Fix critical async/await bug in Supabase database methods

- Fix get_tree() method to be async (was causing 500 error)
- Fix update_tree() method to be async
- Fix delete_tree() method to be async
- Add missing _check_connection() calls for consistency
- Remove debugging code from frontend

This fixes the 'object dict can't be used in await expression' error
that was preventing tree editing from working properly.

static/js/tree-track-app.js

@@ -124,6 +124,7 @@ export class TreeTrackApp {
     
     async checkForEditTree() {
         const editTreeId = localStorage.getItem('editTreeId');
+        
         if (editTreeId) {
             // Clear the localStorage item to prevent repeated loads
             localStorage.removeItem('editTreeId');

supabase_database.py

@@ -93,8 +93,9 @@ class SupabaseDatabase:
             logger.error(f"Error retrieving trees: {e}")
             raise
     
-    def get_tree(self, tree_id: int) -> Optional[Dict[str, Any]]:
+    async def get_tree(self, tree_id: int) -> Optional[Dict[str, Any]]:
         """Get a specific tree by ID"""
+        self._check_connection()
         try:
             result = self.client.table('trees') \
                                .select("*") \
@@ -109,8 +110,9 @@ class SupabaseDatabase:
             logger.error(f"Error retrieving tree {tree_id}: {e}")
             raise
     
-    def update_tree(self, tree_id: int, tree_data: Dict[str, Any]) -> Dict[str, Any]:
+    async def update_tree(self, tree_id: int, tree_data: Dict[str, Any]) -> Dict[str, Any]:
         """Update a tree record"""
+        self._check_connection()
         try:
             # Remove id from update data if present
             update_data = {k: v for k, v in tree_data.items() if k != 'id'}
@@ -131,8 +133,9 @@ class SupabaseDatabase:
             logger.error(f"Error updating tree {tree_id}: {e}")
             raise
     
-    def delete_tree(self, tree_id: int) -> bool:
+    async def delete_tree(self, tree_id: int) -> bool:
         """Delete a tree record"""
+        self._check_connection()
         try:
             result = self.client.table('trees') \
                                .delete() \