agent: foundation — import legacy codebase from Obsidian vault

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

crates/audio/Cargo.toml

@@ -0,0 +1,27 @@
+[package]
+name = "kon-audio"
+version = "0.1.0"
+edition = "2021"
+description = "Audio capture (cpal), VAD, resampling (rubato), file decoding (symphonia), WAV I/O (hound) for Kon"
+
+[dependencies]
+kon-core = { path = "../core" }
+
+# Microphone capture
+cpal = "0.17"
+
+# Voice activity detection — deferred until ort version conflict between
+# VAD crates (ort rc.10) and transcribe-rs (ort rc.12) is resolved upstream.
+# silero-vad-rust = { version = "6", default-features = false }
+
+# High-quality resampling (sinc interpolation)
+rubato = "0.15"
+
+# WAV file I/O
+hound = "3.5"
+
+# Audio file decoding (mp3, aac, flac, wav, ogg, etc.)
+symphonia = { version = "0.5", features = ["mp3", "aac", "flac", "pcm", "vorbis", "wav", "ogg", "isomp4"] }
+
+# Async runtime for threading
+tokio = { version = "1", features = ["rt", "sync"] }