fix(finance-table): refine budget and variance calculations for improved accuracy

- Updated budget calculations to consistently include fixed costs across all tasks.
- Adjusted variance logic to align with the new budget calculations, ensuring accurate financial reporting.
- Increased save delay for fixed cost input to 5 seconds, allowing users more time to edit values.
- Added text selection on input focus for better user experience.

worklenz-frontend/src/pages/projects/projectView/finance/finance-tab/finance-table/finance-table-wrapper.tsx

@@ -85,13 +85,14 @@ const FinanceTableWrapper: React.FC<FinanceTableWrapperProps> = ({ activeTablesL
         } else {
           // Leaf task - calculate values from individual task properties
           const leafTotalActual = (task.actual_cost_from_logs || 0) + (task.fixed_cost || 0);
+          const leafTotalBudget = (task.estimated_cost || 0) + (task.fixed_cost || 0);
           return {
             hours: acc.hours + (task.estimated_seconds || 0),
             cost: acc.cost + (task.actual_cost_from_logs || 0),
             fixedCost: acc.fixedCost + (task.fixed_cost || 0),
-            totalBudget: acc.totalBudget + (task.estimated_cost || 0),
+            totalBudget: acc.totalBudget + leafTotalBudget,
             totalActual: acc.totalActual + leafTotalActual,
-            variance: acc.variance + (leafTotalActual - (task.estimated_cost || 0)),
+            variance: acc.variance + (leafTotalActual - leafTotalBudget),
             total_time_logged: acc.total_time_logged + (task.total_time_logged_seconds || 0),
             estimated_cost: acc.estimated_cost + (task.estimated_cost || 0)
           };

worklenz-frontend/src/pages/projects/projectView/finance/finance-tab/finance-table/finance-table.tsx

@@ -230,10 +230,9 @@ const FinanceTable = ({
       // Only save if the value actually changed
       if (newFixedCost !== currentFixedCost && value !== null) {
         handleFixedCostChange(value, taskId);
-        setSelectedTask(null);
-        setEditingFixedCostValue(null);
+        // Don't close the input automatically - let user explicitly close it
       }
-    }, 1000); // Save after 1 second of inactivity
+    }, 5000); // Save after 5 seconds of inactivity
   };
 
   // Immediate save function (for enter/blur)
@@ -442,6 +441,10 @@ const FinanceTable = ({
               // Immediate save on enter
               immediateSaveFixedCost(editingFixedCostValue, task.id);
             }}
+            onFocus={(e) => {
+              // Select all text when input is focused
+              e.target.select();
+            }}
             autoFocus
             style={{ width: '100%', textAlign: 'right', fontSize: Math.max(12, 14 - level * 0.5) }}
             formatter={(value) => `${value}`.replace(/\B(?=(\d{3})+(?!\d))/g, ',')}
@@ -472,22 +475,27 @@ const FinanceTable = ({
           </Typography.Text>
         );
       case FinanceTableColumnKeys.VARIANCE:
+        const taskTotalBudgetForVariance = (task.estimated_cost || 0) + (task.fixed_cost || 0);
+        const taskTotalActualForVariance = (task.actual_cost_from_logs || 0) + (task.fixed_cost || 0);
+        const taskVariance = taskTotalActualForVariance - taskTotalBudgetForVariance;
         return (
           <Typography.Text 
             style={{ 
-              color: task.variance > 0 ? '#FF0000' : '#6DC376',
+              color: taskVariance > 0 ? '#FF0000' : '#6DC376',
               fontSize: Math.max(12, 14 - level * 0.5)
             }}
           >
-            {task.variance < 0 ? '+' + formatNumber(Math.abs(task.variance)) : 
-             task.variance > 0 ? '-' + formatNumber(task.variance) : 
-             formatNumber(task.variance)}
+            {taskVariance < 0 ? '+' + formatNumber(Math.abs(taskVariance)) : 
+             taskVariance > 0 ? '-' + formatNumber(taskVariance) : 
+             formatNumber(taskVariance)}
           </Typography.Text>
         );
       case FinanceTableColumnKeys.TOTAL_BUDGET:
-        return <Typography.Text style={{ fontSize: Math.max(12, 14 - level * 0.5) }}>{formatNumber(task.total_budget)}</Typography.Text>;
+        const taskTotalBudget = (task.estimated_cost || 0) + (task.fixed_cost || 0);
+        return <Typography.Text style={{ fontSize: Math.max(12, 14 - level * 0.5) }}>{formatNumber(taskTotalBudget)}</Typography.Text>;
       case FinanceTableColumnKeys.TOTAL_ACTUAL:
-        return <Typography.Text style={{ fontSize: Math.max(12, 14 - level * 0.5) }}>{formatNumber(task.total_actual)}</Typography.Text>;
+        const taskTotalActual = (task.actual_cost_from_logs || 0) + (task.fixed_cost || 0);
+        return <Typography.Text style={{ fontSize: Math.max(12, 14 - level * 0.5) }}>{formatNumber(taskTotalActual)}</Typography.Text>;
       case FinanceTableColumnKeys.COST:
         return <Typography.Text style={{ fontSize: Math.max(12, 14 - level * 0.5) }}>{formatNumber(task.actual_cost_from_logs || 0)}</Typography.Text>;
       default: