chore: standardize config, MCP, agents, and docs

- Add .headlamp-plugin/, .env, .env.local, .eslintcache to .gitignore
- Create .prettierrc.js (standard Headlamp prettier config)
- Fix .mcp.json typo (http:/ → http://), add github server, use localhost:8086 for playwright
- Add "github" to .claude/settings.local.json enabled servers
- Create .claude/agents/ with 3 meta-orchestration agents
- Add FilesystemsPage.tsx and ObjectStoresPage.tsx to CLAUDE.md architecture tree
- Add ArtifactHub badge, Plugin Manager install method, and Troubleshooting section to README.md

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

README.md

@@ -1,5 +1,6 @@
 # Headlamp Rook Plugin
 
+[![Artifact Hub](https://img.shields.io/endpoint?url=https://artifacthub.io/badge/package/headlamp/rook/headlamp-rook-plugin)](https://artifacthub.io/packages/headlamp/rook/headlamp-rook-plugin)
 [![CI](https://github.com/cpfarhood/headlamp-rook-plugin/actions/workflows/ci.yaml/badge.svg)](https://github.com/cpfarhood/headlamp-rook-plugin/actions/workflows/ci.yaml)
 [![License: Apache-2.0](https://img.shields.io/badge/License-Apache_2.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
 
@@ -47,7 +48,11 @@ Rook-Ceph must be deployed in the `rook-ceph` namespace with standard labels. Th
 
 ## Installing
 
-### Option 1: Manual Plugin Install
+### Option 1: Headlamp Plugin Manager (Recommended)
+
+Browse the Headlamp Plugin Manager (Settings → Plugins → Catalog) and install **headlamp-rook-plugin** directly.
+
+### Option 2: Manual Plugin Install
 
 Download the latest release tarball and place it in your Headlamp plugins directory:
 
@@ -60,10 +65,6 @@ curl -L https://github.com/cpfarhood/headlamp-rook-plugin/releases/latest/downlo
 tar -xzf headlamp-rook-plugin.tar.gz -C ~/.config/Headlamp/plugins/
 ```
 
-### Option 2: Headlamp In-App Plugin Manager
-
-Browse the Headlamp Plugin Manager (Settings → Plugins) and install **headlamp-rook-plugin** directly.
-
 ## RBAC & Security Setup
 
 The plugin reads Rook-Ceph CRDs and Kubernetes resources. Your Headlamp service account needs:
@@ -107,6 +108,16 @@ subjects:
     namespace: headlamp
 ```
 
+## Troubleshooting
+
+| Symptom | Likely Cause | Quick Fix |
+| ------- | ------------ | --------- |
+| **Plugin not in sidebar** | Plugin not installed or needs browser refresh | Hard refresh (Cmd+Shift+R / Ctrl+Shift+F5) |
+| **No CephCluster data** | CRDs not installed or RBAC insufficient | Verify `kubectl get cephclusters -n rook-ceph` works |
+| **Block Pools empty** | No CephBlockPool resources | Check `kubectl get cephblockpools -n rook-ceph` |
+| **App bar badge missing** | No CephCluster present | Verify rook-ceph is deployed with a CephCluster resource |
+| **StorageClass columns not showing** | Rook provisioner not matching | Verify SC provisioner ends in `.rbd.csi.ceph.com` or `.cephfs.csi.ceph.com` |
+
 ## Development
 
 ### Prerequisites