Add date and ticket filters plus entry list to the project time report.

Co-authored-by: Cursor <cursoragent@cursor.com>

internal/ticket/report.go

@@ -3,6 +3,7 @@ package ticket
 import (
 	"fmt"
 	"sort"
+	"strings"
 	"time"
 )
 
@@ -155,3 +156,62 @@ func TotalDuration(entries []TimeEntry) time.Duration {
 	}
 	return sum
 }
+
+// TimeFilter selects which time entries belong in a report.
+// From/To are inclusive bounds on the entry's work instant (Start, else End).
+// Zero times mean no bound on that side.
+type TimeFilter struct {
+	From     time.Time
+	To       time.Time
+	TicketID string
+}
+
+// FilterEntries returns entries matching f. The input slice is not modified.
+func FilterEntries(entries []TimeEntry, f TimeFilter) []TimeEntry {
+	if f.From.IsZero() && f.To.IsZero() && f.TicketID == "" {
+		out := make([]TimeEntry, len(entries))
+		copy(out, entries)
+		return out
+	}
+	out := make([]TimeEntry, 0, len(entries))
+	for _, e := range entries {
+		if f.TicketID != "" && e.TicketID != f.TicketID {
+			continue
+		}
+		when := e.Start
+		if when.IsZero() {
+			when = e.End
+		}
+		if !f.From.IsZero() && (when.IsZero() || when.Before(f.From)) {
+			continue
+		}
+		if !f.To.IsZero() && (when.IsZero() || when.After(f.To)) {
+			continue
+		}
+		out = append(out, e)
+	}
+	return out
+}
+
+// ParseReportDay parses YYYY-MM-DD as local midnight. Empty returns zero time.
+func ParseReportDay(s string) (time.Time, error) {
+	s = strings.TrimSpace(s)
+	if s == "" {
+		return time.Time{}, nil
+	}
+	t, err := time.ParseInLocation("2006-01-02", s, time.Local)
+	if err != nil {
+		return time.Time{}, fmt.Errorf("invalid date %q", s)
+	}
+	return t, nil
+}
+
+// EndOfReportDay returns the last instant of the calendar day of t in local time.
+func EndOfReportDay(t time.Time) time.Time {
+	if t.IsZero() {
+		return t
+	}
+	local := t.In(time.Local)
+	y, m, d := local.Date()
+	return time.Date(y, m, d, 23, 59, 59, 999999999, time.Local)
+}