Add design specification for LoRaWAN Web Portal

Based on Pflichtenheft v2.2, documents the full system design including daemon, API, frontend, and infrastructure with agreed deviations (Axum 0.8, SQLx 0.8, Vite 6, Tailwind 4). Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-03-19 22:27:49 +01:00
commit e706b22f31
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+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch