## What the prompt does
This prompt generates a Mermaid diagram that visualizes the use case of a Flutter application. The diagram includes the actors, use cases, and relationships between them.

## Assumption
- Flutter project is given
- Overview mermaid diagram is given

## How to use the prompt
Using the given Flutter project code — along with the previously generated Mermaid diagram that outlines the app’s navigation and logic flow — analyze the entire system to identify **all main use cases and their sub-use cases**.

From this analysis, create a **Mermaid flowchart** that shows:

* All high-level use cases the app supports (e.g., Authentication, Profile Management, Dashboard Interaction, Data Fetching, Settings, etc.).
* How each use case breaks down into sub-use cases (e.g., Authentication → Login, Signup, Logout, Token Refresh).
* How these use cases depend on each other or trigger one another.
* Connections between use cases as they appear in the actual code (UI actions, state changes, service calls, repository interactions, etc.).
* Any decision points or conditions that influence which sub-use case occurs next.

Format the output as a **clear Mermaid diagram** using `flowchart TD` or `flowchart LR`.
Ensure the flow represents the **real behavior of the code**, not assumptions.

Ask for any missing files if needed to build a complete and accurate use-case hierarchy.
