Core principle: Classify permissions, log operations, ensure security

Detailed plans are as follows:

I. Four-Level Permissions (Tailored to job roles, scalable)

1. General Operator: View device status and order details in assigned areas, receive fault alerts, and submit maintenance requests.

2. Maintenance Staff: Check fault details and maintenance records, update processing progress, and view spare parts inventory.

3. Regional Operations Manager: Access all data in the responsible region, operate devices remotely, approve maintenance requests, and assign work scopes.

4. Super Administrator: Manage all accounts and permissions, modify core settings, view full financial data, and set security rules.

II. Permission Allocation & Account Management

1. Allocate permissions by role or region; support custom addition/removal of permissions.

2. Batch account creation; require complex passwords (e.g., letters + numbers); limit login to max 2 devices per account.

III. Operational Security & Traceability

1. Sensitive operations (e.g., modifying core settings) require SMS/email verification codes or administrator approval.

2. Log all operations (who, when, what was done, result) for at least 1 year.

3. Send alerts for unrecognized device logins or abnormal operations.

IV. Adaptation for Cross-Border Teams

1. Multilingual interface support (English, German, Japanese, etc.).

2. Manage permissions by country-specific groups; isolate data between different countries.

3. Display a "operations will be logged" notice during account registration to comply with GDPR (EU privacy regulation).