✨ feat(stt): add speech-to-text service for Mac Mini

Add mana-stt service with Whisper and Voxtral support for local
transcription. Includes setup script and launchd integration for
automatic startup on Mac Mini server.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

scripts/mac-mini/setup-stt.sh

@@ -0,0 +1,153 @@
+#!/bin/bash
+# Setup STT Service on Mac Mini
+# Creates launchd service for auto-start
+
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+REPO_DIR="$(cd "$SCRIPT_DIR/../.." && pwd)"
+STT_DIR="$REPO_DIR/services/mana-stt"
+PLIST_NAME="com.manacore.stt"
+PLIST_PATH="$HOME/Library/LaunchAgents/$PLIST_NAME.plist"
+
+echo "=============================================="
+echo "  ManaCore STT Service Setup (Mac Mini)"
+echo "=============================================="
+echo ""
+
+# Check if STT service directory exists
+if [ ! -d "$STT_DIR" ]; then
+    echo "Error: STT service directory not found at $STT_DIR"
+    exit 1
+fi
+
+# Run the main setup script first
+echo "1. Running STT service setup..."
+cd "$STT_DIR"
+if [ ! -d ".venv" ]; then
+    echo "   Installing dependencies..."
+    ./setup.sh
+else
+    echo "   Virtual environment already exists"
+    echo "   Skipping dependency installation"
+fi
+
+# Create launchd plist
+echo ""
+echo "2. Creating launchd service..."
+
+cat > "$PLIST_PATH" << EOF
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+    <key>Label</key>
+    <string>$PLIST_NAME</string>
+
+    <key>ProgramArguments</key>
+    <array>
+        <string>$STT_DIR/.venv/bin/uvicorn</string>
+        <string>app.main:app</string>
+        <string>--host</string>
+        <string>0.0.0.0</string>
+        <string>--port</string>
+        <string>3020</string>
+    </array>
+
+    <key>WorkingDirectory</key>
+    <string>$STT_DIR</string>
+
+    <key>EnvironmentVariables</key>
+    <dict>
+        <key>PATH</key>
+        <string>$STT_DIR/.venv/bin:/usr/local/bin:/usr/bin:/bin</string>
+        <key>PORT</key>
+        <string>3020</string>
+        <key>WHISPER_MODEL</key>
+        <string>large-v3-turbo</string>
+        <key>PRELOAD_MODELS</key>
+        <string>false</string>
+        <key>CORS_ORIGINS</key>
+        <string>https://mana.how,https://chat.mana.how,https://todo.mana.how</string>
+    </dict>
+
+    <key>RunAtLoad</key>
+    <true/>
+
+    <key>KeepAlive</key>
+    <dict>
+        <key>SuccessfulExit</key>
+        <false/>
+        <key>Crashed</key>
+        <true/>
+    </dict>
+
+    <key>ThrottleInterval</key>
+    <integer>10</integer>
+
+    <key>StandardOutPath</key>
+    <string>/tmp/manacore-stt.log</string>
+
+    <key>StandardErrorPath</key>
+    <string>/tmp/manacore-stt.error.log</string>
+</dict>
+</plist>
+EOF
+
+echo "   Created: $PLIST_PATH"
+
+# Unload if already loaded
+echo ""
+echo "3. Loading launchd service..."
+launchctl unload "$PLIST_PATH" 2>/dev/null || true
+launchctl load "$PLIST_PATH"
+
+# Wait for service to start
+sleep 2
+
+# Check if service is running
+echo ""
+echo "4. Checking service status..."
+if launchctl list | grep -q "$PLIST_NAME"; then
+    echo "   Service is running"
+
+    # Check health endpoint
+    sleep 3
+    if curl -s http://localhost:3020/health > /dev/null 2>&1; then
+        echo "   Health check passed"
+        HEALTH=$(curl -s http://localhost:3020/health)
+        echo "   $HEALTH"
+    else
+        echo "   Warning: Health check failed (service may still be starting)"
+        echo "   Check logs: tail -f /tmp/manacore-stt.log"
+    fi
+else
+    echo "   Warning: Service may not be running"
+    echo "   Check logs: tail -f /tmp/manacore-stt.error.log"
+fi
+
+echo ""
+echo "=============================================="
+echo "  STT Service Setup Complete!"
+echo "=============================================="
+echo ""
+echo "Service URL: http://localhost:3020"
+echo ""
+echo "Useful commands:"
+echo "  # View logs"
+echo "  tail -f /tmp/manacore-stt.log"
+echo ""
+echo "  # Restart service"
+echo "  launchctl kickstart -k gui/\$(id -u)/$PLIST_NAME"
+echo ""
+echo "  # Stop service"
+echo "  launchctl unload $PLIST_PATH"
+echo ""
+echo "  # Start service"
+echo "  launchctl load $PLIST_PATH"
+echo ""
+echo "  # Test transcription"
+echo "  curl -X POST http://localhost:3020/transcribe \\"
+echo "    -F 'file=@audio.mp3' \\"
+echo "    -F 'language=de'"
+echo ""