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/plans/TOOL-ENGAGEMENT-PROTOCOL.md

@@ -208,16 +208,16 @@ Then proceed without the required tools (but note that you're skipping for this
 ## Success Metrics
 
 ### Good Engagement
-- ✅ Coordinator used before every file edit
-- ✅ Gortex used for architectural queries
-- ✅ Skills invoked when task matches their domain
-- ✅ Workflows proposed for complex tasks
+- [X] Coordinator used before every file edit
+- [X] Gortex used for architectural queries
+- [X] Skills invoked when task matches their domain
+- [X] Workflows proposed for complex tasks
 
 ### Poor Engagement
-- ❌ Editing files without announce_work
-- ❌ Using grep when Gortex would be more accurate
-- ❌ Creating charts without dataviz skill guidance
-- ❌ Manual sequential analysis when workflow would parallelize
+- [ ] Editing files without announce_work
+- [ ] Using grep when Gortex would be more accurate
+- [ ] Creating charts without dataviz skill guidance
+- [ ] Manual sequential analysis when workflow would parallelize
 
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