feat: add /summary, /setbreak, weekly totals, and fix command dispatch for arg-bearing commands

- Add /summary [YYYY-MM] command for monthly work/break/day-off totals

- Add weekly totals row to main menu status

- Add /setbreak <minutes> for configurable daily break threshold

- Fix HandleMessage routing: extract command name instead of exact match (fixes /export YYYY-MM, /edit, /note, /summary, /setbreak)

- Update README with full command table and configurable break docs

internal/bot/summary_test.go

@@ -0,0 +1,29 @@
+package bot
+
+import (
+	"testing"
+)
+
+func TestFormatMonthTitle(t *testing.T) {
+	tests := []struct {
+		cal     string
+		year, m int
+		want    string
+	}{
+		{"gregorian", 2026, 6, "June 2026"},
+		{"gregorian", 2024, 1, "January 2024"},
+		{"jalali", 1404, 1, "Farvardin 1404"},
+		{"jalali", 1405, 12, "Esfand 1405"},
+		{"hijri", 1447, 1, "Muharram 1447"},
+		{"hijri", 1447, 12, "Dhu al-Hijjah 1447"},
+	}
+	for _, tc := range tests {
+		t.Run(tc.want, func(t *testing.T) {
+			got := formatMonthTitle(tc.cal, tc.year, tc.m)
+			if got != tc.want {
+				t.Errorf("formatMonthTitle(%q, %d, %d) = %q, want %q",
+					tc.cal, tc.year, tc.m, got, tc.want)
+			}
+		})
+	}
+}