added UI with mermaid(3)

Author: arinkulshi-skylight

user_guide.md

@@ -36,20 +36,9 @@ flowchart TD
     B --> C[OCR API]
     B --> D[Data Storage - Postgres]
     C --> D
-
-    %% Add notes for clarification
-    A:::ui_style
-    B:::backend_style
-    C:::ocr_style
-    D:::storage_style
-
-    %% Define custom styles for better visualization
-    classDef ui_style fill:#f9f,stroke:#333,stroke-width:2px;
-    classDef backend_style fill:#ffa,stroke:#333,stroke-width:2px;
-    classDef ocr_style fill:#aff,stroke:#333,stroke-width:2px;
-    classDef storage_style fill:#aaf,stroke:#333,stroke-width:2px;
 ```
 
+
 The **ReportVision** application is composed of the following core components:
 
 ## Components