add method to create a party + lobby dto

[angelayu0530]

-created a joincode generator ( will be replaced later)

• wrote the endpoint to make a lobby with the creator in the lobby + returning the joincode
• wrote lobby dto

[Copilot]

Pull Request Overview

This PR implements lobby creation functionality for the duel/party system, enabling users to create lobbies with unique join codes that other players can use to join games.

Key Changes:

• Introduced PartyCodeGenerator utility for generating 6-character alphanumeric join codes with collision detection
• Added LobbyDto for structured lobby data transfer
• Implemented the createParty endpoint in DuelController that creates a lobby and associates the creator as the first player

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 5 comments.

File	Description
PartyCodeGenerator.java	New utility class for generating unique random party codes with configurable retry logic
LobbyDto.java	New DTO that maps Lobby entities to API response format with all relevant fields
DuelController.java	Added createParty endpoint with authentication, duplicate lobby checks, and lobby/player creation logic

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[github-actions]

Overall Project	63.05% -0.81%	🍏
Files changed	6.75%	❌

File	Coverage
DuelController.java	13.43% -56.72%	❌
LobbyDto.java	0%	❌
PartyCodeGenerator.java	0%	❌

[github-actions]

Overall Project	62.66% -0.8%	🍏
Files changed	6.83%	❌

File	Coverage
DuelController.java	13.43% -56.72%	❌
LobbyDto.java	0%	❌
PartyCodeGenerator.java	0%	❌

[Copilot]

Pull Request Overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 9 comments.

---

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[github-actions]

Overall Project	63.44% -0.81%	🍏
Files changed	6.75%	❌

File	Coverage
DuelController.java	13.24% -57.35%	❌
LobbyDto.java	0%	❌
PartyCodeGenerator.java	0%	❌

[github-actions]

Overall Project	63.06% -0.78%	🍏
Files changed	5.16%	❌

File	Coverage
DuelController.java	11.72% -57.03%	❌
LobbyDto.java	0%	❌
PartyCodeGenerator.java	0%	❌

[github-actions]

Overall Project	63.16% -0.63%	🍏
Files changed	6.35%	❌

File	Coverage
DuelController.java	12.82% -52.99%	❌
LobbyDto.java	0%	❌
PartyCodeGenerator.java	0%	❌

[github-actions]

Overall Project	63.23% -0.63%	🍏
Files changed	6.35%	❌

File	Coverage
DuelController.java	12.82% -52.99%	❌
LobbyDto.java	0%	❌
PartyCodeGenerator.java	0%	❌

[github-actions]

Overall Project	63.77% -0.14%	🍏
Files changed	78.57%	❌

File	Coverage
PartyCodeGenerator.java	90.63% -9.38%	🍏
DuelController.java	74.36%	🍏
LobbyDto.java	0%	❌

[github-actions]

Overall Project	63.73% -0.13%	🍏
Files changed	74.47%	❌

File	Coverage
DuelController.java	74.36%	🍏
LobbyDto.java	0%	❌

[github-actions]

Overall Project	64.28% -0.13%	🍏
Files changed	74.47%	❌

File	Coverage
DuelController.java	74.36%	🍏
LobbyDto.java	0%	❌