diff --git a/docs/backend-diagram/apps_screen_functions_dataconnect.xlsx b/docs/backend-diagram/apps_screen_functions_dataconnect.xlsx
new file mode 100644
index 00000000..aa20de1f
Binary files /dev/null and b/docs/backend-diagram/apps_screen_functions_dataconnect.xlsx differ
diff --git a/docs/backend-diagram/client_app_diagram.mmd b/docs/backend-diagram/client_app_diagram.mmd
new file mode 100644
index 00000000..38d4868c
--- /dev/null
+++ b/docs/backend-diagram/client_app_diagram.mmd
@@ -0,0 +1,74 @@
+flowchart LR
+
+subgraph C1["Login"]
+  S_client_sign_in["client_sign_in_screen.dart"]
+  S_client_sign_in --> S_client_sign_in_Q["Queries<br/>* user - getUserById<br/>* business - getBusinessesByUserId"]
+  S_client_sign_in --> S_client_sign_in_F["Firebase<br/>* user - auth"]
+end
+
+subgraph C2["Create account"]
+  S_client_sign_up["client_sign_up_screen.dart"]
+  S_client_sign_up --> S_client_sign_up_Q["Queries<br/>* business - getBusinessesByUserId"]
+  S_client_sign_up --> S_client_sign_up_M["Mutations<br/>* user - createUser<br/>* business - createBusiness"]
+end
+
+subgraph C3["Edit account"]
+  S_edit_account_na["manual_or_unknown_screen.dart"]
+  S_edit_account_na --> S_edit_account_na_M["Mutations<br/>* business - updateBusiness"]
+end
+
+subgraph C4["Profile"]
+  S_client_settings["client_settings_screen.dart"]
+  S_client_settings --> S_client_settings_Q["Queries<br/>* user - getUserById<br/>* business - getBusinessesByUserId"]
+end
+
+subgraph C5["Hubs"]
+  S_client_hubs["client_hubs_screen.dart"]
+  S_client_hubs --> S_client_hubs_Q["Queries<br/>* hub - getHubsByOwnerId"]
+  S_client_hubs --> S_client_hubs_M["Mutations<br/>* hub - createHub<br/>* hub - updateHub<br/>* hub - deleteHub"]
+end
+
+subgraph C6["Orders"]
+  S_client_shifts["client_shifts_screen.dart"]
+  S_client_shifts --> S_client_shifts_Q["Queries<br/>* order - getOrdersByOwnerId"]
+end
+
+subgraph C7["RAPID Order"]
+  S_rapid_order["rapid_order_flow_page.dart"]
+  S_rapid_order --> S_rapid_order_M["Mutations<br/>* order - createOrder"]
+end
+
+subgraph C8["One-time Order"]
+  S_one_time["one_time_order_flow_page.dart"]
+  S_one_time --> S_one_time_Q["Queries<br/>* role - listRolesByOwnerId"]
+  S_one_time --> S_one_time_M["Mutations<br/>* position - createPosition<br/>* order - createOrder"]
+end
+
+subgraph C9["Permanent Placement"]
+  S_permanent["permanent_order_flow_page.dart"]
+  S_permanent --> S_permanent_Q["Queries<br/>* role - listRolesByOwnerId"]
+  S_permanent --> S_permanent_M["Mutations<br/>* position - createPosition<br/>* order - createOrder"]
+end
+
+subgraph C10["Recurring Order"]
+  S_recurring["recurring_order_flow_page.dart"]
+  S_recurring --> S_recurring_Q["Queries<br/>* role - listRolesByOwnerId"]
+  S_recurring --> S_recurring_M["Mutations<br/>* position - createPosition<br/>* order - createOrder"]
+end
+
+subgraph C11["Billing"]
+  S_billing["client_billing_screen.dart"]
+  S_billing --> S_billing_Q["Queries<br/>* account - getAccountsByOwnerId<br/>* invoice - getInvoicesByOwnerId<br/>* recentPayment - filterRecentPayments"]
+  S_billing --> S_billing_M["Mutations<br/>* account - createAccount<br/>* account - updateAccount<br/>* account - deleteAccount"]
+end
+
+subgraph C12["Coverage"]
+  S_coverage["coverage_dashboard.dart"]
+  S_coverage --> S_coverage_Q["Queries<br/>* order - getOrdersByOwnerId<br/>* shift - filterShifts<br/>* application - getApplicationsByShiftId"]
+end
+
+subgraph C13["Home"]
+  S_client_home["client_home_screen.dart"]
+  S_client_home --> S_client_home_Q["Queries<br/>* order - getOrdersByOwnerId<br/>* shift - filterShifts<br/>* application - getApplicationsByShiftId<br/>* recentPayment - filterRecentPayments"]
+  S_client_home --> S_client_home_M["Mutations<br/>* order - createOrder"]
+end
diff --git a/docs/backend-diagram/dataconnect-schema.mmd b/docs/backend-diagram/dataconnect-schema.mmd
new file mode 100644
index 00000000..b67267f0
--- /dev/null
+++ b/docs/backend-diagram/dataconnect-schema.mmd
@@ -0,0 +1,271 @@
+erDiagram
+    User {
+        String id PK
+        String email
+        String fullName
+        Timestamp createdDate
+    }
+    Business {
+        UUID id PK
+        String userId FK
+        String businessName
+        Timestamp createdAt
+    }
+    Vendor {
+        UUID id PK
+        String userId FK
+        String companyName
+        Timestamp createdAt
+    }
+    Staff {
+        UUID id PK
+        String userId FK
+        UUID hubId FK
+        UUID ownerId FK
+        String fullName
+        Timestamp createdAt
+    }
+    Shift {
+        UUID id PK
+        UUID orderId FK
+        UUID ownerId FK
+        ShiftStatus status
+        Timestamp createdAt
+    }
+    Order {
+        UUID id PK
+        UUID ownerId FK
+        UUID hubId FK
+        OrderStatus status
+        Timestamp createdAt
+    }
+    Position {
+        UUID id PK
+        UUID orderId FK
+        UUID roleId FK
+        UUID ownerId FK
+        Timestamp createdAt
+    }
+    Task {
+        UUID id PK
+        UUID ownerId FK
+        TaskStatus status
+        Timestamp createdAt
+    }
+    Team {
+        UUID id PK
+        String ownerId FK
+        String teamName
+        Timestamp createdAt
+    }
+    TeamMember {
+        UUID id PK
+        UUID teamId FK
+        UUID hubId FK
+        String memberName
+        Timestamp createdAt
+    }
+    Hub {
+        UUID id PK
+        UUID ownerId FK
+        String name
+        Timestamp createdAt
+    }
+    Account {
+        UUID id PK
+        UUID ownerId FK "polymorphic ownerId"
+        String bank
+        Timestamp createdAt
+    }
+    Document {
+        UUID id PK
+        UUID staffId FK
+        DocumentStatus status
+        Timestamp createdAt
+    }
+    Certificate {
+        UUID id PK
+        UUID staffId FK
+        CertificateStatus status
+        Timestamp createdAt
+    }
+    Contact {
+        UUID id PK
+        UUID staffId FK
+        String name
+        Timestamp createdAt
+    }
+    BenefitsData {
+        UUID id PK
+        UUID staffId FK
+        String title
+        Timestamp createdAt
+    }
+    Course {
+        UUID id PK
+        String title
+        Timestamp createdAt
+    }
+    TaxForm {
+        UUID id PK
+        UUID staffId FK
+        TaxFormStatus status
+        Timestamp createdAt
+    }
+    TimeSheet {
+        UUID id PK
+        UUID staffId FK
+        UUID shiftId FK
+        TimeSheetStatus status
+        Timestamp createdAt
+    }
+    Invoice {
+        UUID id PK
+        UUID ownerId FK
+        InvoiceStatus status
+        Timestamp createdAt
+    }
+    Assignment {
+        UUID id PK
+        UUID staffId FK
+        UUID ownerId FK
+        AssignmentStatus status
+        Timestamp createdAt
+    }
+    Conversation {
+        UUID id PK
+        String subject
+        Timestamp createdAt
+    }
+    Message {
+        UUID id PK
+        UUID conversationId FK
+        String senderId
+        Timestamp createdAt
+    }
+    Role {
+        UUID id PK
+        UUID ownerId FK
+        String name
+        Timestamp createdAt
+    }
+    RecentPayment {
+        UUID id PK
+        UUID payedUserId FK
+        UUID ownerId FK
+        RecentPaymentStatus status
+        Timestamp createdAt
+    }
+    RequiredDoc {
+        UUID id PK
+        UUID ownerId FK
+        ReqDocumentStatus status
+        Timestamp createdAt
+    }
+    VendorRate {
+        UUID id PK
+        UUID vendorId FK
+        String roleName
+        Timestamp createdAt
+    }
+    Schedule {
+        UUID id PK
+        UUID positionId FK
+        Timestamp createdAt
+    }
+    TaskComment {
+        UUID id PK
+        UUID taskId FK
+        String authorName
+        Timestamp createdAt
+    }
+    TeamHub {
+        UUID id PK
+        UUID teamId FK
+        String hubName
+        Timestamp createdAt
+    }
+    Application {
+        UUID id PK
+        UUID shiftId FK
+        UUID staffId FK
+        ApplicationStatus status
+        Timestamp createdAt
+    }
+    StaffShift {
+        UUID id PK
+        UUID staffId FK
+        UUID shiftId FK
+        Timestamp createdAt
+    }
+    MemberTask {
+        UUID id PK
+        UUID teamMemberId FK
+        UUID taskId FK
+        Timestamp createdAt
+    }
+    StaffCourse {
+        UUID id PK
+        UUID staffId FK
+        UUID courseId FK
+        Timestamp createdAt
+    }
+
+    User ||--|{ Staff : "has profile"
+    User ||--|{ Vendor : "can be"
+    User ||--|{ Business : "can be"
+    User ||--o{ ActivityLog : "generates"
+
+    Business ||--o{ "Order" : "creates"
+    Business ||--o{ Invoice : "receives"
+    Business ||--o{ Task : "owns"
+    Business ||--o{ Hub : "owns"
+    Business ||--o{ Role : "defines"
+    Business ||--o{ Shift : "posts"
+    Business ||--o{ Staff : "employs"
+    Business ||--o{ Account : "owns"
+    
+    Vendor ||--o{ VendorRate : "defines"
+    Vendor ||--o{ Task : "owns"
+    Vendor ||--o{ Hub : "owns"
+    Vendor ||--o{ Role : "defines"
+    Vendor ||--o{ Shift : "posts"
+    Vendor ||--o{ Staff : "employs"
+    Vendor ||--o{ Account : "owns"
+
+    Staff ||--o{ Document : "has"
+    Staff ||--o{ Certificate : "holds"
+    Staff ||--o{ Contact : "has emergency"
+    Staff ||--o{ BenefitsData : "accrues"
+    Staff ||--o{ TaxForm : "submits"
+    Staff ||--o{ TimeSheet : "fills"
+    Staff ||--o{ Assignment : "receives"
+    Staff ||--o{ Account : "owns"
+    Staff ||--o{ RecentPayment : "is paid to"
+    Staff ||--o{ RequiredDoc : "owns"
+    Staff ||--o{ Application : "submits"
+    Hub ||--o{ Staff : "is based at"
+    
+    Shift ||--o{ TimeSheet : "generates"
+    Shift ||--o{ Application : "receives"
+    
+    "Order" ||--o{ Shift : "contains"
+    "Order" ||--o{ Position : "requires"
+
+    Task ||--o{ TaskComment : "has"
+
+    Team ||--o{ TeamMember : "has"
+    Team ||--o{ TeamHub : "operates in"
+    
+    Conversation ||--o{ Message : "contains"
+    
+    Position ||--o{ Schedule : "has"
+    Role ||--o{ Position : "is for"
+
+    %% Join Tables
+    Staff ||--|{ StaffShift : "works"
+    Shift ||--|{ StaffShift : "is worked by"
+    Staff ||--|{ StaffCourse : "enrolls in"
+    Course ||--|{ StaffCourse : "is taken by"
+    TeamMember ||--|{ MemberTask : "assigned to"
+    Task ||--|{ MemberTask : "is assigned to"
diff --git a/docs/backend-diagram/dataconnect-schemas-mutations-queries.mmd b/docs/backend-diagram/dataconnect-schemas-mutations-queries.mmd
new file mode 100644
index 00000000..f241b3a5
--- /dev/null
+++ b/docs/backend-diagram/dataconnect-schemas-mutations-queries.mmd
@@ -0,0 +1,124 @@
+flowchart LR
+    subgraph "Profile & Onboarding"
+        User --> User_Q["Queries<br/>- listUsers<br/>- getUserById"]
+        User --> User_M["Mutations<br/>- createUser<br/>- updateUser<br/>- deleteUser"]
+        Staff --> Staff_Q["Queries<br/>- listStaff<br/>- getStaffById<br/>- getStaffByUserId"]
+        Staff --> Staff_M["Mutations<br/>- createStaff<br/>- updateStaff<br/>- deleteStaff"]
+        Contact --> Contact_Q["Queries<br/>- listContacts<br/>- getContactById<br/>- listContactsByStaffId"]
+        Contact --> Contact_M["Mutations<br/>- createContact<br/>- updateContact<br/>- deleteContact"]
+        AttireOption --> AttireOption_Q["Queries<br/>- listAttireOptions<br/>- getAttireOptionById"]
+        AttireOption --> AttireOption_M["Mutations<br/>- createAttireOption<br/>- updateAttireOption<br/>- deleteAttireOption"]
+    end
+
+    subgraph "Compliance"
+        Document --> Document_Q["Queries<br/>- listDocuments<br/>- getDocumentById<br/>- listDocumentsByStaffId"]
+        Document --> Document_M["Mutations<br/>- createDocument<br/>- updateDocument<br/>- deleteDocument"]
+        Certificate --> Certificate_Q["Queries<br/>- listCertificates<br/>- getCertificateById<br/>- listCertificatesByStaffId"]
+        Certificate --> Certificate_M["Mutations<br/>- CreateCertificate<br/>- UpdateCertificate<br/>- DeleteCertificate"]
+        TaxForm --> TaxForm_Q["Queries<br/>- listTaxForms<br/>- getTaxFormById<br/>- getTaxFormsByStaffId<br/>- filterTaxForms"]
+        TaxForm --> TaxForm_M["Mutations<br/>- createTaxForm<br/>- updateTaxForm<br/>- deleteTaxForm"]
+        RequiredDoc --> RequiredDoc_Q["Queries<br/>- listRequiredDocs<br/>- getRequiredDocById<br/>- listRequiredDocsByUserId"]
+        RequiredDoc --> RequiredDoc_M["Mutations<br/>- createRequiredDoc<br/>- updateRequiredDoc<br/>- deleteRequiredDoc"]
+    end
+
+    subgraph "Finances"
+        Account --> Account_Q["Queries<br/>- listAccounts<br/>- getAccountById<br/>- listAccountsByOwnerId"]
+        Account --> Account_M["Mutations<br/>- createAccount<br/>- updateAccount<br/>- deleteAccount"]
+        TimeSheet --> TimeSheet_Q["Queries<br/>- listTimeSheets<br/>- getTimeSheetById<br/>- listTimeSheetsByStaffId"]
+        TimeSheet --> TimeSheet_M["Mutations<br/>- createTimeSheet<br/>- updateTimeSheet<br/>- deleteTimeSheet"]
+        RecentPayment --> RecentPayment_Q["Queries<br/>- listRecentPayments<br/>- getRecentPaymentById<br/>- listRecentPaymentsByUserId"]
+        RecentPayment --> RecentPayment_M["Mutations<br/>- createRecentPayment<br/>- updateRecentPayment<br/>- deleteRecentPayment"]
+        Invoice --> Invoice_Q["Queries<br/>- listInvoices<br/>- getInvoiceById"]
+        Invoice --> Invoice_M["Mutations<br/>- createInvoice<br/>- updateInvoice<br/>- deleteInvoice"]
+        InvoiceTemplate --> InvoiceTemplate_Q["Queries<br/>- listInvoiceTemplates<br/>- getInvoiceTemplateById"]
+        InvoiceTemplate --> InvoiceTemplate_M["Mutations<br/>- createInvoiceTemplate<br/>- updateInvoiceTemplate<br/>- deleteInvoiceTemplate"]
+        VendorRate --> VendorRate_Q["Queries<br/>- listVendorRates<br/>- getVendorRateById"]
+        VendorRate --> VendorRate_M["Mutations<br/>- createVendorRate<br/>- updateVendorRate<br/>- deleteVendorRate"]
+        CustomRateCard --> CustomRateCard_Q["Queries<br/>- listCustomRateCards<br/>- getCustomRateCardById"]
+        CustomRateCard --> CustomRateCard_M["Mutations<br/>- createCustomRateCard<br/>- updateCustomRateCard<br/>- deleteCustomRateCard"]
+    end
+
+    subgraph "Shifts & Work"
+        Shift --> Shift_Q["Queries<br/>- listShifts<br/>- getShiftById<br/>- filterShifts"]
+        Shift --> Shift_M["Mutations<br/>- CreateShift<br/>- UpdateShift<br/>- DeleteShift"]
+        Application --> Application_Q["Queries<br/>- getApplicationById<br/>- listApplicationsByStaffId"]
+        Application --> Application_M["Mutations<br/>- createApplication<br/>- updateApplication<br/>- deleteApplication"]
+        StaffShift --> StaffShift_Q["Queries<br/>- getMyShifts<br/>- getStaffShiftById<br/>- getStaffShiftsByShiftId"]
+        StaffShift --> StaffShift_M["Mutations<br/>- createStaffShift<br/>- updateStaffShift<br/>- deleteStaffShift"]
+        StaffAvailability --> StaffAvailability_Q["Queries<br/>- listStaffAvailabilities<br/>- getStaffAvailabilityById<br/>- getStaffAvailabilityByStaffId"]
+        StaffAvailability --> StaffAvailability_M["Mutations<br/>- createStaffAvailability<br/>- updateStaffAvailability<br/>- deleteStaffAvailability"]
+        Assignment --> Assignment_Q["Queries<br/>- listAssignments<br/>- getAssignmentById<br/>- listAssignmentsByStaffId"]
+        Assignment --> Assignment_M["Mutations<br/>- CreateAssignment<br/>- UpdateAssignment<br/>- DeleteAssignment"]
+        Order --> Order_Q["Queries<br/>- listOrders<br/>- getOrderById"]
+        Order --> Order_M["Mutations<br/>- createOrder<br/>- updateOrder<br/>- deleteOrder"]
+        Position --> Position_Q["Queries<br/>- listPositions<br/>- getPositionById<br/>- listPositionsByOrderId"]
+        Position --> Position_M["Mutations<br/>- createPosition<br/>- updatePosition<br/>- deletePosition"]
+        Category --> Category_Q["Queries<br/>- listCategories<br/>- getCategoryById"]
+        Category --> Category_M["Mutations<br/>- createCategory<br/>- updateCategory<br/>- deleteCategory"]
+        Role --> Role_Q["Queries<br/>- listRoles<br/>- getRoleById"]
+        Role --> Role_M["Mutations<br/>- createRole<br/>- updateRole<br/>- deleteRole"]
+        RoleCategory --> RoleCategory_Q["Queries<br/>- listRoleCategories<br/>- getRoleCategoryById"]
+        RoleCategory --> RoleCategory_M["Mutations<br/>- createRoleCategory<br/>- updateRoleCategory<br/>- deleteRoleCategory"]
+        Schedule --> Schedule_Q["Queries<br/>- listSchedules<br/>- getScheduleById<br/>- getScheduleByPositionId"]
+        Schedule --> Schedule_M["Mutations<br/>- createSchedule<br/>- updateSchedule<br/>- deleteSchedule"]
+        Workforce --> Workforce_Q["Queries"]
+        Workforce --> Workforce_M["Mutations"]
+    end
+
+    subgraph "Learning"
+        Course --> Course_Q["Queries<br/>- listCourses<br/>- getCourseById<br/>- filterCourses"]
+        Course --> Course_M["Mutations<br/>- createCourse<br/>- updateCourse<br/>- deleteCourse"]
+        Level --> Level_Q["Queries<br/>- listLevels<br/>- getLevelById"]
+        Level --> Level_M["Mutations<br/>- createLevel<br/>- updateLevel<br/>- deleteLevel"]
+        StaffCourse --> StaffCourse_Q["Queries<br/>- getStaffCourseById<br/>- listStaffCoursesByStaffId<br/>- listStaffCoursesByCourseId<br/>- getStaffCourseByStaffAndCourse"]
+        StaffCourse --> StaffCourse_M["Mutations<br/>- createStaffCourse<br/>- updateStaffCourse<br/>- deleteStaffCourse"]
+    end
+
+    subgraph "Benefits"
+        BenefitsData --> BenefitsData_Q["Queries<br/>- listBenefitsData<br/>- getBenefitsDataById<br/>- getBenefitsDataByStaffId"]
+        BenefitsData --> BenefitsData_M["Mutations<br/>- createBenefitsData<br/>- updateBenefitsData<br/>- deleteBenefitsData"]
+    end
+    
+    subgraph "Business & Vendors"
+        Business --> Business_Q["Queries<br/>- listBusinesses<br/>- getBusinessById<br/>- getBusinessesByUserId"]
+        Business --> Business_M["Mutations<br/>- createBusiness<br/>- updateBusiness<br/>- deleteBusiness"]
+        Vendor --> Vendor_Q["Queries<br/>- listVendors<br/>- getVendorById"]
+        Vendor --> Vendor_M["Mutations<br/>- createVendor<br/>- updateVendor<br/>- deleteVendor"]
+        Hub --> Hub_Q["Queries<br/>- listHubs<br/>- getHubById"]
+        Hub --> Hub_M["Mutations<br/>- createHub<br/>- updateHub<br/>- deleteHub"]
+    end
+    
+    subgraph "Teams"
+        Team --> Team_Q["Queries<br/>- listTeams<br/>- getTeamById"]
+        Team --> Team_M["Mutations<br/>- createTeam<br/>- updateTeam<br/>- deleteTeam"]
+        TeamMember --> TeamMember_Q["Queries<br/>- listTeamMembers<br/>- getTeamMemberById<br/>- listTeamMembersByTeamId"]
+        TeamMember --> TeamMember_M["Mutations<br/>- createTeamMember<br/>- updateTeamMember<br/>- deleteTeamMember"]
+        MemberTask --> MemberTask_Q["Queries<br/>- getMyTasks<br/>- getMemberTaskById<br/>- getMemberTasksByTaskId"]
+        MemberTask --> MemberTask_M["Mutations<br/>- createMemberTask<br/>- updateMemberTask<br/>- deleteMemberTask"]
+        TeamHub --> TeamHub_Q["Queries<br/>- listTeamHubs<br/>- getTeamHubById<br/>- listTeamHubsByTeamId"]
+        TeamHub --> TeamHub_M["Mutations<br/>- createTeamHub<br/>- updateTeamHub<br/>- deleteTeamHub"]
+        Task --> Task_Q["Queries<br/>- listTasks<br/>- getTaskById"]
+        Task --> Task_M["Mutations<br/>- createTask<br/>- updateTask<br/>- deleteTask"]
+        TaskComment --> TaskComment_Q["Queries<br/>- listTaskComments<br/>- getTaskCommentById<br/>- listTaskCommentsByTaskId"]
+        TaskComment --> TaskComment_M["Mutations<br/>- createTaskComment<br/>- updateTaskComment<br/>- deleteTaskComment"]
+    end
+
+    subgraph "Communication"
+        Conversation --> Conversation_Q["Queries<br/>- listConversations<br/>- getConversationById<br/>- getConversationsByUserId"]
+        Conversation --> Conversation_M["Mutations<br/>- createConversation<br/>- updateConversation<br/>- deleteConversation"]
+        Message --> Message_Q["Queries<br/>- listMessages<br/>- getMessageById<br/>- listMessagesByConversationId"]
+        Message --> Message_M["Mutations<br/>- createMessage<br/>- updateMessage<br/>- deleteMessage"]
+    end
+
+    subgraph "Others"
+        ActivityLog --> ActivityLog_Q["Queries<br/>- listActivityLogs<br/>- getActivityLogById<br/>- listActivityLogsByUserId"]
+        ActivityLog --> ActivityLog_M["Mutations<br/>- createActivityLog<br/>- updateActivityLog<br/>- deleteActivityLog"]
+        ClientFeedback --> ClientFeedback_Q["Queries<br/>- listClientFeedbacks<br/>- getClientFeedbackById"]
+        ClientFeedback --> ClientFeedback_M["Mutations<br/>- createClientFeedback<br/>- updateClientFeedback<br/>- deleteClientFeedback"]
+        FaqData --> FaqData_Q["Queries<br/>- listFaqDatas<br/>- getFaqDataById"]
+        FaqData --> FaqData_M["Mutations<br/>- createFaqData<br/>- updateFaqData<br/>- deleteFaqData"]
+    end
+
+    subgraph "Reporting"
+        Reports --> Reports_Q["Queries<br/>- getCoverageReport<br/>- getNoShowReport<br/>- getSpendReport<br/>- getForecastReport<br/>- getPerformanceReport<br/>- getDailyOpsReport"]
+    end
diff --git a/docs/backend-diagram/staff_app_diagram.mmd b/docs/backend-diagram/staff_app_diagram.mmd
new file mode 100644
index 00000000..d251a18e
--- /dev/null
+++ b/docs/backend-diagram/staff_app_diagram.mmd
@@ -0,0 +1,121 @@
+flowchart LR
+
+subgraph L1["login/create user"]
+  S_auth_phone["phone_verification_screen.dart"]
+  S_auth_phone --> S_auth_phone_Q["Queries<br/>* user - getUserById<br/>* staff - getStaffByUserId"]
+  S_auth_phone --> S_auth_phone_M["Mutations<br/>* user - createUser"]
+  S_auth_phone --> S_auth_phone_F["Firebase<br/>* user - auth"]
+end
+
+subgraph L2["Profile"]
+  S_worker_profile["worker_profile_screen.dart"]
+  S_worker_profile --> S_worker_profile_Q["Queries<br/>* user - getUserById<br/>* staff - getStaffByUserId"]
+end
+
+subgraph L3["Personal info"]
+  S_personal_info["personal_info_screen.dart"]
+  S_personal_info --> S_personal_info_Q["Queries<br/>* staff - getStaffByUserId"]
+  S_personal_info --> S_personal_info_M["Mutations<br/>* staff - UpdateStaff"]
+end
+
+subgraph L4["Emergency Contact"]
+  S_emergency["emergency_contact_screen.dart"]
+  S_emergency --> S_emergency_Q["Queries<br/>* contact - getContactsByStaffId"]
+  S_emergency --> S_emergency_M["Mutations<br/>* contact - updateContact<br/>* contact - createContact<br/>* contact - deleteContact"]
+end
+
+subgraph L5["Experience & skills"]
+  S_experience["experience_screen.dart"]
+  S_experience --> S_experience_Q["Queries<br/>* staff - getStaffByUserId"]
+  S_experience --> S_experience_M["Mutations<br/>* staff - UpdateStaff"]
+end
+
+subgraph L6["Attire"]
+  S_attire["attire_screen.dart"]
+  S_attire --> S_attire_Q["Queries<br/>* attireOption - listAttireOptions<br/>* staff - getStaffByUserId"]
+  S_attire --> S_attire_M["Mutations<br/>* staff - UpdateStaff"]
+end
+
+subgraph L7["Documents"]
+  S_documents["documents_screen.dart"]
+  S_documents --> S_documents_Q["Queries<br/>* document - getDocumentsByStaffId"]
+  S_documents --> S_documents_M["Mutations<br/>* document - updateDocument"]
+end
+
+subgraph L8["Certificates"]
+  S_certificates["certificates_screen.dart"]
+  S_certificates --> S_certificates_Q["Queries<br/>* certificate - listCertificatesByStaffId"]
+  S_certificates --> S_certificates_M["Mutations<br/>* certificate - UpdateCertificate<br/>* certificate - CreateCertificate<br/>* certificate - DeleteCertificate"]
+end
+
+subgraph L9["Tax Documents"]
+  S_tax_forms["tax_forms_screen.dart"]
+  S_tax_forms --> S_tax_forms_Q["Queries<br/>* taxForm - getTaxFormsBystaffId"]
+  S_tax_forms --> S_tax_forms_M["Mutations<br/>* taxForm - createTaxForm<br/>* taxForm - updateTaxForm"]
+end
+
+subgraph L10["KROW University"]
+  S_uni["krow_university_screen.dart"]
+  S_uni --> S_uni_Q["Queries<br/>* course - listCourses<br/>* staffCourse - listStaffCoursesByStaffId<br/>* staff - getStaffByUserId<br/>* level - listLevels<br/>* certificate - listCertificatesByStaffId"]
+end
+
+subgraph L11["Trainings"]
+  S_trainings["trainings_screen.dart"]
+  S_trainings --> S_trainings_Q["Queries<br/>* course - listCourses<br/>* staffCourse - listStaffCoursesByStaffId"]
+end
+
+subgraph L12["Leaderboard"]
+  S_leaderboard["leaderboard_screen.dart"]
+  S_leaderboard --> S_leaderboard_Q["Queries<br/>* staffCourse - missing"]
+end
+
+subgraph L13["Bank Account"]
+  S_bank["bank_account_screen.dart"]
+  S_bank --> S_bank_Q["Queries<br/>* account - getAccountsByOwnerId"]
+  S_bank --> S_bank_M["Mutations<br/>* account - createAccount<br/>* account - updateAccount<br/>* account - deleteAccount"]
+end
+
+subgraph L14["Earnings/Payments"]
+  S_payments["payments_screen.dart"]
+  S_payments --> S_payments_Q["Queries<br/>* recentPayment - getRecentPaymentsByPayedUserId"]
+end
+
+subgraph L15["Timecard"]
+  S_timecard["time_card_screen.dart"]
+  S_timecard --> S_timecard_Q["Queries<br/>* timeSheet - getTimeSheetsByStaffId"]
+end
+
+subgraph L16["Clock in"]
+  S_clockin["clock_in_screen.dart"]
+  S_clockin --> S_clockin_Q["Queries<br/>* application - getApplicationsByStaffId"]
+  S_clockin --> S_clockin_M["Mutations<br/>* application - createApplication<br/>* application - updateApplicationStatus"]
+end
+
+subgraph L17["Shifts"]
+  S_shifts["shifts_screen.dart"]
+  S_shifts --> S_shifts_Q["Queries<br/>* application - getApplicationsByStaffId<br/>* shift - filterShifts<br/>* timeSheet - getTimeSheetsByStaffId"]
+  S_shifts --> S_shifts_M["Mutations<br/>* application - updateApplicationStatus<br/>* shift - CreateShift<br/>* application - createApplication<br/>* staffShift - createStaffShift"]
+end
+
+subgraph L18["My availability"]
+  S_availability["availability_screen.dart"]
+  S_availability --> S_availability_Q["Queries<br/>* staffAvailability - getStaffAvailabilityByStaffId"]
+  S_availability --> S_availability_M["Mutations<br/>* staffAvailability - updateStaffAvailability<br/>* staffAvailability - createStaffAvailability<br/>* staffAvailability - deleteStaffAvailability"]
+end
+
+subgraph L19["Your Benefits Overview"]
+  S_benefits["benefits_screen.dart"]
+  S_benefits --> S_benefits_Q["Queries<br/>* benefitsData - getBenefitsDataByStaffId"]
+  S_benefits --> S_benefits_M["Mutations<br/>* benefitsData - updateBenefitsData"]
+end
+
+subgraph L20["Home"]
+  S_home["worker_home_screen.dart"]
+  S_home --> S_home_Q["Queries<br/>* application - getApplicationsByStaffId<br/>* shift - filterShifts<br/>* benefitsData - getBenefitsDataByStaffId"]
+end
+
+subgraph L21["Shift detail"]
+  S_shift_detail["shift_details_screen.dart"]
+  S_shift_detail --> S_shift_detail_Q["Queries<br/>* application - getApplicationsByStaffId"]
+  S_shift_detail --> S_shift_detail_M["Mutations<br/>* application - updateApplicationStatus"]
+end