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/plugins/__init__.py

@@ -109,7 +109,7 @@ class PluginManager:
                         'dependencies': meta.dependencies,
                         'installed': state is not None,
                         'enabled': state.enabled if state else False,
-                        'installed_at': state.installed_at if state else None
+                        'installedat': state.installed_at if state else None
                     })
                 except Exception as e:
                     logger.warning(f"Error inspecting plugin {name}: {e}")