Fix update functionality and improve documentation

- Fixed update detection in install scripts
- Added Git availability checks to update system
- Improved error handling for update endpoint
- Added detailed Git requirements to README
- Added troubleshooting section for update issues

🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>

modules/file-creator-module.sh

@@ -38,8 +38,42 @@ function create_directories() {
 function create_config_files() {
   echo -e "${YELLOW}Creating configuration files...${NC}"
   
-  # Create initial config.json
-  echo "Creating config.json..."
+  # Check if we're updating an existing installation
+  if [ "$IS_UPDATE" = "true" ] && [ -n "$CONFIG_FILE" ] && [ -f "$CONFIG_FILE" ]; then
+    log "INFO" "Preserving existing configuration file: $CONFIG_FILE"
+    
+    # Get version from package.json dynamically
+    VERSION=$(grep -oP '"version": "\K[^"]+' "${SCRIPT_DIR}/package.json" 2>/dev/null || echo "2.0.9")
+    
+    # Update only the version number in the config file
+    if [ -f "$CONFIG_FILE" ]; then
+      # Save a backup of the config file
+      BACKUP_FILE="${CONFIG_FILE}.bak.$(date +%Y%m%d%H%M%S)"
+      cp "$CONFIG_FILE" "$BACKUP_FILE"
+      log "INFO" "Backed up config to: $BACKUP_FILE"
+      
+      # Update version field only
+      if command -v jq &> /dev/null; then
+        # If jq is available, use it to safely update the version
+        jq ".version = \"$VERSION\"" "$CONFIG_FILE" > "${CONFIG_FILE}.new"
+        if [ $? -eq 0 ]; then
+          mv "${CONFIG_FILE}.new" "$CONFIG_FILE"
+          log "INFO" "Updated config version to: $VERSION"
+        else
+          log "WARN" "Failed to update version with jq, keeping original config unchanged"
+          rm -f "${CONFIG_FILE}.new"
+        fi
+      else
+        log "INFO" "jq not available, keeping original config file"
+      fi
+    fi
+    
+    # Return early - no need to create a new config
+    return 0
+  fi
+  
+  # For fresh installations, create initial config.json
+  echo "Creating new config.json..."
   mkdir -p "$CONFIG_DIR"
   
   # Get version from package.json dynamically