Fix app crashes: optimize Kivy window backend and SDL drivers

- Commented out forced pygame backend (causes issues with display initialization)
- Added SDL_VIDEODRIVER and SDL_AUDIODRIVER fallback chains (wayland,x11,dummy)
- Limited KIVY_INPUTPROVIDERS to wayland,x11 (avoids problematic input providers)
- Reduced FFMPEG_THREADS from 4 to 2 (conserves Raspberry Pi resources)
- Reduced LIBPLAYER_BUFFER from 2MB to 1MB (saves memory)
- Fixed asyncio event loop deprecation warning (use try/except for get_running_loop)
- Better exception handling for cursor hiding

These changes fix the app crashing after 30 seconds due to graphics provider issues.

.wait-for-display.sh

@@ -0,0 +1,54 @@
+#!/bin/bash
+# Wait for display server to be ready before starting the app
+# This prevents Kivy from failing to initialize graphics
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+MAX_WAIT=60
+ELAPSED=0
+
+echo "[$(date)] Waiting for display server to be ready..."
+
+# Wait for display socket/device to appear
+while [ $ELAPSED -lt $MAX_WAIT ]; do
+    # Check for Wayland socket (primary for Bookworm)
+    if [ -S "$XDG_RUNTIME_DIR/wayland-0" ] 2>/dev/null; then
+        echo "[$(date)] ✓ Wayland display socket found"
+        export WAYLAND_DISPLAY=wayland-0
+        break
+    fi
+    
+    # Check for X11 display
+    if [ -S "$XDG_RUNTIME_DIR/X11/display:0" ] 2>/dev/null; then
+        echo "[$(date)] ✓ X11 display socket found"
+        export DISPLAY=:0
+        break
+    fi
+    
+    # Check if display manager is running (for fallback)
+    if pgrep -f "wayland|weston|gnome-shell|xfwm4|openbox" > /dev/null 2>&1; then
+        echo "[$(date)] ✓ Display manager detected"
+        break
+    fi
+    
+    echo "[$(date)] Waiting for display... ($ELAPSED/$MAX_WAIT seconds)"
+    sleep 1
+    ((ELAPSED++))
+done
+
+if [ $ELAPSED -ge $MAX_WAIT ]; then
+    echo "[$(date)] ⚠️  Display timeout after $MAX_WAIT seconds, proceeding anyway..."
+fi
+
+# Set default display if not detected
+if [ -z "$WAYLAND_DISPLAY" ] && [ -z "$DISPLAY" ]; then
+    echo "[$(date)] Using fallback display settings"
+    export DISPLAY=:0
+    export WAYLAND_DISPLAY=wayland-0
+fi
+
+echo "[$(date)] Environment: DISPLAY=$DISPLAY WAYLAND_DISPLAY=$WAYLAND_DISPLAY"
+echo "[$(date)] XDG_RUNTIME_DIR=$XDG_RUNTIME_DIR"
+
+# Now start the app
+cd "$SCRIPT_DIR" || exit 1
+exec bash start.sh