implement contract cancellation feature and update contract statuses

- Added functionality to cancel contracts, allowing users to provide a reason for cancellation.
- Updated contract statuses to include SUSPENDED and changed CLOSED to COMPLETED.
- Enhanced the UI to reflect the new cancellation option and updated messaging for contract statuses.
- Refactored contract booking actions to accommodate changes in booking logic for ONE_TIME and GENERAL contracts.
- Removed clearance document management from the contract detail page, as it is now handled per booking.
- Introduced a SQL script to reset bookings and train schedules for development purposes.

apps/edr-freight-web/backoffice/src/components/contracts/ContractDocumentEditorModal.tsx

@@ -37,6 +37,13 @@ function newArticleId(): string {
   return `art-${Date.now()}-${Math.floor(Math.random() * 1e6)}`;
 }
 
+/** Midnight today — the earliest day a contract's validity may start. */
+function startOfToday(): Date {
+  const d = new Date();
+  d.setHours(0, 0, 0, 0);
+  return d;
+}
+
 interface EditableArticle {
   id: string;
   title: string;
@@ -118,6 +125,14 @@ export function ContractDocumentEditorModal({
     );
   }, [opened, draft]);
 
+  // Accept mode opens on today — a contract never starts in the past, and the
+  // pickers below refuse earlier days.
+  useEffect(() => {
+    if (!opened || mode !== "accept") return;
+    setValidityStart(startOfToday());
+    setValidityEnd(null);
+  }, [opened, mode]);
+
   // Default validity to the first configured option (accept mode).
   // useEffect(() => {
   //   if (mode === "accept" && !validityDays && validityOptions.length > 0) {
@@ -419,6 +434,7 @@ export function ContractDocumentEditorModal({
                   placeholder="Contract validity start"
                   value={validityStart}
                   onChange={(v) => setValidityStart(v ? new Date(v) : null)}
+                  minDate={startOfToday()}
                   maxDate={validityEnd ?? undefined}
                   clearable
                 />
@@ -427,7 +443,7 @@ export function ContractDocumentEditorModal({
                   placeholder="Contract validity end"
                   value={validityEnd}
                   onChange={(v) => setValidityEnd(v ? new Date(v) : null)}
-                  minDate={validityStart ?? undefined}
+                  minDate={validityStart ?? startOfToday()}
                   clearable
                 />
               </Group>