feat(clients): add Lumen KVN client

[krambovic]

Adds Lumen KVN to the clients list.
Lumen KVN is an open-source (GPL-3.0) VPN and proxy client for Windows, powered by Xray and sing-box, with TUN, system proxy, routing, and subscription import support.

Repository: https://github.com/krambovic/Lumen-KVN
Latest release: https://github.com/krambovic/Lumen-KVN/releases/tag/v1.8.5

[greptile-apps]

Greptile Summary

This PR adds Lumen KVN, an open-source Windows VPN/proxy client powered by Xray and sing-box, to the clients list with its logo and metadata.

• Adds a new entry to CLIENTS in src/data/clients.ts with correct id, platforms, downloadLinks, githubRepo, and links fields.
• Adds a new PNG logo at static/clients/logo/lumen-kvn.png; most recent entries use SVG, but PNG is supported throughout the project.

Confidence Score: 4/5

The change is additive and isolated — a new client entry and its logo — with no risk to existing clients or application logic.

The only concern worth a second look is the core: 'xray' field while the description states the app is also powered by sing-box. This could surface a misleading core badge in the UI, but it does not break any functionality.

The core field on the new entry in src/data/clients.ts deserves a quick check to confirm which runtime the app actually exposes to users.

Important Files Changed

Filename	Overview
src/data/clients.ts	Adds the Lumen KVN entry at the end of the CLIENTS array. The entry is structurally valid; minor issue with core: 'xray' while the description also credits sing-box.
static/clients/logo/lumen-kvn.png	New PNG logo file for Lumen KVN. Other recent entries use SVG but PNG is accepted elsewhere in the project.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[clients.ts CLIENTS array] --> B[getClientsByPlatform]
    B --> C{Platform filter}
    C -->|windows| D[Lumen KVN entry]
    D --> E[id: lumen-kvn]
    D --> F[core: xray]
    D --> G[githubRepo: krambovic/Lumen-KVN]
    D --> H[downloadLinks.windows]
    D --> I[logo: lumen-kvn.png]
    D --> J[links.github]

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%%{init: {'theme': 'base', 'themeVariables': {"darkMode": true, "background": "#0d1117", "primaryColor": "#21262d", "primaryTextColor": "#e6edf3", "primaryBorderColor": "#8b949e", "lineColor": "#8b949e", "textColor": "#e6edf3", "edgeLabelBackground": "#161b22", "actorBkg": "#21262d", "actorBorder": "#8b949e", "actorTextColor": "#e6edf3", "actorLineColor": "#8b949e", "signalColor": "#8b949e", "signalTextColor": "#e6edf3", "noteBkgColor": "#373320", "noteBorderColor": "#d4a72c", "noteTextColor": "#f0e6c0", "labelBoxBkgColor": "#21262d", "labelBoxBorderColor": "#8b949e", "labelTextColor": "#e6edf3", "loopTextColor": "#e6edf3", "activationBkgColor": "#30363d", "activationBorderColor": "#8b949e"}}}%%
flowchart TD
    A[clients.ts CLIENTS array] --> B[getClientsByPlatform]
    B --> C{Platform filter}
    C -->|windows| D[Lumen KVN entry]
    D --> E[id: lumen-kvn]
    D --> F[core: xray]
    D --> G[githubRepo: krambovic/Lumen-KVN]
    D --> H[downloadLinks.windows]
    D --> I[logo: lumen-kvn.png]
    D --> J[links.github]

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_{Reviews (1): Last reviewed commit: "feat(clients): add Lumen KVN client" | Re-trigger Greptile}

[krambovic]

Fixed description