feat: ADR-024 Contrastive CSI Embedding Model — all 7 phases (#52)

Full implementation of Project AETHER — Contrastive CSI Embedding Model.

## Phases Delivered
1. ProjectionHead (64→128→128) + L2 normalization
2. CsiAugmenter (5 physically-motivated augmentations)
3. InfoNCE contrastive loss + SimCLR pretraining
4. FingerprintIndex (4 index types: env, activity, temporal, person)
5. RVF SEG_EMBED (0x0C) + CLI integration
6. Cross-modal alignment (PoseEncoder + InfoNCE)
7. Deep RuVector: MicroLoRA, EWC++, drift detection, hard-negative mining, SEG_LORA

## Stats
- 276 tests passing (191 lib + 51 bin + 16 rvf + 18 vitals)
- 3,342 additions across 8 files
- Zero unsafe/unwrap/panic/todo stubs
- ~55KB INT8 model for ESP32 edge deployment

Also fixes deprecated GitHub Actions (v3→v4) and adds feat/* branch CI triggers.

Closes #50

rust-port/wifi-densepose-rs/crates/wifi-densepose-wasm/README.md

@@ -0,0 +1,128 @@
+# wifi-densepose-wasm
+
+[![Crates.io](https://img.shields.io/crates/v/wifi-densepose-wasm.svg)](https://crates.io/crates/wifi-densepose-wasm)
+[![Documentation](https://docs.rs/wifi-densepose-wasm/badge.svg)](https://docs.rs/wifi-densepose-wasm)
+[![License](https://img.shields.io/crates/l/wifi-densepose-wasm.svg)](LICENSE)
+
+WebAssembly bindings for running WiFi-DensePose directly in the browser.
+
+## Overview
+
+`wifi-densepose-wasm` compiles the WiFi-DensePose stack to `wasm32-unknown-unknown` and exposes a
+JavaScript API via [wasm-bindgen](https://rustwasm.github.io/wasm-bindgen/). The primary export is
+`MatDashboard` -- a fully client-side disaster response dashboard that manages scan zones, tracks
+survivors, generates triage alerts, and renders to an HTML Canvas element.
+
+The crate also provides utility functions (`init`, `getVersion`, `isMatEnabled`, `getTimestamp`) and
+a logging bridge that routes Rust `log` output to the browser console.
+
+## Features
+
+- **MatDashboard** -- Create disaster events, add rectangular and circular scan zones, subscribe to
+  survivor-detected and alert-generated callbacks, and render zone/survivor overlays on Canvas.
+- **Real-time callbacks** -- Register JavaScript closures for `onSurvivorDetected` and
+  `onAlertGenerated` events, called from the Rust event loop.
+- **Canvas rendering** -- Draw zone boundaries, survivor markers (colour-coded by triage status),
+  and alert indicators directly to a `CanvasRenderingContext2d`.
+- **WebSocket integration** -- Connect to a sensing server for live CSI data via `web-sys` WebSocket
+  bindings.
+- **Panic hook** -- `console_error_panic_hook` provides human-readable stack traces in the browser
+  console on panic.
+- **Optimised WASM** -- Release profile uses `-O4` wasm-opt with mutable globals for minimal binary
+  size.
+
+### Feature flags
+
+| Flag                       | Default | Description |
+|----------------------------|---------|-------------|
+| `console_error_panic_hook` | yes     | Better panic messages in the browser console |
+| `mat`                      | no      | Enable MAT disaster detection dashboard |
+
+## Quick Start
+
+### Build
+
+```bash
+# Build with wasm-pack (recommended)
+wasm-pack build --target web --features mat
+
+# Or with cargo directly
+cargo build --target wasm32-unknown-unknown --features mat
+```
+
+### JavaScript Usage
+
+```javascript
+import init, {
+  MatDashboard,
+  initLogging,
+  getVersion,
+  isMatEnabled,
+} from './wifi_densepose_wasm.js';
+
+async function main() {
+  await init();
+  initLogging('info');
+
+  console.log('Version:', getVersion());
+  console.log('MAT enabled:', isMatEnabled());
+
+  const dashboard = new MatDashboard();
+
+  // Create a disaster event
+  const eventId = dashboard.createEvent(
+    'earthquake', 37.7749, -122.4194, 'Bay Area Earthquake'
+  );
+
+  // Add scan zones
+  dashboard.addRectangleZone('Building A', 50, 50, 200, 150);
+  dashboard.addCircleZone('Search Area B', 400, 200, 80);
+
+  // Subscribe to real-time events
+  dashboard.onSurvivorDetected((survivor) => {
+    console.log('Survivor:', survivor);
+  });
+
+  dashboard.onAlertGenerated((alert) => {
+    console.log('Alert:', alert);
+  });
+
+  // Render to canvas
+  const canvas = document.getElementById('map');
+  const ctx = canvas.getContext('2d');
+
+  function render() {
+    ctx.clearRect(0, 0, canvas.width, canvas.height);
+    dashboard.renderZones(ctx);
+    dashboard.renderSurvivors(ctx);
+    requestAnimationFrame(render);
+  }
+  render();
+}
+
+main();
+```
+
+## Exported API
+
+| Export | Kind | Description |
+|--------|------|-------------|
+| `init()` | Function | Initialise the WASM module (called automatically via `wasm_bindgen(start)`) |
+| `initLogging(level)` | Function | Set log level: `trace`, `debug`, `info`, `warn`, `error` |
+| `getVersion()` | Function | Return the crate version string |
+| `isMatEnabled()` | Function | Check whether the MAT feature is compiled in |
+| `getTimestamp()` | Function | High-resolution timestamp via `Performance.now()` |
+| `MatDashboard` | Class | Disaster response dashboard (zones, survivors, alerts, rendering) |
+
+## Related Crates
+
+| Crate | Role |
+|-------|------|
+| [`wifi-densepose-mat`](../wifi-densepose-mat) | MAT engine (linked when `mat` feature enabled) |
+| [`wifi-densepose-core`](../wifi-densepose-core) | Shared types and traits |
+| [`wifi-densepose-cli`](../wifi-densepose-cli) | Terminal-based MAT interface |
+| [`wifi-densepose-sensing-server`](../wifi-densepose-sensing-server) | Backend sensing server for WebSocket data |
+
+## License
+
+MIT OR Apache-2.0