fix(report): approverName uses only included days

Move reviewer tracking logic inside the non-empty rows guard in both
approved-only and include-unapproved modes. This ensures zero-row
approved sheets don't pollute the reviewer set, fixing the approverName
calculation to only consider reviewers from included ReportDays.

Add test: approved sheet with zero rows and different reviewer correctly
excluded from approver tracking.

All 9 tests passing.
Co-Authored-By: claude-flow <ruv@ruv.net>

lib/screens/programmer_tasks/report/accomplishment_report_data.dart

@@ -129,13 +129,13 @@ AccomplishmentReportData buildAccomplishmentReportData({
                 (secondsByCategory[row.category] ?? 0) + row.seconds;
           }
         }
-      }
 
-      // Track reviewers for approved sheets
+        // Track reviewers for included approved sheets only
         if (sheet.status == DaySheetStatus.approved && sheet.reviewedBy != null) {
           allReviewers.add(sheet.reviewedBy!);
         }
       }
+    }
   } else {
     // Approved-only mode
     for (final sheet in sheetsInRange) {
@@ -159,12 +159,12 @@ AccomplishmentReportData buildAccomplishmentReportData({
                   (secondsByCategory[row.category] ?? 0) + row.seconds;
             }
           }
-        }
 
-        // Track reviewer
+          // Track reviewer for included sheets only
           if (sheet.reviewedBy != null) {
             allReviewers.add(sheet.reviewedBy!);
           }
+        }
       } else if (sheet.status == DaySheetStatus.pending) {
         excludedPending++;
       } else if (sheet.status == DaySheetStatus.disapproved) {

test/accomplishment_report_data_test.dart

@@ -606,5 +606,87 @@ void main() {
       expect(data.secondsByCategory['Meeting'], 600);
       expect(data.totalSeconds, 6900);
     });
+
+    test('approved sheet with zero rows and different reviewer does not affect approverName',
+        () {
+      final day1 = DateTime.utc(2026, 9, 1);
+      final day2 = DateTime.utc(2026, 9, 2);
+      final day3 = DateTime.utc(2026, 9, 3);
+
+      final row = DaySheetRow(
+        taskId: 't1',
+        title: 'Task 1',
+        category: 'Software Development',
+        kind: 'assignee',
+        seconds: 3600,
+        notes: [],
+      );
+
+      // Two included approved sheets with same reviewer
+      // One zero-row approved sheet with different reviewer
+      final sheets = [
+        ProgrammerDaySheet(
+          id: 'sheet1',
+          programmerId: 'prog1',
+          status: 'approved',
+          workDate: day1,
+          autoSubmitted: false,
+          resubmissions: 0,
+          reviewedBy: 'reviewer1',
+          approvedSnapshot: DaySheetSnapshot(totalSeconds: 3600, rows: [row]),
+          createdAt: DateTime.utc(2026, 9, 1),
+          updatedAt: DateTime.utc(2026, 9, 1),
+        ),
+        // Zero-row approved sheet with different reviewer (should be ignored)
+        ProgrammerDaySheet(
+          id: 'sheet2',
+          programmerId: 'prog1',
+          status: 'approved',
+          workDate: day2,
+          autoSubmitted: false,
+          resubmissions: 0,
+          reviewedBy: 'reviewer2',
+          approvedSnapshot: DaySheetSnapshot(totalSeconds: 0, rows: []),
+          createdAt: DateTime.utc(2026, 9, 2),
+          updatedAt: DateTime.utc(2026, 9, 2),
+        ),
+        ProgrammerDaySheet(
+          id: 'sheet3',
+          programmerId: 'prog1',
+          status: 'approved',
+          workDate: day3,
+          autoSubmitted: false,
+          resubmissions: 0,
+          reviewedBy: 'reviewer1',
+          approvedSnapshot: DaySheetSnapshot(totalSeconds: 3600, rows: [row]),
+          createdAt: DateTime.utc(2026, 9, 3),
+          updatedAt: DateTime.utc(2026, 9, 3),
+        ),
+      ];
+
+      final range = ReportDateRange(
+        start: DateTime.utc(2026, 9, 1),
+        end: DateTime.utc(2026, 9, 4),
+        label: 'Test Range',
+      );
+
+      final data = buildAccomplishmentReportData(
+        programmer: programmer,
+        range: range,
+        includeUnapproved: false,
+        sheets: sheets,
+        liveRowsByDay: {},
+        tasks: [],
+        profileNames: {
+          'reviewer1': 'Jane Reviewer',
+          'reviewer2': 'Bob Reviewer',
+        },
+      );
+
+      // Only 2 days included (day2 has zero rows)
+      expect(data.days.length, 2);
+      // Both included days were reviewed by reviewer1
+      expect(data.approverName, 'Jane Reviewer');
+    });
   });
 }