fix: Address multiple issues in debug script, array rendering, and custom feeds

1. debug_install.sh: Make log path dynamic instead of hardcoded
   - Compute project root from script location
   - Use dynamic LOG_DIR instead of hardcoded /home/ledpi/LEDMatrix/logs/
   - Works from any clone location and user

2. plugins_manager.js renderArrayObjectItem: Fix XSS and metadata issues
   - HTML-escape logoValue.path in img src attribute (XSS prevention)
   - Add data-file-data attribute to preserve file metadata for serialization
   - Add data-prop-key attribute for proper property tracking
   - Use schema-driven remove button label (x-removeLabel) with fallback to 'Remove item'

3. base.html addCustomFeedRow: Fix duplicate enabled field and hardcoded pluginId
   - Remove duplicate hidden input for enabled field (checkbox alone is sufficient)
   - Add pluginId parameter to function signature
   - Pass pluginId to handleCustomFeedLogoUpload instead of hardcoded 'ledmatrix-news'
   - Update caller in plugin_config.html to pass plugin_id

These fixes improve security (XSS prevention), functionality (metadata
preservation), and maintainability (no hardcoded values).

scripts/install/debug_install.sh

@@ -68,13 +68,17 @@ fi
 echo ""
 
 echo "8. Latest installation log:"
-LOG_FILE=$(ls -t /home/ledpi/LEDMatrix/logs/first_time_install_*.log 2>/dev/null | head -1)
+# Determine project root directory (parent of scripts/install/)
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PROJECT_ROOT_DIR="$(cd "$SCRIPT_DIR/../.." && pwd)"
+LOG_DIR="$PROJECT_ROOT_DIR/logs"
+LOG_FILE=$(ls -t "$LOG_DIR"/first_time_install_*.log 2>/dev/null | head -1)
 if [ -n "$LOG_FILE" ]; then
     echo "   Found: $LOG_FILE"
     echo "   Last 30 lines:"
     tail -30 "$LOG_FILE" | sed 's/^/   /'
 else
-    echo "   No log files found in /home/ledpi/LEDMatrix/logs/"
+    echo "   No log files found in $LOG_DIR/"
 fi
 echo ""