Fix CI failures: remove unicode and fix lean build

- Replace all unicode (emojis, checkmarks, arrows, em-dashes) with ASCII in .claude/ docs
- Comment out OperatingSystemsList route in core.js - breaks lean builds without computers plugin
- Comment out Operating Systems tab in ModelCatalogHub
- TODO: Plugins should dynamically register their settings routes

Fixes #2 CI check failures on wj branch

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

.claude/setup/INDEX-MCP-DOCS.md

@@ -278,16 +278,16 @@ See `VM-SNAPSHOT-GUIDE.md` for complete snapshot management guide.
 
 ```
 flask-shopdb/
-└── .claude/
-    ├── INDEX-MCP-DOCS.md              ← This file (documentation index)
-    ├── README-MCP-SETUP.md            ← Quick reference
-    ├── MCP-INTEGRATION-GUIDE.md       ← Complete guide
-    ├── VM-SNAPSHOT-GUIDE.md           ← Snapshot management
-    ├── setup-vm-ssh.md                ← SSH setup guide
-    ├── mcp-servers.json               ← Configuration file
-    ├── test-mcp-servers.ps1           ← Test suite
-    ├── quick-start-mcp.ps1            ← Setup automation
-    └── enable-vm-ssh.ps1              ← VM SSH enablement
++-- .claude/
+    +-- INDEX-MCP-DOCS.md              <- This file (documentation index)
+    +-- README-MCP-SETUP.md            <- Quick reference
+    +-- MCP-INTEGRATION-GUIDE.md       <- Complete guide
+    +-- VM-SNAPSHOT-GUIDE.md           <- Snapshot management
+    +-- setup-vm-ssh.md                <- SSH setup guide
+    +-- mcp-servers.json               <- Configuration file
+    +-- test-mcp-servers.ps1           <- Test suite
+    +-- quick-start-mcp.ps1            <- Setup automation
+    +-- enable-vm-ssh.ps1              <- VM SSH enablement
 ```
 
 ---