fix: Change dashboard port from 5000 to 8080 to avoid Siemens conflict

- Update Flask server to run on port 8080 instead of 5000
- Update frontend API_BASE URL to http://localhost:8080/api
- Update launcher script to open browser at port 8080
- Update README documentation with new port number

This resolves the port conflict with Siemens documentation server.

dashboard/README.md

@@ -41,7 +41,7 @@ python api/app.py
 
 3. Open your browser to:
 ```
-http://localhost:5000
+http://localhost:8080
 ```
 
 ## Quick Start
@@ -58,7 +58,7 @@ cd dashboard
 python api/app.py
 ```
 
-The dashboard will automatically open in your default browser at `http://localhost:5000`
+The dashboard will automatically open in your default browser at `http://localhost:8080`
 
 ## Usage