Daily Plan Projections - behavior for creating projections

Current Situation

• Web Service - generate Projections behavior
  • Two groups are generated:
    • Planned - marked in GUI in green (planned=true in JSON)
      • These entries correspond to DailyPlan entries that have already been planned/submitted.
      • The date range for these items consists of two ranges:
        • 2 months before generation date
          • used to display "old" entries e.g. for visual comparison with calculated projection items.
          • the 2-month value is hard-coded and not configurable.
        • Until last available planned date
      • Example:
        • Settings-dailyplan->projections_month_ahead=6
        • Generation date: 2025-08-21
        • Planned first day: 2025-06-21 (2 months ago)
        • Planned last day: 202x-xx-xx (last planned date)
      • Issue: Instead of a fixed Settings-dailyplan->projections_month_ahead months, the range ends at the last date already planned/submitted in the DailyPlan.
      • Issue: If a planned date contains no periods (e.g. all orders for this date were manually removed), the date is not marked as planned.
        • As a result, projections are incorrectly generated for this date.
    • Projections - marked in GUI in orange
      • Calculated projections based on schedules with the "Plan Order Automatically" definition.
      • Generates projections from a start point according to the Settings-dailyplan->projections_month_ahead for <n> months ahead (including the last day of the month).
      • Issue: Currently, the start date internally uses the last planned date.
        • If a DailyPlan is manually generated for 1 day a month in advance, the projection takes that day, creating a gap for the month.
        • If a DailyPlan is manually generated for 1 day a year in advance, the projection may not generate any entries if the Settings-dailyplan->projections_month_ahead setting is less than 1 year.
• GUI
  • Calendar View
    • Issue: If a planned date contains no periods, the GUI shows an empty green field instead of displaying 0 as the number of periods.
  • Calendar View - Yearly
    • Issue: If "Inverted Projections" is checked, only the days of the month are displayed in the calendar, but not the number of inverted periods.
  • Export Function
    • Issue: if a planned date contains no periods, this date is missing in the export file.
  • Date View
    • Check Box: “Current Controller”
      • Checked
        • Planned and projection data (workflows, schedules, periods) are visible for the selected date - OK.
        • Issue: If "Inverted Projections" is checked, no data about workflows etc. is displayed.
      • Not checked
        • Planned
          • Issue: New column “Controller ID” is added but empty.
        • Projections
          • Issue: Data about workflows, schedules, and periods is completely missing.

Desired Behaviour

• Web Service - generate Projections behavior:
  • Planned
    • Instead of the hard-coded 2 months, a new setting is introduced: Settings-dailyplan->projections_month_before . Default=2.
    • Start date should be the first day of the month (not exactly <n> months before).
    • End date should extend <n> months after the generation date, according to the Settings-dailyplan->projections_month_ahead setting (including the last day of the month).
    • A date should still be marked as planned even if no periods exist (i.e., a DailyPlan entry without periods should not be treated as "not planned").
  • Projections
    • Should start calculation from the actual start date and generate projections for all dates in the range except the dates that are already planned.
    • End date should extend <n> months after the generation date, according to the Settings-dailyplan->projections_month_ahead setting (including the last day of the month).
• GUI
  • The GUI should correctly display all planned and projection data without missing workflows, schedules, or periods.

Test Instructions

• Generate the DailyPlan for a new date (or use an existing one) and remove all orders.
  • Expected result: After projections are re-created, the date is marked as planned and the calendar view shows 0 periods.
• Generate the DailyPlan for a new date 1 month in advance.
  • Expected result: After projections are re-created, no gap occurs.
• See GUI-related issues
  • e.g. check all GUI filters and the Export function