troubleshoot: Plugin Diagnostics

Diagnose and resolve issues with insight-wave plugins. This complements cogni-workspace's workspace-status skill, which checks infrastructure (env vars, themes, settings). Troubleshoot focuses on plugin-level and cross-plugin problems.

Language

Read the workspace language from .workspace-config.json in the workspace root (language field — "en" or "de"). Present diagnostic findings, explanations, and fix instructions in that language (Problem → Cause → Fix stays as a pattern, but the content within each section uses the workspace language).

If the file is missing or unreadable, detect the user's language from their message. If still unclear, default to English.