feat(project-finance): add action to update project-specific currency

- Introduced a new action `updateProjectFinanceCurrency` in the project finance slice to allow updating the currency for individual projects.
- Updated the ProjectViewFinance component to dispatch the new action when the project currency is changed, ensuring the state reflects the selected currency.

worklenz-frontend/src/features/projects/finance/project-finance.slice.ts

@@ -164,6 +164,11 @@ export const projectFinancesSlice = createSlice({
           task.show_sub_tasks = !task.show_sub_tasks;
         }
       }
+    },
+    updateProjectFinanceCurrency: (state, action: PayloadAction<string>) => {
+      if (state.project) {
+        state.project.currency = action.payload;
+      }
     }
   },
   extraReducers: (builder) => {
@@ -222,7 +227,8 @@ export const {
   updateTaskFixedCost,
   updateTaskEstimatedCost,
   updateTaskTimeLogged,
-  toggleTaskExpansion
+  toggleTaskExpansion,
+  updateProjectFinanceCurrency
 } = projectFinancesSlice.actions;
 
 export default projectFinancesSlice.reducer;

worklenz-frontend/src/pages/projects/projectView/finance/project-view-finance.tsx

@@ -5,7 +5,7 @@ import { useTranslation } from 'react-i18next';
 import { CaretDownFilled, DownOutlined } from '@ant-design/icons';
 import { useAppDispatch } from '@/hooks/useAppDispatch';
 import { useAppSelector } from '@/hooks/useAppSelector';
-import { fetchProjectFinances, setActiveTab, setActiveGroup } from '@/features/projects/finance/project-finance.slice';
+import { fetchProjectFinances, setActiveTab, setActiveGroup, updateProjectFinanceCurrency } from '@/features/projects/finance/project-finance.slice';
 import { changeCurrency, toggleImportRatecardsDrawer } from '@/features/finance/finance-slice';
 import { updateProjectCurrency } from '@/features/project/project.slice';
 import { projectFinanceApiService } from '@/api/project-finance-ratecard/project-finance.api.service';
@@ -94,6 +94,7 @@ const ProjectViewFinance = () => {
       // Update both global currency state and project-specific currency
       dispatch(changeCurrency(currency));
       dispatch(updateProjectCurrency(upperCaseCurrency));
+      dispatch(updateProjectFinanceCurrency(upperCaseCurrency));
       
       message.success('Project currency updated successfully');
     } catch (error) {