chore: migrate CI from GitHub Actions to Gitea Actions

Replace GitHub Actions workflow with Gitea Actions, and switch
container registry from GHCR to Docker Hub.

.dockerignore

@@ -1,4 +1,6 @@
 delta-force-guide-server.iml
 build/
+!.gitlab-ci.yml
+!build/libs/*.jar
 .idea/
 .gradle

.gitea/workflows/build-and-deploy.yml

@@ -0,0 +1,72 @@
+name: Build and Deploy
+
+on:
+  release:
+    types: [published]
+
+env:
+  APP_NAME: delta-force-guide-server
+
+jobs:
+  build-and-release:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up JDK 21 (Corretto)
+        uses: actions/setup-java@v4
+        with:
+          java-version: 21
+          distribution: corretto
+          cache: gradle
+
+      - name: Build with Gradle
+        run: >
+          ./gradlew bootJar -x test
+          -PartefactVersion="${{ gitea.event.release.tag_name }}"
+          -PbuildChannel=stable
+
+      - name: Resolve JAR file path
+        id: jar
+        run: |
+          JAR_PATH=$(find build/libs -name '*.jar' | head -1)
+          echo "file=$JAR_PATH" >> "$GITHUB_OUTPUT"
+
+      - name: Upload JAR to Gitea Release
+        run: |
+          TAG="${{ gitea.event.release.tag_name }}"
+          FILE="${{ steps.jar.outputs.file }}"
+          ASSET_NAME="${APP_NAME}-${TAG}.jar"
+          curl -X POST \
+            -H "Authorization: token ${{ secrets.GITEA_TOKEN }}" \
+            -H "Content-Type: multipart/form-data" \
+            -F "attachment=@${FILE};filename=${ASSET_NAME}" \
+            "${{ gitea.server_url }}/api/v1/repos/${{ gitea.repository }}/releases/${{ gitea.event.release.id }}/assets?name=${ASSET_NAME}"
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKER_HUB_USERNAME }}
+          password: ${{ secrets.DOCKER_HUB_TOKEN }}
+
+      - name: Generate image tags
+        id: meta
+        run: |
+          DOCKERHUB_USER="${{ secrets.DOCKER_HUB_USERNAME }}"
+          REPO_NAME=$(echo "${{ gitea.repository.name }}" | tr '[:upper:]' '[:lower:]')
+          echo "tag_version=${DOCKERHUB_USER}/${REPO_NAME}:${{ gitea.event.release.tag_name }}" >> "$GITHUB_OUTPUT"
+          echo "tag_latest=${DOCKERHUB_USER}/${REPO_NAME}:latest" >> "$GITHUB_OUTPUT"
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: Dockerfile.ci
+          build-args: JAR_FILE=${{ steps.jar.outputs.file }}
+          push: true
+          tags: |
+            ${{ steps.meta.outputs.tag_version }}
+            ${{ steps.meta.outputs.tag_latest }}

.gitignore

@@ -143,8 +143,20 @@ test/
 gradle-app.setting
 .gradletasknamecache
 
+### Claude Code
+.claude/settings.local.json
+.claude/memory/
+.claude/plans/
+.claude/worktrees/
+.claude/scheduled_tasks.json
+
 # Eclipse Gradle plugin generated files
 # Eclipse Core
 .project
 # JDT-specific (Eclipse Java Development Tools)
 .classpath
+
+gradle.properties
+
+# frp config
+frpc.toml

.gitlab-ci.yml

@@ -0,0 +1,34 @@
+variables:
+  GRADLE_OPTS: -Dorg.gradle.daemon=false
+  DOCKER_HOST: unix:///var/run/docker.sock
+
+stages:
+  - release
+
+release:
+  stage: release
+  image: amazoncorretto:21-alpine
+  cache:
+    key: gradle
+    paths:
+      - .gradle/wrapper
+      - .gradle/caches
+  before_script:
+    - chmod +x gradlew
+    - apk add --no-cache docker-cli
+  script:
+    - ./gradlew bootJar -x test -PartefactVersion="$CI_COMMIT_TAG"
+    - JAR_FILE=$(find build/libs -name '*.jar' | head -1)
+    - echo "Building Docker image for tag $CI_COMMIT_TAG with JAR $JAR_FILE"
+    - docker build
+        -f Dockerfile.ci
+        --build-arg JAR_FILE="$JAR_FILE"
+        -t "$CI_REGISTRY_IMAGE:$CI_COMMIT_TAG"
+        .
+    - docker tag "$CI_REGISTRY_IMAGE:$CI_COMMIT_TAG" "$CI_REGISTRY_IMAGE:latest"
+    - echo "Pushing image $CI_REGISTRY_IMAGE:$CI_COMMIT_TAG"
+    - docker login "$CI_REGISTRY" -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD"
+    - docker push "$CI_REGISTRY_IMAGE:$CI_COMMIT_TAG"
+    - docker push "$CI_REGISTRY_IMAGE:latest"
+  rules:
+    - if: $CI_COMMIT_TAG

CLAUDE.md

@@ -0,0 +1,109 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Coding Standards
+
+- **Style**: Follow the Google Java Coding Style as the foundation.
+- **Indentation**: Use 4 spaces — no tabs.
+- **Line length**: Maximum 100 characters per line.
+- **Comments**: All code comments must use British English spelling (e.g. "colour" not "color", "behaviour" not "behavior", "serialise" not "serialize", "analyse" not "analyze", "traveller" not "traveler").
+
+## Build & Test Commands
+
+```bash
+# Build the project (skip tests)
+./gradlew build -x test
+
+# Run all tests
+./gradlew test
+
+# Run a single test class
+./gradlew test --tests "com.onixbyte.deltaforceguide.service.PasswordEncoderTest"
+
+# Run a specific test method
+./gradlew test --tests "com.onixbyte.deltaforceguide.service.PasswordEncoderTest.generatePassword"
+
+# Build the full JAR
+./gradlew bootJar
+```
+
+The project uses Gradle with Java 21 (Amazon Corretto). Tests use JUnit 5 with the Spring Boot test framework, H2 in-memory database for test runtime, and Spring Security test support. Tests require an active `dev` profile.
+
+## Code Architecture
+
+**Delta Force Guide Server** — A REST API backend for managing Delta Force game firearm builds/modifications.
+
+### Package structure
+
+```
+com.onixbyte.deltaforceguide
+├── client/           # External service clients (TokenClient for JWT)
+├── config/           # Spring beans: Security, CORS, Cache/Redis, Jackson, MyBatis, Spring Data
+├── controller/       # REST controllers (Firearm, Modification, Tag, Auth)
+├── domain/
+│   ├── converter/    # JPA attribute converters (FirearmTypeConverter)
+│   ├── dto/          # Request/response records (FirearmRequest, ModificationResponse, etc.)
+│   └── entity/       # JPA entities (Firearm, Modification, User, Accessory, Tuning)
+├── enumeration/      # Enums (FirearmType)
+├── exeption/         # BizException (custom runtime exception with HTTP status)
+├── filter/           # TokenAuthenticationFilter (JWT auth via OncePerRequestFilter)
+├── manager/          # Thin @Transactional wrappers around repositories
+├── mapper/           # MyBatis mappers (configured but currently unused)
+├── properties/       # @ConfigurationProperties records (Cors, Token, Cookie)
+├── repository/       # Spring Data JPA repositories
+├── security/
+│   ├── authentication/  # Custom UsernamePasswordAuthentication impl
+│   └── provider/        # UsernamePasswordAuthenticationProvider
+├── service/          # Business logic layer (FirearmService, ModificationService, AuthService, etc.)
+├── shared/           # Constants and utility classes (CookieName, CredentialProvider, JacksonModules)
+└── utils/            # Helpers (DateTimeUtil)
+```
+
+### Key design decisions
+
+- **JPA + native queries**: Most CRUD uses Spring Data JPA. Native queries (in `ModificationRepository`) handle JSONB tag filtering with Postgres `@>` operator.
+- **Custom auth flow**: JWT tokens in httpOnly cookies (`AccessToken`). Spring Security with a custom `UsernamePasswordAuthenticationProvider` and `TokenAuthenticationFilter`. Tokens are auto-renewed within 5 min of expiry.
+- **JSONB storage**: `Modification.tags` and `Modification.accessories` (including nested `Tuning` objects) are stored as JSONB columns using Hypersistence Utils `JsonType`.
+- **Strict layering**: The call chain must follow `Controller → Service → Manager → Repository/Mapper`. Skipping layers (e.g. Controller calling Manager directly, Service calling Repository directly) is not permitted. Each layer has a distinct responsibility: Controller handles HTTP concerns, Service contains business logic, Manager manages `@Transactional` boundaries and data access coordination, Repository/Mapper handles raw data access.
+- **DTOs as Java records**: All request/response objects are immutable records with static `from()` factory methods for entity→DTO conversion.
+- **Flyway migrations**: SQL migrations in `src/main/resources/db/migration/` — V2 (init), V3 (bullet/damage fields), V4 (user), V5 (accessories JSONB column).
+
+### Data model
+
+- `firearm` table: id, name, type (int→FirearmType enum), level, calibre, fire_rate, armour_damage, body_damage, review
+- `modification` table: id, firearm_id (FK→firearm), name, code, tags (jsonb), accessories (jsonb), note, author, video_url
+- `app_user` table: id, username, email
+- `user_credential` table: user_id, provider, credential (hashed)
+
+### API endpoints
+
+| Path                          | Methods          | Auth                                 |
+|-------------------------------|------------------|--------------------------------------|
+| `/firearms`                   | GET, POST        | GET public, POST requires auth       |
+| `/firearms/{id}`              | GET, PUT, DELETE | GET public, PUT/DELETE requires auth |
+| `/modifications`              | GET, POST        | GET public, POST requires auth       |
+| `/modifications/{id}`         | GET, PUT, DELETE | GET public, PUT/DELETE requires auth |
+| `/modifications/batch`        | POST             | Requires auth                        |
+| `/modifications/batch-delete` | DELETE           | Requires auth                        |
+| `/tags`                       | GET              | Public                               |
+| `/auth/login`                 | POST             | Public                               |
+| `/auth/logout`                | POST             | Authenticated                        |
+
+### Commit convention
+
+Conventional commits: `feat:`, `chore:`, `fix:`. Messages are in English, present tense imperative style.
+
+### External dependencies
+
+- **DB**: PostgreSQL (via Flyway migrations), H2 in test
+- **Cache**: Redis (via Spring Cache + RedisTemplate with GenericJackson2JsonRedisSerializer)
+- **Auth**: java-jwt (auth0), BCrypt
+- **Docs**: springdoc-openapi (Swagger UI) on dev profile
+- **Onixbyte internal libs**: version-catalogue, tuple, common-toolbox, math-toolbox, identity-generator, captcha, regions
+- **AWS**: S3 SDK
+
+### Profiles
+
+- `dev`: Enables Swagger UI, connects to dev DB/Redis at `dfguide.onixbyte.cn`. Config in `config/application-dev.yaml`.
+- Default profile: Used for production, no Swagger, connects to production datasource.

Dockerfile.ci

@@ -0,0 +1,7 @@
+FROM amazoncorretto:21-alpine
+WORKDIR /app
+
+ARG JAR_FILE
+COPY ${JAR_FILE} app.jar
+
+ENTRYPOINT ["java", "-jar", "app.jar"]

LICENCE

@@ -0,0 +1,21 @@
+MIT Licence
+
+Copyright (c) 2026 OnixByte
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -0,0 +1,150 @@
+# Delta Force Guide Server
+
+REST API backend for managing **Delta Force** game firearm builds and modifications. Provides endpoints to browse, create, and share weapon configurations including attachments, tuning setups, tags, and build reviews.
+
+
+## Tech Stack
+
+| Layer     | Technology                                                 |
+|-----------|------------------------------------------------------------|
+| Language  | Java 21 (Amazon Corretto)                                  |
+| Framework | Spring Boot 3.x (Web, Security, Data JPA, Cache, Actuator) |
+| Build     | Gradle (Kotlin DSL)                                        |
+| Database  | PostgreSQL (Flyway migrations, JSONB columns)              |
+| Cache     | Redis (2-hour TTL)                                         |
+| Auth      | Custom JWT via httpOnly cookies + BCrypt                   |
+| API Docs  | springdoc-openapi (Swagger UI, dev profile only)           |
+| Container | Multi-stage Docker image (Amazon Corretto 21 → Alpine)     |
+| CI/CD     | GitHub Actions — builds on release publish                 |
+
+
+## Quick Start
+
+### Prerequisites
+
+- JDK 21 (Amazon Corretto recommended)
+- PostgreSQL
+- Redis
+
+### Configure
+
+Copy and customise the development config:
+
+```bash
+cp config/application-prod.yaml.example \
+   config/application-dev.yaml
+```
+
+Fill in your datasource and Redis connection details, then place the production config at `config/`, then enable it by environment variable `SPRING_PROFILES_ACTIVE`.
+
+### Build
+
+```bash
+# Compile (skip tests)
+./gradlew build -x test
+
+# Run all tests
+./gradlew test
+
+# Build executable JAR
+./gradlew bootJar
+```
+
+### Run
+
+```bash
+SPRING_PROFILES_ACTIVE=prod java -jar build/libs/delta-force-guide-server-$version.jar
+```
+
+Swagger UI is available at `http://localhost:8080/swagger-ui.html` when the `dev` profile is active.
+
+## Data Model
+
+- **Firearm** — weapon base stats (name, type, level, calibre, fire rate, armour/body damage, review)
+- **Modification** — a build attached to a firearm, with name, code, tags (JSONB), accessories including nested tuning objects (JSONB), author notes, and video links
+- **App User** — registered user (username, email) with hashed credentials via BCrypt
+
+Tags and accessories are stored as PostgreSQL JSONB columns using [Hypersistence Utils](https://github.com/vladmihalcea/hypersistence-utils), enabling flexible per-build metadata and filtering with the `@>` operator.
+
+
+## Architecture
+
+```
+Controller  →  Service  →  Manager  →  Repository / Mapper
+   (HTTP)      (logic)     (@Transactional)  (data access)
+```
+
+The call chain is strictly enforced — skipping layers is not permitted. All request/response objects are Java records with static `from()` factory methods for entity-to-DTO conversion.
+
+
+## Docker
+
+```bash
+# Build image
+docker pull registry.onixbyte.cn/onixbyte/delta-force-guide-server:latest
+
+# Run container
+docker run -p 8080:8080 \
+  -v /path/to/config:/app/config \
+  -e SPRING_PROFILES_ACTIVE=$your_active_profiles
+  delta-force-guide-server
+```
+
+Pre-built images are published to **Self-hosted GitLab Container Registry** (`registry.onixbyte.cn/onixbyte/delta-force-guide-server`) on every release.
+
+
+## CI/CD
+
+GitLab CI triggers on **tags**. The pipeline:
+
+1. Builds the boot JAR with the release tag as the version
+2. Uploads the JAR as a release asset
+3. Builds and pushes a multi-arch Docker image to GHCR tagged with both `:latest` and `:<version>`
+
+No tests are run in CI by design — tests are expected to pass locally before a release is cut.
+
+
+## Profiles
+
+| Profile | Purpose                                                               |
+|---------|-----------------------------------------------------------------------|
+| `dev`   | Enables Swagger UI, connects to dev DB/Redis at `dfguide.onixbyte.cn` |
+| default | Production mode, no Swagger, uses production datasource               |
+
+
+## Project Structure
+
+```
+src/main/java/com/onixbyte/deltaforceguide/
+├── client/          External service HTTP clients
+├── config/          Spring bean definitions (Security, CORS, Cache, Jackson, MyBatis)
+├── controller/      REST controllers
+├── domain/
+│   ├── converter/   JPA attribute converters
+│   ├── dto/         Request/response records
+│   └── entity/      JPA entities
+├── enumeration/     Enums (FirearmType)
+├── exception/       Custom BizException with HTTP status mapping
+├── filter/          TokenAuthenticationFilter (JWT through OncePerRequestFilter)
+├── manager/         @Transactional wrappers around repositories
+├── mapper/          MyBatis mapper interfaces (reserved for future use)
+├── properties/      @ConfigurationProperties records
+├── repository/      Spring Data JPA repositories
+├── security/
+│   ├── authentication/  Custom UsernamePasswordAuthentication
+│   └── provider/        UsernamePasswordAuthenticationProvider
+├── service/         Business logic
+├── shared/          Constants and utility classes
+└── utils/           General-purpose helpers
+```
+
+
+## Versioning
+
+The application exposes its version at `/versions` (GET).
+
+
+## Licence
+
+This project is licensed under the [MIT Licence](LICENCE). Copyright &copy; 2026 OnixByte.
+

build.gradle.kts

@@ -5,6 +5,8 @@ plugins {
 }
 
 val artefactVersion: String by project
+val buildChannel: String by project
+val vendor: String by project
 
 group = "com.onixbyte.helix"
 version = artefactVersion
@@ -36,6 +38,7 @@ dependencies {
     implementation(libs.onixbyte.identityGenerator)
     implementation(libs.onixbyte.captcha)
     implementation(libs.onixbyte.regions)
+    implementation(libs.onixbyte.cryptoToolbox)
     implementation(libs.jwt.core)
     implementation(libs.spring.boot.configurationProcessor)
     implementation(libs.spring.boot.actuator)
@@ -49,15 +52,27 @@ dependencies {
     implementation(libs.flyway.core)
     implementation(libs.flyway.postgresql)
     implementation(libs.jackson.jsr310)
-    implementation("org.springdoc:springdoc-openapi-starter-webmvc-ui:2.8.16")
+    implementation(libs.spring.boot.starter.doc)
+    implementation(libs.spring.boot.starter.security)
     testImplementation(libs.spring.boot.starter.test)
     testImplementation(libs.reactor.test)
     testImplementation(libs.mybatis.starter.test)
+    testImplementation(libs.spring.security.test)
     runtimeOnly(libs.postgres.driver)
     testRuntimeOnly(libs.h2.database)
     testRuntimeOnly(libs.junit.launcher)
 }
 
+tasks.processResources {
+    filesMatching("application.yaml") {
+        expand(
+            "appVersion" to artefactVersion,
+            "channel" to buildChannel,
+            "vendor" to vendor
+        )
+    }
+}
+
 tasks.test {
     useJUnitPlatform()
 }

config/application-prod.yaml.example

@@ -0,0 +1,55 @@
+spring:
+  datasource:
+    url: jdbc:postgresql://localhost:5432/dfguide_dev
+    username: postgres
+    password: 123456
+    driver-class-name: org.postgresql.Driver
+  data:
+    redis:
+      host: localhost
+      port: 6379
+      database: 0
+      # password: 6hLFVqfGPviTYukn # Uncomment if password is necessary
+
+logging:
+  pattern:
+    # dateformat: dd MMM yyyy HH:mm:ss.SSS # Modify this for custom date format.
+
+app:
+  common:
+    version: 1.3.0.8-dev # Application version, you can change to any version you like, used for communication with frontend.
+  cors:
+    allowed-origins: # Cross-origin allowed origins
+      - "http://localhost:5173" # Dev server for vite.
+      - "http://localhost:4173" # Preview server for vite.
+    allow-credentials: true # Must be set to `true` since we are using cookie. You can change it only when you have modified how this application executing authentication.
+    allow-private-network: false
+    allowed-headers:
+      - "Content-Type"
+      - "Authorization"
+    allowed-methods:
+      - GET
+      - POST
+      - PUT
+      - PATCH
+      - DELETE
+    exposed-headers:
+      - "Content-Type"
+      - "Authorization"
+    max-age: PT2H
+  jwt:
+    issuer: dfguide.local # Issuer host
+    secret: qwertyuiopasdfghjklzxcvbnm123456 # JWT singing secret, a 32-byte long or longer string is recommended
+    valid-time: PT2H # JWT valid duration
+  cookie: # Cookie settings.
+    http-only: true
+    secure: false
+    same-site: lax
+    path: '/'
+    max-age: PT2H
+
+springdoc:
+  api-docs:
+    enabled: true # Set to `false` if you do not need api docs (recommended in production mode).
+  swagger-ui:
+    enabled: true # Set to `false` if you do not need swagger ui (recommended in production mode).

gradle.properties

@@ -1 +0,0 @@
-artefactVersion = 1.0.0

gradle/libs.versions.toml

@@ -4,10 +4,9 @@ javaJwtVersion = "4.5.1"
 postgresDriverVersion = "42.7.9"
 h2Version = "2.2.224"
 springBootVersion = "3.5.13"
-springSecurityVersion = "6.5.2"
 reactorVersion = "3.7.8"
 junitPlatformVersion = "1.12.2"
-onixbyteVersion = "3.3.0"
+onixbyteVersion = "3.4.0"
 onixbyteCaptcha = "1.1.0"
 onixbyteRegions = "2025.12.0"
 awsSdkVersion = "2.25.48"
@@ -18,6 +17,7 @@ mybatisVersion = "3.0.5"
 jacksonVersion = "2.19.2"
 hypersistenceVersion = "3.14.0"
 springDependencyManagementVersion = "1.1.7"
+springDocVersion = "2.8.16"
 
 [libraries]
 # General Utilities
@@ -31,6 +31,7 @@ jackson-jsr310 = { group = "com.fasterxml.jackson.datatype", name = "jackson-dat
 onixbyte-versionCatalogue = { group = "com.onixbyte", name = "version-catalogue", version.ref = "onixbyteVersion" }
 onixbyte-tuple = { group = "com.onixbyte", name = "tuple" }
 onixbyte-commonToolbox = { group = "com.onixbyte", name = "common-toolbox" }
+onixbyte-cryptoToolbox = { group = "com.onixbyte", name = "crypto-toolbox", version.ref = "onixbyteVersion" }
 onixbyte-mathToolbox = { group = "com.onixbyte", name = "math-toolbox" }
 onixbyte-identityGenerator = { group = "com.onixbyte", name = "identity-generator" }
 onixbyte-captcha = { group = "com.onixbyte", name = "captcha", version.ref = "onixbyteCaptcha" }
@@ -41,12 +42,10 @@ mybatis-starter-core = { group = "org.mybatis.spring.boot", name = "mybatis-spri
 spring-boot-starter-jpa = { group = "org.springframework.boot", name = "spring-boot-starter-data-jpa" }
 hypersistence-core = { group = "io.hypersistence", name = "hypersistence-utils-hibernate-63", version.ref = "hypersistenceVersion" }
 postgres-driver = { group = "org.postgresql", name = "postgresql", version.ref = "postgresDriverVersion" }
-mysql-driver = { group = "com.mysql", name = "mysql-connector-j" }
 h2-database = { group = "com.h2database", name = "h2", version.ref = "h2Version" }
 spring-boot-starter-redis = { group = "org.springframework.boot", name = "spring-boot-starter-data-redis", version.ref = "springBootVersion" }
 flyway-core = { group = "org.flywaydb", name = "flyway-core" }
 flyway-postgresql = { group = "org.flywaydb", name = "flyway-database-postgresql" }
-flyway-mysql = { group = "org.flywaydb", name = "flyway-mysql" }
 
 # Spring Boot Core & Web
 spring-boot-starter-web = { group = "org.springframework.boot", name = "spring-boot-starter-web" }
@@ -57,16 +56,19 @@ spring-boot-configurationProcessor = { group = "org.springframework.boot", name
 spring-boot-actuator = { group = "org.springframework.boot", name = "spring-boot-starter-actuator" }
 
 # Security & Auth
-spring-boot-starter-security = { group = "org.springframework.boot", name = "spring-boot-starter-security", version.ref = "springBootVersion" }
+spring-boot-starter-security = { group = "org.springframework.boot", name = "spring-boot-starter-security" }
 jwt-core = { group = "com.auth0", name = "java-jwt", version.ref = "javaJwtVersion" }
 
+# Spring Doc
+spring-boot-starter-doc = { group = "org.springdoc", name = "springdoc-openapi-starter-webmvc-ui", version.ref = "springDocVersion" }
+
 # Cloud Services
 aws-sdk-bom = { group = "software.amazon.awssdk", name = "bom", version.ref = "awsSdkVersion" }
 aws-sdk-s3 = { group = "software.amazon.awssdk", name = "s3" }
 
 # Testing
 spring-boot-starter-test = { group = "org.springframework.boot", name = "spring-boot-starter-test", version.ref = "springBootVersion" }
-spring-security-test = { group = "org.springframework.security", name = "spring-security-test", version.ref = "springSecurityVersion" }
+spring-security-test = { group = "org.springframework.security", name = "spring-security-test" }
 reactor-test = { group = "io.projectreactor", name = "reactor-test", version.ref = "reactorVersion" }
 junit-launcher = { group = "org.junit.platform", name = "junit-platform-launcher", version.ref = "junitPlatformVersion" }
 mybatis-starter-test = { group = "org.mybatis.spring.boot", name = "mybatis-spring-boot-starter-test", version.ref = "mybatisVersion" }

src/main/java/com/onixbyte/deltaforceguide/DeltaForceGuideApplication.java

@@ -3,6 +3,11 @@ package com.onixbyte.deltaforceguide;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 
+/**
+ * Entry point for the Delta Force Guide Server application.
+ *
+ * @author zihluwang
+ */
 @SpringBootApplication
 public class DeltaForceGuideApplication {
 

src/main/java/com/onixbyte/deltaforceguide/client/TokenClient.java

@@ -0,0 +1,75 @@
+package com.onixbyte.deltaforceguide.client;
+
+import com.auth0.jwt.JWT;
+import com.auth0.jwt.JWTVerifier;
+import com.auth0.jwt.algorithms.Algorithm;
+import com.auth0.jwt.interfaces.DecodedJWT;
+import com.onixbyte.deltaforceguide.domain.entity.User;
+import com.onixbyte.deltaforceguide.properties.TokenProperties;
+import com.onixbyte.deltaforceguide.utils.DateTimeUtil;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+import java.time.LocalDateTime;
+
+/**
+ * Client for generating and verifying JSON Web Tokens using the Auth0 java-jwt library.
+ *
+ * @author zihluwang
+ */
+@Component
+public class TokenClient {
+
+    private final Algorithm algorithm;
+    private final TokenProperties tokenProperties;
+    private final JWTVerifier verifier;
+
+    /**
+     * Constructs a new TokenClient with the necessary algorithm and token properties.
+     *
+     * @param algorithm       the signing algorithm used to secure the JWT
+     * @param tokenProperties the configuration properties for the token, such as issuer and
+     *                        validity period
+     */
+    @Autowired
+    public TokenClient(
+            Algorithm algorithm,
+            TokenProperties tokenProperties,
+            JWTVerifier verifier
+    ) {
+        this.algorithm = algorithm;
+        this.tokenProperties = tokenProperties;
+        this.verifier = verifier;
+    }
+
+    /**
+     * Generate a JSON Web Token to the current user.
+     *
+     * @param user the current user for whom the token is being generated
+     * @return a JWT string
+     */
+    public String generateToken(User user) {
+        var issuedAt = LocalDateTime.now();
+        var expiresAt = issuedAt.plus(tokenProperties.validTime());
+
+        return JWT.create()
+                .withSubject(user.getUsername())
+                .withIssuer(tokenProperties.issuer())
+                .withIssuedAt(DateTimeUtil.asInstant(issuedAt))
+                .withExpiresAt(DateTimeUtil.asInstant(expiresAt))
+                .sign(algorithm);
+    }
+
+    /**
+     * Verify and decode token.
+     *
+     * @param token a JWT token
+     * @return information included in the given token
+     * @throws com.auth0.jwt.exceptions.JWTVerificationException if the token is invalid, such as
+     *                                                           expired, or not signed by
+     *                                                           specific server
+     */
+    public DecodedJWT verifyToken(String token) {
+        return verifier.verify(token);
+    }
+}

src/main/java/com/onixbyte/deltaforceguide/config/AppConfig.java

@@ -0,0 +1,35 @@
+package com.onixbyte.deltaforceguide.config;
+
+import com.onixbyte.deltaforceguide.interceptor.GitHubWebhookInterceptor;
+import com.onixbyte.deltaforceguide.interceptor.TrafficInterceptor;
+import com.onixbyte.deltaforceguide.properties.AppProperties;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+@Configuration
+@EnableConfigurationProperties(AppProperties.class)
+public class AppConfig implements WebMvcConfigurer {
+
+    private final TrafficInterceptor trafficInterceptor;
+
+    private final GitHubWebhookInterceptor gitHubWebhookInterceptor;
+
+    @Autowired
+    public AppConfig(
+            TrafficInterceptor trafficInterceptor,
+            GitHubWebhookInterceptor gitHubWebhookInterceptor
+    ) {
+        this.trafficInterceptor = trafficInterceptor;
+        this.gitHubWebhookInterceptor = gitHubWebhookInterceptor;
+    }
+
+    @Override
+    public void addInterceptors(InterceptorRegistry registry) {
+        registry.addInterceptor(trafficInterceptor);
+        registry.addInterceptor(gitHubWebhookInterceptor)
+                .addPathPatterns("/webhooks/github");
+    }
+}

src/main/java/com/onixbyte/deltaforceguide/config/CorsConfig.java

@@ -2,46 +2,48 @@ package com.onixbyte.deltaforceguide.config;
 
 import com.onixbyte.deltaforceguide.properties.CorsProperties;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.http.HttpMethod;
-import org.springframework.web.servlet.config.annotation.CorsRegistry;
-import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+import org.springframework.web.cors.CorsConfiguration;
+import org.springframework.web.cors.CorsConfigurationSource;
+import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
 
-import java.util.Optional;
+import java.util.List;
 import java.util.stream.Stream;
 
+/**
+ * Configuration for CORS (Cross-Origin Resource Sharing) policies.
+ *
+ * @author zihluwang
+ */
 @Configuration
 @EnableConfigurationProperties({CorsProperties.class})
-public class CorsConfig implements WebMvcConfigurer {
+public class CorsConfig {
 
-    private final CorsProperties properties;
-
-    public CorsConfig(CorsProperties properties) {
-        this.properties = properties;
-    }
-
-    @Override
-    public void addCorsMappings(CorsRegistry registry) {
-        registry.addMapping("/**")
-                .allowedOrigins(toSafeArray(properties.allowedOrigins()))
-                .allowedHeaders(toSafeArray(properties.allowedHeaders()))
-                .allowedMethods(toHttpMethodNames(properties.allowedMethods()))
-                .allowCredentials(properties.allowCredentials())
-                .maxAge(properties.maxAge().toSeconds())
-                .exposedHeaders(toSafeArray(properties.exposedHeaders()));
-    }
-
-    private static String[] toSafeArray(String[] values) {
-        return values == null ? new String[0] : values;
-    }
-
-    private static String[] toHttpMethodNames(HttpMethod[] methods) {
-        return Optional.ofNullable(methods)
-                .stream()
-                .flatMap(Stream::of)
+    /**
+     * Creates the CORS configuration source with properties from configuration.
+     *
+     * @param properties the CORS configuration properties
+     * @return the CORS configuration source
+     */
+    @Bean
+    public CorsConfigurationSource corsConfigurationSource(
+            CorsProperties properties
+    ) {
+        var corsConfiguration = new CorsConfiguration();
+        corsConfiguration.setAllowCredentials(properties.allowCredentials());
+        corsConfiguration.setAllowedOrigins(List.of(properties.allowedOrigins()));
+        corsConfiguration.setAllowedHeaders(List.of(properties.allowedHeaders()));
+        corsConfiguration.setAllowedMethods(Stream.of(properties.allowedMethods())
                 .map(HttpMethod::name)
-                .toList()
-                .toArray(String[]::new);
-    }
+                .toList());
+        corsConfiguration.setMaxAge(properties.maxAge());
+        corsConfiguration.setAllowPrivateNetwork(properties.allowPrivateNetwork());
+        corsConfiguration.setExposedHeaders(List.of(properties.exposedHeaders()));
 
+        var corsConfigurationSource = new UrlBasedCorsConfigurationSource();
+        corsConfigurationSource.registerCorsConfiguration("/**", corsConfiguration);
+        return corsConfigurationSource;
+    }
 }

src/main/java/com/onixbyte/deltaforceguide/config/FilterConfig.java

@@ -0,0 +1,21 @@
+package com.onixbyte.deltaforceguide.config;
+
+import com.onixbyte.deltaforceguide.filter.WebhookFilter;
+import org.springframework.boot.web.servlet.FilterRegistrationBean;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class FilterConfig {
+
+    @Bean
+    public FilterRegistrationBean<WebhookFilter> webhookFilterBean(WebhookFilter webhookFilter) {
+        var registrationBean = new FilterRegistrationBean<WebhookFilter>();
+
+        registrationBean.setFilter(webhookFilter);
+        registrationBean.addUrlPatterns("/webhooks/*");
+        registrationBean.setOrder(1);
+
+        return registrationBean;
+    }
+}

src/main/java/com/onixbyte/deltaforceguide/config/JacksonConfig.java

@@ -6,6 +6,11 @@ import org.springframework.boot.autoconfigure.jackson.Jackson2ObjectMapperBuilde
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 
+/**
+ * Configuration for Jackson JSON serialisation and deserialisation settings.
+ *
+ * @author zihluwang
+ */
 @Configuration
 public class JacksonConfig {
 

src/main/java/com/onixbyte/deltaforceguide/config/MyBatisConfig.java

@@ -3,6 +3,11 @@ package com.onixbyte.deltaforceguide.config;
 import org.mybatis.spring.annotation.MapperScan;
 import org.springframework.context.annotation.Configuration;
 
+/**
+ * Configuration for MyBatis SQL mapping framework integration.
+ *
+ * @author zihluwang
+ */
 @Configuration
 @MapperScan(basePackages = {"com.onixbyte.deltaforceguide.mapper"})
 public class MyBatisConfig {

src/main/java/com/onixbyte/deltaforceguide/config/OpenApiConfiguration.java

@@ -0,0 +1,26 @@
+package com.onixbyte.deltaforceguide.config;
+
+import io.swagger.v3.oas.annotations.OpenAPIDefinition;
+import io.swagger.v3.oas.annotations.info.Contact;
+import io.swagger.v3.oas.annotations.info.Info;
+import io.swagger.v3.oas.annotations.info.License;
+import org.springframework.context.annotation.Configuration;
+
+@OpenAPIDefinition(
+        info = @Info(
+                title = "Delta Force Guide Server",
+                description = "API for managing Delta Force game firearm builds",
+                version = "1.3.4",
+                contact = @Contact(
+                        name = "Zihlu Wang",
+                        email = "zihlu.wang@onixbyte.com"
+                ),
+                license = @License(
+                        name = "MIT",
+                        url = "https://git.onixbyte.cn/onixbyte/delta-force-guide-server/-/raw/main/LICENCE"
+                )
+        )
+)
+@Configuration
+public class OpenApiConfiguration {
+}

src/main/java/com/onixbyte/deltaforceguide/config/SecurityConfig.java

@@ -0,0 +1,96 @@
+package com.onixbyte.deltaforceguide.config;
+
+import com.auth0.jwt.JWT;
+import com.auth0.jwt.JWTVerifier;
+import com.auth0.jwt.algorithms.Algorithm;
+import com.onixbyte.deltaforceguide.filter.TokenAuthenticationFilter;
+import com.onixbyte.deltaforceguide.properties.CookieProperties;
+import com.onixbyte.deltaforceguide.properties.TokenProperties;
+import com.onixbyte.deltaforceguide.security.provider.UsernamePasswordAuthenticationProvider;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.security.authentication.AuthenticationManager;
+import org.springframework.security.authentication.ProviderManager;
+import org.springframework.security.config.annotation.method.configuration.EnableMethodSecurity;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
+import org.springframework.security.config.annotation.web.configurers.AbstractHttpConfigurer;
+import org.springframework.security.config.http.SessionCreationPolicy;
+import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
+import org.springframework.security.crypto.password.PasswordEncoder;
+import org.springframework.security.web.SecurityFilterChain;
+import org.springframework.security.web.access.ExceptionTranslationFilter;
+import org.springframework.web.cors.CorsConfigurationSource;
+
+/**
+ * Spring Security configuration defining authentication, authorisation, and filter chains.
+ *
+ * @author zihluwang
+ */
+@Configuration
+@EnableWebSecurity
+@EnableMethodSecurity
+@EnableConfigurationProperties({TokenProperties.class, CookieProperties.class})
+public class SecurityConfig {
+
+    /**
+     * Configures the HTTP security filter chain including endpoint authorisation and JWT filter.
+     *
+     * @param http the HTTP security builder
+     * @return the configured security filter chain
+     */
+    @Bean
+    public SecurityFilterChain securityFilterChain(
+            HttpSecurity httpSecurity,
+            CorsConfigurationSource corsConfigurationSource,
+            TokenAuthenticationFilter tokenAuthenticationFilter
+    ) throws Exception {
+        return httpSecurity
+                .cors((cors) -> cors
+                        .configurationSource(corsConfigurationSource))
+                .csrf(AbstractHttpConfigurer::disable)
+                .sessionManagement((customiser) -> customiser
+                        .sessionCreationPolicy(SessionCreationPolicy.STATELESS))
+                .authorizeHttpRequests((customiser) -> customiser
+                        .anyRequest().permitAll()
+                )
+                .addFilterAfter(tokenAuthenticationFilter, ExceptionTranslationFilter.class)
+                .build();
+    }
+
+    /**
+     * Provides the BCrypt password encoder for credential hashing.
+     * @return the BCrypt password encoder
+     */
+    @Bean
+    public PasswordEncoder passwordEncoder() {
+        return new BCryptPasswordEncoder();
+    }
+
+    /**
+     * Provides the authentication manager for the security configuration.
+     *
+     * @return the authentication manager
+     */
+    @Bean
+    public AuthenticationManager authenticationManager(
+            UsernamePasswordAuthenticationProvider usernamePasswordAuthenticationProvider
+    ) {
+        return new ProviderManager(
+                usernamePasswordAuthenticationProvider
+        );
+    }
+
+    @Bean
+    public Algorithm algorithm(TokenProperties properties) {
+        return Algorithm.HMAC256(properties.secret());
+    }
+
+    @Bean
+    public JWTVerifier verifier(Algorithm algorithm, TokenProperties tokenProperties) {
+        return JWT.require(algorithm)
+                .withIssuer(tokenProperties.issuer())
+                .build();
+    }
+}

src/main/java/com/onixbyte/deltaforceguide/config/SpringDataConfig.java

@@ -3,6 +3,11 @@ package com.onixbyte.deltaforceguide.config;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
 
+/**
+ * Configuration for Spring Data JPA auditing and repository settings.
+ *
+ * @author zihluwang
+ */
 @Configuration
 @EnableJpaRepositories(basePackages = {"com.onixbyte.deltaforceguide.repository"})
 public class SpringDataConfig {

src/main/java/com/onixbyte/deltaforceguide/config/WebhookConfig.java

@@ -0,0 +1,10 @@
+package com.onixbyte.deltaforceguide.config;
+
+import com.onixbyte.deltaforceguide.properties.GitHubWebhookProperties;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+@EnableConfigurationProperties({GitHubWebhookProperties.class})
+public class WebhookConfig {
+}

src/main/java/com/onixbyte/deltaforceguide/controller/AuthController.java

@@ -0,0 +1,66 @@
+package com.onixbyte.deltaforceguide.controller;
+
+import com.onixbyte.deltaforceguide.domain.dto.LoginRequest;
+import com.onixbyte.deltaforceguide.domain.dto.UserResponse;
+import com.onixbyte.deltaforceguide.client.TokenClient;
+import com.onixbyte.deltaforceguide.security.annotation.RequiresAuth;
+import com.onixbyte.deltaforceguide.service.AuthService;
+import com.onixbyte.deltaforceguide.service.CookieService;
+import com.onixbyte.deltaforceguide.shared.CookieName;
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.tags.Tag;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.ResponseEntity;
+import org.springframework.validation.annotation.Validated;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.time.Duration;
+import java.time.LocalDateTime;
+
+/**
+ * REST controller for user authentication endpoints (login, logout).
+ *
+ * @author zihluwang
+ */
+@Tag(name = "用户鉴权", description = "处理用户登录与退出功能")
+@RestController
+@RequestMapping("/auth")
+public class AuthController {
+
+    private final AuthService authService;
+    private final TokenClient tokenClient;
+    private final CookieService cookieService;
+
+    public AuthController(AuthService authService, TokenClient tokenClient, CookieService cookieService) {
+        this.authService = authService;
+        this.tokenClient = tokenClient;
+        this.cookieService = cookieService;
+    }
+
+    @Operation(description = "用户登录")
+    @PostMapping("/login")
+    public ResponseEntity<UserResponse> login(@Validated @RequestBody LoginRequest request) {
+        var user = authService.login(request);
+        var currentTime = LocalDateTime.now();
+        var accessToken = tokenClient.generateToken(user);
+        var accessTokenCookie = cookieService.buildCookie(CookieName.ACCESS_TOKEN, accessToken);
+        var cookieMaxAge = accessTokenCookie.getMaxAge();
+
+        return ResponseEntity.ok()
+                .header(HttpHeaders.SET_COOKIE, accessTokenCookie.toString())
+                .body(UserResponse.from(user, currentTime.plus(cookieMaxAge)));
+    }
+
+    @RequiresAuth
+    @Operation(description = "退出登录")
+    @PostMapping("/logout")
+    public ResponseEntity<Void> logout() {
+        var expiredCookie = cookieService.buildCookie(CookieName.ACCESS_TOKEN, "", Duration.ZERO);
+        return ResponseEntity.noContent()
+                .header(HttpHeaders.SET_COOKIE, expiredCookie.toString())
+                .build();
+    }
+}

src/main/java/com/onixbyte/deltaforceguide/controller/DailyPasswordController.java

@@ -0,0 +1,32 @@
+package com.onixbyte.deltaforceguide.controller;
+
+import com.onixbyte.deltaforceguide.domain.dto.DailyPasswordResponse;
+import com.onixbyte.deltaforceguide.service.DailyPasswordService;
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.tags.Tag;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+/**
+ * REST controller for retrieving daily-generated passwords.
+ *
+ * @author zihluwang
+ */
+@Tag(name = "每日密码", description = "获取每日密码信息")
+@RestController
+@RequestMapping("/daily-passwords")
+public class DailyPasswordController {
+
+    private final DailyPasswordService dailyPasswordService;
+
+    public DailyPasswordController(DailyPasswordService dailyPasswordService) {
+        this.dailyPasswordService = dailyPasswordService;
+    }
+
+    @Operation(description = "获取当日的每日密码数据，该数据将被缓存一天")
+    @GetMapping
+    public DailyPasswordResponse getDailyPassword() {
+        return dailyPasswordService.getDailyPassword();
+    }
+}

src/main/java/com/onixbyte/deltaforceguide/controller/FirearmController.java

@@ -1,21 +1,26 @@
 package com.onixbyte.deltaforceguide.controller;
 
+import com.onixbyte.deltaforceguide.domain.dto.FirearmRequest;
 import com.onixbyte.deltaforceguide.domain.dto.FirearmResponse;
 import com.onixbyte.deltaforceguide.domain.dto.PageResponse;
 import com.onixbyte.deltaforceguide.enumeration.FirearmType;
+import com.onixbyte.deltaforceguide.security.annotation.RequiresAuth;
 import com.onixbyte.deltaforceguide.service.FirearmService;
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.tags.Tag;
 import jakarta.validation.constraints.Max;
 import jakarta.validation.constraints.Min;
 import org.springframework.data.domain.PageRequest;
 import org.springframework.data.domain.Sort;
 import org.springframework.validation.annotation.Validated;
-import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.PathVariable;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RequestParam;
-import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.bind.annotation.*;
 
-@Validated
+/**
+ * REST controller for firearm CRUD operations.
+ *
+ * @author zihluwang
+ */
+@Tag(name = "武器管理", description = "与武器有关的操作")
 @RestController
 @RequestMapping("/firearms")
 public class FirearmController {
@@ -26,6 +31,8 @@ public class FirearmController {
         this.firearmService = firearmService;
     }
 
+    @Operation(description = "获取分页武器数据")
+    @Validated
     @GetMapping
     public PageResponse<FirearmResponse> pageQuery(
             @RequestParam(defaultValue = "0") @Min(0) int page,
@@ -37,9 +44,29 @@ public class FirearmController {
         return firearmService.pageQuery(type, PageRequest.of(page, size, Sort.by(direction, sortBy)));
     }
 
+    @Operation(description = "获取指定武器的数据")
     @GetMapping("/{id}")
     public FirearmResponse queryById(@PathVariable Long id) {
         return firearmService.queryById(id);
     }
+
+    @RequiresAuth
+    @PostMapping
+    public FirearmResponse addFirearm(@Validated @RequestBody FirearmRequest request) {
+        return firearmService.addFirearm(request);
     }
 
+    @RequiresAuth
+    @Operation(description = "更新指定武器的数据")
+    @PutMapping("/{id}")
+    public FirearmResponse updateFirearm(@PathVariable Long id, @Validated @RequestBody FirearmRequest request) {
+        return firearmService.updateFirearm(id, request);
+    }
+
+    @RequiresAuth
+    @Operation(description = "删除指定武器的数据")
+    @DeleteMapping("/{id}")
+    public void deleteFirearm(@PathVariable Long id) {
+        firearmService.deleteFirearm(id);
+    }
+}

src/main/java/com/onixbyte/deltaforceguide/controller/GitHubWebhookController.java

@@ -0,0 +1,43 @@
+package com.onixbyte.deltaforceguide.controller;
+
+import com.onixbyte.deltaforceguide.domain.dto.GitHubIssueRequest;
+import com.onixbyte.deltaforceguide.service.WebhookService;
+import com.onixbyte.deltaforceguide.shared.GitHubWebhookHeader;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestHeader;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/webhooks/github")
+public class GitHubWebhookController {
+
+    private static final Logger log = LoggerFactory.getLogger(GitHubWebhookController.class);
+
+    private final WebhookService webhookService;
+
+    public GitHubWebhookController(WebhookService webhookService) {
+        this.webhookService = webhookService;
+    }
+
+    @PostMapping
+    public ResponseEntity<Void> handleWebhook(
+            @RequestHeader(GitHubWebhookHeader.EVENT) String event,
+            @RequestBody GitHubIssueRequest request
+    ) {
+        if (!"issues".equals(event)) {
+            log.debug("Ignoring non-issue event: {}", event);
+            return ResponseEntity.ok().build();
+        }
+        if (!"opened".equals(request.action())) {
+            log.debug("Ignoring issue action: {}", request.action());
+            return ResponseEntity.ok().build();
+        }
+        webhookService.processIssueEvent(request);
+        return ResponseEntity.ok().build();
+    }
+}

src/main/java/com/onixbyte/deltaforceguide/controller/GlobalExceptionHandler.java

@@ -0,0 +1,24 @@
+package com.onixbyte.deltaforceguide.controller;
+
+import com.onixbyte.deltaforceguide.domain.dto.ErrorResponse;
+import com.onixbyte.deltaforceguide.exeption.BizException;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+
+/**
+ * Global exception handler that translates exceptions into standard error responses.
+ *
+ * @author zihluwang
+ */
+@RestControllerAdvice
+public class GlobalExceptionHandler {
+
+    @ExceptionHandler(BizException.class)
+    public ResponseEntity<ErrorResponse> handleBizException(BizException exception) {
+        var status = exception.getStatus();
+        return ResponseEntity.status(status)
+                .body(new ErrorResponse(exception.getMessage()));
+    }
+}
+

src/main/java/com/onixbyte/deltaforceguide/controller/ModificationController.java

@@ -1,21 +1,38 @@
 package com.onixbyte.deltaforceguide.controller;
 
+import com.onixbyte.deltaforceguide.domain.dto.ModificationBatchCreateRequest;
+import com.onixbyte.deltaforceguide.domain.dto.ModificationRequest;
 import com.onixbyte.deltaforceguide.domain.dto.ModificationResponse;
 import com.onixbyte.deltaforceguide.domain.dto.PageResponse;
+import com.onixbyte.deltaforceguide.security.annotation.RequiresAuth;
 import com.onixbyte.deltaforceguide.service.ModificationService;
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.tags.Tag;
+import jakarta.validation.Valid;
 import jakarta.validation.constraints.Max;
 import jakarta.validation.constraints.Min;
 import jakarta.validation.constraints.Positive;
 import org.springframework.data.domain.PageRequest;
 import org.springframework.data.domain.Sort;
 import org.springframework.validation.annotation.Validated;
+import org.springframework.web.bind.annotation.DeleteMapping;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.RestController;
 
-@Validated
+import java.util.List;
+
+/**
+ * REST controller for modification CRUD operations, including batch creation and deletion.
+ *
+ * @author zihluwang
+ */
+@Tag(name = "改装管理", description = "对枪械改装的管理")
 @RestController
 @RequestMapping("/modifications")
 public class ModificationController {
@@ -26,20 +43,59 @@ public class ModificationController {
         this.modificationService = modificationService;
     }
 
+    @Operation(description = "分页查询改装信息")
+    @Validated
     @GetMapping
     public PageResponse<ModificationResponse> pageQuery(
             @RequestParam(defaultValue = "0") @Min(0) int page,
             @RequestParam(defaultValue = "20") @Min(1) @Max(100) int size,
             @RequestParam(required = false) @Positive Long firearmId,
             @RequestParam(defaultValue = "id") String sortBy,
-            @RequestParam(defaultValue = "DESC") Sort.Direction direction
+            @RequestParam(defaultValue = "DESC") Sort.Direction direction,
+            @RequestParam(required = false) List<String> tags
     ) {
-        return modificationService.pageQuery(firearmId, PageRequest.of(page, size, Sort.by(direction, sortBy)));
+        return modificationService.pageQuery(firearmId, tags, PageRequest.of(page, size, Sort.by(direction, sortBy)));
     }
 
+    @Operation(description = "查询指定改装的信息")
     @GetMapping("/{id}")
     public ModificationResponse queryById(@PathVariable Long id) {
         return modificationService.queryById(id);
     }
+
+    @RequiresAuth
+    @Operation(description = "创建改装")
+    @PostMapping
+    public ModificationResponse create(@Valid @RequestBody ModificationRequest request) {
+        return modificationService.create(request);
     }
 
+    @RequiresAuth
+    @Operation(description = "批量创建改装")
+    @PostMapping("/batch")
+    public List<ModificationResponse> batchCreate(@Valid @RequestBody ModificationBatchCreateRequest request) {
+        return modificationService.batchCreate(request.modifications());
+    }
+
+    @RequiresAuth
+    @Operation(description = "修改指定改装")
+    @PutMapping("/{id}")
+    public ModificationResponse update(@PathVariable Long id, @Valid @RequestBody ModificationRequest request) {
+        return modificationService.update(id, request);
+    }
+
+    @RequiresAuth
+    @Operation(description = "删除指定改装")
+    @DeleteMapping("/{id}")
+    public void delete(@PathVariable Long id) {
+        modificationService.delete(id);
+    }
+
+    @RequiresAuth
+    @Operation(description = "批量删除改装")
+    @DeleteMapping("/batch-delete")
+    @Validated
+    public void batchDelete(@RequestParam List<@Positive Long> ids) {
+        modificationService.batchDelete(ids);
+    }
+}

src/main/java/com/onixbyte/deltaforceguide/controller/TagController.java

@@ -0,0 +1,34 @@
+package com.onixbyte.deltaforceguide.controller;
+
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.tags.Tag;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+import com.onixbyte.deltaforceguide.service.ModificationService;
+
+import java.util.List;
+
+/**
+ * REST controller for retrieving available modification tags.
+ *
+ * @author zihluwang
+ */
+@Tag(name = "标签管理", description = "管理标签信息")
+@RestController
+@RequestMapping("/tags")
+public class TagController {
+
+    private final ModificationService modificationService;
+
+    public TagController(ModificationService modificationService) {
+        this.modificationService = modificationService;
+    }
+
+    @Operation(description = "查询指定武器或所有武器的标签")
+    @GetMapping
+    public List<String> getTags(@RequestParam(required = false) Long firearmId) {
+        return modificationService.findAllTags(firearmId);
+    }
+}

src/main/java/com/onixbyte/deltaforceguide/controller/VersionController.java

@@ -0,0 +1,26 @@
+package com.onixbyte.deltaforceguide.controller;
+
+import com.onixbyte.deltaforceguide.service.AppService;
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.tags.Tag;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@Tag(name = "版本信息")
+@RestController
+@RequestMapping("/versions")
+public class VersionController {
+
+    private final AppService appService;
+
+    public VersionController(AppService appService) {
+        this.appService = appService;
+    }
+
+    @Operation(description = "获取当前应用版本号")
+    @GetMapping
+    public String getVersion() {
+        return appService.getVersion();
+    }
+}

src/main/java/com/onixbyte/deltaforceguide/domain/converter/FirearmTypeConverter.java

@@ -4,6 +4,11 @@ import com.onixbyte.deltaforceguide.enumeration.FirearmType;
 import jakarta.persistence.AttributeConverter;
 import jakarta.persistence.Converter;
 
+/**
+ * JPA attribute converter that maps {@link FirearmType} enum to/from its integer database representation.
+ *
+ * @author zihluwang
+ */
 @Converter
 public class FirearmTypeConverter implements AttributeConverter<FirearmType, Integer> {
 

src/main/java/com/onixbyte/deltaforceguide/domain/dto/AccessoryRequest.java

@@ -0,0 +1,25 @@
+package com.onixbyte.deltaforceguide.domain.dto;
+
+import jakarta.validation.Valid;
+import jakarta.validation.constraints.NotBlank;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Request DTO for creating or updating an accessory attached to a modification.
+ *
+ * @author zihluwang
+ */
+public record AccessoryRequest(
+        @NotBlank(message = "插槽名称不能为空")
+        String slotName,
+        @NotBlank(message = "配件名称不能为空")
+        String accessoryName,
+        List<@Valid TuningRequest> tunings
+) {
+    public List<TuningRequest> tunings() {
+        return tunings == null ? new ArrayList<>() : tunings;
+    }
+}
+

src/main/java/com/onixbyte/deltaforceguide/domain/dto/AccessoryResponse.java

@@ -0,0 +1,27 @@
+package com.onixbyte.deltaforceguide.domain.dto;
+
+import com.onixbyte.deltaforceguide.domain.entity.Accessory;
+
+import java.util.List;
+
+/**
+ * Response DTO for an accessory attached to a modification.
+ *
+ * @author zihluwang
+ */
+public record AccessoryResponse(
+        String slotName,
+        String accessoryName,
+        List<TuningResponse> tunings
+) {
+    public static AccessoryResponse from(Accessory accessory) {
+        return new AccessoryResponse(
+                accessory.getSlotName(),
+                accessory.getAccessoryName(),
+                accessory.getTunings() == null
+                        ? List.of()
+                        : accessory.getTunings().stream().map(TuningResponse::from).toList()
+        );
+    }
+}
+

src/main/java/com/onixbyte/deltaforceguide/domain/dto/DailyPassword.java

@@ -0,0 +1,12 @@
+package com.onixbyte.deltaforceguide.domain.dto;
+
+/**
+ * DTO representing a single daily-generated password for a map.
+ *
+ * @author zihluwang
+ */
+public record DailyPassword(
+        String mapName,
+        String password
+) {
+}

src/main/java/com/onixbyte/deltaforceguide/domain/dto/DailyPasswordData.java

@@ -0,0 +1,19 @@
+package com.onixbyte.deltaforceguide.domain.dto;
+
+import java.time.LocalDateTime;
+import java.util.List;
+
+/**
+ * DTO containing daily password data including update information and password list.
+ *
+ * @author zihluwang
+ */
+public record DailyPasswordData(
+        String updateDate,
+        Integer totalCount,
+        List<DailyPassword> passwords,
+        String source,
+        LocalDateTime lastUpdated,
+        Long timestamp
+) {
+}

src/main/java/com/onixbyte/deltaforceguide/domain/dto/DailyPasswordMetadata.java

@@ -0,0 +1,12 @@
+package com.onixbyte.deltaforceguide.domain.dto;
+
+/**
+ * DTO holding metadata about the daily password source and update tracking.
+ *
+ * @author zihluwang
+ */
+public record DailyPasswordMetadata(
+        String version,
+        String author
+) {
+}

src/main/java/com/onixbyte/deltaforceguide/domain/dto/DailyPasswordResponse.java

@@ -0,0 +1,14 @@
+package com.onixbyte.deltaforceguide.domain.dto;
+
+/**
+ * Response DTO wrapping daily password data with metadata.
+ *
+ * @author zihluwang
+ */
+public record DailyPasswordResponse(
+        String status,
+        String message,
+        DailyPasswordData data,
+        DailyPasswordMetadata metadata
+) {
+}

src/main/java/com/onixbyte/deltaforceguide/domain/dto/ErrorResponse.java

@@ -0,0 +1,12 @@
+package com.onixbyte.deltaforceguide.domain.dto;
+
+/**
+ * Standard error response body returned on API failures.
+ *
+ * @author zihluwang
+ */
+public record ErrorResponse(
+        String message
+) {
+}
+

src/main/java/com/onixbyte/deltaforceguide/domain/dto/FirearmRequest.java

@@ -0,0 +1,20 @@
+package com.onixbyte.deltaforceguide.domain.dto;
+
+import com.onixbyte.deltaforceguide.enumeration.FirearmType;
+
+/**
+ * Request DTO for creating or updating a firearm.
+ *
+ * @author zihluwang
+ */
+public record FirearmRequest(
+        String name,
+        FirearmType type,
+        String level,
+        String calibre,
+        Integer fireRate,
+        Integer armourDamage,
+        Integer bodyDamage,
+        String review
+) {
+}

src/main/java/com/onixbyte/deltaforceguide/domain/dto/FirearmResponse.java

@@ -3,11 +3,20 @@ package com.onixbyte.deltaforceguide.domain.dto;
 import com.onixbyte.deltaforceguide.domain.entity.Firearm;
 import com.onixbyte.deltaforceguide.enumeration.FirearmType;
 
+/**
+ * Response DTO for a firearm record, including associated modifications.
+ *
+ * @author zihluwang
+ */
 public record FirearmResponse(
         Long id,
         String name,
         FirearmType type,
         String level,
+        String calibre,
+        Integer fireRate,
+        Integer armourDamage,
+        Integer bodyDamage,
         String review
 ) {
     public static FirearmResponse from(Firearm firearm) {
@@ -16,6 +25,10 @@ public record FirearmResponse(
                 firearm.getName(),
                 firearm.getType(),
                 firearm.getLevel(),
+                firearm.getCalibre(),
+                firearm.getFireRate(),
+                firearm.getArmourDamage(),
+                firearm.getBodyDamage(),
                 firearm.getReview()
         );
     }

src/main/java/com/onixbyte/deltaforceguide/domain/dto/GitHubIssueRequest.java

@@ -0,0 +1,15 @@
+package com.onixbyte.deltaforceguide.domain.dto;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.databind.PropertyNamingStrategies;
+import com.fasterxml.jackson.databind.annotation.JsonNaming;
+
+@JsonNaming(PropertyNamingStrategies.SnakeCaseStrategy.class)
+@JsonIgnoreProperties(ignoreUnknown = true)
+public record GitHubIssueRequest(
+        String action,
+        GitHubWebhookIssue issue,
+        GitHubWebhookRepository repository,
+        GitHubWebhookSender sender
+) {
+}

src/main/java/com/onixbyte/deltaforceguide/domain/dto/GitHubWebhookIssue.java

@@ -0,0 +1,20 @@
+package com.onixbyte.deltaforceguide.domain.dto;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.databind.PropertyNamingStrategies;
+import com.fasterxml.jackson.databind.annotation.JsonNaming;
+
+import java.util.List;
+
+@JsonNaming(PropertyNamingStrategies.SnakeCaseStrategy.class)
+@JsonIgnoreProperties(ignoreUnknown = true)
+public record GitHubWebhookIssue(
+        String url,
+        Long id,
+        Long number,
+        String title,
+        String body,
+        List<GitHubWebhookLabel> labels
+) {
+
+}

src/main/java/com/onixbyte/deltaforceguide/domain/dto/GitHubWebhookLabel.java

@@ -0,0 +1,12 @@
+package com.onixbyte.deltaforceguide.domain.dto;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.databind.PropertyNamingStrategies;
+import com.fasterxml.jackson.databind.annotation.JsonNaming;
+
+@JsonNaming(PropertyNamingStrategies.SnakeCaseStrategy.class)
+@JsonIgnoreProperties(ignoreUnknown = true)
+public record GitHubWebhookLabel(
+        String name
+) {
+}

src/main/java/com/onixbyte/deltaforceguide/domain/dto/GitHubWebhookRepository.java

@@ -0,0 +1,12 @@
+package com.onixbyte.deltaforceguide.domain.dto;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.databind.PropertyNamingStrategies;
+import com.fasterxml.jackson.databind.annotation.JsonNaming;
+
+@JsonNaming(PropertyNamingStrategies.SnakeCaseStrategy.class)
+@JsonIgnoreProperties(ignoreUnknown = true)
+public record GitHubWebhookRepository(
+        String fullName
+) {
+}

src/main/java/com/onixbyte/deltaforceguide/domain/dto/GitHubWebhookSender.java

@@ -0,0 +1,12 @@
+package com.onixbyte.deltaforceguide.domain.dto;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.databind.PropertyNamingStrategies;
+import com.fasterxml.jackson.databind.annotation.JsonNaming;
+
+@JsonNaming(PropertyNamingStrategies.SnakeCaseStrategy.class)
+@JsonIgnoreProperties(ignoreUnknown = true)
+public record GitHubWebhookSender(
+        String login
+) {
+}

src/main/java/com/onixbyte/deltaforceguide/domain/dto/LoginRequest.java

@@ -0,0 +1,20 @@
+package com.onixbyte.deltaforceguide.domain.dto;
+
+import io.swagger.v3.oas.annotations.media.Schema;
+import jakarta.validation.constraints.NotBlank;
+
+/**
+ * Login request containing principle (username/email) and credential (password).
+ *
+ * @author zihluwang
+ */
+@Schema(description = "登录请求")
+public record LoginRequest(
+        @NotBlank(message = "登录名称不能为空")
+        @Schema(description = "用户名或电子邮箱", requiredMode = Schema.RequiredMode.REQUIRED)
+        String principle,
+        @NotBlank(message = "登录口令不能为空")
+        @Schema(description = "密码", requiredMode = Schema.RequiredMode.REQUIRED)
+        String credential
+) {
+}

src/main/java/com/onixbyte/deltaforceguide/domain/dto/ModificationBatchCreateRequest.java

@@ -0,0 +1,18 @@
+package com.onixbyte.deltaforceguide.domain.dto;
+
+import jakarta.validation.Valid;
+import jakarta.validation.constraints.NotEmpty;
+
+import java.util.List;
+
+/**
+ * Request DTO for batch creation of modifications.
+ *
+ * @author zihluwang
+ */
+public record ModificationBatchCreateRequest(
+        @NotEmpty(message = "批量创建列表不能为空")
+        List<@Valid ModificationRequest> modifications
+) {
+}
+

src/main/java/com/onixbyte/deltaforceguide/domain/dto/ModificationBatchDeleteRequest.java

@@ -0,0 +1,18 @@
+package com.onixbyte.deltaforceguide.domain.dto;
+
+import jakarta.validation.constraints.NotEmpty;
+import jakarta.validation.constraints.Positive;
+
+import java.util.List;
+
+/**
+ * Request DTO for batch deletion of modifications by ID.
+ *
+ * @author zihluwang
+ */
+public record ModificationBatchDeleteRequest(
+        @NotEmpty(message = "批量删除ID列表不能为空")
+        List<@Positive(message = "ID必须为正数") Long> ids
+) {
+}
+

src/main/java/com/onixbyte/deltaforceguide/domain/dto/ModificationRequest.java

@@ -0,0 +1,38 @@
+package com.onixbyte.deltaforceguide.domain.dto;
+
+import jakarta.validation.Valid;
+import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.NotNull;
+import jakarta.validation.constraints.Positive;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Request DTO for creating or updating a modification.
+ *
+ * @author zihluwang
+ */
+public record ModificationRequest(
+        @NotNull(message = "武器ID不能为空")
+        @Positive(message = "武器ID必须为正数")
+        Long firearmId,
+        @NotBlank(message = "改装名称不能为空")
+        String name,
+        @NotBlank(message = "改装代码不能为空")
+        String code,
+        List<@NotBlank(message = "标签不能为空") String> tags,
+        List<@Valid AccessoryRequest> accessories,
+        String note,
+        String author,
+        String videoUrl
+) {
+    public List<String> tags() {
+        return tags == null ? new ArrayList<>() : tags;
+    }
+
+    public List<AccessoryRequest> accessories() {
+        return accessories == null ? new ArrayList<>() : accessories;
+    }
+}
+

src/main/java/com/onixbyte/deltaforceguide/domain/dto/ModificationResponse.java

@@ -4,12 +4,18 @@ import com.onixbyte.deltaforceguide.domain.entity.Modification;
 
 import java.util.List;
 
+/**
+ * Response DTO for a modification record including accessories and tags.
+ *
+ * @author zihluwang
+ */
 public record ModificationResponse(
         Long id,
         Long firearmId,
         String name,
         String code,
         List<String> tags,
+        List<AccessoryResponse> accessories,
         String note,
         String author,
         String videoUrl
@@ -21,6 +27,9 @@ public record ModificationResponse(
                 modification.getName(),
                 modification.getCode(),
                 modification.getTags(),
+                modification.getAccessories() == null
+                        ? List.of()
+                        : modification.getAccessories().stream().map(AccessoryResponse::from).toList(),
                 modification.getNote(),
                 modification.getAuthor(),
                 modification.getVideoUrl()

src/main/java/com/onixbyte/deltaforceguide/domain/dto/PageResponse.java

@@ -4,6 +4,11 @@ import org.springframework.data.domain.Page;
 
 import java.util.List;
 
+/**
+ * Generic paginated response wrapper for list endpoints.
+ *
+ * @author zihluwang
+ */
 public record PageResponse<T>(
         List<T> items,
         int page,

src/main/java/com/onixbyte/deltaforceguide/domain/dto/TuningRequest.java

@@ -0,0 +1,18 @@
+package com.onixbyte.deltaforceguide.domain.dto;
+
+import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.NotNull;
+
+/**
+ * Request DTO for a tuning adjustment on an accessory.
+ *
+ * @author zihluwang
+ */
+public record TuningRequest(
+        @NotBlank(message = "调校项名称不能为空")
+        String tuningName,
+        @NotNull(message = "调校值不能为空")
+        Double tuningValue
+) {
+}
+

src/main/java/com/onixbyte/deltaforceguide/domain/dto/TuningResponse.java

@@ -0,0 +1,21 @@
+package com.onixbyte.deltaforceguide.domain.dto;
+
+import com.onixbyte.deltaforceguide.domain.entity.Tuning;
+
+/**
+ * Response DTO for a tuning adjustment on an accessory.
+ *
+ * @author zihluwang
+ */
+public record TuningResponse(
+        String tuningName,
+        Double tuningValue
+) {
+    public static TuningResponse from(Tuning tuning) {
+        return new TuningResponse(
+                tuning.getTuningName(),
+                tuning.getTuningValue()
+        );
+    }
+}
+

src/main/java/com/onixbyte/deltaforceguide/domain/dto/UserResponse.java

@@ -0,0 +1,26 @@
+package com.onixbyte.deltaforceguide.domain.dto;
+
+import com.onixbyte.deltaforceguide.domain.entity.User;
+
+import java.time.LocalDateTime;
+
+/**
+ * Response DTO for a user account, including associated credentials.
+ *
+ * @author zihluwang
+ */
+public record UserResponse(
+        Long id,
+        String username,
+        String email,
+        LocalDateTime expiration
+) {
+    public static UserResponse from(User user, LocalDateTime expiration) {
+        return new UserResponse(
+                user.getId(),
+                user.getUsername(),
+                user.getEmail(),
+                expiration
+        );
+    }
+}

src/main/java/com/onixbyte/deltaforceguide/domain/entity/Accessory.java

@@ -0,0 +1,72 @@
+package com.onixbyte.deltaforceguide.domain.entity;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+
+/**
+ * Entity representing an accessory attached to a modification, stored as JSONB.
+ *
+ * @author zihluwang
+ */
+public class Accessory {
+
+    private String slotName;
+
+    private String accessoryName;
+
+    private List<Tuning> tunings = new ArrayList<>();
+
+    public Accessory() {
+    }
+
+    public String getSlotName() {
+        return slotName;
+    }
+
+    public void setSlotName(String slotName) {
+        this.slotName = slotName;
+    }
+
+    public String getAccessoryName() {
+        return accessoryName;
+    }
+
+    public void setAccessoryName(String accessoryName) {
+        this.accessoryName = accessoryName;
+    }
+
+    public List<Tuning> getTunings() {
+        return tunings;
+    }
+
+    public void setTunings(List<Tuning> tunings) {
+        this.tunings = tunings;
+    }
+
+    public void addTuning(Tuning tuning) {
+        this.tunings.add(tuning);
+    }
+
+    public void removeTuning(Tuning tuning) {
+        this.tunings.remove(tuning);
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (!(o instanceof Accessory accessory)) {
+            return false;
+        }
+        return Objects.equals(slotName, accessory.slotName)
+                && Objects.equals(accessoryName, accessory.accessoryName)
+                && Objects.equals(tunings, accessory.tunings);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(slotName, accessoryName, tunings);
+    }
+}

src/main/java/com/onixbyte/deltaforceguide/domain/entity/Firearm.java

@@ -15,6 +15,11 @@ import jakarta.persistence.Table;
 import java.util.ArrayList;
 import java.util.List;
 
+/**
+ * Entity representing a firearm in the Delta Force game.
+ *
+ * @author zihluwang
+ */
 @Entity
 @Table(name = "firearm")
 public class Firearm {
@@ -36,6 +41,18 @@ public class Firearm {
     @Column(name = "review", columnDefinition = "TEXT")
     private String review;
 
+    @Column(name = "calibre")
+    private String calibre;
+
+    @Column(name = "fire_rate")
+    private Integer fireRate;
+
+    @Column(name = "armour_damage")
+    private Integer armourDamage;
+
+    @Column(name = "body_damage")
+    private Integer bodyDamage;
+
     @OneToMany(mappedBy = "firearm", cascade = CascadeType.ALL, orphanRemoval = true)
     private List<Modification> modifications = new ArrayList<>();
 
@@ -79,6 +96,38 @@ public class Firearm {
         this.review = review;
     }
 
+    public String getCalibre() {
+        return calibre;
+    }
+
+    public void setCalibre(String calibre) {
+        this.calibre = calibre;
+    }
+
+    public Integer getFireRate() {
+        return fireRate;
+    }
+
+    public void setFireRate(Integer fireRate) {
+        this.fireRate = fireRate;
+    }
+
+    public Integer getArmourDamage() {
+        return armourDamage;
+    }
+
+    public void setArmourDamage(Integer armourDamage) {
+        this.armourDamage = armourDamage;
+    }
+
+    public Integer getBodyDamage() {
+        return bodyDamage;
+    }
+
+    public void setBodyDamage(Integer bodyDamage) {
+        this.bodyDamage = bodyDamage;
+    }
+
     public List<Modification> getModifications() {
         return modifications;
     }
@@ -96,5 +145,88 @@ public class Firearm {
         this.modifications.remove(modification);
         modification.setFirearm(null);
     }
+
+    public static Builder builder() {
+        return new Builder();
+    }
+
+    public static class Builder {
+
+        private Long id;
+        private String name;
+        private FirearmType type;
+        private String level;
+        private String review;
+        private String calibre;
+        private Integer fireRate;
+        private Integer armourDamage;
+        private Integer bodyDamage;
+        private List<Modification> modifications;
+
+        public Builder id(Long id) {
+            this.id = id;
+            return this;
+        }
+
+        public Builder name(String name) {
+            this.name = name;
+            return this;
+        }
+
+        public Builder type(FirearmType type) {
+            this.type = type;
+            return this;
+        }
+
+        public Builder level(String level) {
+            this.level = level;
+            return this;
+        }
+
+        public Builder review(String review) {
+            this.review = review;
+            return this;
+        }
+
+        public Builder calibre(String calibre) {
+            this.calibre = calibre;
+            return this;
+        }
+
+        public Builder fireRate(Integer fireRate) {
+            this.fireRate = fireRate;
+            return this;
+        }
+
+        public Builder armourDamage(Integer armourDamage) {
+            this.armourDamage = armourDamage;
+            return this;
+        }
+
+        public Builder bodyDamage(Integer bodyDamage) {
+            this.bodyDamage = bodyDamage;
+            return this;
+        }
+
+        public Builder modifications(List<Modification> modifications) {
+            this.modifications = modifications;
+            return this;
+        }
+
+        public Firearm build() {
+            Firearm firearm = new Firearm();
+            firearm.id = this.id;
+            firearm.name = this.name;
+            firearm.type = this.type;
+            firearm.level = this.level;
+            firearm.review = this.review;
+            firearm.calibre = this.calibre;
+            firearm.fireRate = this.fireRate;
+            firearm.armourDamage = this.armourDamage;
+            firearm.bodyDamage = this.bodyDamage;
+            firearm.modifications = this.modifications == null ? new ArrayList<>() : this.modifications;
+            return firearm;
+        }
+    }
 }
 

src/main/java/com/onixbyte/deltaforceguide/domain/entity/Modification.java

@@ -1,22 +1,17 @@
 package com.onixbyte.deltaforceguide.domain.entity;
 
 import io.hypersistence.utils.hibernate.type.json.JsonType;
-import jakarta.persistence.Column;
-import jakarta.persistence.Entity;
-import jakarta.persistence.FetchType;
-import jakarta.persistence.ForeignKey;
-import jakarta.persistence.GeneratedValue;
-import jakarta.persistence.GenerationType;
-import jakarta.persistence.Id;
-import jakarta.persistence.Index;
-import jakarta.persistence.JoinColumn;
-import jakarta.persistence.ManyToOne;
-import jakarta.persistence.Table;
+import jakarta.persistence.*;
 import org.hibernate.annotations.Type;
 
 import java.util.ArrayList;
 import java.util.List;
 
+/**
+ * Entity representing a firearm modification or build configuration.
+ *
+ * @author zihluwang
+ */
 @Entity
 @Table(
     name = "modification",
@@ -41,9 +36,13 @@ public class Modification {
     private String code;
 
     @Type(JsonType.class)
-    @Column(name = "tags", columnDefinition = "json")
+    @Column(name = "tags", columnDefinition = "jsonb")
     private List<String> tags = new ArrayList<>();
 
+    @Type(JsonType.class)
+    @Column(name = "accessories", columnDefinition = "jsonb")
+    private List<Accessory> accessories = new ArrayList<>();
+
     @Column(name = "note", columnDefinition = "TEXT")
     private String note;
 
@@ -93,6 +92,22 @@ public class Modification {
         this.tags = tags;
     }
 
+    public List<Accessory> getAccessories() {
+        return accessories;
+    }
+
+    public void setAccessories(List<Accessory> accessories) {
+        this.accessories = accessories;
+    }
+
+    public void addAccessory(Accessory modificationAccessory) {
+        this.accessories.add(modificationAccessory);
+    }
+
+    public void removeAccessory(Accessory modificationAccessory) {
+        this.accessories.remove(modificationAccessory);
+    }
+
     public String getNote() {
         return note;
     }
@@ -116,5 +131,81 @@ public class Modification {
     public void setVideoUrl(String videoUrl) {
         this.videoUrl = videoUrl;
     }
+
+    public static Builder builder() {
+        return new Builder();
+    }
+
+    public static class Builder {
+
+        private Long id;
+        private Firearm firearm;
+        private String name;
+        private String code;
+        private List<String> tags;
+        private List<Accessory> accessories;
+        private String note;
+        private String author;
+        private String videoUrl;
+
+        public Builder id(Long id) {
+            this.id = id;
+            return this;
+        }
+
+        public Builder firearm(Firearm firearm) {
+            this.firearm = firearm;
+            return this;
+        }
+
+        public Builder name(String name) {
+            this.name = name;
+            return this;
+        }
+
+        public Builder code(String code) {
+            this.code = code;
+            return this;
+        }
+
+        public Builder tags(List<String> tags) {
+            this.tags = tags;
+            return this;
+        }
+
+        public Builder accessories(List<Accessory> accessories) {
+            this.accessories = accessories;
+            return this;
+        }
+
+        public Builder note(String note) {
+            this.note = note;
+            return this;
+        }
+
+        public Builder author(String author) {
+            this.author = author;
+            return this;
+        }
+
+        public Builder videoUrl(String videoUrl) {
+            this.videoUrl = videoUrl;
+            return this;
+        }
+
+        public Modification build() {
+            Modification modification = new Modification();
+            modification.id = this.id;
+            modification.firearm = this.firearm;
+            modification.name = this.name;
+            modification.code = this.code;
+            modification.tags = this.tags == null ? new ArrayList<>() : this.tags;
+            modification.accessories = this.accessories == null ? new ArrayList<>() : this.accessories;
+            modification.note = this.note;
+            modification.author = this.author;
+            modification.videoUrl = this.videoUrl;
+            return modification;
+        }
+    }
 }
 

src/main/java/com/onixbyte/deltaforceguide/domain/entity/Tuning.java

@@ -0,0 +1,50 @@
+package com.onixbyte.deltaforceguide.domain.entity;
+
+import java.util.Objects;
+
+/**
+ * Entity representing a tuning adjustment for an accessory, stored as JSONB within Accessory.
+ *
+ * @author zihluwang
+ */
+public class Tuning {
+
+    private String tuningName;
+    private Double tuningValue;
+
+    public Tuning() {
+    }
+
+    public String getTuningName() {
+        return tuningName;
+    }
+
+    public void setTuningName(String tuningName) {
+        this.tuningName = tuningName;
+    }
+
+    public Double getTuningValue() {
+        return tuningValue;
+    }
+
+    public void setTuningValue(Double tuningValue) {
+        this.tuningValue = tuningValue;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (!(o instanceof Tuning tuning)) {
+            return false;
+        }
+        return Objects.equals(tuningName, tuning.tuningName)
+                && Objects.equals(tuningValue, tuning.tuningValue);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(tuningName, tuningValue);
+    }
+}

src/main/java/com/onixbyte/deltaforceguide/domain/entity/User.java

@@ -0,0 +1,119 @@
+package com.onixbyte.deltaforceguide.domain.entity;
+
+import jakarta.persistence.CascadeType;
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.OneToMany;
+import jakarta.persistence.Table;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Entity representing an application user with authentication credentials.
+ *
+ * @author zihluwang
+ */
+@Entity
+@Table(name = "app_user")
+public class User {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(name = "username", nullable = false)
+    private String username;
+
+    @Column(name = "email", nullable = false)
+    private String email;
+
+    @OneToMany(mappedBy = "user", cascade = CascadeType.ALL, orphanRemoval = true)
+    private List<UserCredential> credentials = new ArrayList<>();
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getUsername() {
+        return username;
+    }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+
+    public List<UserCredential> getCredentials() {
+        return credentials;
+    }
+
+    public void setCredentials(List<UserCredential> credentials) {
+        this.credentials = credentials;
+    }
+
+    public void addCredential(UserCredential credential) {
+        this.credentials.add(credential);
+        credential.setUser(this);
+    }
+
+    public void removeCredential(UserCredential credential) {
+        this.credentials.remove(credential);
+        credential.setUser(null);
+    }
+
+    public static Builder builder() {
+        return new Builder();
+    }
+
+    public static class Builder {
+
+        private Long id;
+        private String username;
+        private String email;
+        private List<UserCredential> credentials;
+
+        public Builder id(Long id) {
+            this.id = id;
+            return this;
+        }
+
+        public Builder username(String username) {
+            this.username = username;
+            return this;
+        }
+
+        public Builder email(String email) {
+            this.email = email;
+            return this;
+        }
+
+        public Builder credentials(List<UserCredential> credentials) {
+            this.credentials = credentials;
+            return this;
+        }
+
+        public User build() {
+            User user = new User();
+            user.id = this.id;
+            user.username = this.username;
+            user.email = this.email;
+            user.credentials = this.credentials == null ? new ArrayList<>() : this.credentials;
+            return user;
+        }
+    }
+}

src/main/java/com/onixbyte/deltaforceguide/domain/entity/UserCredential.java

@@ -0,0 +1,143 @@
+package com.onixbyte.deltaforceguide.domain.entity;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.AttributeOverride;
+import jakarta.persistence.AttributeOverrides;
+import jakarta.persistence.EmbeddedId;
+import jakarta.persistence.Entity;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.ForeignKey;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.MapsId;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.Table;
+
+/**
+ * Entity representing a user credential linked to an authentication provider.
+ *
+ * @author zihluwang
+ */
+@Entity
+@Table(name = "app_user_credential")
+public class UserCredential {
+
+	@EmbeddedId
+	@AttributeOverrides({
+		@AttributeOverride(name = "userId", column = @Column(name = "user_id")),
+		@AttributeOverride(name = "provider", column = @Column(name = "provider"))
+	})
+	private UserCredentialId id = new UserCredentialId();
+
+	@MapsId("userId")
+	@ManyToOne(fetch = FetchType.LAZY, optional = false)
+	@JoinColumn(name = "user_id", nullable = false, foreignKey = @ForeignKey(name = "fk_user_credential_user"))
+	private User user;
+
+	@Column(name = "credential", nullable = false)
+	private String credential;
+
+	public UserCredentialId getId() {
+		return id;
+	}
+
+	public void setId(UserCredentialId id) {
+		this.id = id;
+	}
+
+	public User getUser() {
+		return user;
+	}
+
+	public void setUser(User user) {
+		this.user = user;
+		if (this.id == null) {
+			this.id = new UserCredentialId();
+		}
+		this.id.setUserId(user == null ? null : user.getId());
+	}
+
+	public Long getUserId() {
+		return id == null ? null : id.getUserId();
+	}
+
+	public void setUserId(Long userId) {
+		if (this.id == null) {
+			this.id = new UserCredentialId();
+		}
+		this.id.setUserId(userId);
+	}
+
+	public String getProvider() {
+		return id == null ? null : id.getProvider();
+	}
+
+	public void setProvider(String provider) {
+		if (this.id == null) {
+			this.id = new UserCredentialId();
+		}
+		this.id.setProvider(provider);
+	}
+
+	public String getCredential() {
+		return credential;
+	}
+
+	public void setCredential(String credential) {
+		this.credential = credential;
+	}
+
+	public static Builder builder() {
+		return new Builder();
+	}
+
+	public static class Builder {
+
+		private UserCredentialId id;
+		private User user;
+		private Long userId;
+		private String provider;
+		private String credential;
+
+		public Builder id(UserCredentialId id) {
+			this.id = id;
+			return this;
+		}
+
+		public Builder user(User user) {
+			this.user = user;
+			return this;
+		}
+
+		public Builder userId(Long userId) {
+			this.userId = userId;
+			return this;
+		}
+
+		public Builder provider(String provider) {
+			this.provider = provider;
+			return this;
+		}
+
+		public Builder credential(String credential) {
+			this.credential = credential;
+			return this;
+		}
+
+		public UserCredential build() {
+			UserCredential userCredential = new UserCredential();
+			userCredential.id = this.id == null ? new UserCredentialId() : this.id;
+			userCredential.user = this.user;
+			if (this.user != null) {
+				userCredential.id.setUserId(this.user.getId());
+			}
+			if (this.userId != null) {
+				userCredential.id.setUserId(this.userId);
+			}
+			if (this.provider != null) {
+				userCredential.id.setProvider(this.provider);
+			}
+			userCredential.credential = this.credential;
+			return userCredential;
+		}
+	}
+}

src/main/java/com/onixbyte/deltaforceguide/domain/entity/UserCredentialId.java

@@ -0,0 +1,81 @@
+package com.onixbyte.deltaforceguide.domain.entity;
+
+import jakarta.persistence.Embeddable;
+
+import java.io.Serializable;
+import java.util.Objects;
+
+/**
+ * Composite key for the UserCredential entity, combining user ID and provider.
+ *
+ * @author zihluwang
+ */
+@Embeddable
+public class UserCredentialId implements Serializable {
+
+    private Long userId;
+
+    private String provider;
+
+    public Long getUserId() {
+        return userId;
+    }
+
+    public void setUserId(Long userId) {
+        this.userId = userId;
+    }
+
+    public String getProvider() {
+        return provider;
+    }
+
+    public void setProvider(String provider) {
+        this.provider = provider;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        UserCredentialId that = (UserCredentialId) o;
+        return Objects.equals(userId, that.userId) && Objects.equals(provider, that.provider);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(userId, provider);
+    }
+
+    public static Builder builder() {
+        return new Builder();
+    }
+
+    public static class Builder {
+
+        private Long userId;
+        private String provider;
+
+        public Builder userId(Long userId) {
+            this.userId = userId;
+            return this;
+        }
+
+        public Builder provider(String provider) {
+            this.provider = provider;
+            return this;
+        }
+
+        public UserCredentialId build() {
+            UserCredentialId id = new UserCredentialId();
+            id.userId = this.userId;
+            id.provider = this.provider;
+            return id;
+        }
+    }
+}
+
+

src/main/java/com/onixbyte/deltaforceguide/enumeration/FirearmType.java

@@ -1,5 +1,11 @@
 package com.onixbyte.deltaforceguide.enumeration;
 
+/**
+ * Enumeration of firearm types in the Delta Force game.
+ * Each type is associated with an integer code used for database persistence.
+ *
+ * @author zihluwang
+ */
 public enum FirearmType {
 
     RIFLE(0),
@@ -21,6 +27,13 @@ public enum FirearmType {
         return code;
     }
 
+    /**
+     * Resolve a FirearmType from its integer code.
+     *
+      * @param code the integer code, may be null
+     * @return the corresponding FirearmType, or null if the code is null
+     * @throws IllegalArgumentException if the code does not match any known type
+     */
     public static FirearmType fromCode(Integer code) {
         if (code == null) {
             return null;

src/main/java/com/onixbyte/deltaforceguide/exeption/BizException.java

@@ -0,0 +1,40 @@
+package com.onixbyte.deltaforceguide.exeption;
+
+import org.springframework.http.HttpStatus;
+
+/**
+ * Custom runtime exception that carries an HTTP status code for API error responses.
+ *
+ * @author zihluwang
+ */
+public class BizException extends RuntimeException {
+
+    /**
+     * The HTTP status code associated with this business exception.
+     * <p>
+     * This status code indicates the appropriate HTTP response status that should be returned to
+     * clients when this exception occurs. It enables consistent error handling across
+     * REST API endpoints.
+     */
+    private final HttpStatus status;
+
+    public BizException(String message) {
+        super(message);
+        this.status = HttpStatus.INTERNAL_SERVER_ERROR;
+    }
+
+    public BizException(HttpStatus status, String message) {
+        super(message);
+        this.status = status;
+    }
+
+    /**
+     * Returns the HTTP status code associated with this business exception.
+     *
+     * @return the HTTP status code that should be used in the error response
+     */
+    public HttpStatus getStatus() {
+        return status;
+    }
+}
+

src/main/java/com/onixbyte/deltaforceguide/filter/TokenAuthenticationFilter.java

@@ -0,0 +1,113 @@
+package com.onixbyte.deltaforceguide.filter;
+
+import com.auth0.jwt.exceptions.JWTVerificationException;
+import com.onixbyte.deltaforceguide.client.TokenClient;
+import com.onixbyte.deltaforceguide.exeption.BizException;
+import com.onixbyte.deltaforceguide.manager.UserManager;
+import com.onixbyte.deltaforceguide.security.authentication.UsernamePasswordAuthentication;
+import com.onixbyte.deltaforceguide.service.CookieService;
+import jakarta.servlet.FilterChain;
+import jakarta.servlet.ServletException;
+import jakarta.servlet.http.Cookie;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import org.jspecify.annotations.NonNull;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.security.core.context.SecurityContextHolder;
+import org.springframework.stereotype.Component;
+import org.springframework.web.filter.OncePerRequestFilter;
+import org.springframework.web.servlet.HandlerExceptionResolver;
+import org.springframework.web.util.WebUtils;
+
+import java.io.IOException;
+import java.time.Duration;
+import java.time.Instant;
+import java.util.Objects;
+import java.util.Optional;
+
+/**
+ * Servlet filter that extracts and validates JWT tokens from httpOnly cookies for each request.
+ *
+ * @author zihluwang
+ */
+@Component
+public class TokenAuthenticationFilter extends OncePerRequestFilter {
+
+    private final static Logger log = LoggerFactory.getLogger(TokenAuthenticationFilter.class);
+    private static final Duration ACCESS_TOKEN_RENEW_THRESHOLD = Duration.ofMinutes(5);
+
+    private final UserManager userManager;
+    private final TokenClient tokenClient;
+    private final CookieService cookieService;
+    private final HandlerExceptionResolver handlerExceptionResolver;
+
+    public TokenAuthenticationFilter(
+            UserManager userManager,
+            TokenClient tokenClient,
+            CookieService cookieService,
+            HandlerExceptionResolver handlerExceptionResolver
+    ) {
+        this.userManager = userManager;
+        this.tokenClient = tokenClient;
+        this.cookieService = cookieService;
+        this.handlerExceptionResolver = handlerExceptionResolver;
+    }
+
+    /**
+     * Extracts JWT from httpOnly cookie, validates it, and sets the security context.
+     *
+     * @param request the HTTP request
+     * @param response the HTTP response
+     * @param filterChain the filter chain
+     */
+    @Override
+    protected void doFilterInternal(
+            @NonNull HttpServletRequest request,
+            @NonNull HttpServletResponse response,
+            @NonNull FilterChain filterChain
+    ) throws ServletException, IOException {
+        var token = Optional.ofNullable(WebUtils.getCookie(request, "AccessToken"))
+                .map(Cookie::getValue)
+                .orElse(null);
+        if (Objects.isNull(token) || token.isBlank()) {
+            filterChain.doFilter(request, response);
+            return;
+        }
+
+        try {
+            var decodedToken = tokenClient.verifyToken(token);
+            var username = decodedToken.getSubject();
+
+            var userWrapper = userManager.findByUsername(username);
+            if (userWrapper.isEmpty()) {
+                throw new BizException(HttpStatus.UNAUTHORIZED, "登录已过期，请重新登录");
+            }
+
+            var user = userWrapper.get();
+            var authentication = UsernamePasswordAuthentication.authenticated(user);
+            SecurityContextHolder.getContext().setAuthentication(authentication);
+
+            if (shouldRenew(decodedToken.getExpiresAt().toInstant())) {
+                var renewedToken = tokenClient.generateToken(user);
+                var renewedTokenCookie = cookieService.buildCookie("AccessToken", renewedToken);
+                response.addHeader(HttpHeaders.SET_COOKIE, renewedTokenCookie.toString());
+            }
+
+            filterChain.doFilter(request, response);
+        } catch (JWTVerificationException e) {
+            log.error("JWT verification failed.", e);
+            handlerExceptionResolver.resolveException(request, response, null,
+                    new BizException(HttpStatus.UNAUTHORIZED, "登录已过期，请重新登录"));
+        } catch (BizException e) {
+            handlerExceptionResolver.resolveException(request, response, null, e);
+        }
+    }
+
+    private boolean shouldRenew(Instant expiresAt) {
+        return Duration.between(Instant.now(), expiresAt).compareTo(ACCESS_TOKEN_RENEW_THRESHOLD) < 0;
+    }
+}
+

src/main/java/com/onixbyte/deltaforceguide/filter/WebhookFilter.java

@@ -0,0 +1,22 @@
+package com.onixbyte.deltaforceguide.filter;
+
+import com.onixbyte.deltaforceguide.wrapper.RepeatedlyReadRequestWrapper;
+import jakarta.servlet.*;
+import jakarta.servlet.http.HttpServletRequest;
+import org.springframework.stereotype.Component;
+
+import java.io.IOException;
+
+@Component
+public class WebhookFilter implements Filter {
+    @Override
+    public void doFilter(
+            ServletRequest request,
+            ServletResponse response,
+            FilterChain chain
+    ) throws IOException, ServletException {
+        var httpRequest = (HttpServletRequest) request;
+        var wrappedRequest = new RepeatedlyReadRequestWrapper(httpRequest);
+        chain.doFilter(wrappedRequest, response);
+    }
+}

src/main/java/com/onixbyte/deltaforceguide/interceptor/GitHubWebhookInterceptor.java

@@ -0,0 +1,83 @@
+package com.onixbyte.deltaforceguide.interceptor;
+
+import com.onixbyte.crypto.util.CryptoUtil;
+import com.onixbyte.deltaforceguide.exeption.BizException;
+import com.onixbyte.deltaforceguide.manager.WebhookManager;
+import com.onixbyte.deltaforceguide.shared.GitHubWebhookHeader;
+import com.onixbyte.deltaforceguide.wrapper.RepeatedlyReadRequestWrapper;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import org.jspecify.annotations.NonNull;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Component;
+import org.springframework.web.servlet.HandlerInterceptor;
+
+import java.nio.charset.StandardCharsets;
+import java.security.InvalidKeyException;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+
+/**
+ * Verifies GitHub webhook requests by validating the {@code X-Hub-Signature-256}
+ * header against the configured secret using HMAC-SHA256.
+ *
+ * <p>Verification is skipped when no secret is configured. The signature format is
+ * {@code sha256=<hex-digest>} as documented by GitHub.
+ */
+@Component
+public class GitHubWebhookInterceptor implements HandlerInterceptor {
+
+    private static final Logger log = LoggerFactory.getLogger(GitHubWebhookInterceptor.class);
+
+    private final WebhookManager webhookManager;
+
+    public GitHubWebhookInterceptor(WebhookManager webhookManager) {
+        this.webhookManager = webhookManager;
+    }
+
+    @Override
+    public boolean preHandle(
+            @NonNull HttpServletRequest request,
+            @NonNull HttpServletResponse response,
+            @NonNull Object handler
+    ) {
+        if (!(request instanceof RepeatedlyReadRequestWrapper req)) {
+            throw new BizException(HttpStatus.INTERNAL_SERVER_ERROR,
+                    "Request body is not readable");
+        }
+
+        var secret = webhookManager.secret();
+        if (secret == null || secret.isBlank()) {
+            log.debug("No GitHub webhook secret configured, skipping signature verification");
+            return true;
+        }
+
+        var signatureHeader = req.getHeader(GitHubWebhookHeader.SIGNATURE_256);
+        if (signatureHeader == null || signatureHeader.isBlank()) {
+            log.warn("Missing {} header from ip={}",
+                    GitHubWebhookHeader.SIGNATURE_256, request.getRemoteAddr());
+            throw new BizException(HttpStatus.UNAUTHORIZED,
+                    "Missing webhook signature header");
+        }
+
+        var body = req.getBodyString();
+        try {
+            var computed = "sha256=" + CryptoUtil.hmacSha256(body, secret);
+
+            if (!MessageDigest.isEqual(
+                    computed.getBytes(StandardCharsets.UTF_8),
+                    signatureHeader.getBytes(StandardCharsets.UTF_8))) {
+                log.warn("Invalid webhook signature from ip={}", request.getRemoteAddr());
+                throw new BizException(HttpStatus.UNAUTHORIZED, "Invalid webhook signature");
+            }
+
+            return true;
+        } catch (NoSuchAlgorithmException | InvalidKeyException e) {
+            log.error("Failed to compute HMAC-SHA256", e);
+            throw new BizException(HttpStatus.INTERNAL_SERVER_ERROR,
+                    "Failed to verify webhook signature");
+        }
+    }
+}

src/main/java/com/onixbyte/deltaforceguide/interceptor/TrafficInterceptor.java

@@ -0,0 +1,46 @@
+package com.onixbyte.deltaforceguide.interceptor;
+
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import org.jspecify.annotations.NonNull;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.stereotype.Component;
+import org.springframework.web.servlet.HandlerInterceptor;
+
+@Component
+public class TrafficInterceptor implements HandlerInterceptor {
+
+    private static final Logger log = LoggerFactory.getLogger(TrafficInterceptor.class);
+
+    @Override
+    public boolean preHandle(
+            @NonNull HttpServletRequest request,
+            @NonNull HttpServletResponse response,
+            @NonNull Object handler
+    ) {
+        var ip = resolveClientIp(request);
+        var method = request.getMethod();
+        var uri = request.getRequestURI();
+        var query = request.getQueryString();
+        var contentType = request.getContentType();
+        var contentLength = request.getContentLength();
+        var userAgent = request.getHeader("User-Agent");
+
+        log.debug("Request method={}, uri={}, query={}, ip={}, content-type={}, content-length={}, user-agent={}",
+                method, uri, query, ip, contentType, contentLength, userAgent);
+        return true;
+    }
+
+    private String resolveClientIp(HttpServletRequest request) {
+        var xForwardedFor = request.getHeader("X-Forwarded-For");
+        if (xForwardedFor != null && !xForwardedFor.isBlank()) {
+            return xForwardedFor.split(",")[0].trim();
+        }
+        var xRealIp = request.getHeader("X-Real-IP");
+        if (xRealIp != null && !xRealIp.isBlank()) {
+            return xRealIp.trim();
+        }
+        return request.getRemoteAddr();
+    }
+}

src/main/java/com/onixbyte/deltaforceguide/manager/AppManager.java

@@ -0,0 +1,27 @@
+package com.onixbyte.deltaforceguide.manager;
+
+import com.onixbyte.deltaforceguide.properties.AppProperties;
+import org.springframework.stereotype.Component;
+
+@Component
+public class AppManager {
+
+    private final AppProperties appProperties;
+
+    public AppManager(AppProperties appProperties) {
+        this.appProperties = appProperties;
+    }
+
+    /**
+     * Retrieves the application version.
+     *
+     * @return the version string of this application
+     */
+    public String getVersion() {
+        return "v%s-%s by @%s".formatted(
+                appProperties.version(),
+                appProperties.channel(),
+                appProperties.vendor()
+        );
+    }
+}

src/main/java/com/onixbyte/deltaforceguide/manager/CookieManager.java

@@ -0,0 +1,42 @@
+package com.onixbyte.deltaforceguide.manager;
+
+import com.onixbyte.deltaforceguide.properties.CookieProperties;
+import org.springframework.boot.web.server.Cookie;
+import org.springframework.stereotype.Component;
+
+import java.time.Duration;
+
+/**
+ * Manager providing cookie construction operations with configurable properties.
+ *
+ * @author zihluwang
+ */
+@Component
+public class CookieManager {
+
+    private final CookieProperties cookieProperties;
+
+    public CookieManager(CookieProperties cookieProperties) {
+        this.cookieProperties = cookieProperties;
+    }
+
+    public Boolean getHttpOnly() {
+        return cookieProperties.httpOnly();
+    }
+
+    public Boolean getSecure() {
+        return cookieProperties.secure();
+    }
+
+    public Cookie.SameSite getSameSite() {
+        return cookieProperties.sameSite();
+    }
+
+    public String getPath() {
+        return cookieProperties.path();
+    }
+
+    public Duration getMaxAge() {
+        return cookieProperties.maxAge();
+    }
+}

src/main/java/com/onixbyte/deltaforceguide/manager/DailyPasswordManager.java

@@ -0,0 +1,85 @@
+package com.onixbyte.deltaforceguide.manager;
+
+import com.fasterxml.jackson.databind.DeserializationFeature;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.PropertyNamingStrategies;
+import com.onixbyte.deltaforceguide.domain.dto.DailyPasswordResponse;
+import com.onixbyte.deltaforceguide.exeption.BizException;
+import com.onixbyte.deltaforceguide.shared.JacksonModules;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.data.redis.core.RedisTemplate;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
+import org.springframework.stereotype.Component;
+import org.springframework.web.client.RestClient;
+
+import java.time.Duration;
+import java.time.LocalDate;
+import java.util.Objects;
+
+/**
+ * Manager for daily password data access and caching coordination.
+ *
+ * @author zihluwang
+ */
+@Component
+public class DailyPasswordManager {
+
+    private static final String CACHE_KEY_PREFIX = "daily-password:";
+
+    private final RestClient restClient;
+    private final RedisTemplate<String, Object> redisTemplate;
+
+    @Autowired
+    public DailyPasswordManager(
+            RestClient.Builder restClientBuilder,
+            RedisTemplate<String, Object> redisTemplate
+    ) {
+        var snakeCaseMapper = new ObjectMapper();
+        snakeCaseMapper.setPropertyNamingStrategy(
+                PropertyNamingStrategies.SnakeCaseStrategy.INSTANCE);
+        snakeCaseMapper.configure(
+                DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
+        snakeCaseMapper.registerModule(JacksonModules.DATE_TIME_MODULE);
+
+        this.restClient = restClientBuilder
+                .baseUrl("https://tmini.net/api")
+                .messageConverters(converters -> {
+                    converters.removeIf(
+                            MappingJackson2HttpMessageConverter.class::isInstance);
+                    converters.add(
+                            new MappingJackson2HttpMessageConverter(snakeCaseMapper));
+                })
+                .build();
+        this.redisTemplate = redisTemplate;
+    }
+
+    /**
+     * Retrieves the daily password from cache or generates a new one.
+     * @return the daily password response
+     */
+    public DailyPasswordResponse getDailyPassword() {
+        var key = CACHE_KEY_PREFIX + LocalDate.now();
+
+        var cached = redisTemplate.opsForValue().get(key);
+        if (cached != null) {
+            return (DailyPasswordResponse) cached;
+        }
+
+        var response = restClient.get()
+                .uri((uriBuilder) -> uriBuilder
+                        .path("/sjzmm")
+                        .queryParam("ckey", "")
+                        .queryParam("type", "json")
+                        .build())
+                .retrieve()
+                .body(DailyPasswordResponse.class);
+
+        if (Objects.isNull(response)) {
+            throw new BizException(HttpStatus.INTERNAL_SERVER_ERROR, "暂无每日密码数据。");
+        }
+
+        redisTemplate.opsForValue().set(key, response, Duration.ofDays(1L));
+        return response;
+    }
+}

src/main/java/com/onixbyte/deltaforceguide/manager/ModificationManager.java

@@ -0,0 +1,130 @@
+package com.onixbyte.deltaforceguide.manager;
+
+import com.onixbyte.deltaforceguide.domain.entity.Accessory;
+import com.onixbyte.deltaforceguide.domain.entity.Firearm;
+import com.onixbyte.deltaforceguide.domain.entity.Modification;
+import com.onixbyte.deltaforceguide.domain.entity.Tuning;
+import com.onixbyte.deltaforceguide.domain.dto.AccessoryRequest;
+import com.onixbyte.deltaforceguide.domain.dto.ModificationRequest;
+import com.onixbyte.deltaforceguide.domain.dto.ModificationResponse;
+import com.onixbyte.deltaforceguide.domain.dto.TuningRequest;
+import com.onixbyte.deltaforceguide.repository.FirearmRepository;
+import com.onixbyte.deltaforceguide.repository.ModificationRepository;
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Component;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.web.server.ResponseStatusException;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Map;
+
+@Component
+public class ModificationManager {
+
+    private final ModificationRepository modificationRepository;
+    private final FirearmRepository firearmRepository;
+
+    public ModificationManager(
+            ModificationRepository modificationRepository,
+            FirearmRepository firearmRepository
+    ) {
+        this.modificationRepository = modificationRepository;
+        this.firearmRepository = firearmRepository;
+    }
+
+    @Transactional
+    public ModificationResponse create(ModificationRequest request) {
+        var firearm = firearmRepository.findById(request.firearmId())
+                .orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND,
+                        "Firearm not found: " + request.firearmId()));
+        var modification = toEntity(request, firearm);
+        return ModificationResponse.from(modificationRepository.save(modification));
+    }
+
+    @Transactional
+    public List<ModificationResponse> batchCreate(List<ModificationRequest> requests) {
+        var firearmIds = requests.stream()
+                .map(ModificationRequest::firearmId)
+                .collect(java.util.stream.Collectors.toCollection(LinkedHashSet::new));
+
+        Map<Long, Firearm> firearmMap = new HashMap<>();
+        firearmRepository.findAllById(firearmIds)
+                .forEach(firearm -> firearmMap.put(firearm.getId(), firearm));
+
+        if (firearmMap.size() != firearmIds.size()) {
+            var missing = firearmIds.stream()
+                    .filter((id) -> !firearmMap.containsKey(id))
+                    .toList();
+            throw new ResponseStatusException(HttpStatus.NOT_FOUND,
+                    "Firearm not found: " + missing);
+        }
+
+        var modifications = requests.stream()
+                .map(req -> toEntity(req, firearmMap.get(req.firearmId())))
+                .toList();
+        return modificationRepository.saveAll(modifications)
+                .stream()
+                .map(ModificationResponse::from)
+                .toList();
+    }
+
+    public Long resolveFirearmId(Long firearmId, String firearmName) {
+        if (firearmId != null) {
+            return firearmId;
+        }
+        if (firearmName == null || firearmName.isBlank()) {
+            return null;
+        }
+        var matches = firearmRepository.findByName(firearmName);
+        if (matches.isEmpty()) {
+            throw new ResponseStatusException(HttpStatus.NOT_FOUND,
+                    "Firearm not found by name: " + firearmName);
+        }
+        return matches.getFirst().getId();
+    }
+
+    private Modification toEntity(ModificationRequest request, Firearm firearm) {
+        return Modification.builder()
+                .firearm(firearm)
+                .name(request.name())
+                .code(request.code())
+                .tags(request.tags())
+                .accessories(toAccessories(request.accessories()))
+                .note(request.note())
+                .author(request.author())
+                .videoUrl(request.videoUrl())
+                .build();
+    }
+
+    private List<Accessory> toAccessories(List<AccessoryRequest> requests) {
+        if (requests == null) {
+            return new ArrayList<>();
+        }
+        return requests.stream().map(this::toAccessory).toList();
+    }
+
+    private Accessory toAccessory(AccessoryRequest request) {
+        var accessory = new Accessory();
+        accessory.setSlotName(request.slotName());
+        accessory.setAccessoryName(request.accessoryName());
+        accessory.setTunings(toTunings(request.tunings()));
+        return accessory;
+    }
+
+    private List<Tuning> toTunings(List<TuningRequest> requests) {
+        if (requests == null) {
+            return new ArrayList<>();
+        }
+        return requests.stream().map(this::toTuning).toList();
+    }
+
+    private Tuning toTuning(TuningRequest request) {
+        var tuning = new Tuning();
+        tuning.setTuningName(request.tuningName());
+        tuning.setTuningValue(request.tuningValue());
+        return tuning;
+    }
+}

src/main/java/com/onixbyte/deltaforceguide/manager/UserCredentialManager.java

@@ -0,0 +1,76 @@
+package com.onixbyte.deltaforceguide.manager;
+
+import com.onixbyte.deltaforceguide.domain.entity.UserCredential;
+import com.onixbyte.deltaforceguide.repository.UserCredentialRepository;
+import org.springframework.stereotype.Component;
+
+import java.util.List;
+import java.util.Optional;
+
+/**
+ * Manager for user credential persistence and authentication data access.
+ *
+ * @author zihluwang
+ */
+@Component
+public class UserCredentialManager {
+
+    private final UserCredentialRepository userCredentialRepository;
+
+    public UserCredentialManager(UserCredentialRepository userCredentialRepository) {
+        this.userCredentialRepository = userCredentialRepository;
+    }
+
+    /**
+     * Finds all credentials belonging to a specific user.
+     *
+     * @param userId the user ID
+     * @return list of matching credentials
+     */
+    public List<UserCredential> findAllByUserId(Long userId) {
+        return userCredentialRepository.findAllByUserId(userId);
+    }
+
+    /**
+     * Finds a credential for a specific user and provider combination.
+     *
+     * @param userId the user ID
+     * @param provider the authentication provider
+     * @return the matching credential, if found
+     */
+    public Optional<UserCredential> findByUserIdAndProvider(Long userId, String provider) {
+        return userCredentialRepository.findByUserIdAndProvider(userId, provider);
+    }
+
+    /**
+     * Persists a new or updated credential.
+     *
+     * @param userCredential the credential to save
+     * @return the saved credential
+     */
+    public UserCredential save(UserCredential userCredential) {
+        return userCredentialRepository.save(userCredential);
+    }
+
+    /**
+     * Deletes a credential for a specific user and provider.
+     *
+     * @param userId the user ID
+     * @param provider the authentication provider
+     */
+    public void deleteByUserIdAndProvider(Long userId, String provider) {
+        userCredentialRepository.deleteByUserIdAndProvider(userId, provider);
+    }
+
+    /**
+     * Deletes all credentials belonging to a user.
+     *
+     * @param userId the user ID
+     */
+    public void deleteAllByUserId(Long userId) {
+        userCredentialRepository.deleteAllByUserId(userId);
+    }
+}
+
+
+

src/main/java/com/onixbyte/deltaforceguide/manager/UserManager.java

@@ -0,0 +1,87 @@
+package com.onixbyte.deltaforceguide.manager;
+
+import com.onixbyte.deltaforceguide.domain.entity.User;
+import com.onixbyte.deltaforceguide.repository.UserRepository;
+import org.springframework.stereotype.Component;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.List;
+import java.util.Optional;
+
+/**
+ * Manager for user entity persistence and query operations.
+ *
+ * @author zihluwang
+ */
+@Component
+public class UserManager {
+
+    private final UserRepository userRepository;
+
+    public UserManager(UserRepository userRepository) {
+        this.userRepository = userRepository;
+    }
+
+    /**
+     * Finds a user by their ID.
+     *
+     * @param id the user ID
+     * @return the matching user, if found
+     */
+    public Optional<User> findById(Long id) {
+        return userRepository.findById(id);
+    }
+
+    /**
+     * Retrieves all registered users.
+     * @return list of all users
+     */
+    public List<User> findAll() {
+        return userRepository.findAll();
+    }
+
+    /**
+     * Finds a user by their username.
+     *
+     * @param username the username to search for
+     * @return the matching user, if found
+     */
+    public Optional<User> findByUsername(String username) {
+        return userRepository.findByUsername(username);
+    }
+
+    @Transactional(readOnly = true)
+    public Optional<User> findByEmail(String email) {
+        return userRepository.findByEmail(email);
+    }
+
+    /**
+     * Persists a new or updated user.
+     *
+     * @param user the user to save
+     * @return the saved user
+     */
+    public User save(User user) {
+        return userRepository.save(user);
+    }
+
+    /**
+     * Deletes a user by their ID.
+     *
+     * @param id the user ID to delete
+     */
+    public void deleteById(Long id) {
+        userRepository.deleteById(id);
+    }
+
+    /**
+     * Finds a user by their username or email address.
+     *
+     * @param principal the username or email to search for
+     * @return the matching user, if found
+     */
+    public Optional<User> findByUsernameOrEmail(String principal) {
+        return userRepository.findByUsernameOrEmail(principal);
+    }
+}
+

src/main/java/com/onixbyte/deltaforceguide/manager/WebhookManager.java

@@ -0,0 +1,24 @@
+package com.onixbyte.deltaforceguide.manager;
+
+import com.onixbyte.deltaforceguide.properties.GitHubWebhookProperties;
+import org.springframework.stereotype.Component;
+
+import java.util.List;
+
+@Component
+public class WebhookManager {
+
+    private final GitHubWebhookProperties gitHubWebhookProperties;
+
+    public WebhookManager(GitHubWebhookProperties gitHubWebhookProperties) {
+        this.gitHubWebhookProperties = gitHubWebhookProperties;
+    }
+
+    public String secret() {
+        return gitHubWebhookProperties.secret();
+    }
+
+    public List<String> allowedUsers() {
+        return gitHubWebhookProperties.allowedUsers();
+    }
+}

src/main/java/com/onixbyte/deltaforceguide/properties/AppProperties.java

@@ -0,0 +1,11 @@
+package com.onixbyte.deltaforceguide.properties;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+
+@ConfigurationProperties(prefix = "app.common")
+public record AppProperties(
+        String version,
+        String channel,
+        String vendor
+) {
+}

src/main/java/com/onixbyte/deltaforceguide/properties/CookieProperties.java

@@ -0,0 +1,27 @@
+package com.onixbyte.deltaforceguide.properties;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.boot.context.properties.bind.DefaultValue;
+import org.springframework.boot.web.server.Cookie;
+
+import java.time.Duration;
+
+/**
+ * Configuration properties for HTTP cookies used in authentication, prefixed with "app.cookie".
+ *
+ * @param httpOnly  whether the cookie is httpOnly
+ * @param secure    whether the cookie is secure
+ * @param path      the cookie path
+ * @param maxAge    the maximum age of the cookie
+ * @param sameSite  the SameSite policy for the cookie
+ * @author zihluwang
+ */
+@ConfigurationProperties(prefix = "app.cookie")
+public record CookieProperties(
+        @DefaultValue("true") Boolean httpOnly,
+        @DefaultValue("true") Boolean secure,
+        @DefaultValue("/") String path,
+        @DefaultValue("PT2H") Duration maxAge,
+        @DefaultValue("LAX") Cookie.SameSite sameSite
+) {
+}

src/main/java/com/onixbyte/deltaforceguide/properties/CorsProperties.java

@@ -6,6 +6,18 @@ import org.springframework.http.HttpMethod;
 
 import java.time.Duration;
 
+/**
+ * Configuration properties for CORS settings, prefixed with "app.cors".
+ *
+ * @param allowedHeaders      headers allowed in CORS requests
+ * @param allowedMethods      HTTP methods allowed in CORS requests
+ * @param allowedOrigins      origins permitted to make cross-origin requests
+ * @param allowCredentials    whether credentials are allowed in CORS requests
+ * @param allowPrivateNetwork whether private network access is permitted
+ * @param maxAge              how long the CORS preflight response may be cached
+ * @param exposedHeaders      headers exposed to the client in CORS responses
+ * @author zihluwang
+ */
 @ConfigurationProperties(prefix = "app.cors")
 public record CorsProperties(
         @DefaultValue({"Content-Type", "Authorization"})

src/main/java/com/onixbyte/deltaforceguide/properties/GitHubWebhookProperties.java

@@ -0,0 +1,12 @@
+package com.onixbyte.deltaforceguide.properties;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+
+import java.util.List;
+
+@ConfigurationProperties(prefix = "app.webhook.github")
+public record GitHubWebhookProperties(
+        String secret,
+        List<String> allowedUsers
+) {
+}

src/main/java/com/onixbyte/deltaforceguide/properties/TokenProperties.java

@@ -0,0 +1,21 @@
+package com.onixbyte.deltaforceguide.properties;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+
+import java.time.Duration;
+
+/**
+ * Configuration properties for JWT token generation and validation, prefixed with "app.jwt".
+ *
+ * @param issuer    the JWT issuer claim
+ * @param secret    the signing secret for JWT tokens
+ * @param validTime the duration for which a token remains valid
+ * @author zihluwang
+ */
+@ConfigurationProperties(prefix = "app.jwt")
+public record TokenProperties(
+        String issuer,
+        String secret,
+        Duration validTime
+) {
+}

src/main/java/com/onixbyte/deltaforceguide/repository/FirearmRepository.java

@@ -7,9 +7,18 @@ import org.springframework.data.domain.Pageable;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.stereotype.Repository;
 
+import java.util.List;
+
+/**
+ * Spring Data JPA repository for {@link Firearm} entity operations.
+ *
+ * @author zihluwang
+ */
 @Repository
 public interface FirearmRepository extends JpaRepository<Firearm, Long> {
 
 	Page<Firearm> findAllByType(FirearmType type, Pageable pageable);
+
+	List<Firearm> findByName(String name);
 }
 

src/main/java/com/onixbyte/deltaforceguide/repository/ModificationRepository.java

@@ -1,14 +1,24 @@
 package com.onixbyte.deltaforceguide.repository;
 
 import com.onixbyte.deltaforceguide.domain.entity.Modification;
+import org.jspecify.annotations.NonNull;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.jpa.repository.EntityGraph;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
 import org.springframework.stereotype.Repository;
 
+import java.util.List;
 import java.util.Optional;
 
+/**
+ * Spring Data JPA repository for {@link Modification} entity operations,
+ * including native JSONB tag filtering for Postgres.
+ *
+ * @author zihluwang
+ */
 @Repository
 public interface ModificationRepository extends JpaRepository<Modification, Long> {
 
@@ -20,7 +30,36 @@ public interface ModificationRepository extends JpaRepository<Modification, Long
 
     @Override
     @EntityGraph(attributePaths = {"firearm"})
-    Optional<Modification> findById(Long id);
+    @NonNull
+    Optional<Modification> findById(@NonNull Long id);
+
+    /**
+     * Page query modifications with optional firearm and JSONB tag filtering.
+     *
+     * @param firearmId optional firearm ID filter (nullable)
+     * @param tagsJson  optional JSON array of tags to match via Postgres {@code @>} operator (nullable)
+     * @param pageable  pagination information
+     * @return a page of matching modifications
+     */
+    @Query(value = """
+            SELECT * FROM modification m
+            WHERE (:firearmId IS NULL OR m.firearm_id = :firearmId)
+              AND (CAST(:tagsJson AS text) IS NULL OR cast(m.tags as jsonb) @> cast(CAST(:tagsJson AS text) as jsonb))
+            """,
+            countQuery = """
+            SELECT count(*) FROM modification m
+            WHERE (:firearmId IS NULL OR m.firearm_id = :firearmId)
+              AND (CAST(:tagsJson AS text) IS NULL OR cast(m.tags as jsonb) @> cast(CAST(:tagsJson AS text) as jsonb))
+            """,
+            nativeQuery = true)
+    Page<Modification> pageQueryByFirearmAndTags(@Param("firearmId") Long firearmId, @Param("tagsJson") String tagsJson, Pageable pageable);
+
+    /**
+     * Retrieve all distinct tag values from modifications, optionally filtered by firearm.
+     *
+     * @param firearmId optional firearm ID filter (nullable)
+     * @return list of distinct tag strings
+     */
+    @Query(value = "SELECT DISTINCT jsonb_array_elements_text(cast(tags as jsonb)) FROM modification WHERE (:firearmId IS NULL OR firearm_id = :firearmId)", nativeQuery = true)
+    List<String> findAllTags(@Param("firearmId") Long firearmId);
 }
-
-

src/main/java/com/onixbyte/deltaforceguide/repository/UserCredentialRepository.java

@@ -0,0 +1,81 @@
+package com.onixbyte.deltaforceguide.repository;
+
+import com.onixbyte.deltaforceguide.domain.entity.UserCredential;
+import com.onixbyte.deltaforceguide.domain.entity.UserCredentialId;
+import org.springframework.data.jpa.repository.Modifying;
+import org.springframework.data.jpa.repository.EntityGraph;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
+import org.springframework.stereotype.Repository;
+
+import java.util.List;
+import java.util.Optional;
+
+/**
+ * Spring Data JPA repository for {@link UserCredential} entity operations.
+ *
+ * @author zihluwang
+ */
+@Repository
+public interface UserCredentialRepository extends JpaRepository<UserCredential, UserCredentialId> {
+
+    /**
+     * Find all credentials belonging to a given user.
+     *
+     * @param userId the user ID
+     * @return list of matching credentials
+     */
+    @EntityGraph(attributePaths = {"user"})
+    @Query("""
+            select uc
+            from UserCredential uc
+            where uc.user.id = :userId
+            """)
+    List<UserCredential> findAllByUserId(@Param("userId") Long userId);
+
+    /**
+     * Find a specific credential for a user by provider.
+     *
+     * @param userId   the user ID
+     * @param provider the authentication provider identifier
+     * @return an optional containing the matching credential, or empty if not found
+     */
+    @EntityGraph(attributePaths = {"user"})
+    @Query("""
+            select uc
+            from UserCredential uc
+            where uc.user.id = :userId
+              and uc.id.provider = :provider
+            """)
+    Optional<UserCredential> findByUserIdAndProvider(@Param("userId") Long userId, @Param("provider") String provider);
+
+    /**
+     * Delete a specific credential for a user by provider.
+     *
+     * @param userId   the user ID
+     * @param provider the authentication provider identifier
+     */
+    @Modifying
+    @Query("""
+            delete from UserCredential uc
+            where uc.user.id = :userId
+              and uc.id.provider = :provider
+            """)
+    void deleteByUserIdAndProvider(@Param("userId") Long userId, @Param("provider") String provider);
+
+    /**
+     * Delete all credentials for a given user.
+     *
+     * @param userId the user ID
+     */
+    @Modifying
+    @Query("""
+            delete from UserCredential uc
+            where uc.user.id = :userId
+            """)
+    void deleteAllByUserId(@Param("userId") Long userId);
+}
+
+
+

src/main/java/com/onixbyte/deltaforceguide/repository/UserRepository.java

@@ -0,0 +1,51 @@
+package com.onixbyte.deltaforceguide.repository;
+
+import com.onixbyte.deltaforceguide.domain.entity.User;
+import org.jspecify.annotations.NonNull;
+import org.springframework.data.jpa.repository.EntityGraph;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
+import org.springframework.stereotype.Repository;
+
+import java.util.Optional;
+
+/**
+ * Spring Data JPA repository for {@link User} entity operations.
+ *
+ * @author zihluwang
+ */
+@Repository
+public interface UserRepository extends JpaRepository<User, Long> {
+
+    @Override
+    @EntityGraph(attributePaths = {"credentials"})
+    @NonNull
+    Optional<User> findById(@NonNull Long id);
+
+    @EntityGraph(attributePaths = {"credentials"})
+    Optional<User> findByUsername(String username);
+
+    @EntityGraph(attributePaths = {"credentials"})
+    Optional<User> findByEmail(String email);
+
+    boolean existsByUsername(String username);
+
+    boolean existsByEmail(String email);
+
+    /**
+     * Find a user by either username or email.
+     *
+     * @param principal the username or email to search for
+     * @return an optional containing the matching user, or empty if not found
+     */
+    @EntityGraph(attributePaths = {"credentials"})
+    @Query("""
+            select u
+            from User u
+            where u.username = :principal
+               or u.email = :principal
+            """)
+    Optional<User> findByUsernameOrEmail(@Param("principal") String principal);
+}
+

src/main/java/com/onixbyte/deltaforceguide/security/annotation/RequiresAuth.java

@@ -0,0 +1,19 @@
+package com.onixbyte.deltaforceguide.security.annotation;
+
+import org.springframework.security.access.prepost.PreAuthorize;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * Annotation to mark controller endpoints that require authentication.
+ *
+ * @author zihluwang
+ */
+@Target({ElementType.METHOD, ElementType.TYPE})
+@Retention(RetentionPolicy.RUNTIME)
+@PreAuthorize("isAuthenticated()")
+public @interface RequiresAuth {
+}

src/main/java/com/onixbyte/deltaforceguide/security/authentication/UsernamePasswordAuthentication.java

@@ -0,0 +1,81 @@
+package com.onixbyte.deltaforceguide.security.authentication;
+
+import com.onixbyte.deltaforceguide.domain.entity.User;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.core.CredentialsContainer;
+import org.springframework.security.core.GrantedAuthority;
+
+import java.util.Collection;
+import java.util.List;
+
+/**
+ * Custom authentication token for username/password-based login flows.
+ *
+ * @author zihluwang
+ */
+public class UsernamePasswordAuthentication implements Authentication, CredentialsContainer {
+    private final String username;
+    private String password;
+    private boolean authenticated;
+    private User user;
+
+    private UsernamePasswordAuthentication(String username, String password, boolean authenticated, User user) {
+        this.username = username;
+        this.password = password;
+        this.authenticated = authenticated;
+        this.user = user;
+    }
+
+    public static UsernamePasswordAuthentication unauthenticated(String username, String password) {
+        return new UsernamePasswordAuthentication(username, password, false, null);
+    }
+
+    public static UsernamePasswordAuthentication authenticated(User user) {
+        return new UsernamePasswordAuthentication(user.getUsername(), null, true, user);
+    }
+
+    @Override
+    public Collection<? extends GrantedAuthority> getAuthorities() {
+        return List.of();
+    }
+
+    @Override
+    public String getCredentials() {
+        return password;
+    }
+
+    @Override
+    public User getDetails() {
+        return user;
+    }
+
+    @Override
+    public String getPrincipal() {
+        return username;
+    }
+
+    @Override
+    public boolean isAuthenticated() {
+        return authenticated;
+    }
+
+    @Override
+    public void setAuthenticated(boolean authenticated) throws IllegalArgumentException {
+        this.authenticated = authenticated;
+    }
+
+    @Override
+    public String getName() {
+        return username;
+    }
+
+    @Override
+    public void eraseCredentials() {
+        this.password = null;
+    }
+
+    public void setDetails(User user) {
+        this.user = user;
+    }
+}
+

src/main/java/com/onixbyte/deltaforceguide/security/provider/UsernamePasswordAuthenticationProvider.java

@@ -0,0 +1,100 @@
+package com.onixbyte.deltaforceguide.security.provider;
+
+import com.onixbyte.deltaforceguide.domain.entity.UserCredential;
+import com.onixbyte.deltaforceguide.exeption.BizException;
+import com.onixbyte.deltaforceguide.manager.UserManager;
+import com.onixbyte.deltaforceguide.repository.UserCredentialRepository;
+import com.onixbyte.deltaforceguide.security.authentication.UsernamePasswordAuthentication;
+import com.onixbyte.deltaforceguide.shared.CredentialProvider;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.data.domain.Example;
+import org.springframework.http.HttpStatus;
+import org.springframework.security.authentication.AuthenticationProvider;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.core.AuthenticationException;
+import org.springframework.security.crypto.password.PasswordEncoder;
+import org.springframework.stereotype.Component;
+
+/**
+ * Authentication provider that validates username/password credentials against stored BCrypt hashes.
+ *
+ * @author zihluwang
+ */
+@Component
+public class UsernamePasswordAuthenticationProvider implements AuthenticationProvider {
+
+    private static final Logger log = LoggerFactory.getLogger(UsernamePasswordAuthenticationProvider.class);
+    private final UserManager userManager;
+    private final PasswordEncoder passwordEncoder;
+    private final UserCredentialRepository userCredentialRepository;
+
+    @Autowired
+    public UsernamePasswordAuthenticationProvider(
+            UserManager userManager,
+            PasswordEncoder passwordEncoder,
+            UserCredentialRepository userCredentialRepository
+    ) {
+        this.userManager = userManager;
+        this.passwordEncoder = passwordEncoder;
+        this.userCredentialRepository = userCredentialRepository;
+    }
+
+    /**
+     * Validates the username/password credentials against stored BCrypt hashes.
+     *
+     * @param authentication the authentication request object
+     * @return a fully authenticated object including user details
+     */
+    @Override
+    public Authentication authenticate(Authentication authentication) throws AuthenticationException {
+        if (!(authentication instanceof UsernamePasswordAuthentication usernamePasswordAuthentication)) {
+            throw new BizException(HttpStatus.INTERNAL_SERVER_ERROR, "用户认证失败，请稍后再试。");
+        }
+
+        // get userContainer from database
+        var userContainer = userManager.findByUsernameOrEmail(usernamePasswordAuthentication.getPrincipal());
+        if (userContainer.isEmpty()) {
+            log.error("User {} is trying to authenticate but no userContainer found.", usernamePasswordAuthentication.getPrincipal());
+            throw new BizException(HttpStatus.UNAUTHORIZED, "用户名或密码错误。");
+        }
+
+        var user = userContainer.get();
+
+        var userCredentialExample = new UserCredential();
+        userCredentialExample.setUserId(user.getId());
+        userCredentialExample.setProvider(CredentialProvider.LOCAL);
+
+        // get userContainer credentials from database
+        var userCredentials = userCredentialRepository.findOne(Example.of(userCredentialExample))
+                .orElseThrow(() -> new BizException(HttpStatus.UNAUTHORIZED, "您还没有配置密码，请联系管理员处理。"));
+
+        // validate password
+        if (!passwordEncoder.matches(usernamePasswordAuthentication.getCredentials(), userCredentials.getCredential())) {
+            log.error("User {} is trying to authenticate but password is incorrect.", usernamePasswordAuthentication.getPrincipal());
+            throw new BizException(HttpStatus.UNAUTHORIZED, "用户名或密码错误。");
+        }
+
+        // erase credentials
+        usernamePasswordAuthentication.eraseCredentials();
+
+        // set values
+        usernamePasswordAuthentication.setAuthenticated(true);
+        usernamePasswordAuthentication.setDetails(user);
+
+        return usernamePasswordAuthentication;
+    }
+
+    /**
+     * Checks if this provider supports the given authentication type.
+     *
+     * @param authentication the authentication class to check
+     * @return true if this provider supports the given type
+     */
+    @Override
+    public boolean supports(Class<?> authentication) {
+        return UsernamePasswordAuthentication.class.isAssignableFrom(authentication);
+    }
+}
+

src/main/java/com/onixbyte/deltaforceguide/service/AppService.java

@@ -0,0 +1,18 @@
+package com.onixbyte.deltaforceguide.service;
+
+import com.onixbyte.deltaforceguide.manager.AppManager;
+import org.springframework.stereotype.Service;
+
+@Service
+public class AppService {
+
+    private final AppManager appManager;
+
+    public AppService(AppManager appManager) {
+        this.appManager = appManager;
+    }
+
+    public String getVersion() {
+        return appManager.getVersion();
+    }
+}

src/main/java/com/onixbyte/deltaforceguide/service/AuthService.java

@@ -0,0 +1,52 @@
+package com.onixbyte.deltaforceguide.service;
+
+import com.onixbyte.deltaforceguide.domain.dto.LoginRequest;
+import com.onixbyte.deltaforceguide.domain.entity.User;
+import com.onixbyte.deltaforceguide.exeption.BizException;
+import com.onixbyte.deltaforceguide.security.authentication.UsernamePasswordAuthentication;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.http.HttpStatus;
+import org.springframework.security.authentication.AuthenticationManager;
+import org.springframework.stereotype.Service;
+
+/**
+ * Service handling user authentication, login, and session management.
+ *
+ * @author zihluwang
+ */
+@Service
+public class AuthService {
+
+    private static final Logger log = LoggerFactory.getLogger(AuthService.class);
+    private final AuthenticationManager authenticationManager;
+
+    public AuthService(AuthenticationManager authenticationManager) {
+        this.authenticationManager = authenticationManager;
+    }
+
+    /**
+     * Authenticates a user with the given login credentials.
+     * <p>
+     * Delegates authentication to Spring Security's {@link AuthenticationManager} and verifies
+     * that the result is of the expected {@link UsernamePasswordAuthentication} type.
+     *
+     * @param request the login credentials containing principle and password
+     * @return the authenticated {@link User}
+     * @throws BizException if authentication fails or the result type is unexpected
+     */
+    public User login(LoginRequest request) {
+        var _authentication = authenticationManager.authenticate(UsernamePasswordAuthentication
+                .unauthenticated(request.principle(), request.credential()));
+        if (!(_authentication instanceof UsernamePasswordAuthentication authentication)) {
+            log.error(
+                    "Type mismatched, required type is UsernamePasswordAuthentication but got {}.",
+                    _authentication.getClass()
+            );
+            throw new BizException(HttpStatus.INTERNAL_SERVER_ERROR, "登录服务异常，请稍后再试。");
+        }
+
+        return authentication.getDetails();
+    }
+
+}

src/main/java/com/onixbyte/deltaforceguide/service/CookieService.java

@@ -0,0 +1,67 @@
+package com.onixbyte.deltaforceguide.service;
+
+import com.onixbyte.deltaforceguide.manager.CookieManager;
+import org.springframework.http.ResponseCookie;
+import org.springframework.stereotype.Service;
+
+import java.time.Duration;
+
+/**
+ * Service for building HTTP cookies with configurable properties.
+ *
+ * @author zihluwang
+ */
+@Service
+public class CookieService {
+
+    private final CookieManager cookieManager;
+
+    public CookieService(CookieManager cookieManager) {
+        this.cookieManager = cookieManager;
+    }
+
+    /**
+     * Builds a response cookie with the default max age from configuration.
+     *
+     * @param cookieName the cookie name
+     * @param value      the cookie value
+     * @return a configured ResponseCookie
+     */
+    public ResponseCookie buildCookie(String cookieName, String value) {
+        return buildCookieInternal(cookieName, value, cookieManager.getMaxAge());
+    }
+
+    /**
+     * Builds a response cookie with a custom valid duration.
+     *
+     * @param cookieName    the cookie name
+     * @param value         the cookie value
+     * @param validDuration the cookie's max age
+     * @return a configured ResponseCookie
+     */
+    public ResponseCookie buildCookie(String cookieName, String value, Duration validDuration) {
+        return buildCookieInternal(cookieName, value, validDuration);
+    }
+
+    /**
+     * Creates a response cookie builder with specified name, value and valid duration.
+     *
+     * @param name   name of the cookie
+     * @param value  value of the cookie
+     * @param maxAge valid duration of the cookie
+     * @return cookie builder
+     */
+    protected ResponseCookie buildCookieInternal(
+            String name,
+            String value,
+            Duration maxAge
+    ) {
+        return ResponseCookie.from(name, value)
+                .secure(cookieManager.getSecure())
+                .maxAge(maxAge)
+                .httpOnly(cookieManager.getHttpOnly())
+                .path(cookieManager.getPath())
+                .sameSite(cookieManager.getSameSite().attributeValue())
+                .build();
+    }
+}

src/main/java/com/onixbyte/deltaforceguide/service/DailyPasswordService.java

@@ -0,0 +1,28 @@
+package com.onixbyte.deltaforceguide.service;
+
+import com.onixbyte.deltaforceguide.domain.dto.DailyPasswordResponse;
+import com.onixbyte.deltaforceguide.manager.DailyPasswordManager;
+import org.springframework.stereotype.Service;
+
+/**
+ * Service for generating and caching daily rotation passwords.
+ *
+ * @author zihluwang
+ */
+@Service
+public class DailyPasswordService {
+
+    private final DailyPasswordManager dailyPasswordManager;
+
+    public DailyPasswordService(DailyPasswordManager dailyPasswordManager) {
+        this.dailyPasswordManager = dailyPasswordManager;
+    }
+
+    /**
+     * Retrieves the daily password for the current day.
+     * @return the daily password response
+     */
+    public DailyPasswordResponse getDailyPassword() {
+        return dailyPasswordManager.getDailyPassword();
+    }
+}

src/main/java/com/onixbyte/deltaforceguide/service/FirearmService.java

@@ -1,17 +1,23 @@
 package com.onixbyte.deltaforceguide.service;
 
+import com.onixbyte.deltaforceguide.domain.dto.FirearmRequest;
 import com.onixbyte.deltaforceguide.domain.dto.FirearmResponse;
 import com.onixbyte.deltaforceguide.domain.dto.PageResponse;
 import com.onixbyte.deltaforceguide.domain.entity.Firearm;
 import com.onixbyte.deltaforceguide.enumeration.FirearmType;
+import com.onixbyte.deltaforceguide.exeption.BizException;
 import com.onixbyte.deltaforceguide.repository.FirearmRepository;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.http.HttpStatus;
 import org.springframework.stereotype.Service;
-import org.springframework.transaction.annotation.Transactional;
 import org.springframework.web.server.ResponseStatusException;
 
+/**
+ * Service handling firearm business logic including CRUD operations and queries.
+ *
+ * @author zihluwang
+ */
 @Service
 public class FirearmService {
 
@@ -21,7 +27,13 @@ public class FirearmService {
         this.firearmRepository = firearmRepository;
     }
 
-    @Transactional(readOnly = true)
+    /**
+     * Queries firearms with optional type filter and pagination.
+     *
+     * @param type optional firearm type filter
+     * @param pageable pagination parameters
+     * @return a paginated response of firearm records
+     */
     public PageResponse<FirearmResponse> pageQuery(FirearmType type, Pageable pageable) {
         Page<Firearm> page = type == null
                 ? firearmRepository.findAll(pageable)
@@ -30,11 +42,70 @@ public class FirearmService {
         return PageResponse.from(page.map(FirearmResponse::from));
     }
 
-    @Transactional(readOnly = true)
+    /**
+     * Finds a firearm by its ID.
+     *
+     * @param id the firearm ID
+     * @return the firearm response
+     */
     public FirearmResponse queryById(Long id) {
         return firearmRepository.findById(id)
                 .map(FirearmResponse::from)
                 .orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND, "Firearm not found: " + id));
     }
+
+    /**
+     * Creates a new firearm from the provided request data.
+     *
+     * @param request the firearm creation request
+     * @return the created firearm response
+     */
+    public FirearmResponse addFirearm(FirearmRequest request) {
+        var firearm = firearmRepository.save(Firearm.builder()
+                .name(request.name())
+                .type(request.type())
+                .level(request.level())
+                .calibre(request.calibre())
+                .fireRate(request.fireRate())
+                .armourDamage(request.armourDamage())
+                .bodyDamage(request.bodyDamage())
+                .review(request.review())
+                .build());
+        
+        return FirearmResponse.from(firearm);
     }
 
+    /**
+     * Updates an existing firearm identified by ID.
+     *
+     * @param id the firearm ID
+     * @param request the updated firearm data
+     * @return the updated firearm response
+     */
+    public FirearmResponse updateFirearm(Long id, FirearmRequest request) {
+        var firearm = firearmRepository.findById(id)
+                .orElseThrow(() -> new BizException(HttpStatus.NOT_FOUND, "Firearm not found: " + id));
+
+        firearm.setName(request.name());
+        firearm.setType(request.type());
+        firearm.setLevel(request.level());
+        firearm.setCalibre(request.calibre());
+        firearm.setFireRate(request.fireRate());
+        firearm.setArmourDamage(request.armourDamage());
+        firearm.setBodyDamage(request.bodyDamage());
+        firearm.setReview(request.review());
+
+        return FirearmResponse.from(firearmRepository.save(firearm));
+    }
+
+    /**
+     * Deletes a firearm by its ID.
+     *
+     * @param id the firearm ID to delete
+     */
+    public void deleteFirearm(Long id) {
+        Firearm firearm = firearmRepository.findById(id)
+                .orElseThrow(() -> new BizException(HttpStatus.NOT_FOUND, "Firearm not found: " + id));
+        firearmRepository.delete(firearm);
+    }
+}

src/main/java/com/onixbyte/deltaforceguide/service/ModificationService.java

@@ -1,39 +1,219 @@
 package com.onixbyte.deltaforceguide.service;
 
+import com.onixbyte.deltaforceguide.domain.dto.AccessoryRequest;
+import com.onixbyte.deltaforceguide.domain.dto.ModificationRequest;
 import com.onixbyte.deltaforceguide.domain.dto.ModificationResponse;
 import com.onixbyte.deltaforceguide.domain.dto.PageResponse;
+import com.onixbyte.deltaforceguide.domain.dto.TuningRequest;
+import com.onixbyte.deltaforceguide.domain.entity.Accessory;
+import com.onixbyte.deltaforceguide.domain.entity.Firearm;
 import com.onixbyte.deltaforceguide.domain.entity.Modification;
+import com.onixbyte.deltaforceguide.domain.entity.Tuning;
+import com.onixbyte.deltaforceguide.manager.ModificationManager;
+import com.onixbyte.deltaforceguide.repository.FirearmRepository;
 import com.onixbyte.deltaforceguide.repository.ModificationRepository;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.http.HttpStatus;
 import org.springframework.stereotype.Service;
-import org.springframework.transaction.annotation.Transactional;
 import org.springframework.web.server.ResponseStatusException;
 
+import java.util.ArrayList;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Set;
+
+/**
+ * Service handling modification business logic including CRUD, batch operations, and tag filtering.
+ *
+ * @author zihluwang
+ */
 @Service
 public class ModificationService {
 
     private final ModificationRepository modificationRepository;
+    private final FirearmRepository firearmRepository;
+    private final ModificationManager modificationManager;
+    private final ObjectMapper objectMapper;
 
-    public ModificationService(ModificationRepository modificationRepository) {
+    public ModificationService(
+            ModificationRepository modificationRepository,
+            FirearmRepository firearmRepository,
+            ModificationManager modificationManager,
+            ObjectMapper objectMapper
+    ) {
         this.modificationRepository = modificationRepository;
+        this.firearmRepository = firearmRepository;
+        this.modificationManager = modificationManager;
+        this.objectMapper = objectMapper;
     }
 
-    @Transactional(readOnly = true)
-    public PageResponse<ModificationResponse> pageQuery(Long firearmId, Pageable pageable) {
-        Page<Modification> page = firearmId == null
-                ? modificationRepository.findAllBy(pageable)
-                : modificationRepository.findAllByFirearm_Id(firearmId, pageable);
+    /**
+     * Queries modifications with optional firearm and tag filters.
+     *
+     * @param firearmId optional firearm ID filter
+     * @param tags optional tag list filter
+     * @param pageable pagination parameters
+     * @return a paginated response of modification records
+     */
+    public PageResponse<ModificationResponse> pageQuery(Long firearmId, List<String> tags, Pageable pageable) {
+        String tagsJson = null;
+        if (tags != null && !tags.isEmpty()) {
+            try {
+                tagsJson = objectMapper.writeValueAsString(tags);
+            } catch (JsonProcessingException e) {
+                throw new RuntimeException("Failed to serialize tags", e);
+            }
+        }
+        
+        Page<Modification> page;
+        if (tagsJson != null || firearmId != null) {
+            page = modificationRepository.pageQueryByFirearmAndTags(firearmId, tagsJson, pageable);
+        } else {
+            page = modificationRepository.findAllBy(pageable);
+        }
 
         return PageResponse.from(page.map(ModificationResponse::from));
     }
 
-    @Transactional(readOnly = true)
+    /**
+     * Finds a modification by its ID.
+     *
+     * @param id the modification ID
+     * @return the modification response
+     */
     public ModificationResponse queryById(Long id) {
         return modificationRepository.findById(id)
                 .map(ModificationResponse::from)
                 .orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND, "Modification not found: " + id));
     }
+
+    /**
+     * Finds all unique tags across modifications, optionally scoped to a firearm.
+     *
+     * @param firearmId optional firearm ID to scope the tag search
+     * @return list of unique tag strings
+     */
+    public List<String> findAllTags(Long firearmId) {
+        return modificationRepository.findAllTags(firearmId);
     }
 
+    /**
+     * Creates a new modification for a given firearm.
+     *
+     * @param request the modification creation request
+     * @return the created modification response
+     */
+    public ModificationResponse create(ModificationRequest request) {
+        return modificationManager.create(request);
+    }
+
+    /**
+     * Creates multiple modifications in a single batch operation.
+     *
+     * @param requests list of modification creation requests
+     * @return list of created modification responses
+     */
+    public List<ModificationResponse> batchCreate(List<ModificationRequest> requests) {
+        return modificationManager.batchCreate(requests);
+    }
+
+    /**
+     * Updates an existing modification identified by ID.
+     *
+     * @param id the modification ID
+     * @param request the updated modification data
+     * @return the updated modification response
+     */
+    public ModificationResponse update(Long id, ModificationRequest request) {
+        Modification modification = modificationRepository.findById(id)
+                .orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND, "Modification not found: " + id));
+        Firearm firearm = firearmRepository.findById(request.firearmId())
+                .orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND, "Firearm not found: " + request.firearmId()));
+
+        modification.setFirearm(firearm);
+        modification.setName(request.name());
+        modification.setCode(request.code());
+        modification.setTags(safeTags(request.tags()));
+        modification.setAccessories(toAccessories(request.accessories()));
+        modification.setNote(request.note());
+        modification.setAuthor(request.author());
+        modification.setVideoUrl(request.videoUrl());
+
+        return ModificationResponse.from(modificationRepository.save(modification));
+    }
+
+    /**
+     * Deletes a modification by its ID.
+     *
+     * @param id the modification ID to delete
+     */
+    public void delete(Long id) {
+        Modification modification = modificationRepository.findById(id)
+                .orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND, "Modification not found: " + id));
+        modificationRepository.delete(modification);
+    }
+
+    /**
+     * Deletes multiple modifications in a single batch operation.
+     *
+     * @param ids list of modification IDs to delete
+     */
+    public void batchDelete(List<Long> ids) {
+        Set<Long> uniqueIds = new LinkedHashSet<>(ids);
+        List<Modification> modifications = modificationRepository.findAllById(uniqueIds);
+
+        if (modifications.size() != uniqueIds.size()) {
+            Set<Long> foundIds = modifications.stream()
+                    .map(Modification::getId)
+                    .collect(java.util.stream.Collectors.toSet());
+            List<Long> missingIds = uniqueIds.stream()
+                    .filter(id -> !foundIds.contains(id))
+                    .toList();
+            throw new ResponseStatusException(HttpStatus.NOT_FOUND, "Modification not found: " + missingIds);
+        }
+
+        modificationRepository.deleteAllInBatch(modifications);
+    }
+
+    private List<String> safeTags(List<String> tags) {
+        return tags == null ? new ArrayList<>() : tags;
+    }
+
+    private List<Accessory> toAccessories(List<AccessoryRequest> accessoryRequests) {
+        if (accessoryRequests == null) {
+            return new ArrayList<>();
+        }
+
+        return accessoryRequests.stream()
+                .map(this::toAccessory)
+                .toList();
+    }
+
+    private Accessory toAccessory(AccessoryRequest request) {
+        Accessory accessory = new Accessory();
+        accessory.setSlotName(request.slotName());
+        accessory.setAccessoryName(request.accessoryName());
+        accessory.setTunings(toTunings(request.tunings()));
+        return accessory;
+    }
+
+    private List<Tuning> toTunings(List<TuningRequest> tuningRequests) {
+        if (tuningRequests == null) {
+            return new ArrayList<>();
+        }
+
+        return tuningRequests.stream()
+                .map(this::toTuning)
+                .toList();
+    }
+
+    private Tuning toTuning(TuningRequest request) {
+        Tuning tuning = new Tuning();
+        tuning.setTuningName(request.tuningName());
+        tuning.setTuningValue(request.tuningValue());
+        return tuning;
+    }
+}

src/main/java/com/onixbyte/deltaforceguide/service/UserService.java

@@ -0,0 +1,155 @@
+package com.onixbyte.deltaforceguide.service;
+
+import com.onixbyte.deltaforceguide.domain.entity.User;
+import com.onixbyte.deltaforceguide.domain.entity.UserCredential;
+import com.onixbyte.deltaforceguide.manager.UserCredentialManager;
+import com.onixbyte.deltaforceguide.manager.UserManager;
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Service;
+import org.springframework.web.server.ResponseStatusException;
+
+import java.util.List;
+
+/**
+ * Service for user account management and profile operations.
+ *
+ * @author zihluwang
+ */
+@Service
+public class UserService {
+
+    private final UserManager userManager;
+    private final UserCredentialManager userCredentialManager;
+
+    public UserService(UserManager userManager, UserCredentialManager userCredentialManager) {
+        this.userManager = userManager;
+        this.userCredentialManager = userCredentialManager;
+    }
+
+    /**
+     * Retrieves all registered users.
+     *
+     * @return list of all users
+     */
+    public List<User> findAll() {
+        return userManager.findAll();
+    }
+
+    /**
+     * Finds a user by their ID.
+     *
+     * @param id the user ID
+     * @return the user
+     */
+    public User queryById(Long id) {
+        return userManager.findById(id)
+                .orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND, "User not found: " + id));
+    }
+
+    /**
+     * Finds a user by their username.
+     *
+     * @param username the username to search for
+     * @return the user
+     */
+    public User queryByUsername(String username) {
+        return userManager.findByUsername(username)
+                .orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND, "User not found: " + username));
+    }
+
+    /**
+     * Creates a new user account.
+     *
+     * @param user the user entity to persist
+     * @return the saved user entity
+     */
+    public User create(User user) {
+        return userManager.save(user);
+    }
+
+    /**
+     * Updates an existing user account.
+     *
+     * @param user the user entity with updated fields
+     * @return the saved user entity
+     */
+    public User update(User user) {
+        if (user.getId() == null || userManager.findById(user.getId()).isEmpty()) {
+            throw new ResponseStatusException(HttpStatus.NOT_FOUND, "User not found: " + user.getId());
+        }
+        return userManager.save(user);
+    }
+
+    /**
+     * Finds all credentials associated with a user.
+     *
+     * @param userId the user ID
+     * @return list of user credentials
+     */
+    public List<UserCredential> findCredentials(Long userId) {
+        ensureUserExists(userId);
+        return userCredentialManager.findAllByUserId(userId);
+    }
+
+    /**
+     * Queries a specific credential for a user by provider.
+     *
+     * @param userId   the user ID
+     * @param provider the authentication provider
+     * @return the matching credential
+     */
+    public UserCredential queryCredential(Long userId, String provider) {
+        ensureUserExists(userId);
+        return userCredentialManager.findByUserIdAndProvider(userId, provider)
+                .orElseThrow(() -> new ResponseStatusException(
+                        HttpStatus.NOT_FOUND,
+                        "User credential not found: userId=" + userId + ", provider=" + provider));
+    }
+
+    /**
+     * Creates or updates a credential for a user and provider.
+     *
+     * @param userId     the user ID
+     * @param provider   the authentication provider
+     * @param credential the credential value
+     * @return the saved credential
+     */
+    public UserCredential upsertCredential(Long userId, String provider, String credential) {
+        User user = ensureUserExists(userId);
+        UserCredential userCredential = userCredentialManager.findByUserIdAndProvider(userId, provider)
+                .orElseGet(UserCredential::new);
+        userCredential.setUser(user);
+        userCredential.setProvider(provider);
+        userCredential.setCredential(credential);
+        return userCredentialManager.save(userCredential);
+    }
+
+    /**
+     * Deletes a specific credential for a user by provider.
+     *
+     * @param userId   the user ID
+     * @param provider the authentication provider
+     */
+    public void deleteCredential(Long userId, String provider) {
+        ensureUserExists(userId);
+        userCredentialManager.deleteByUserIdAndProvider(userId, provider);
+    }
+
+    /**
+     * Deletes a user and all associated credentials.
+     *
+     * @param id the user ID to delete
+     */
+    public void deleteById(Long id) {
+        ensureUserExists(id);
+        userCredentialManager.deleteAllByUserId(id);
+        userManager.deleteById(id);
+    }
+
+    private User ensureUserExists(Long userId) {
+        return userManager.findById(userId)
+                .orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND, "User not found: " + userId));
+    }
+}
+
+

src/main/java/com/onixbyte/deltaforceguide/service/WebhookService.java

@@ -0,0 +1,219 @@
+package com.onixbyte.deltaforceguide.service;
+
+import com.onixbyte.deltaforceguide.domain.dto.*;
+import com.onixbyte.deltaforceguide.manager.ModificationManager;
+import com.onixbyte.deltaforceguide.manager.WebhookManager;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.data.redis.core.RedisTemplate;
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Service;
+import com.onixbyte.deltaforceguide.exeption.BizException;
+import org.yaml.snakeyaml.Yaml;
+
+import java.time.Duration;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.regex.Pattern;
+
+@Service
+public class WebhookService {
+
+    private static final Logger log = LoggerFactory.getLogger(WebhookService.class);
+    private static final String TRIGGER_LABEL = "weapon-mod";
+    private static final Duration DEDUP_TTL = Duration.ofHours(12);
+    private static final Pattern YAML_FENCE =
+            Pattern.compile("```ya?ml\\s*\\R(.*?)```", Pattern.DOTALL);
+
+    private final ModificationManager modificationManager;
+    private final RedisTemplate<String, Object> redisTemplate;
+    private final WebhookManager webhookManager;
+    private final Yaml yaml;
+
+    public WebhookService(
+            ModificationManager modificationManager,
+            RedisTemplate<String, Object> redisTemplate,
+            WebhookManager webhookManager
+    ) {
+        this.modificationManager = modificationManager;
+        this.redisTemplate = redisTemplate;
+        this.webhookManager = webhookManager;
+        this.yaml = new Yaml();
+    }
+
+    public void processIssueEvent(GitHubIssueRequest request) {
+        var issue = request.issue();
+        var repository = request.repository();
+        var sender = request.sender();
+
+        if (!isAllowedSender(sender)) {
+            log.info("Issue #{} sender={} not in allowed-users, skipping",
+                    issue.number(), sender != null ? sender.login() : "null");
+            return;
+        }
+
+        if (!hasTriggerLabel(issue.labels())) {
+            log.debug("Issue #{} lacks trigger label, skipping", issue.number());
+            return;
+        }
+
+        var dedupKey = "github:webhook:processed:%s:%d"
+                .formatted(repository.fullName(), issue.number());
+        var acquired = redisTemplate.opsForValue()
+                .setIfAbsent(dedupKey, "1", DEDUP_TTL);
+        if (acquired == null || !acquired) {
+            log.info("Issue #{} already processed, skipping", issue.number());
+            return;
+        }
+
+        var parsedYaml = extractYaml(issue.body());
+        if (parsedYaml == null) {
+            log.warn("No YAML block found in issue #{} body", issue.number());
+            return;
+        }
+
+        var data = yaml.<Map<String, Object>>load(parsedYaml);
+        if (data == null) {
+            log.warn("Empty YAML block in issue #{}", issue.number());
+            return;
+        }
+
+        if (data.containsKey("modifications")) {
+            processBatch(issue.number(), data);
+        } else {
+            processSingle(issue.number(), data);
+        }
+    }
+
+    private void processSingle(Long issueNumber, Map<String, Object> data) {
+        var request = mapToRequest(data);
+        log.info("Creating modification from issue #{}: name={}", issueNumber, request.name());
+        modificationManager.create(request);
+    }
+
+    @SuppressWarnings("unchecked")
+    private void processBatch(Long issueNumber, Map<String, Object> data) {
+        var list = (List<Map<String, Object>>) data.get("modifications");
+        if (list == null || list.isEmpty()) {
+            log.warn("Empty modifications list in issue #{}", issueNumber);
+            return;
+        }
+        var requests = list.stream()
+                .map(this::mapToRequest)
+                .toList();
+        log.info("Batch creating {} modifications from issue #{}", requests.size(), issueNumber);
+        modificationManager.batchCreate(requests);
+    }
+
+    private ModificationRequest mapToRequest(Map<String, Object> data) {
+        Long firearmId = modificationManager.resolveFirearmId(
+                toLong(data.get("firearmId")),
+                (String) data.get("firearmName"));
+        if (firearmId == null) {
+            throw new BizException(HttpStatus.BAD_REQUEST,
+                    "YAML must contain firearmId or firearmName");
+        }
+        String name = (String) data.get("name");
+        String code = (String) data.get("code");
+        List<String> tags = toStringList(data.get("tags"));
+        List<AccessoryRequest> accessories = mapAccessories(data.get("accessories"));
+        String note = (String) data.get("note");
+        String author = (String) data.get("author");
+        String videoUrl = (String) data.get("videoUrl");
+
+        return new ModificationRequest(firearmId, name, code, tags, accessories,
+                note, author, videoUrl);
+    }
+
+    private List<AccessoryRequest> mapAccessories(Object raw) {
+        if (!(raw instanceof List<?> list)) {
+            return new ArrayList<>();
+        }
+        var result = new ArrayList<AccessoryRequest>();
+        for (var item : list) {
+            if (item instanceof Map<?, ?> map) {
+                result.add(new AccessoryRequest(
+                        (String) map.get("slotName"),
+                        (String) map.get("accessoryName"),
+                        mapTunings(map.get("tunings"))
+                ));
+            }
+        }
+        return result;
+    }
+
+    private List<TuningRequest> mapTunings(Object raw) {
+        if (!(raw instanceof List<?> list)) {
+            return new ArrayList<>();
+        }
+        var result = new ArrayList<TuningRequest>();
+        for (var item : list) {
+            if (item instanceof Map<?, ?> map) {
+                result.add(new TuningRequest(
+                        (String) map.get("tuningName"),
+                        toDouble(map.get("tuningValue"))
+                ));
+            }
+        }
+        return result;
+    }
+
+    private List<String> toStringList(Object raw) {
+        if (raw instanceof List<?> list) {
+            return list.stream()
+                    .filter(String.class::isInstance)
+                    .map(String.class::cast)
+                    .toList();
+        }
+        return new ArrayList<>();
+    }
+
+    private boolean isAllowedSender(
+            GitHubWebhookSender sender
+    ) {
+        var allowedUsers = webhookManager.allowedUsers();
+        if (allowedUsers == null || allowedUsers.isEmpty()) {
+            return true;
+        }
+        if (sender == null || sender.login() == null) {
+            return false;
+        }
+        return allowedUsers.contains(sender.login());
+    }
+
+    private boolean hasTriggerLabel(List<GitHubWebhookLabel> labels) {
+        if (labels == null) {
+            return false;
+        }
+        return labels.stream().anyMatch(label -> TRIGGER_LABEL.equals(label.name()));
+    }
+
+    private String extractYaml(String body) {
+        if (body == null) {
+            return null;
+        }
+        var matcher = YAML_FENCE.matcher(body);
+        return matcher.find() ? matcher.group(1) : null;
+    }
+
+    private Long toLong(Object value) {
+        if (value instanceof Number num) {
+            return num.longValue();
+        }
+        if (value instanceof String s) {
+            return Long.parseLong(s);
+        }
+        return null;
+    }
+
+    private Double toDouble(Object value) {
+        if (value instanceof Number num) {
+            return num.doubleValue();
+        }
+        if (value instanceof String s) {
+            return Double.parseDouble(s);
+        }
+        return null;
+    }
+}

src/main/java/com/onixbyte/deltaforceguide/shared/CookieName.java

@@ -0,0 +1,11 @@
+package com.onixbyte.deltaforceguide.shared;
+
+/**
+ * Constants for HTTP cookie names used for authentication tokens.
+ *
+ * @author zihluwang
+ */
+public class CookieName {
+
+    public static final String ACCESS_TOKEN = "AccessToken";
+}

src/main/java/com/onixbyte/deltaforceguide/shared/CredentialProvider.java

@@ -0,0 +1,11 @@
+package com.onixbyte.deltaforceguide.shared;
+
+/**
+ * Constants for supported authentication provider identifiers.
+ *
+ * @author zihluwang
+ */
+public class CredentialProvider {
+
+    public static final String LOCAL = "LOCAL";
+}

src/main/java/com/onixbyte/deltaforceguide/shared/GitHubWebhookHeader.java

@@ -0,0 +1,56 @@
+package com.onixbyte.deltaforceguide.shared;
+
+/**
+ * This class lists the header names that GitHub sends in webhook requests.
+ *
+ * @author siujamo
+ */
+public class GitHubWebhookHeader {
+
+    /**
+     * The unique identifier of the webhook.
+     */
+    public static final String HOOK_ID = "X-GitHub-Hook-ID";
+
+    /**
+     * The name of the event that triggered the delivery.
+     */
+    public static final String EVENT = "X-GitHub-Event";
+
+    /**
+     * A globally unique identifier (GUID) to identify the event.
+     */
+    public static final String DELIVERY = "X-GitHub-Delivery";
+
+    /**
+     * This header is sent if the webhook is configured with a {@code secret}. This is the HMAC hex
+     * digest of the request body, and is generated using the SHA-1 hash function and the secret as
+     * the HMAC {@code key}. {@code X-Hub-Signature} is provided for compatibility with
+     * existing integrations. We recommend that you use the more secure
+     * {@code X-Hub-Signature-256} instead.
+     */
+    public static final String SIGNATURE = "X-Hub-Signature";
+
+    /**
+     * This header is sent if the webhook is configured with a {@code secret}. This is the HMAC hex
+     * digest of the request body, and is generated using the SHA-256 hash function and the
+     * {@code secret} as the HMAC key. For more information, see <a href="https://docs.github.com/en/webhooks/using-webhooks/securing-your-webhooks"
+     * >Validating webhook deliveries</a>.
+     */
+    public static final String SIGNATURE_256 = "X-Hub-Signature-256";
+
+    /**
+     * This header will always have the prefix {@code GitHub-Hookshot/}.
+     */
+    public static final String USER_AGENT = "User-Agent";
+
+    /**
+     * The type of resource where the webhook was created.
+     */
+    public static final String INSTALLATION_TARGET_TYPE = "X-GitHub-Hook-Installation-Target-Type";
+
+    /**
+     * The unique identifier of the resource where the webhook was created.
+     */
+    public static final String INSTALLATION_TARGET_ID = "X-GitHub-Hook-Installation-Target-ID";
+}

src/main/java/com/onixbyte/deltaforceguide/shared/JacksonModules.java

@@ -13,6 +13,12 @@ import java.time.LocalDate;
 import java.time.LocalDateTime;
 import java.time.LocalTime;
 
+/**
+ * Shared Jackson {@link com.fasterxml.jackson.databind.Module} instances for custom date/time
+ * serialisation and deserialisation across the application.
+ *
+ * @author zihluwang
+ */
 public class JacksonModules {
 
     public static final SimpleModule DATE_TIME_MODULE = initialiseDateTimeModule();

src/main/java/com/onixbyte/deltaforceguide/shared/JacksonRedisSerialiser.java

@@ -4,6 +4,12 @@ import com.fasterxml.jackson.databind.SerializationFeature;
 import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
 import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;
 
+/**
+ * Singleton serialiser for Redis cache operations using
+ * {@link GenericJackson2JsonRedisSerializer} with JavaTime module support.
+ *
+ * @author zihluwang
+ */
 public class JacksonRedisSerialiser {
 
     public static final GenericJackson2JsonRedisSerializer INSTANCE = initialiseSerializer();