flowchart TD
    %% External Access
    E1["User Request"]:::external

    %% Application Entry
    A1["SastApprovalApplication"]:::app
    E1 --> A1
    click A1 "https://github.com/rooobinye/sast-approval/blob/master/src/main/java/com/sast/approval/SastApprovalApplication.java"

    %% Security Interceptor (JWT & AOP)
    sec["JWT Interceptor & AOP\n(Annotations/Aspects)"]:::security
    E1 --> sec
    sec --> A1
    click sec "https://github.com/rooobinye/sast-approval/blob/master/src/main/java/com/sast/approval/interceptor/JwtInterceptor.java"

    %% Presentation Layer
    subgraph "Presentation Layer"
        ctrl["REST Controllers"]:::controller
    end
    A1 --> ctrl
    click ctrl "https://github.com/rooobinye/sast-approval/tree/master/src/main/java/com/sast/approval/controller"

    %% Business Logic Layer
    subgraph "Business Layer"
        svc["Service Components"]:::service
    end
    ctrl --> svc
    click svc "https://github.com/rooobinye/sast-approval/tree/master/src/main/java/com/sast/approval/service"

    %% Data Access Layer
    subgraph "Data Access Layer"
        mapper["Mapper Interfaces"]:::mapper
    end
    svc --> mapper
    click mapper "https://github.com/rooobinye/sast-approval/tree/master/src/main/java/com/sast/approval/mapper"

    %% Data Models
    model["Data Models & DTO"]:::model
    ctrl --> model
    svc --> model
    click model "https://github.com/rooobinye/sast-approval/tree/master/src/main/java/com/sast/approval/model"

    %% Global Exception Handling
    exception["Global Exception Handler"]:::exception
    ctrl -.-> exception
    svc -.-> exception
    click exception "https://github.com/rooobinye/sast-approval/tree/master/src/main/java/com/sast/approval/exception"

    %% Configuration Components
    config["Configuration Components\n(Jackson, MyBatis-Plus, Redis, etc.)"]:::config
    config --- ctrl
    config --- svc
    config --- mapper
    click config "https://github.com/rooobinye/sast-approval/tree/master/src/main/java/com/sast/approval/config"

    %% Utility Classes
    utils["Utility Classes\n(JwtUtils, PasswordEncoder, RedisUtils)"]:::utility
    utils --- ctrl
    utils --- svc
    click utils "https://github.com/rooobinye/sast-approval/tree/master/src/main/java/com/sast/approval/utils"

    %% External Systems
    mysql["MySQL Database"]:::db
    mapper --> mysql

    redis["Redis Cache"]:::db2
    config --- redis

    jwt["JWT Authentication"]:::securityExternal
    sec --- jwt

    %% Styles
    classDef external fill:#f9e79f,stroke:#333,stroke-width:2px;
    classDef app fill:#d1f2eb,stroke:#333,stroke-width:2px;
    classDef controller fill:#aed6f1,stroke:#333,stroke-width:2px;
    classDef service fill:#abebc6,stroke:#333,stroke-width:2px;
    classDef mapper fill:#f9e79f,stroke:#333,stroke-width:2px;
    classDef model fill:#d7bde2,stroke:#333,stroke-width:2px;
    classDef config fill:#e74c3c,stroke:#333,stroke-width:2px;
    classDef security fill:#fcd5ce,stroke:#333,stroke-width:2px;
    classDef exception fill:#85c1e9,stroke:#333,stroke-width:2px;
    classDef utility fill:#82e0aa,stroke:#333,stroke-width:2px;
    classDef db fill:#f5b041,stroke:#333,stroke-width:2px;
    classDef db2 fill:#f7dc6f,stroke:#333,stroke-width:2px;
    classDef securityExternal fill:#f8c471,stroke:#333,stroke-width:2px;