Refactor Cart into checkerboard table

Closes: #173 (closed)

Removes clear all feature from: #233

This one improves focus behavior in the cart, moving cart items and deleting items from the cart.

clive/__private/core/commands/data_retrieval/update_node_data.py

@@ -219,20 +219,25 @@ class UpdateNodeData(CommandDataRetrieval[HarvestedDataRaw, SanitizedData, Dynam
         )
 
     def __update_manabar(self, gdpo: DynamicGlobalProperties, max_mana: int, manabar: Manabar) -> mock_database.Manabar:
-        power_from_api = int(manabar.current_mana)
-        last_update = int(manabar.last_update_time)
+        head_block_time = gdpo.time
+        head_block_timestamp = int(head_block_time.timestamp())
+        last_update_timestamp = manabar.last_update_time
+        power_from_api = manabar.current_mana
         max_mana_value = vests_to_hive(max_mana, gdpo)
         mana_value = vests_to_hive(
             calculate_current_manabar_value(
-                now=int(gdpo.time.timestamp()),
+                now=head_block_timestamp,
                 max_mana=max_mana,
                 current_mana=power_from_api,
-                last_update_time=last_update,
+                last_update_time=last_update_timestamp,
             ),
             gdpo,
         )
         full_regeneration = self.__get_manabar_regeneration_time(
-            gdpo_time=gdpo.time, max_mana=max_mana, current_mana=power_from_api, last_update_time=last_update
+            head_block_time=head_block_time,
+            max_mana=max_mana,
+            current_mana=power_from_api,
+            last_update_time=last_update_timestamp,
         )
 
         return mock_database.Manabar(
@@ -242,18 +247,19 @@ class UpdateNodeData(CommandDataRetrieval[HarvestedDataRaw, SanitizedData, Dynam
         )
 
     def __get_manabar_regeneration_time(
-        self, gdpo_time: datetime, max_mana: int, current_mana: int, last_update_time: int
+        self, head_block_time: datetime, max_mana: int, current_mana: int, last_update_time: int
     ) -> timedelta:
         if max_mana <= 0:
             return timedelta(0)
+        head_block_timestamp = int(head_block_time.timestamp())
         return (
             calculate_manabar_full_regeneration_time(
-                now=int(gdpo_time.timestamp()),
+                now=head_block_timestamp,
                 max_mana=max_mana,
                 current_mana=current_mana,
                 last_update_time=last_update_time,
             )
-            - gdpo_time
+            - head_block_time
         )
 
     def __get_account(self, name: str) -> Account: