add lookback on start, added parsing for ','s

parser/parser_test.go

@@ -19,6 +19,8 @@ func TestParseKM(t *testing.T) {
 		{"30 miles today", 30 * miToKM, true},
 		{"Did a 100k ride", 100, true},
 		{"Went for a 80k loop", 80, true},
+		{"5,981.9 miles", 5981.9 * miToKM, true},
+		{"1,000km ride", 1000, true},
 		// Should NOT match — no cycling context for bare "k"
 		{"Listened to 100k songs", 0, false},
 		// No distance at all