Add print badges, pagination, route splitting, JWT auth fixes, and list page alignment

- Fix equipment badge barcode not rendering (loading race condition)
- Fix printer QR code not rendering on initial load (same race condition)
- Add model image to equipment badge via imageurl from Model table
- Fix white-on-white machine number text on badge, tighten barcode spacing
- Add PaginationBar component used across all list pages
- Split monolithic router into per-plugin route modules
- Fix 25 GET API endpoints returning 401 (jwt_required -> optional=True)
- Align list page columns across Equipment, PCs, and Network pages
- Add print views: EquipmentBadge, PrinterQRSingle, PrinterQRBatch, USBLabelBatch
- Add PC Relationships report, migration docs, and CLAUDE.md project guide
- Various plugin model, API, and frontend refinements

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

shopdb/core/api/locations.py

@@ -17,7 +17,7 @@ locations_bp = Blueprint('locations', __name__)
 
 
 @locations_bp.route('', methods=['GET'])
-@jwt_required()
+@jwt_required(optional=True)
 def list_locations():
     """List all locations."""
     page, per_page = get_pagination_params(request)
@@ -44,7 +44,7 @@ def list_locations():
 
 
 @locations_bp.route('/<int:location_id>', methods=['GET'])
-@jwt_required()
+@jwt_required(optional=True)
 def get_location(location_id: int):
     """Get a single location."""
     loc = Location.query.get(location_id)