fix(calendar): say when the table holds offers opened before --from

Open offers are listed by the day they opened, so "from 2026-11-03 to
2026-11-12" sat above tenders dated in October (Pullfrog on #78). The title
adds "with offers opened earlier and still open" when such rows are there.

Claude-Session: https://claude.ai/code/session_01RqPPVeVDrnLoP7NUZmLRxY

crates/idx-cli/src/output/table.rs

@@ -1864,10 +1864,18 @@ pub fn print_corporate_calendar(
     range: &CalendarRange,
     actions: &[CorporateAction],
 ) -> Result<(), IdxError> {
+    // Offers still open are listed by the day they opened, which can be
+    // before `from`; the title says so rather than claim the range bounds
+    // every row.
+    let earlier = if actions.iter().any(|a| a.date < range.from) {
+        ", with offers opened earlier and still open"
+    } else {
+        ""
+    };
     println!(
         "{}",
         format!(
-            "Corporate actions from {} to {} ({})",
+            "Corporate actions from {} to {}{earlier} ({})",
             range.from,
             range.to,
             actions.len()

crates/idx-cli/tests/golden/stockbit-calendar.table.golden

@@ -1,6 +1,6 @@
 exit: 0
 --- stdout
-Corporate actions from 2026-11-03 to 2026-11-12 (17)
+Corporate actions from 2026-11-03 to 2026-11-12, with offers opened earlier and still open (17)
 ┌────────────┬────────┬──────────────┬────────────┬──────────────────────────────────────────────────────────────────────────┐
 │ DATE       ┆ SYMBOL ┆ KIND         ┆ EX         ┆ DETAIL                                                                   │
 ╞════════════╪════════╪══════════════╪════════════╪══════════════════════════════════════════════════════════════════════════╡