Auto-commit after successful build: improve build setup

Changed files:\nSetupBuildEnvironment.sh

SetupBuildEnvironment.sh

@@ -75,10 +75,27 @@ auto_commit_if_needed() {
     return
   fi
 
+  local changed_files
+  changed_files="$(git -C "$PROJECT_DIR" diff --cached --name-only)"
+
+  local -a summary_parts=()
+  if printf '%s\n' "$changed_files" | grep -q '^app/src/main/java/'; then
+    summary_parts+=("update app gameplay/UI")
+  fi
+  if printf '%s\n' "$changed_files" | grep -Eq '^(SetupBuildEnvironment\.sh|gradle\.properties|gradle/|gradlew|gradlew\.bat|build\.gradle\.kts|settings\.gradle\.kts|app/build\.gradle\.kts)'; then
+    summary_parts+=("improve build setup")
+  fi
+  if printf '%s\n' "$changed_files" | grep -Eq '^(README\.md|\.gitignore)$'; then
+    summary_parts+=("update docs/config")
+  fi
+  if [ ${#summary_parts[@]} -eq 0 ]; then
+    summary_parts+=("project updates")
+  fi
+
   local commit_message
-  commit_message="Auto-commit after successful build ($(date '+%Y-%m-%d %H:%M:%S'))"
+  commit_message="Auto-commit after successful build: $(printf '%s, ' "${summary_parts[@]}" | sed 's/, $//')"
   log "Creating git commit for the latest successful build"
-  git -C "$PROJECT_DIR" commit -m "$commit_message"
+  git -C "$PROJECT_DIR" commit -m "$commit_message" -m "Changed files:\n$changed_files"
 }
 
 download_if_missing() {