feat: Add HTTPS/Traefik support with centralized endpoints

- Create traefik/agent-ui.yml with full routing config for domain z590.nucleoriofrio.com
- Add frontend/src/config/endpoints.ts for automatic HTTP/HTTPS detection
- Update all hardcoded localhost URLs to use relative paths
- WebSocket connections auto-detect wss:// vs ws:// based on page protocol
- Configure path-based WebSocket routing (/ws/terminal, /ws/mcp, /ws/status, /ws/whisper)
- Add commented IP whitelist middleware for future security

frontend/src/components/FloatingTerminal.vue

@@ -6,6 +6,7 @@ import { WebLinksAddon } from '@xterm/addon-web-links'
 import '@xterm/xterm/css/xterm.css'
 import { connectWithToken, stopTokenPolling } from '../services/webmcp'
 import { useCanvasStore } from '../stores/canvas'
+import { endpoints } from '../config/endpoints'
 
 const props = defineProps<{
   modelValue: boolean
@@ -47,7 +48,7 @@ let tokenBuffer = ''
 let tokenTimeout: number | null = null
 const waitingForToken = ref(false)
 
-const WS_URL = `ws://${window.location.hostname}:4103`
+const WS_URL = endpoints.terminal
 
 // Mouse position tracking for Ctrl+E
 const mousePos = ref({ x: 0, y: 0 })