feat: Rust sensing server with full DensePose-compatible API

Replace Python FastAPI + WebSocket servers with a single 2.1MB Rust binary
(wifi-densepose-sensing-server) that serves all UI endpoints:

- REST: /health/*, /api/v1/info, /api/v1/pose/current, /api/v1/pose/stats,
  /api/v1/pose/zones/summary, /api/v1/stream/status
- WebSocket: /api/v1/stream/pose (pose_data with 17 COCO keypoints),
  /ws/sensing (raw sensing_update stream on port 8765)
- Static: /ui/* with no-cache headers

WiFi-derived pose estimation: derive_pose_from_sensing() generates 17 COCO
keypoints from CSI/WiFi signal data with motion-driven animation.

Data sources: ESP32 CSI via UDP :5005, Windows WiFi via netsh, simulation
fallback. Auto-detection probes each in order.

UI changes:
- Point all endpoints to Rust server on :8080 (was Python :8000)
- Fix WebSocket sensing URL to include /ws/sensing path
- Remove sensingOnlyMode gating — all tabs init normally
- Remove api.service.js sensing-only short-circuit
- Fix clearPingInterval bug in websocket.service.js

Also removes obsolete k8s/ template manifests.

Co-Authored-By: claude-flow <ruv@ruv.net>

ui/app.js

@@ -65,18 +65,15 @@ class WiFiDensePoseApp {
       // Show notification to user
       this.showBackendStatus('Mock server active - testing mode', 'warning');
     } else {
-      console.log('🔌 Initializing with real backend');
+      console.log('🔌 Connecting to backend...');
 
-      // Verify backend is actually working
       try {
         const health = await healthService.checkLiveness();
-        console.log('✅ Backend is available and responding:', health);
-        this.showBackendStatus('Connected to real backend', 'success');
+        console.log('✅ Backend responding:', health);
+        this.showBackendStatus('Connected to Rust sensing server', 'success');
       } catch (error) {
-        // DensePose API backend not running — sensing-only mode
-        backendDetector.sensingOnlyMode = true;
-        console.log('ℹ️ DensePose API not running — sensing-only mode via WebSocket on :8765');
-        this.showBackendStatus('Sensing mode — live WiFi data via WebSocket', 'success');
+        console.warn('⚠️ Backend not available:', error.message);
+        this.showBackendStatus('Backend unavailable — start sensing-server', 'warning');
       }
     }
   }
@@ -99,36 +96,32 @@ class WiFiDensePoseApp {
     this.components.tabManager.onTabChange((newTab, oldTab) => {
       this.handleTabChange(newTab, oldTab);
     });
+
   }
 
   // Initialize individual tab components
   initializeTabComponents() {
-    // Skip DensePose-dependent tabs in sensing-only mode
-    const sensingOnly = backendDetector.sensingOnlyMode;
-
     // Dashboard tab
     const dashboardContainer = document.getElementById('dashboard');
     if (dashboardContainer) {
       this.components.dashboard = new DashboardTab(dashboardContainer);
-      if (!sensingOnly) {
-        this.components.dashboard.init().catch(error => {
-          console.error('Failed to initialize dashboard:', error);
-        });
-      }
+      this.components.dashboard.init().catch(error => {
+        console.error('Failed to initialize dashboard:', error);
+      });
     }
 
     // Hardware tab
     const hardwareContainer = document.getElementById('hardware');
     if (hardwareContainer) {
       this.components.hardware = new HardwareTab(hardwareContainer);
-      if (!sensingOnly) this.components.hardware.init();
+      this.components.hardware.init();
     }
 
     // Live demo tab
     const demoContainer = document.getElementById('demo');
     if (demoContainer) {
       this.components.demo = new LiveDemoTab(demoContainer);
-      if (!sensingOnly) this.components.demo.init();
+      this.components.demo.init();
     }
 
     // Sensing tab