Add timeclock break/lunch tracking, manual entries, and attendance period picker

- ClockEntryType enum (Work/Break/Lunch) on EmployeeClockEntry; default 0 = Work
  so all existing entries are unaffected
- Migration AddClockEntryType applied
- Break and Lunch buttons on clock status card (only when AllowMultiplePunchesPerDay
  is enabled); GoOnBreak closes current Work segment and opens Break/Lunch segment
- Return to Work button when on break/lunch; closes break segment, opens new Work
- Status badges on clock card and Who'\''s In grid: Working / On Break / At Lunch
- Break/Lunch hours excluded from all day totals, week totals, metrics, and CSV
- Manager: Manual Entry modal to create a time entry for any company employee
- Attendance report defaults to current ISO week; Week/Month mode toggle with
  auto-submitting dropdowns (last 12 weeks or months); period label shown inline
- Attendance CSV: Type column added; day/week totals blank on Break/Lunch rows;
  filename uses period label
- Week subtotal rows suppressed in single-week view (shown in month view only)
- Help article and AI knowledge base updated for all new features

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/PowderCoating.Application/DTOs/Timeclock/TimeclockDtos.cs

@@ -1,3 +1,5 @@
+using PowderCoating.Core.Enums;
+
 namespace PowderCoating.Application.DTOs.Timeclock;
 
 public class EmployeeClockEntryDto
@@ -8,6 +10,7 @@ public class EmployeeClockEntryDto
     public DateTime ClockInTime { get; set; }
     public DateTime? ClockOutTime { get; set; }
     public decimal? HoursWorked { get; set; }
+    public ClockEntryType EntryType { get; set; } = ClockEntryType.Work;
     public string? Notes { get; set; }
     public bool IsOpen => ClockOutTime == null;
 }
@@ -41,6 +44,25 @@ public class EditClockEntryRequest
     public string? Notes { get; set; }
 }
 
+/// <summary>
+/// Sent when an employee clicks Break or Lunch to pause their work segment.
+/// The server closes the current Work entry and opens a Break/Lunch entry.
+/// </summary>
+public class GoOnBreakRequest
+{
+    /// <summary>Must be <see cref="ClockEntryType.Break"/> or <see cref="ClockEntryType.Lunch"/>.</summary>
+    public ClockEntryType BreakType { get; set; }
+}
+
+/// <summary>Manager request to create a time entry on behalf of any company employee.</summary>
+public class ManualEntryRequest
+{
+    public string UserId { get; set; } = string.Empty;
+    public DateTime ClockInTime { get; set; }
+    public DateTime? ClockOutTime { get; set; }
+    public string? Notes { get; set; }
+}
+
 /// <summary>Employee tile shown on the kiosk employee-selection grid.</summary>
 public class KioskEmployeeDto
 {