feat(desktop): RuView Desktop v0.4.0 - Full ADR-054 Implementation (#212

)

* fix(desktop): implement save_settings and get_settings commands

Fixes #206 - Settings can now be saved and loaded in Desktop v0.3.0

- Add commands/settings.rs with get_settings and save_settings Tauri commands
- Settings persisted to app data directory as settings.json
- Supports all AppSettings fields: ports, bind address, OTA PSK, discovery, theme
- Add unit tests for serialization and defaults

Settings are stored at:
- macOS: ~/Library/Application Support/net.ruv.ruview/settings.json
- Windows: %APPDATA%/net.ruv.ruview/settings.json
- Linux: ~/.config/net.ruv.ruview/settings.json

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

* feat(desktop): RuView Desktop v0.4.0 - Full ADR-054 Implementation

This release completes all 14 Tauri commands specified in ADR-054,
making the desktop app fully production-ready for ESP32 node management.

## New Features

### Discovery Module
- Real mDNS discovery (_ruview._udp.local)
- UDP broadcast probe on port 5006
- Serial port enumeration with ESP32 chip detection

### Flash Module
- Full espflash CLI integration
- Real-time progress streaming via Tauri events
- SHA-256 firmware verification
- Support for ESP32, S2, S3, C3, C6 chips

### OTA Module
- HTTP multipart firmware upload
- HMAC-SHA256 signature with PSK authentication
- Sequential and parallel batch update strategies
- Reboot confirmation polling

### WASM Module
- 67 edge modules across 14 categories
- App-store style module library with ratings/downloads
- Full module lifecycle (upload/start/stop/unload)
- RVF format deployment paths

### Server Module
- Child process spawn with config
- Graceful SIGTERM + SIGKILL fallback
- Memory/CPU monitoring via sysinfo

### Provision Module
- NVS binary serial protocol
- Read/write/erase operations
- Mesh config generation for multi-node setup

## Security
- Input validation (IP, port, path)
- Binary validation (ESP/WASM magic bytes)
- PSK authentication for OTA

## Breaking Changes
None - backwards compatible with v0.3.0

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

---------

Co-authored-by: Reuven <cohen@ruv-mac-mini.local>

fix(desktop): v0.4.1 - Fix Dashboard Quick Actions and Scan Network

- Add navigation to Quick Actions (Flash, OTA, WASM buttons now work)
- Add error feedback for Scan Network failures
- Create version.ts as single source of truth for version
- Switch reqwest from rustls-tls to native-tls for Windows compatibility
- Version bump to 0.4.1

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

fix(ci): use correct rust-toolchain action name

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

Update README.md

fix: use montserrat_14 for display_ui big label (montserrat_20 not in…

… Kconfig)

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

feat: ADR-039 edge intelligence — on-device CSI processing pipeline

Implements a dual-core edge processing system for ESP32-S3:
- Lock-free SPSC ring buffer (Core 0 produces, Core 1 consumes)
- Tier 1: phase unwrap, Welford stats, top-K subcarrier selection, delta compression
- Tier 2: presence/motion detection, vital signs (breathing/heart rate via biquad IIR), fall detection
- Vitals UDP packet (magic 0xC5110002, 32 bytes, sent at 1 Hz)
- NVS/Kconfig configurable (edge_tier, thresholds, intervals)
- Backward compatible: tier=0 (default) is a no-op
- GitHub Actions firmware CI: build, binary size gate, credential scan, flash image verification
- Binary: 777 KB (24% free in 1 MB partition)

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

feat: add provision.py to repo, fix user guide paths

- Move provision.py from release-only asset into firmware/esp32-csi-node/
- Fix user guide references from scripts/provision.py to correct path
- Update release link to v0.2.0-esp32

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

refactor(rust-port): remove unused once-cell crate (#58)

refactor(rust-port): remove unused `once-cell` crate