Fix dualpath propagation, getShopfloorPCs filtering, USB management, and printer features

- Fix dualpath PC propagation direction (Equipment->PC) in api.asp and db_helpers.asp
- Fix early exit in CreatePCMachineRelationship preventing propagation
- Fix getShopfloorPCs to filter machinetypeid IN (33,34,35) instead of >= 33
- Fix getShopfloorPCs to show equipment numbers via GROUP_CONCAT subquery
- Add detailed PropagateDP logging for dualpath debugging
- Default "Show on Shopfloor Dashboard" checkbox to checked in addnotification.asp
- Add USB label batch printing, single USB labels, and USB history pages
- Add printer supplies tracking and toner report enhancements
- Add uptime map visualization page
- Add dashboard/lobby display SQL migration
- Update CLAUDE.md with IIS 401 workaround documentation
- Update TODO.md

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

TODO.md

@@ -1,15 +1,12 @@
 # ShopDB - Future TODO List
 
 **Created:** 2025-11-25
-**Last Updated:** 2025-11-25
+**Last Updated:** 2026-01-16
 
 ---
 
 ## High Priority
 
-### Outstanding Bugs
-- [ ] Fix displaysubnet.asp - Runtime error (subscript out of range)
-
 ### Uncommitted Changes
 - [ ] Review and commit pending changes:
   - api.asp
@@ -68,6 +65,9 @@
 
 ## Completed (Reference)
 
+### December 2025
+- [x] Fix displaysubnet.asp runtime error - Phase 2 schema update (Dec 29)
+
 ### November 2025
 - [x] Phase 1: Schema changes (Nov 6)
 - [x] Phase 2: PC migration (Nov 10)