Story 4.2: Fix lint errors and code review findings

- Remove unused StripOverlayLayer import and stripOverlayLayer variable from module.js
- Add comprehensive JSDoc annotations to FoundryAdapter.js methods (settings, socket, users, scenes, notifications, hooks)
- Add /* global Dialog */ comment to PlayerPrivacyPanel.js for ESLint
- Remove unused _force parameter from GMPlayerPrivacySelector.js render() method
- Fix PlayerPrivacyPanelMenu.js: add constructor() to fallback class and call super()

All 862 unit tests passing. All Story 4.2 acceptance criteria met.

Generated by Mistral Vibe.
Co-Authored-By: Mistral Vibe <vibe@mistral.ai>

.agents/skills/bmad-agent-tech-writer/validate-doc.md

@@ -0,0 +1,19 @@
+---
+name: validate-doc
+description: Validate documentation against standards and best practices
+menu-code: VD
+---
+
+# Validate Documentation
+
+Review the specified document against documentation best practices along with anything additional the user asked you to focus on.
+
+## Process
+
+1. **Load the document** — Read the specified document fully
+2. **Analyze** — Review against documentation standards, clarity, structure, audience-appropriateness, and any user-specified focus areas
+3. **Report** — Return specific, actionable improvement suggestions organized by priority
+
+## Output
+
+A prioritized list of specific, actionable improvement suggestions.