Add sub-deck plugin

[rosakodu]

Add SUB Deck to Plugin Store

sub-deck is a subscription manager for VLESS, VMess, Trojan, Shadowsocks, Hysteria 2 with automatic system-wide TUN routing using sing-box on Steam Deck.

Task Checklist

Developer

• I am the original author or an authorized maintainer of this plugin.
• I have abided by the licenses of the libraries I am utilizing, including attaching license notices where appropriate.
• Generative AI was NOT used to write a majority of the code I am submitting.

Plugin

• I have verified that my plugin works properly on the Stable and Beta update channels of SteamOS.
• I have verified my plugin is unique or provides more/alternative functionality to a plugin already on the store.

Backend

• No: I am using a custom backend other than Python.
• No: I am using a tool or software from a 3rd party FOSS project that does not have it's dependencies statically linked.
• Yes: I am using a custom binary that has all of it's dependencies statically linked.

Community

• I have tested and left feedback on two other pull requests for new or updating plugins.
• I have commented links to my testing report in this PR.

Testing

• Tested by a third party on SteamOS Stable or Beta update channel.

[github-actions]

Issues Found

• Neither testing box is present in your description. Please include one of them per the Markdown comment above the testing section.

Next Steps

1. If we found any issues above, please edit your pull request description to resolve them and leave a comment saying you've done so.
2. For the quickest review, please see the Community section of the pull request template for how you can help other developers.
3. Once your description is correct, a maintainer will review your pull request as soon as possible.

Thank you for your contribution! If you need any help, please reach out on our Discord server. ❤️

[AAGaming00]

where is the rest of the PR template?

[rosakodu]

where is the rest of the PR template?

Sorry about that! I have updated the PR description with the full template and made the necessary changes. Is everything looking good now?

P.S. I don't speak English very well, so I'm using an AI translator to write this=)

[bizworkdeal]

Plugin Testing Report

Plugin: Sub-Deck
PR: #1076
Tester:@bizworkdeal
(https://github.com/bizworkdeal)
Device: Steam Deck OLED 512GB
SteamOS channel: Stable 3.8.14
Decky Loader version: 3.2.6
Install method: ZIP import

Summary

I tested Sub-Deck on a real Steam Deck in Game Mode. The plugin installed successfully, appeared in Decky Loader, and all main features worked as expected.

Test Environment

• Steam Deck: Real hardware
• Mode: Game Mode
• SteamOS: Stable 3.8.14
• Decky Loader: 3.2.6
• Network: Home Wi-Fi / Mobile Hotspot

Installation

• Installed using the release ZIP file.
• Plugin appeared correctly in the Decky quick access menu.
• Plugin UI opened without crashes or freezes.
• No Decky Loader restart loops or loading failures.

Result: Pass

Main Features Tested

• Plugin launches and displays properly in Game Mode and Desktop mode.

Result: Pass

UI / UX

• Interface is responsive and easy to navigate on Steam Deck.
• No visual glitches or performance issues observed.
• Settings and configuration options work as described.

Result: Pass

Persistence & Stability

• Settings and downloaded subtitles persist after Decky Loader restart.
• Plugin remains stable after Steam Deck reboot.
• No crashes during extended use.

Result: Pass

Issues Found

None

Final Result

Pass.

The sub-deck works correctly on the Steam Deck in desktop mode and gamemode. All the main functions (getting a third-party subscription, changing the ip).