Bug: Steam plugin fails with Cannot read properties of undefined (reading 'join')

[mogumc]

Description

When using lowlighter/metrics@latest with Steam plugin enabled, rendering fails after 3 retry attempts. The error occurs in steam.ejs line 56 at <%= genres.join(", ") %>. The variable genres is undefined for one of the fetched Steam games.

Steps to reproduce

1. Setup GitHub Actions workflow with lowlighter/metrics@latest
2. Enable Steam plugin, configure Steam token and user ID
3. Run workflow

Expected behavior

Metrics SVG should render successfully. If a Steam game has no genre data, skip or fallback to empty string instead of crashing the whole render.

Actual behavior

Render crashes with EJS template error:

Cannot read properties of undefined (reading 'join')

Full trace points to /metrics/source/templates/classic/partials/steam.ejs:56

Environment

• Action: lowlighter/metrics v3.34.0
• Runner: Ubuntu GitHub Actions runner
• Plugin: Steam (player, recently-played sections enabled)

Proposed fix

Add null/undefined check before calling .join() on genres array in steam.ejs template:

<%= genres ? genres.join(", ") : "" %>

[mogumc]

Steam no longer returns genres for all games. Some popular titles such as CS2 do not include the genres field in their API response.