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/config/api.config.js

@@ -1,7 +1,7 @@
 // API Configuration for WiFi-DensePose UI
 
 export const API_CONFIG = {
-  BASE_URL: 'http://localhost:8000',  // FastAPI backend port
+  BASE_URL: 'http://localhost:8080',  // Rust sensing server port
   API_VERSION: '/api/v1',
   WS_PREFIX: 'ws://',
   WSS_PREFIX: 'wss://',
@@ -111,8 +111,8 @@ export function buildWsUrl(endpoint, params = {}) {
     ? API_CONFIG.WSS_PREFIX 
     : API_CONFIG.WS_PREFIX;
   
-  // Use localhost:8000 for WebSocket connections to match FastAPI backend
-  const host = 'localhost:8000';
+  // Match Rust sensing server port
+  const host = 'localhost:8080';
   let url = `${protocol}${host}${endpoint}`;
   
   // Add query parameters