Add rotary phone web interface with multiple greeting support

Features:
- Web interface for managing rotary phone system
- Support for multiple greeting messages with selector
- Direct audio playback in browser for recordings and greetings
- Upload multiple WAV files at once
- Set active greeting that plays when phone is picked up
- HiFiBerry DAC+ADC Pro audio configuration
- GPIO-based handset detection and audio recording
- Real-time status monitoring with auto-refresh

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

configure_hifiberry.sh

@@ -0,0 +1,100 @@
+#!/bin/bash
+# Auto-detect HiFiBerry and configure ALSA
+
+echo "=========================================="
+echo "HiFiBerry Auto-Configuration"
+echo "=========================================="
+echo ""
+
+# Find HiFiBerry card number
+echo "Detecting HiFiBerry..."
+CARD_INFO=$(aplay -l | grep -i hifiberry)
+
+if [ -z "$CARD_INFO" ]; then
+    echo "❌ HiFiBerry not found!"
+    echo ""
+    echo "Make sure:"
+    echo "1. HiFiBerry is properly seated on GPIO pins"
+    echo "2. /boot/firmware/config.txt has: dtoverlay=hifiberry-dacplusadcpro"
+    echo "3. You've rebooted after changing config.txt"
+    exit 1
+fi
+
+echo "✓ HiFiBerry found:"
+echo "$CARD_INFO"
+echo ""
+
+# Extract card number
+CARD_NUM=$(echo "$CARD_INFO" | grep -oP 'card \K[0-9]+' | head -1)
+
+echo "Card number: $CARD_NUM"
+echo ""
+
+# Create ALSA config
+echo "Creating ~/.asoundrc..."
+cat > ~/.asoundrc << EOF
+# ALSA Configuration for HiFiBerry DAC+ADC Pro
+# Auto-generated configuration
+
+pcm.!default {
+    type asym
+    playback.pcm "plughw:${CARD_NUM},0"
+    capture.pcm "plughw:${CARD_NUM},0"
+}
+
+ctl.!default {
+    type hw
+    card ${CARD_NUM}
+}
+EOF
+
+echo "✓ Created ~/.asoundrc with card ${CARD_NUM}"
+echo ""
+
+# Show the config
+echo "Configuration:"
+cat ~/.asoundrc
+echo ""
+
+# Set volume
+echo "Setting volume to 100%..."
+amixer -c ${CARD_NUM} sset Master 100% 2>/dev/null || echo "Master control not available"
+amixer -c ${CARD_NUM} sset PCM 100% 2>/dev/null || echo "PCM control not available"
+amixer -c ${CARD_NUM} sset Digital 100% 2>/dev/null || echo "Digital control not available"
+amixer -c ${CARD_NUM} sset Analogue 100% 2>/dev/null || echo "Analogue control not available"
+echo ""
+
+# Test speaker
+echo "Testing speaker..."
+echo "🔊 Playing test tone - you should hear a beep!"
+aplay -D plughw:${CARD_NUM},0 /usr/share/sounds/alsa/Front_Center.wav 2>/dev/null || \
+speaker-test -D plughw:${CARD_NUM},0 -c 1 -t sine -f 440 -l 2 2>/dev/null
+
+echo ""
+echo "=========================================="
+echo "Configuration Complete!"
+echo "=========================================="
+echo ""
+echo "Your HiFiBerry is configured as card ${CARD_NUM}"
+echo ""
+echo "Test commands:"
+echo "  aplay -D plughw:${CARD_NUM},0 /usr/share/sounds/alsa/Front_Center.wav"
+echo "  speaker-test -D plughw:${CARD_NUM},0 -c 1 -t wav"
+echo ""
+echo "For Python script, use device index:"
+
+# Find PyAudio device index
+python3 << PYEOF
+import pyaudio
+audio = pyaudio.PyAudio()
+print("")
+for i in range(audio.get_device_count()):
+    info = audio.get_device_info_by_index(i)
+    if 'hifiberry' in info['name'].lower():
+        print(f"  PyAudio device index: {i}")
+        print(f"  Device name: {info['name']}")
+        break
+audio.terminate()
+PYEOF
+
+echo ""