Migrate frontend to plugin-based asset architecture

- Add equipmentApi and computersApi to replace legacy machinesApi
- Add controller vendor/model fields to Equipment model and forms
- Fix map marker navigation to use plugin-specific IDs (equipmentid,
  computerid, printerid, networkdeviceid) instead of assetid
- Fix search to use unified Asset table with correct plugin IDs
- Remove legacy printer search that used non-existent field names
- Enable optional JWT auth for detail endpoints (public read access)
- Clean up USB plugin models (remove unused checkout model)

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

frontend/vite.config.js

@@ -13,11 +13,11 @@ export default defineConfig({
     port: 5173,
     proxy: {
       '/api': {
-        target: 'http://localhost:5000',
+        target: 'http://localhost:5001',
         changeOrigin: true
       },
       '/static': {
-        target: 'http://localhost:5000',
+        target: 'http://localhost:5001',
         changeOrigin: true
       }
     }