @param projectId 프로젝트 ID
diff --git a/viewer/src/services/project.js b/viewer/effort_js/src/services/project.js
similarity index 100%
rename from viewer/src/services/project.js
rename to viewer/effort_js/src/services/project.js
diff --git a/viewer/vite.config.js b/viewer/effort_js/src/vite.config.js
similarity index 100%
rename from viewer/vite.config.js
rename to viewer/effort_js/src/vite.config.js
diff --git a/viewer/src/components/Header.tsx b/viewer/src/components/Header.tsx
index 21ac292..0124925 100644
--- a/viewer/src/components/Header.tsx
+++ b/viewer/src/components/Header.tsx
@@ -1,3 +1,4 @@
+import { cn } from "@/lib/utils";
 import { NavLink } from "react-router-dom";
 import { ProjectSelectBox } from "./ProjectSelectBox";
 import { ThemeSelectBox } from "./ThemeSelectBox";
@@ -10,7 +11,11 @@ const menuItems = [
 	{ name: "Issue", path: "/issues", type: "issue" },
 ];
 
-export function Header() {
+interface HeaderProps {
+	className?: string;
+}
+
+export function Header({ className }: HeaderProps) {
 	const { projectId, channelId } = useSettingsStore();
 
 	const getPath = (type: string, basePath: string) => {
@@ -23,7 +28,12 @@ export function Header() {
 	const homePath = `/projects/${projectId}`;
 
 	return (
-		<header className="flex h-16 items-center justify-between border-b px-6">
+		<header
+			className={cn(
+				"flex h-16 items-center justify-between border-b px-6",
+				className,
+			)}
+		>
 			<div className="flex items-center gap-6">
 				<NavLink
 					to={homePath}
diff --git a/viewer/src/components/MainLayout.tsx b/viewer/src/components/MainLayout.tsx
index f08ba82..80787ba 100644
--- a/viewer/src/components/MainLayout.tsx
+++ b/viewer/src/components/MainLayout.tsx
@@ -5,8 +5,8 @@ import { Header } from "./Header";
 export function MainLayout() {
 	return (
 		<div className="flex flex-col min-h-screen">
-			<Header />
-			<main className="flex-1 p-6">
+			<Header className="sticky top-0 z-50 bg-background" />
+			<main className="flex-1 container mx-auto p-6">
 				<Outlet />
 			</main>
 		</div>
diff --git a/viewer/src/pages/FeedbackCreatePage.tsx b/viewer/src/pages/FeedbackCreatePage.tsx
index 7104562..88b4acd 100644
--- a/viewer/src/pages/FeedbackCreatePage.tsx
+++ b/viewer/src/pages/FeedbackCreatePage.tsx
@@ -4,9 +4,9 @@ import { useSettingsStore } from "@/store/useSettingsStore";
 import { useSyncChannelId } from "@/hooks/useSyncChannelId";
 import { DynamicForm } from "@/components/DynamicForm";
 import {
-	getFeedbackSchema,
+	getFeedbackFields,
 	createFeedback,
-	type FeedbackSchema,
+	type FeedbackField,
 	type CreateFeedbackRequest,
 } from "@/services/feedback";
 import { ErrorDisplay } from "@/components/ErrorDisplay";
@@ -17,7 +17,7 @@ export function FeedbackCreatePage() {
 	const navigate = useNavigate();
 	const { projectId, channelId } = useSettingsStore();
 
-	const [schema, setSchema] = useState<FeedbackSchema | null>(null);
+	const [schema, setSchema] = useState<FeedbackField[] | null>(null);
 	const [loading, setLoading] = useState<boolean>(true);
 	const [error, setError] = useState<string | null>(null);
 	const [submitMessage, setSubmitMessage] = useState<string | null>(null);
@@ -28,8 +28,13 @@ export function FeedbackCreatePage() {
 		const fetchSchema = async () => {
 			try {
 				setLoading(true);
-				const schemaData = await getFeedbackSchema(projectId, channelId);
-				setSchema(schemaData);
+				const schemaData = await getFeedbackFields(projectId, channelId);
+				// ID, Created, Updated, Issue 필드 제외
+				const filteredSchema = schemaData.filter(
+					(field) =>
+						!["id", "createdAt", "updatedAt", "issues"].includes(field.id),
+				);
+				setSchema(filteredSchema);
 			} catch (err) {
 				setError(
 					err instanceof Error ? err.message : "폼을 불러오는 데 실패했습니다.",
@@ -91,7 +96,7 @@ export function FeedbackCreatePage() {
 			<Separator />
 			{schema && (
 				<DynamicForm
-					schema={schema}
+					fields={schema}
 					onSubmit={handleSubmit}
 					submitButtonText="제출하기"
 				/>
diff --git a/viewer/src/pages/FeedbackDetailPage.tsx b/viewer/src/pages/FeedbackDetailPage.tsx
index 17c8cdb..3e00cf9 100644
--- a/viewer/src/pages/FeedbackDetailPage.tsx
+++ b/viewer/src/pages/FeedbackDetailPage.tsx
@@ -7,6 +7,12 @@ import {
 	updateFeedback,
 } from "@/services/feedback";
 import { ErrorDisplay } from "@/components/ErrorDisplay";
+import {
+	Card,
+	CardContent,
+	CardHeader,
+	CardTitle,
+} from "@/components/ui/card";
 import { Separator } from "@/components/ui/separator";
 
 export function FeedbackDetailPage() {
@@ -128,31 +134,35 @@ export function FeedbackDetailPage() {
 				</p>
 			</div>
 			<Separator />
-			<div className="mt-6">
-				<div className="flex justify-between items-center mb-4 p-3 bg-slate-50 rounded-md">
-					<span className="text-sm font-medium text-slate-600">
-						ID: {feedback?.id}
-					</span>
-					<span className="text-sm text-slate-500">
-						생성일:{" "}
-						{feedback?.createdAt
-							? new Date(feedback.createdAt).toLocaleString("ko-KR")
-							: "N/A"}
-					</span>
-				</div>
-
-				<DynamicForm
-					fields={fields}
-					initialData={initialData}
-					onSubmit={handleSubmit}
-					submitButtonText="수정하기"
-				/>
-				{successMessage && (
-					<div className="mt-4 p-3 bg-green-100 text-green-800 rounded-md">
-						{successMessage}
+			<Card className="mt-6">
+				<CardHeader>
+					<div className="flex justify-between items-center">
+						<CardTitle>피드백 정보</CardTitle>
+						<div className="flex items-center gap-4 text-sm text-slate-500">
+							<span>ID: {feedback?.id}</span>
+							<span>
+								생성일:{" "}
+								{feedback?.createdAt
+									? new Date(feedback.createdAt).toLocaleString("ko-KR")
+									: "N/A"}
+							</span>
+						</div>
 					</div>
-				)}
-			</div>
+				</CardHeader>
+				<CardContent>
+					<DynamicForm
+						fields={fields}
+						initialData={initialData}
+						onSubmit={handleSubmit}
+						submitButtonText="수정하기"
+					/>
+					{successMessage && (
+						<div className="mt-4 p-3 bg-green-100 text-green-800 rounded-md">
+							{successMessage}
+						</div>
+					)}
+				</CardContent>
+			</Card>
 		</div>
 	);
 }
diff --git a/viewer/src/pages/FeedbackListPage.tsx b/viewer/src/pages/FeedbackListPage.tsx
index 78d19d8..b53239a 100644
--- a/viewer/src/pages/FeedbackListPage.tsx
+++ b/viewer/src/pages/FeedbackListPage.tsx
@@ -5,9 +5,9 @@ import { useSyncChannelId } from "@/hooks/useSyncChannelId";
 import { DynamicTable } from "@/components/DynamicTable";
 import {
 	getFeedbacks,
-	getFeedbackSchema,
+	getFeedbackFields,
 	type Feedback,
-	type FeedbackSchema,
+	type FeedbackField,
 } from "@/services/feedback";
 import { ErrorDisplay } from "@/components/ErrorDisplay";
 import { Button } from "@/components/ui/button";
@@ -17,7 +17,7 @@ export function FeedbackListPage() {
 	const { projectId, channelId } = useSettingsStore();
 	const navigate = useNavigate();
 
-	const [schema, setSchema] = useState<FeedbackSchema | null>(null);
+	const [schema, setSchema] = useState<FeedbackField[] | null>(null);
 	const [feedbacks, setFeedbacks] = useState<Feedback[]>([]);
 	const [loading, setLoading] = useState<boolean>(true);
 	const [error, setError] = useState<string | null>(null);
@@ -30,7 +30,7 @@ export function FeedbackListPage() {
 				setLoading(true);
 				setError(null);
 
-				const schemaData = await getFeedbackSchema(projectId, channelId);
+				const schemaData = await getFeedbackFields(projectId, channelId);
 				setSchema(schemaData);
 
 				const feedbacksData = await getFeedbacks(projectId, channelId);
@@ -67,11 +67,13 @@ export function FeedbackListPage() {
 			</div>
 			{error && <ErrorDisplay message={error} />}
 			{schema && (
-				<DynamicTable
-					schema={schema}
-					data={feedbacks}
-					onRowClick={handleRowClick}
-				/>
+				<div className="mt-6">
+					<DynamicTable
+						columns={schema}
+						data={feedbacks}
+						onRowClick={handleRowClick}
+					/>
+				</div>
 			)}
 		</div>
 	);
diff --git a/viewer/src/services/feedback.ts b/viewer/src/services/feedback.ts
index e480b39..400676b 100644
--- a/viewer/src/services/feedback.ts
+++ b/viewer/src/services/feedback.ts
@@ -188,5 +188,11 @@ export const updateFeedback = async (
 	if (!response.ok) {
 		await handleApiError("피드백 수정에 실패했습니다.", response);
 	}
+
+	const contentLength = response.headers.get("Content-Length");
+	if (contentLength === "0" || !contentLength) {
+		return {} as Feedback; // 혹은 적절한 기본 객체
+	}
+
 	return response.json();
 };
diff --git a/viewer/src/store/useSettingsStore.ts b/viewer/src/store/useSettingsStore.ts
index 81dc0db..b09bf16 100644
--- a/viewer/src/store/useSettingsStore.ts
+++ b/viewer/src/store/useSettingsStore.ts
@@ -1,11 +1,23 @@
 import { create } from "zustand";
 import { persist } from "zustand/middleware";
-export const useSettingsStore = create()(
+
+interface SettingsState {
+	projectId: string;
+	channelId: string;
+	theme: "light" | "dark" | "system";
+	setProjectId: (projectId: string) => void;
+	setChannelId: (channelId: string) => void;
+	setTheme: (theme: "light" | "dark" | "system") => void;
+}
+
+export const useSettingsStore = create<SettingsState>()(
 	persist(
 		(set) => ({
-			projectId: "1", // 기본 프로젝트 ID를 1로 설정
+			projectId: "1", // 기본 프로젝트 ID
+			channelId: "4", // 기본 채널 ID
 			theme: "system",
 			setProjectId: (projectId) => set({ projectId }),
+			setChannelId: (channelId) => set({ channelId }),
 			setTheme: (theme) => set({ theme }),
 		}),
 		{
@@ -13,3 +25,4 @@ export const useSettingsStore = create()(
 		},
 	),
 );
+
diff --git a/viewer/tsconfig.json b/viewer/tsconfig.json
index c955ba6..bf9832c 100644
--- a/viewer/tsconfig.json
+++ b/viewer/tsconfig.json
@@ -8,6 +8,7 @@
 
 		/* Bundler mode */
 		"moduleResolution": "bundler",
+		"allowJs": false,
 		"allowImportingTsExtensions": true,
 		"resolveJsonModule": true,
 		"isolatedModules": true,
@@ -25,5 +26,5 @@
 			"@/*": ["./src/*"]
 		}
 	},
-	"include": ["src"]
+	"include": ["src", "effort_js/src/services/error.js", "effort_js/src/services/feedback.js", "effort_js/src/services/issue.js", "effort_js/src/services/project.js"]
 }
diff --git a/viewer/vite.config.ts b/viewer/vite.config.ts
index 10a133b..8efd243 100644
--- a/viewer/vite.config.ts
+++ b/viewer/vite.config.ts
@@ -18,6 +18,7 @@ export default defineConfig(({ mode }) => {
 			alias: {
 				"@": path.resolve(__dirname, "./src"),
 			},
+			extensions: [".ts", ".tsx", ".mjs", ".mts", ".json"],
 		},
 		server: {
 			proxy: {