feat: komplette Codebase vom Board ins Repo gespiegelt

app/ = /opt/callrec (Node-Backend, Vite-Frontend, Python-Inferenz,
Audio-Skripte, rkllm_server.cpp), system/ = systemd-Units,
WirePlumber/PipeWire-Drop-ins, sudoers. Modelle, Binaries, Aufnahmen
und node_modules bleiben draussen (.gitignore).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

app/aime-volbridge-headset.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+# Windows "Source/Sink" speaker volume -> USB gadget Feature Unit (numid=7, PCM
+# Capture Volume 0-100) + mute (numid=6). Mirror it onto the USB headset sink so
+# the Windows volume slider actually controls what the user hears in the headset.
+# Poll-based (200ms), only acts on change to avoid hammering the mixer on the
+# gadget's ~10Hz async rate-feedback events.
+set -u
+export XDG_RUNTIME_DIR=/run/user/1000
+CG=UAC2Gadget
+HSSINK=alsa_output.usb-Logi_USB_Headset_Logi_USB_Headset-00.analog-stereo
+last=-1; lastm=-1
+while true; do
+  v=$(amixer -c "$CG" cget numid=7 2>/dev/null | awk -F= '/: values=/{print $2; exit}')
+  m=$(amixer -c "$CG" cget numid=6 2>/dev/null | awk -F= '/: values=/{print $2; exit}')
+  if [ -n "$v" ] && { [ "$v" != "$last" ] || [ "$m" != "$lastm" ]; }; then
+    pactl set-sink-volume "$HSSINK" "${v}%" >/dev/null 2>&1
+    case "$m" in
+      off|0) pactl set-sink-mute "$HSSINK" 1 >/dev/null 2>&1 ;;
+      *)     pactl set-sink-mute "$HSSINK" 0 >/dev/null 2>&1 ;;
+    esac
+    last="$v"; lastm="$m"
+  fi
+  sleep 0.2
+done