Live Editor: add DASP/Sox device connection with full CRUD and COV
Port the DASP transport and Sox protocol stack from sedonaOntrol Java to Python, enabling live device editing alongside the existing offline SAX editor. Lazy-loads components on navigation, caches them, and subscribes to COV events for the active wiresheet. New files: dasp.py, sox.py, device_session.py, connect_dialog.py, live_hooks.py. Modified: app_state.py (live-mode state), main.py (Device menu, COV polling, lazy tree expand), properties.py (Sox write-through), sax_file.py (structural mutations route through live_hooks), schema.py (find_manifest helper). Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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