feat: Enhance message handling for drawings

- Added properties to the Message model to track drawing status and associated drawing ID.
- Updated AppProvider to mark messages as drawings and link them to their respective drawing IDs.
- Enhanced DrawingProvider to manage received drawings and their visibility.
- Implemented navigation to drawings in MapProvider, including dynamic zoom levels based on drawing size.
- Updated MessagesProvider to parse drawing messages and manage linked drawings.
- Enhanced MessagesTab to support drawing message interactions, including navigation and coordinate copying.
- Created DrawingMinimapPreview widget for visual representation of drawings in message bubbles.
- Improved DrawingToolbar to handle sharing of drawings, ensuring only unshared drawings are sent.
- Added utility functions in DrawingMessageParser for extracting drawing metadata.

lib/utils/drawing_message_parser.dart

@@ -49,4 +49,113 @@ class DrawingMessageParser {
     final jsonStr = jsonEncode(json);
     return '$prefix$jsonStr';
   }
+
+  /// Get drawing type display name from drawing message text
+  /// Returns "Line" or "Rectangle", or null if parsing fails
+  static String? getDrawingTypeDisplay(String text) {
+    if (!isDrawingMessage(text)) return null;
+
+    try {
+      final jsonStr = text.substring(prefix.length);
+      final json = jsonDecode(jsonStr) as Map<String, dynamic>;
+      final typeNum = json['t'] as int?;
+
+      if (typeNum == null) return null;
+
+      switch (typeNum) {
+        case 0:
+          return 'Line';
+        case 1:
+          return 'Rectangle';
+        default:
+          return null;
+      }
+    } catch (e) {
+      return null;
+    }
+  }
+
+  /// Get color name from drawing message text
+  /// Returns color name like "Red", "Blue", etc., or null if parsing fails
+  static String? getColorName(String text) {
+    if (!isDrawingMessage(text)) return null;
+
+    try {
+      final jsonStr = text.substring(prefix.length);
+      final json = jsonDecode(jsonStr) as Map<String, dynamic>;
+      final colorIndex = json['c'] as int?;
+
+      if (colorIndex == null) return null;
+
+      // Color mapping from DrawingColor enum
+      const colorNames = [
+        'Red',    // 0
+        'Blue',   // 1
+        'Green',  // 2
+        'Yellow', // 3
+        'Orange', // 4
+        'Purple', // 5
+        'Pink',   // 6
+        'Cyan',   // 7
+      ];
+
+      if (colorIndex >= 0 && colorIndex < colorNames.length) {
+        return colorNames[colorIndex];
+      }
+
+      return null;
+    } catch (e) {
+      return null;
+    }
+  }
+
+  /// Get drawing metadata for display in message bubbles
+  /// Returns map with type, color, and pointCount, or null if parsing fails
+  static Map<String, dynamic>? getDrawingMetadata(String text) {
+    if (!isDrawingMessage(text)) return null;
+
+    try {
+      final jsonStr = text.substring(prefix.length);
+      final json = jsonDecode(jsonStr) as Map<String, dynamic>;
+
+      final typeNum = json['t'] as int?;
+      final colorIndex = json['c'] as int?;
+
+      if (typeNum == null || colorIndex == null) return null;
+
+      // Get type display name
+      String type;
+      int? pointCount;
+
+      switch (typeNum) {
+        case 0: // Line
+          type = 'Line';
+          final points = json['p'] as List?;
+          pointCount = points != null ? points.length ~/ 2 : null;
+          break;
+        case 1: // Rectangle
+          type = 'Rectangle';
+          pointCount = 4; // Rectangles always have 4 corners
+          break;
+        default:
+          return null;
+      }
+
+      // Get color name
+      const colorNames = [
+        'Red', 'Blue', 'Green', 'Yellow', 'Orange', 'Purple', 'Pink', 'Cyan',
+      ];
+      final color = colorIndex >= 0 && colorIndex < colorNames.length
+          ? colorNames[colorIndex]
+          : 'Unknown';
+
+      return {
+        'type': type,
+        'color': color,
+        'pointCount': pointCount,
+      };
+    } catch (e) {
+      return null;
+    }
+  }
 }