From d22f8cc29276a46dfff51e5c43cdddd5af385f45 Mon Sep 17 00:00:00 2001
From: SquidSpirit <squid@squidspirit.com>
Date: Wed, 15 Oct 2025 12:21:41 +0800
Subject: [PATCH] BLOG-140 Label management (list and create) (#144)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

### Description

- As the title.

### Package Changes

_No response_

### Screenshots

|Scenario|Screenshot|
|-|-|
|Label list|![截圖 2025-10-15 中午12.00.39.png](/attachments/e27ad38b-86ba-4791-9e33-3fbc1b77f3ad)|
|Create dialog|![截圖 2025-10-15 中午12.02.37.png](/attachments/aa3edda3-b97a-42b7-89dd-67fc9d2fe51e)|
|Input error|![截圖 2025-10-15 中午12.01.30.png](/attachments/daafb0f7-51e1-429d-883d-b1c867e009ad)|
|Name conflict|![截圖 2025-10-15 中午12.06.17.png](/attachments/1b866144-e37a-41ed-9011-f24b89d89368)|

### Reference

Reference #140.

### Checklist

- [x] A milestone is set
- [x] The related issuse has been linked to this branch

Reviewed-on: https://git.squidspirit.com/squid/blog/pulls/144
Co-authored-by: SquidSpirit <squid@squidspirit.com>
Co-committed-by: SquidSpirit <squid@squidspirit.com>
---
 .../auth/adapter/gateway/userResponseDto.ts   |   4 +-
 frontend/src/lib/container.ts                 |  45 ++++++-
 .../adapter/gateway/imageInfoResponseDto.ts   |   4 +-
 .../{colorResponseDto.ts => colorDto.ts}      |  23 +++-
 .../adapter/gateway/createLabelRequestDto.ts  |  26 ++++
 .../label/adapter/gateway/labelApiService.ts  |   7 +
 .../adapter/gateway/labelRepositoryImpl.ts    |  22 +++
 .../label/adapter/gateway/labelResponseDto.ts |  14 +-
 .../label/adapter/presenter/colorViewModel.ts |  24 +++-
 .../adapter/presenter/labelCreatedStore.ts    |  40 ++++++
 .../adapter/presenter/labelsListedStore.ts    |  46 +++++++
 .../application/gateway/labelRepository.ts    |  12 ++
 .../application/useCase/createLabelUseCase.ts |  13 ++
 .../useCase/getAllLabelsUseCase.ts            |  10 ++
 .../framework/api/labelApiServiceImpl.ts      |  39 ++++++
 .../framework/ui/CreateLabelDialog.svelte     | 127 ++++++++++++++++++
 .../framework/ui/LabelManagementPage.svelte   |  90 +++++++++++++
 .../lib/label/framework/ui/PostLabel.svelte   |   2 +-
 .../adapter/gateway/postInfoResponseDto.ts    |   8 +-
 .../post/adapter/gateway/postResponseDto.ts   |   8 +-
 .../adapter/presenter/postCreatedStore.ts     |   9 +-
 .../post/framework/ui/CreatePostDialog.svelte |  18 +--
 .../framework/ui/PostManagementPage.svelte    |  20 ++-
 .../routes/dashboard/label/+page.server.ts    |  13 ++
 .../src/routes/dashboard/label/+page.svelte   |  22 ++-
 25 files changed, 593 insertions(+), 53 deletions(-)
 rename frontend/src/lib/label/adapter/gateway/{colorResponseDto.ts => colorDto.ts} (67%)
 create mode 100644 frontend/src/lib/label/adapter/gateway/createLabelRequestDto.ts
 create mode 100644 frontend/src/lib/label/adapter/gateway/labelApiService.ts
 create mode 100644 frontend/src/lib/label/adapter/gateway/labelRepositoryImpl.ts
 create mode 100644 frontend/src/lib/label/adapter/presenter/labelCreatedStore.ts
 create mode 100644 frontend/src/lib/label/adapter/presenter/labelsListedStore.ts
 create mode 100644 frontend/src/lib/label/application/gateway/labelRepository.ts
 create mode 100644 frontend/src/lib/label/application/useCase/createLabelUseCase.ts
 create mode 100644 frontend/src/lib/label/application/useCase/getAllLabelsUseCase.ts
 create mode 100644 frontend/src/lib/label/framework/api/labelApiServiceImpl.ts
 create mode 100644 frontend/src/lib/label/framework/ui/CreateLabelDialog.svelte
 create mode 100644 frontend/src/lib/label/framework/ui/LabelManagementPage.svelte
 create mode 100644 frontend/src/routes/dashboard/label/+page.server.ts

diff --git a/frontend/src/lib/auth/adapter/gateway/userResponseDto.ts b/frontend/src/lib/auth/adapter/gateway/userResponseDto.ts
index 8f64369..dff2c4e 100644
--- a/frontend/src/lib/auth/adapter/gateway/userResponseDto.ts
+++ b/frontend/src/lib/auth/adapter/gateway/userResponseDto.ts
@@ -1,7 +1,7 @@
 import { User } from '$lib/auth/domain/entity/user';
 import z from 'zod';
 
-export const UserResponseSchema = z.object({
+export const userResponseSchema = z.object({
 	id: z.int32(),
 	displayed_name: z.string(),
 	email: z.email(),
@@ -19,7 +19,7 @@ export class UserResponseDto {
 	}
 
 	static fromJson(json: unknown): UserResponseDto {
-		const parsedJson = UserResponseSchema.parse(json);
+		const parsedJson = userResponseSchema.parse(json);
 		return new UserResponseDto({
 			id: parsedJson.id,
 			displayedName: parsedJson.displayed_name,
diff --git a/frontend/src/lib/container.ts b/frontend/src/lib/container.ts
index cb9cc20..078015c 100644
--- a/frontend/src/lib/container.ts
+++ b/frontend/src/lib/container.ts
@@ -4,6 +4,15 @@ import { AuthLoadedStore } from '$lib/auth/adapter/presenter/authLoadedStore';
 import type { AuthRepository } from '$lib/auth/application/gateway/authRepository';
 import { GetCurrentUserUseCase } from '$lib/auth/application/useCase/getCurrentUserUseCase';
 import { AuthApiServiceImpl } from '$lib/auth/framework/api/authApiServiceImpl';
+import type { LabelApiService } from '$lib/label/adapter/gateway/labelApiService';
+import { LabelRepositoryImpl } from '$lib/label/adapter/gateway/labelRepositoryImpl';
+import { LabelCreatedStore } from '$lib/label/adapter/presenter/labelCreatedStore';
+import type { LabelViewModel } from '$lib/label/adapter/presenter/labelViewModel';
+import { LabelsListedStore } from '$lib/label/adapter/presenter/labelsListedStore';
+import type { LabelRepository } from '$lib/label/application/gateway/labelRepository';
+import { CreateLabelUseCase } from '$lib/label/application/useCase/createLabelUseCase';
+import { GetAllLabelsUseCase } from '$lib/label/application/useCase/getAllLabelsUseCase';
+import { LabelApiServiceImpl } from '$lib/label/framework/api/labelApiServiceImpl';
 import type { ImageApiService } from '$lib/image/adapter/gateway/imageApiService';
 import { ImageRepositoryImpl } from '$lib/image/adapter/gateway/imageRepositoryImpl';
 import { ImageUploadedStore } from '$lib/image/adapter/presenter/imageUploadedStore';
@@ -48,8 +57,16 @@ export class Container {
 		return new PostLoadedStore(this.useCases.getPostUseCase, initialData);
 	}
 
-	createPostCreatedStore(initialData?: PostViewModel): PostCreatedStore {
-		return new PostCreatedStore(this.useCases.createPostUseCase, initialData);
+	createPostCreatedStore(): PostCreatedStore {
+		return new PostCreatedStore(this.useCases.createPostUseCase);
+	}
+
+	createLabelsListedStore(initialData?: readonly LabelViewModel[]): LabelsListedStore {
+		return new LabelsListedStore(this.useCases.getAllLabelsUseCase, initialData);
+	}
+
+	createLabelCreatedStore(): LabelCreatedStore {
+		return new LabelCreatedStore(this.useCases.createLabelUseCase);
 	}
 }
 
@@ -59,6 +76,7 @@ class ApiServices {
 	private _authApiService?: AuthApiService;
 	private _imageApiService?: ImageApiService;
 	private _postApiService?: PostApiService;
+	private _labelApiService?: LabelApiService;
 
 	constructor(fetchFn: typeof fetch) {
 		this.fetchFn = fetchFn;
@@ -78,6 +96,11 @@ class ApiServices {
 		this._postApiService ??= new PostApiServiceImpl(this.fetchFn);
 		return this._postApiService;
 	}
+
+	get labelApiService(): LabelApiService {
+		this._labelApiService ??= new LabelApiServiceImpl(this.fetchFn);
+		return this._labelApiService;
+	}
 }
 
 class Repositories {
@@ -86,6 +109,7 @@ class Repositories {
 	private _authRepository?: AuthRepository;
 	private _imageRepository?: ImageRepository;
 	private _postRepository?: PostRepository;
+	private _labelRepository?: LabelRepository;
 
 	constructor(apiServices: ApiServices) {
 		this.apiServices = apiServices;
@@ -105,6 +129,11 @@ class Repositories {
 		this._postRepository ??= new PostRepositoryImpl(this.apiServices.postApiService);
 		return this._postRepository;
 	}
+
+	get labelRepository(): LabelRepository {
+		this._labelRepository ??= new LabelRepositoryImpl(this.apiServices.labelApiService);
+		return this._labelRepository;
+	}
 }
 
 class UseCases {
@@ -115,6 +144,8 @@ class UseCases {
 	private _getAllPostsUseCase?: GetAllPostsUseCase;
 	private _getPostUseCase?: GetPostUseCase;
 	private _createPostUseCase?: CreatePostUseCase;
+	private _getAllLabelsUseCase?: GetAllLabelsUseCase;
+	private _createLabelUseCase?: CreateLabelUseCase;
 
 	constructor(repositories: Repositories) {
 		this.repositories = repositories;
@@ -144,4 +175,14 @@ class UseCases {
 		this._createPostUseCase ??= new CreatePostUseCase(this.repositories.postRepository);
 		return this._createPostUseCase;
 	}
+
+	get getAllLabelsUseCase(): GetAllLabelsUseCase {
+		this._getAllLabelsUseCase ??= new GetAllLabelsUseCase(this.repositories.labelRepository);
+		return this._getAllLabelsUseCase;
+	}
+
+	get createLabelUseCase(): CreateLabelUseCase {
+		this._createLabelUseCase ??= new CreateLabelUseCase(this.repositories.labelRepository);
+		return this._createLabelUseCase;
+	}
 }
diff --git a/frontend/src/lib/image/adapter/gateway/imageInfoResponseDto.ts b/frontend/src/lib/image/adapter/gateway/imageInfoResponseDto.ts
index ad7a5ba..bdc8d23 100644
--- a/frontend/src/lib/image/adapter/gateway/imageInfoResponseDto.ts
+++ b/frontend/src/lib/image/adapter/gateway/imageInfoResponseDto.ts
@@ -1,6 +1,6 @@
 import z from 'zod';
 
-export const ImageInfoResponseSchema = z.object({
+export const imageInfoResponseSchema = z.object({
 	id: z.int32(),
 	mime_type: z.string(),
 });
@@ -15,7 +15,7 @@ export class ImageInfoResponseDto {
 	}
 
 	static fromJson(json: unknown): ImageInfoResponseDto {
-		const parsedJson = ImageInfoResponseSchema.parse(json);
+		const parsedJson = imageInfoResponseSchema.parse(json);
 		return new ImageInfoResponseDto({
 			id: parsedJson.id,
 			mimeType: parsedJson.mime_type,
diff --git a/frontend/src/lib/label/adapter/gateway/colorResponseDto.ts b/frontend/src/lib/label/adapter/gateway/colorDto.ts
similarity index 67%
rename from frontend/src/lib/label/adapter/gateway/colorResponseDto.ts
rename to frontend/src/lib/label/adapter/gateway/colorDto.ts
index 9d2f75f..7952cdd 100644
--- a/frontend/src/lib/label/adapter/gateway/colorResponseDto.ts
+++ b/frontend/src/lib/label/adapter/gateway/colorDto.ts
@@ -1,14 +1,14 @@
 import { Color } from '$lib/label/domain/entity/color';
 import z from 'zod';
 
-export const ColorResponseSchema = z.object({
+export const colorResponseSchema = z.object({
 	red: z.number().int().min(0).max(255),
 	green: z.number().int().min(0).max(255),
 	blue: z.number().int().min(0).max(255),
 	alpha: z.number().int().min(0).max(255),
 });
 
-export class ColorResponseDto {
+export class ColorDto {
 	readonly red: number;
 	readonly green: number;
 	readonly blue: number;
@@ -21,9 +21,13 @@ export class ColorResponseDto {
 		this.alpha = props.alpha;
 	}
 
-	static fromJson(json: unknown): ColorResponseDto {
-		const parsedJson = ColorResponseSchema.parse(json);
-		return new ColorResponseDto({
+	static fromEntity(color: Color): ColorDto {
+		return new ColorDto(color);
+	}
+
+	static fromJson(json: unknown): ColorDto {
+		const parsedJson = colorResponseSchema.parse(json);
+		return new ColorDto({
 			red: parsedJson.red,
 			green: parsedJson.green,
 			blue: parsedJson.blue,
@@ -39,4 +43,13 @@ export class ColorResponseDto {
 			alpha: this.alpha,
 		});
 	}
+
+	toJson() {
+		return {
+			red: this.red,
+			green: this.green,
+			blue: this.blue,
+			alpha: this.alpha,
+		};
+	}
 }
diff --git a/frontend/src/lib/label/adapter/gateway/createLabelRequestDto.ts b/frontend/src/lib/label/adapter/gateway/createLabelRequestDto.ts
new file mode 100644
index 0000000..cc40e8c
--- /dev/null
+++ b/frontend/src/lib/label/adapter/gateway/createLabelRequestDto.ts
@@ -0,0 +1,26 @@
+import { ColorDto } from '$lib/label/adapter/gateway/colorDto';
+import type { CreateLabelParams } from '$lib/label/application/gateway/labelRepository';
+
+export class CreateLabelRequestDto {
+	readonly name: string;
+	readonly color: ColorDto;
+
+	private constructor(props: { name: string; color: ColorDto }) {
+		this.name = props.name;
+		this.color = props.color;
+	}
+
+	static fromParams(params: CreateLabelParams): CreateLabelRequestDto {
+		return new CreateLabelRequestDto({
+			name: params.name,
+			color: ColorDto.fromEntity(params.color),
+		});
+	}
+
+	toJson() {
+		return {
+			name: this.name,
+			color: this.color.toJson(),
+		};
+	}
+}
diff --git a/frontend/src/lib/label/adapter/gateway/labelApiService.ts b/frontend/src/lib/label/adapter/gateway/labelApiService.ts
new file mode 100644
index 0000000..e17b297
--- /dev/null
+++ b/frontend/src/lib/label/adapter/gateway/labelApiService.ts
@@ -0,0 +1,7 @@
+import type { CreateLabelRequestDto } from '$lib/label/adapter/gateway/createLabelRequestDto';
+import type { LabelResponseDto } from '$lib/label/adapter/gateway/labelResponseDto';
+
+export interface LabelApiService {
+	getAllLabels(): Promise<LabelResponseDto[]>;
+	createLabel(payload: CreateLabelRequestDto): Promise<LabelResponseDto>;
+}
diff --git a/frontend/src/lib/label/adapter/gateway/labelRepositoryImpl.ts b/frontend/src/lib/label/adapter/gateway/labelRepositoryImpl.ts
new file mode 100644
index 0000000..8c8bc8d
--- /dev/null
+++ b/frontend/src/lib/label/adapter/gateway/labelRepositoryImpl.ts
@@ -0,0 +1,22 @@
+import { CreateLabelRequestDto } from '$lib/label/adapter/gateway/createLabelRequestDto';
+import type { LabelApiService } from '$lib/label/adapter/gateway/labelApiService';
+import type {
+	CreateLabelParams,
+	LabelRepository,
+} from '$lib/label/application/gateway/labelRepository';
+import type { Label } from '$lib/label/domain/entity/label';
+
+export class LabelRepositoryImpl implements LabelRepository {
+	constructor(private readonly labelApiService: LabelApiService) {}
+
+	async getAllLabels(): Promise<Label[]> {
+		const dtos = await this.labelApiService.getAllLabels();
+		return dtos.map((dto) => dto.toEntity());
+	}
+
+	async createLabel(params: CreateLabelParams): Promise<Label> {
+		const requestDto = CreateLabelRequestDto.fromParams(params);
+		const responseDto = await this.labelApiService.createLabel(requestDto);
+		return responseDto.toEntity();
+	}
+}
diff --git a/frontend/src/lib/label/adapter/gateway/labelResponseDto.ts b/frontend/src/lib/label/adapter/gateway/labelResponseDto.ts
index 81535c4..2292de5 100644
--- a/frontend/src/lib/label/adapter/gateway/labelResponseDto.ts
+++ b/frontend/src/lib/label/adapter/gateway/labelResponseDto.ts
@@ -1,30 +1,30 @@
-import { ColorResponseDto, ColorResponseSchema } from '$lib/label/adapter/gateway/colorResponseDto';
+import { ColorDto, colorResponseSchema } from '$lib/label/adapter/gateway/colorDto';
 import { Label } from '$lib/label/domain/entity/label';
 import { z } from 'zod';
 
-export const LabelResponseSchema = z.object({
+export const labelResponseSchema = z.object({
 	id: z.int32(),
 	name: z.string(),
-	color: ColorResponseSchema,
+	color: colorResponseSchema,
 });
 
 export class LabelResponseDto {
 	readonly id: number;
 	readonly name: string;
-	readonly color: ColorResponseDto;
+	readonly color: ColorDto;
 
-	private constructor(props: { id: number; name: string; color: ColorResponseDto }) {
+	private constructor(props: { id: number; name: string; color: ColorDto }) {
 		this.id = props.id;
 		this.name = props.name;
 		this.color = props.color;
 	}
 
 	static fromJson(json: unknown): LabelResponseDto {
-		const parsedJson = LabelResponseSchema.parse(json);
+		const parsedJson = labelResponseSchema.parse(json);
 		return new LabelResponseDto({
 			id: parsedJson.id,
 			name: parsedJson.name,
-			color: ColorResponseDto.fromJson(parsedJson.color),
+			color: ColorDto.fromJson(parsedJson.color),
 		});
 	}
 
diff --git a/frontend/src/lib/label/adapter/presenter/colorViewModel.ts b/frontend/src/lib/label/adapter/presenter/colorViewModel.ts
index 9687b9e..0dc2014 100644
--- a/frontend/src/lib/label/adapter/presenter/colorViewModel.ts
+++ b/frontend/src/lib/label/adapter/presenter/colorViewModel.ts
@@ -1,4 +1,4 @@
-import type { Color } from '$lib/label/domain/entity/color';
+import { Color } from '$lib/label/domain/entity/color';
 
 export class ColorViewModel {
 	readonly red: number;
@@ -56,6 +56,19 @@ export class ColorViewModel {
 		});
 	}
 
+	static fromHex(hex: string): ColorViewModel {
+		const result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})?$/i.exec(hex);
+		if (!result) {
+			throw new Error('Invalid hex color format');
+		}
+		return new ColorViewModel({
+			red: parseInt(result[1], 16),
+			green: parseInt(result[2], 16),
+			blue: parseInt(result[3], 16),
+			alpha: result[4] ? parseInt(result[4], 16) : 255,
+		});
+	}
+
 	static rehydrate(props: DehydratedColorProps): ColorViewModel {
 		return new ColorViewModel(props);
 	}
@@ -99,6 +112,15 @@ export class ColorViewModel {
 		return { h: h * 360, s: s, l: l };
 	}
 
+	toEntity(): Color {
+		return new Color({
+			red: this.red,
+			green: this.green,
+			blue: this.blue,
+			alpha: this.alpha,
+		});
+	}
+
 	lighten(amount: number): ColorViewModel {
 		const hsl = this.toHsl();
 		hsl.l += amount;
diff --git a/frontend/src/lib/label/adapter/presenter/labelCreatedStore.ts b/frontend/src/lib/label/adapter/presenter/labelCreatedStore.ts
new file mode 100644
index 0000000..92d40f4
--- /dev/null
+++ b/frontend/src/lib/label/adapter/presenter/labelCreatedStore.ts
@@ -0,0 +1,40 @@
+import { AsyncState } from '$lib/common/adapter/presenter/asyncState';
+import type { BaseStore } from '$lib/common/adapter/presenter/baseStore';
+import { LabelViewModel } from '$lib/label/adapter/presenter/labelViewModel';
+import type { CreateLabelParams } from '$lib/label/application/gateway/labelRepository';
+import type { CreateLabelUseCase } from '$lib/label/application/useCase/createLabelUseCase';
+import { captureException } from '@sentry/sveltekit';
+import { get, writable } from 'svelte/store';
+
+type LabelState = AsyncState<LabelViewModel>;
+
+export class LabelCreatedStore implements BaseStore<LabelState, CreateLabelParams> {
+	private readonly state = writable<LabelState>(AsyncState.idle<LabelViewModel>(null));
+
+	constructor(private readonly createLabelUseCase: CreateLabelUseCase) {}
+
+	get subscribe() {
+		return this.state.subscribe;
+	}
+
+	get trigger() {
+		return (params: CreateLabelParams) => this.createLabel(params);
+	}
+
+	private async createLabel(params: CreateLabelParams): Promise<LabelState> {
+		this.state.set(AsyncState.loading(get(this.state).data));
+
+		let result: LabelState;
+		try {
+			const label = await this.createLabelUseCase.execute(params);
+			const labelViewModel = LabelViewModel.fromEntity(label);
+			result = AsyncState.success(labelViewModel);
+		} catch (e) {
+			result = AsyncState.error(e, get(this.state).data);
+			captureException(e);
+		}
+
+		this.state.set(result);
+		return result;
+	}
+}
diff --git a/frontend/src/lib/label/adapter/presenter/labelsListedStore.ts b/frontend/src/lib/label/adapter/presenter/labelsListedStore.ts
new file mode 100644
index 0000000..ea33f46
--- /dev/null
+++ b/frontend/src/lib/label/adapter/presenter/labelsListedStore.ts
@@ -0,0 +1,46 @@
+import { AsyncState } from '$lib/common/adapter/presenter/asyncState';
+import type { BaseStore } from '$lib/common/adapter/presenter/baseStore';
+import { LabelViewModel } from '$lib/label/adapter/presenter/labelViewModel';
+import type { GetAllLabelsUseCase } from '$lib/label/application/useCase/getAllLabelsUseCase';
+import { captureException } from '@sentry/sveltekit';
+import { get, writable } from 'svelte/store';
+
+type LabelListState = AsyncState<readonly LabelViewModel[]>;
+
+export class LabelsListedStore implements BaseStore<LabelListState, void> {
+	private readonly state = writable<LabelListState>(AsyncState.idle([]));
+
+	constructor(
+		private readonly getAllLabelsUseCase: GetAllLabelsUseCase,
+		initialData?: readonly LabelViewModel[]
+	) {
+		if (initialData) {
+			this.state.set(AsyncState.idle(initialData));
+		}
+	}
+
+	get subscribe() {
+		return this.state.subscribe;
+	}
+
+	get trigger() {
+		return () => this.loadLabels();
+	}
+
+	private async loadLabels(): Promise<LabelListState> {
+		this.state.set(AsyncState.loading(get(this.state).data));
+
+		let result: LabelListState;
+		try {
+			const labels = await this.getAllLabelsUseCase.execute();
+			const labelViewModels = labels.map((label) => LabelViewModel.fromEntity(label));
+			result = AsyncState.success(labelViewModels);
+		} catch (e) {
+			result = AsyncState.error(e, get(this.state).data);
+			captureException(e);
+		}
+
+		this.state.set(result);
+		return result;
+	}
+}
diff --git a/frontend/src/lib/label/application/gateway/labelRepository.ts b/frontend/src/lib/label/application/gateway/labelRepository.ts
new file mode 100644
index 0000000..8a9b7b3
--- /dev/null
+++ b/frontend/src/lib/label/application/gateway/labelRepository.ts
@@ -0,0 +1,12 @@
+import type { Color } from '$lib/label/domain/entity/color';
+import type { Label } from '$lib/label/domain/entity/label';
+
+export interface LabelRepository {
+	getAllLabels(): Promise<Label[]>;
+	createLabel(params: CreateLabelParams): Promise<Label>;
+}
+
+export interface CreateLabelParams {
+	name: string;
+	color: Color;
+}
diff --git a/frontend/src/lib/label/application/useCase/createLabelUseCase.ts b/frontend/src/lib/label/application/useCase/createLabelUseCase.ts
new file mode 100644
index 0000000..adac13d
--- /dev/null
+++ b/frontend/src/lib/label/application/useCase/createLabelUseCase.ts
@@ -0,0 +1,13 @@
+import type {
+	CreateLabelParams,
+	LabelRepository,
+} from '$lib/label/application/gateway/labelRepository';
+import type { Label } from '$lib/label/domain/entity/label';
+
+export class CreateLabelUseCase {
+	constructor(private readonly labelRepository: LabelRepository) {}
+
+	async execute(params: CreateLabelParams): Promise<Label> {
+		return this.labelRepository.createLabel(params);
+	}
+}
diff --git a/frontend/src/lib/label/application/useCase/getAllLabelsUseCase.ts b/frontend/src/lib/label/application/useCase/getAllLabelsUseCase.ts
new file mode 100644
index 0000000..3dc4d61
--- /dev/null
+++ b/frontend/src/lib/label/application/useCase/getAllLabelsUseCase.ts
@@ -0,0 +1,10 @@
+import type { LabelRepository } from '$lib/label/application/gateway/labelRepository';
+import type { Label } from '$lib/label/domain/entity/label';
+
+export class GetAllLabelsUseCase {
+	constructor(private readonly labelRepository: LabelRepository) {}
+
+	execute(): Promise<Label[]> {
+		return this.labelRepository.getAllLabels();
+	}
+}
diff --git a/frontend/src/lib/label/framework/api/labelApiServiceImpl.ts b/frontend/src/lib/label/framework/api/labelApiServiceImpl.ts
new file mode 100644
index 0000000..d2041b0
--- /dev/null
+++ b/frontend/src/lib/label/framework/api/labelApiServiceImpl.ts
@@ -0,0 +1,39 @@
+import { HttpError } from '$lib/common/framework/web/httpError';
+import { Environment } from '$lib/environment';
+import type { CreateLabelRequestDto } from '$lib/label/adapter/gateway/createLabelRequestDto';
+import type { LabelApiService } from '$lib/label/adapter/gateway/labelApiService';
+import { LabelResponseDto } from '$lib/label/adapter/gateway/labelResponseDto';
+
+export class LabelApiServiceImpl implements LabelApiService {
+	constructor(private readonly fetchFn: typeof fetch) {}
+
+	async getAllLabels(): Promise<LabelResponseDto[]> {
+		const url = new URL('label', Environment.API_BASE_URL);
+
+		const response = await this.fetchFn(url);
+
+		if (!response.ok) {
+			throw new HttpError(response.status, url);
+		}
+
+		const data = await response.json();
+		return data.map(LabelResponseDto.fromJson);
+	}
+
+	async createLabel(payload: CreateLabelRequestDto): Promise<LabelResponseDto> {
+		const url = new URL('label', Environment.API_BASE_URL);
+
+		const response = await this.fetchFn(url, {
+			method: 'POST',
+			headers: { 'Content-Type': 'application/json' },
+			body: JSON.stringify(payload.toJson()),
+		});
+
+		if (!response.ok) {
+			throw new HttpError(response.status, url);
+		}
+
+		const data = await response.json();
+		return LabelResponseDto.fromJson(data);
+	}
+}
diff --git a/frontend/src/lib/label/framework/ui/CreateLabelDialog.svelte b/frontend/src/lib/label/framework/ui/CreateLabelDialog.svelte
new file mode 100644
index 0000000..735aaed
--- /dev/null
+++ b/frontend/src/lib/label/framework/ui/CreateLabelDialog.svelte
@@ -0,0 +1,127 @@
+<script module lang="ts">
+	import z from 'zod';
+
+	const formSchema = z.object({
+		name: z.string().trim().nonempty(),
+		color: z.string().regex(/^#?[a-f\d]{6}$/i),
+	});
+
+	type FormParams = z.infer<typeof formSchema>;
+	export type CreateLabelDialogFormParams = FormParams;
+</script>
+
+<script lang="ts">
+	import { Button, buttonVariants } from '$lib/common/framework/components/ui/button';
+	import { Dialog } from '$lib/common/framework/components/ui/dialog';
+	import DialogContent from '$lib/common/framework/components/ui/dialog/dialog-content.svelte';
+	import DialogFooter from '$lib/common/framework/components/ui/dialog/dialog-footer.svelte';
+	import DialogHeader from '$lib/common/framework/components/ui/dialog/dialog-header.svelte';
+	import DialogTitle from '$lib/common/framework/components/ui/dialog/dialog-title.svelte';
+	import DialogTrigger from '$lib/common/framework/components/ui/dialog/dialog-trigger.svelte';
+	import Input from '$lib/common/framework/components/ui/input/input.svelte';
+	import Label from '$lib/common/framework/components/ui/label/label.svelte';
+	import PostLabel from '$lib/label/framework/ui/PostLabel.svelte';
+	import { LabelViewModel } from '$lib/label/adapter/presenter/labelViewModel';
+	import { Label as LabelEntity } from '$lib/label/domain/entity/label';
+	import { ColorViewModel } from '$lib/label/adapter/presenter/colorViewModel';
+
+	const {
+		disabled,
+		onSubmit: createLabel,
+	}: {
+		disabled: boolean;
+		onSubmit: (params: FormParams) => Promise<boolean>;
+	} = $props();
+
+	let open = $state(false);
+
+	let formData = $state<FormParams>({
+		name: '',
+		color: '#dddddd',
+	});
+	let formErrors = $state<Partial<Record<keyof FormParams, string>>>({});
+
+	const previewLabel = $derived(
+		LabelViewModel.fromEntity(
+			new LabelEntity({
+				id: -1,
+				name: formData.name || 'Preview',
+				color: ColorViewModel.fromHex(formData.color).toEntity(),
+			})
+		)
+	);
+
+	async function onSubmit(event: SubmitEvent) {
+		event.preventDefault();
+		formErrors = {};
+
+		const parseResult = formSchema.safeParse(formData);
+		if (parseResult.error) {
+			const errorResult = z.treeifyError(parseResult.error).properties;
+			formErrors.name = errorResult?.name?.errors[0];
+			formErrors.color = errorResult?.color?.errors[0];
+			return;
+		}
+
+		const isSuccess = await createLabel(formData);
+		if (!isSuccess) {
+			return;
+		}
+
+		formData = {
+			name: '',
+			color: '#dddddd',
+		};
+		open = false;
+	}
+</script>
+
+<Dialog bind:open>
+	<DialogTrigger class={buttonVariants({ variant: 'default' })}>Create</DialogTrigger>
+	<DialogContent
+		showCloseButton={false}
+		onInteractOutside={(e) => e.preventDefault()}
+		onEscapeKeydown={(e) => e.preventDefault()}
+	>
+		<DialogHeader class="mb-4">
+			<DialogTitle>Create Label</DialogTitle>
+		</DialogHeader>
+
+		<form id="create-label-form" onsubmit={onSubmit} class="space-y-3">
+			<div>
+				<Label for="name-input" class="pb-2">Name</Label>
+				<Input
+					id="name-input"
+					type="text"
+					aria-invalid={formErrors.name !== undefined}
+					bind:value={formData.name}
+				/>
+				{#if formErrors.name}
+					<p class="text-sm text-red-500">{formErrors.name}</p>
+				{/if}
+			</div>
+
+			<div>
+				<Label for="color-input" class="pb-2">Color</Label>
+				<Input
+					id="color-input"
+					type="color"
+					class="w-16"
+					aria-invalid={formErrors.color !== undefined}
+					bind:value={formData.color}
+				/>
+				{#if formErrors.color}
+					<p class="text-sm text-red-500">{formErrors.color}</p>
+				{/if}
+			</div>
+		</form>
+
+		<DialogFooter class="mt-6 flex flex-row items-center">
+			<div class="me-auto">
+				<PostLabel label={previewLabel} />
+			</div>
+			<Button variant="outline" onclick={() => (open = false)} {disabled}>Cancel</Button>
+			<Button type="submit" form="create-label-form" {disabled}>Submit</Button>
+		</DialogFooter>
+	</DialogContent>
+</Dialog>
diff --git a/frontend/src/lib/label/framework/ui/LabelManagementPage.svelte b/frontend/src/lib/label/framework/ui/LabelManagementPage.svelte
new file mode 100644
index 0000000..4920a1a
--- /dev/null
+++ b/frontend/src/lib/label/framework/ui/LabelManagementPage.svelte
@@ -0,0 +1,90 @@
+<script lang="ts">
+	import TableBody from '$lib/common/framework/components/ui/table/table-body.svelte';
+	import TableCell from '$lib/common/framework/components/ui/table/table-cell.svelte';
+	import TableHead from '$lib/common/framework/components/ui/table/table-head.svelte';
+	import TableHeader from '$lib/common/framework/components/ui/table/table-header.svelte';
+	import TableRow from '$lib/common/framework/components/ui/table/table-row.svelte';
+	import Table from '$lib/common/framework/components/ui/table/table.svelte';
+	import { LabelCreatedStore } from '$lib/label/adapter/presenter/labelCreatedStore';
+	import { LabelsListedStore } from '$lib/label/adapter/presenter/labelsListedStore';
+	import CreateLabelDialog, {
+		type CreateLabelDialogFormParams,
+	} from '$lib/label/framework/ui/CreateLabelDialog.svelte';
+	import PostLabel from '$lib/label/framework/ui/PostLabel.svelte';
+	import { ColorViewModel } from '$lib/label/adapter/presenter/colorViewModel';
+	import { getContext, onMount } from 'svelte';
+	import { toast } from 'svelte-sonner';
+
+	const labelCreatedStore = getContext<LabelCreatedStore>(LabelCreatedStore.name);
+	const labelCreatedState = $derived($labelCreatedStore);
+	const { trigger: createLabel } = labelCreatedStore;
+
+	const labelsListedStore = getContext<LabelsListedStore>(LabelsListedStore.name);
+	const labelsListedState = $derived($labelsListedStore);
+	const { trigger: loadLabels } = labelsListedStore;
+
+	async function onCreateLabelDialogSubmit(params: CreateLabelDialogFormParams): Promise<boolean> {
+		const colorViewModel = ColorViewModel.fromHex(params.color);
+		const color = colorViewModel.toEntity();
+
+		const state = await createLabel({
+			name: params.name,
+			color: color,
+		});
+
+		if (state.isSuccess()) {
+			loadLabels();
+			toast.success(`Label created successfully with ID: ${state.data.id}`);
+		} else if (state.isError()) {
+			toast.error('Failed to create label', {
+				description: state.error.message,
+			});
+			return false;
+		}
+
+		return true;
+	}
+
+	onMount(() => loadLabels());
+</script>
+
+<div class="dashboard-container mb-10">
+	<div class="flex flex-row items-center justify-between">
+		<h1 class="py-16 text-5xl font-bold text-gray-800">Label</h1>
+		<CreateLabelDialog
+			disabled={labelCreatedState.isLoading()}
+			onSubmit={onCreateLabelDialogSubmit}
+		/>
+	</div>
+	<Table>
+		<TableHeader>
+			<TableRow>
+				<TableHead>ID</TableHead>
+				<TableHead>Name</TableHead>
+				<TableHead>Color</TableHead>
+				<TableHead>Preview</TableHead>
+			</TableRow>
+		</TableHeader>
+		<TableBody>
+			{#if labelsListedState.isSuccess()}
+				{#each labelsListedState.data as label (label.id)}
+					<TableRow>
+						<TableCell>{label.id}</TableCell>
+						<TableCell><span class="text-wrap">{label.name}</span></TableCell>
+						<TableCell>
+							<div class="flex items-center gap-2">
+								<div class="size-4 rounded-full" style="background-color: {label.color.hex};"></div>
+								<span class="font-mono text-sm">{label.color.hex}</span>
+							</div>
+						</TableCell>
+						<TableCell>
+							<div>
+								<PostLabel {label} />
+							</div>
+						</TableCell>
+					</TableRow>
+				{/each}
+			{/if}
+		</TableBody>
+	</Table>
+</div>
diff --git a/frontend/src/lib/label/framework/ui/PostLabel.svelte b/frontend/src/lib/label/framework/ui/PostLabel.svelte
index 662c7c3..f8fda33 100644
--- a/frontend/src/lib/label/framework/ui/PostLabel.svelte
+++ b/frontend/src/lib/label/framework/ui/PostLabel.svelte
@@ -5,7 +5,7 @@
 </script>
 
 <div
-	class="flex flex-row items-center gap-x-1 rounded-full px-2 py-0.5"
+	class="flex h-fit w-fit flex-row items-center gap-x-1 rounded-full px-2 py-0.5"
 	style="background-color: {label.color.hex};"
 >
 	<div class="size-2 rounded-full" style="background-color: {label.color.darken(0.2).hex};"></div>
diff --git a/frontend/src/lib/post/adapter/gateway/postInfoResponseDto.ts b/frontend/src/lib/post/adapter/gateway/postInfoResponseDto.ts
index c4ef593..6dbdd46 100644
--- a/frontend/src/lib/post/adapter/gateway/postInfoResponseDto.ts
+++ b/frontend/src/lib/post/adapter/gateway/postInfoResponseDto.ts
@@ -1,14 +1,14 @@
-import { LabelResponseDto, LabelResponseSchema } from '$lib/label/adapter/gateway/labelResponseDto';
+import { LabelResponseDto, labelResponseSchema } from '$lib/label/adapter/gateway/labelResponseDto';
 import { PostInfo } from '$lib/post/domain/entity/postInfo';
 import z from 'zod';
 
-export const PostInfoResponseSchema = z.object({
+export const postInfoResponseSchema = z.object({
 	id: z.int32(),
 	semantic_id: z.string(),
 	title: z.string(),
 	description: z.string(),
 	preview_image_url: z.url().nullable(),
-	labels: z.array(LabelResponseSchema),
+	labels: z.array(labelResponseSchema),
 	published_time: z.iso.datetime({ offset: true }).nullable(),
 });
 
@@ -40,7 +40,7 @@ export class PostInfoResponseDto {
 	}
 
 	static fromJson(json: unknown): PostInfoResponseDto {
-		const parsedJson = PostInfoResponseSchema.parse(json);
+		const parsedJson = postInfoResponseSchema.parse(json);
 
 		let published_time: Date | null = null;
 		if (parsedJson.published_time !== null) {
diff --git a/frontend/src/lib/post/adapter/gateway/postResponseDto.ts b/frontend/src/lib/post/adapter/gateway/postResponseDto.ts
index c68719d..e71a404 100644
--- a/frontend/src/lib/post/adapter/gateway/postResponseDto.ts
+++ b/frontend/src/lib/post/adapter/gateway/postResponseDto.ts
@@ -1,13 +1,13 @@
 import {
 	PostInfoResponseDto,
-	PostInfoResponseSchema,
+	postInfoResponseSchema,
 } from '$lib/post/adapter/gateway/postInfoResponseDto';
 import { Post } from '$lib/post/domain/entity/post';
 import z from 'zod';
 
-export const PostResponseSchema = z.object({
+export const postResponseSchema = z.object({
 	id: z.int32(),
-	info: PostInfoResponseSchema,
+	info: postInfoResponseSchema,
 	content: z.string(),
 });
 
@@ -23,7 +23,7 @@ export class PostResponseDto {
 	}
 
 	static fromJson(json: unknown): PostResponseDto {
-		const parsedJson = PostResponseSchema.parse(json);
+		const parsedJson = postResponseSchema.parse(json);
 		return new PostResponseDto({
 			id: parsedJson.id,
 			info: PostInfoResponseDto.fromJson(parsedJson.info),
diff --git a/frontend/src/lib/post/adapter/presenter/postCreatedStore.ts b/frontend/src/lib/post/adapter/presenter/postCreatedStore.ts
index 4ea7835..6baea2d 100644
--- a/frontend/src/lib/post/adapter/presenter/postCreatedStore.ts
+++ b/frontend/src/lib/post/adapter/presenter/postCreatedStore.ts
@@ -11,14 +11,7 @@ type PostState = AsyncState<PostViewModel>;
 export class PostCreatedStore implements BaseStore<PostState, CreatePostParams> {
 	private readonly state = writable<PostState>(AsyncState.idle<PostViewModel>(null));
 
-	constructor(
-		private readonly createPostUseCase: CreatePostUseCase,
-		initialData?: PostViewModel
-	) {
-		if (initialData) {
-			this.state.set(AsyncState.idle(initialData));
-		}
-	}
+	constructor(private readonly createPostUseCase: CreatePostUseCase) {}
 
 	get subscribe() {
 		return this.state.subscribe;
diff --git a/frontend/src/lib/post/framework/ui/CreatePostDialog.svelte b/frontend/src/lib/post/framework/ui/CreatePostDialog.svelte
index 7197cf3..f51a845 100644
--- a/frontend/src/lib/post/framework/ui/CreatePostDialog.svelte
+++ b/frontend/src/lib/post/framework/ui/CreatePostDialog.svelte
@@ -7,7 +7,7 @@
 			.max(100)
 			.regex(/\D/)
 			.regex(/^[a-zA-Z0-9_-]+$/),
-		title: z.string().trim().nonempty().max(100),
+		title: z.string().trim().nonempty(),
 	});
 
 	type FormParams = z.infer<typeof formSchema>;
@@ -30,7 +30,7 @@
 		onSubmit: createPost,
 	}: {
 		disabled: boolean;
-		onSubmit: (params: FormParams) => Promise<void>;
+		onSubmit: (params: FormParams) => Promise<boolean>;
 	} = $props();
 
 	let open = $state(false);
@@ -45,16 +45,16 @@
 		const parseResult = formSchema.safeParse(formData);
 		if (parseResult.error) {
 			const errorResult = z.treeifyError(parseResult.error).properties;
-			if (errorResult?.semanticId?.errors) {
-				formErrors.semanticId = errorResult.semanticId.errors[0];
-			}
-			if (errorResult?.title?.errors) {
-				formErrors.title = errorResult.title.errors[0];
-			}
+			formErrors.semanticId = errorResult?.semanticId?.errors[0];
+			formErrors.title = errorResult?.title?.errors[0];
+			return;
+		}
+
+		const isSuccess = await createPost(formData);
+		if (!isSuccess) {
 			return;
 		}
 
-		await createPost(formData);
 		formData = { semanticId: '', title: '' };
 		open = false;
 	}
diff --git a/frontend/src/lib/post/framework/ui/PostManagementPage.svelte b/frontend/src/lib/post/framework/ui/PostManagementPage.svelte
index 01ac636..d1a0c3b 100644
--- a/frontend/src/lib/post/framework/ui/PostManagementPage.svelte
+++ b/frontend/src/lib/post/framework/ui/PostManagementPage.svelte
@@ -22,16 +22,20 @@
 	const postsListedState = $derived($postsListedStore);
 	const { trigger: loadPosts } = postsListedStore;
 
-	async function onCreatePostDialogSubmit(params: CreatePostDialogFormParams) {
+	async function onCreatePostDialogSubmit(params: CreatePostDialogFormParams): Promise<boolean> {
 		const state = await createPost(params);
 
 		if (state.isSuccess()) {
+			loadPosts({ showUnpublished: true });
 			toast.success(`Post created successfully with ID: ${state.data.id}`);
 		} else if (state.isError()) {
 			toast.error('Failed to create post', {
 				description: state.error.message,
 			});
+			return false;
 		}
+
+		return true;
 	}
 
 	onMount(() => loadPosts({ showUnpublished: true }));
@@ -56,13 +60,15 @@
 				{#each postsListedState.data as postInfo (postInfo.id)}
 					<TableRow>
 						<TableCell>{postInfo.id}</TableCell>
-						<TableCell>{postInfo.title}</TableCell>
-						<TableCell class="flex flex-row flex-wrap gap-2">
-							{#each postInfo.labels as label (label.id)}
-								<PostLabel {label} />
-							{/each}
+						<TableCell><span class="text-wrap">{postInfo.title}</span></TableCell>
+						<TableCell>
+							<div class="flex flex-row flex-wrap gap-2">
+								{#each postInfo.labels as label (label.id)}
+									<PostLabel {label} />
+								{/each}
+							</div>
 						</TableCell>
-						<TableCell>{postInfo.formattedPublishedTime || '---'}</TableCell>
+						<TableCell>{postInfo.formattedPublishedTime}</TableCell>
 					</TableRow>
 				{/each}
 			{/if}
diff --git a/frontend/src/routes/dashboard/label/+page.server.ts b/frontend/src/routes/dashboard/label/+page.server.ts
new file mode 100644
index 0000000..6d5bf1f
--- /dev/null
+++ b/frontend/src/routes/dashboard/label/+page.server.ts
@@ -0,0 +1,13 @@
+import type { PageServerLoad } from './$types';
+
+export const load: PageServerLoad = async ({ locals }) => {
+	const { container } = locals;
+	const store = container.createLabelsListedStore();
+	const { trigger: loadLabels } = store;
+
+	const state = await loadLabels();
+
+	return {
+		dehydratedData: state.data?.map((label) => label.dehydrate()),
+	};
+};
diff --git a/frontend/src/routes/dashboard/label/+page.svelte b/frontend/src/routes/dashboard/label/+page.svelte
index b711e4a..87a5c0e 100644
--- a/frontend/src/routes/dashboard/label/+page.svelte
+++ b/frontend/src/routes/dashboard/label/+page.svelte
@@ -1 +1,21 @@
-<div>Label</div>
+<script lang="ts">
+	import { Container } from '$lib/container';
+	import { LabelCreatedStore } from '$lib/label/adapter/presenter/labelCreatedStore';
+	import { LabelsListedStore } from '$lib/label/adapter/presenter/labelsListedStore';
+	import LabelManagementPage from '$lib/label/framework/ui/LabelManagementPage.svelte';
+	import { getContext, setContext } from 'svelte';
+	import type { PageProps } from './$types';
+	import { LabelViewModel } from '$lib/label/adapter/presenter/labelViewModel';
+
+	const { data }: PageProps = $props();
+	const container = getContext<Container>(Container.name);
+
+	const labelCreatedStore = container.createLabelCreatedStore();
+	setContext(LabelCreatedStore.name, labelCreatedStore);
+
+	const initialData = data.dehydratedData?.map((label) => LabelViewModel.rehydrate(label));
+	const labelsListedStore = container.createLabelsListedStore(initialData);
+	setContext(LabelsListedStore.name, labelsListedStore);
+</script>
+
+<LabelManagementPage />