Support dual timesheet views for consultants

Added functionality to display current and previous month timesheets side by side for consultants. This involved updating query parameters to accommodate two datasets and adjusting the component state management for handling both months. Additionally, removed specific style constraints in AllocationCalendar for a more flexible layout.

backend/src/models/analytics/revenue_tracking.py

@@ -1,3 +1,4 @@
+import calendar
 import globals
 
 from datetime import date, datetime, timedelta
@@ -255,6 +256,33 @@ def process_project(date_of_interest: date, case: Case, project, timesheet_df: p
                     "fee": fee,
                     "fixed": True
                 }
+            elif case.pre_contracted_value:
+                fee = case.pre_contracted_value / 100
+
+                should_do_pro_rata = (
+                    case.start_of_contract 
+                    and case.start_of_contract.year == date_of_interest.year 
+                    and case.start_of_contract.month == date_of_interest.month
+                )
+
+                if should_do_pro_rata:
+                    fee = fee * (date_of_interest.day / calendar.monthrange(date_of_interest.year, date_of_interest.month)[1])
+
+                should_do_pro_rata = (
+                    case.end_of_contract 
+                    and case.end_of_contract.year == date_of_interest.year 
+                    and case.end_of_contract.month == date_of_interest.month
+                )
+
+                if should_do_pro_rata:
+                    fee = fee * (calendar.monthrange(date_of_interest.year, date_of_interest.month)[1] / date_of_interest.day)
+
+                return {
+                    "kind": project.kind,
+                    "name": project.name,
+                    "fee": project.billing.fee / 100,
+                    "fixed": True
+                }
             else:
                 project_df = timesheet_df[timesheet_df["ProjectId"] == project.id]
                 if len(project_df) == 0: