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-prfaq/bmad-manifest.json

@@ -0,0 +1,16 @@
+{
+  "module-code": "bmm",
+  "capabilities": [
+    {
+      "name": "working-backwards",
+      "menu-code": "WB",
+      "description": "Produces battle-tested PRFAQ document and optional LLM distillate for PRD input.",
+      "supports-headless": true,
+      "phase-name": "1-analysis",
+      "preceded-by": ["brainstorming", "perform-research"],
+      "followed-by": ["create-prd"],
+      "is-required": false,
+      "output-location": "{planning_artifacts}"
+    }
+  ]
+}