[Bug] Battery Lua plugin returns empty output

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Description

The battery.2s.lua plugin returns empty output when run, while battery.2s.sh works correctly.

Steps to Reproduce

1. Import battery plugin in Lua variant
2. Run the plugin
3. Output is empty/blank

Expected Behavior

Should output battery level with emoji and iconName attribute, e.g.:

🔋 100% | iconName=battery-level-100-charged-symbolic color=#8be9fd
---
State: charging
Level: 100%
---
Refresh | refresh=true

Actual Behavior

Empty or blank output.

Code Reference

• Plugin: plugins/battery/battery.2s.lua
• Uses crossbarBridge.batterySync() API

Possible Causes

• crossbarBridge global may not be available in Lua runner
• batterySync() may return nil instead of table on some systems
• Error handling may be silently failing

Environment

• OS: Linux
• Lua Runner: embedded lua5x

Related Commits

• bd13db4 (battery plugin update)