Add auto-sleep timeout setting and handle it in loop

Incremented settings count, added autoSleepMinutes to CrossPointSettings, updated save/load functions, and integrated auto-sleep logic based on the new setting.

docs/test.sh

@@ -0,0 +1,10 @@
+   # Test 1: Check if curl exists
+   which curl
+   echo "---"
+   # Test 2: Try simple HTTP request
+   curl -v "http://192.168.4.1/" 2>&1
+   echo "---"
+   # Test 3: Try file upload with simple filename (no spaces)
+   echo "test" > /sdcard/test.txt
+   curl -v -X POST -F "file=@/sdcard/test.txt" "http://192.168.4.1/upload?path=/" 2>&1
+