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-alsa.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+# Clean poll-based volume bridge (pure ALSA, no PipeWire).
+# Windows "Source/Sink" speaker volume -> gadget control numid=7 (PCM Capture
+# Volume, 0-100). Applied to ES8323 analog output (Output 1/2, 0-33) only when it
+# actually changes (poll every 200ms) so we don't hammer the mixer on the gadget's
+# ~10Hz async rate-feedback events.
+set -u
+CG=UAC2Gadget
+CE=0
+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
+    o=$(( v * 25 / 100 ))
+    amixer -c "$CE" sset 'Output 1' "$o" >/dev/null 2>&1
+    amixer -c "$CE" sset 'Output 2' "$o" >/dev/null 2>&1
+    case "$m" in
+      off|0) amixer -c "$CE" sset 'Headphone' off >/dev/null 2>&1 ;;
+      *)     amixer -c "$CE" sset 'Headphone' on  >/dev/null 2>&1 ;;
+    esac
+    last="$v"; lastm="$m"
+  fi
+  sleep 0.2
+done