Add train deactivation feature and import train number management

- Introduced DEACTIVATED status for trains, allowing staff to park trains indefinitely.
- Implemented methods to deactivate and reactivate trains in the TrainBuilderService.
- Added UI components for train deactivation and reactivation in TrainBuilderDetailPage.
- Created a dropdown setting for admin-managed import train numbers, with corresponding migrations.
- Updated yard code length to accommodate soft-delete suffix.
- Enhanced train status handling to include DEACTIVATED state.

apps/edr-freight-web/backoffice/src/components/trainBuilder/BuildTrainModal.tsx

@@ -16,7 +16,8 @@ import { useEffect, useState } from "react";
 import { api } from "@/services/api";
 import type { TrainComposition } from "@/services/trainBuilder.service";
 import { useToast } from "@/hooks/use-toast";
-import { IMPORT_TRAIN_OPTIONS, exportRunFor } from "@/constants/trainRuns";
+import { useImportTrainNumberOptions } from "@/hooks/useImportTrainNumberOptions";
+import { exportRunFor } from "@/constants/trainRuns";
 
 const parseError = (error: unknown, fallback: string) => {
   if (isAxiosError(error)) {
@@ -42,6 +43,9 @@ export default function BuildTrainModal({ opened, onClose, onBuilt }: BuildTrain
   const [notes, setNotes] = useState("");
 
   const yardsQuery = useQuery(api.routes.yards.queryOptions({ staleTime: 5 * 60_000 }));
+  // Admin-managed run list (dropdown settings); numbers already on a train
+  // come back disabled so they cannot be picked twice.
+  const importNumbers = useImportTrainNumberOptions();
   // Only serviceable locomotives standing in the selected yard can be coupled.
   const locomotivesQuery = useQuery(
     api.locomotives.listFiltered.queryOptions({
@@ -150,12 +154,13 @@ export default function BuildTrainModal({ opened, onClose, onBuilt }: BuildTrain
           <Select
             label="Import train number"
             description="Even — Djibouti → Ethiopia runs"
-            placeholder="e.g. 8002"
-            data={IMPORT_TRAIN_OPTIONS}
+            placeholder={importNumbers.isLoading ? "Loading…" : "e.g. 8002"}
+            data={importNumbers.options}
             value={importTrainNumber || null}
             onChange={(value) => setImportTrainNumber(value ?? "")}
             searchable
             clearable
+            nothingFoundMessage="No free run numbers — add more in Dropdown Settings"
           />
         </Group>
         <Select

apps/edr-freight-web/backoffice/src/components/trainBuilder/EditTrainDetailsModal.tsx

@@ -1,9 +1,11 @@
-import { Button, Group, Modal, Stack, Text, TextInput } from "@mantine/core";
+import { Button, Group, Modal, Select, Stack, Text, TextInput } from "@mantine/core";
 import { useMutation } from "@tanstack/react-query";
 import { Pencil } from "lucide-react";
 import { useEffect, useState } from "react";
 
+import { exportRunFor } from "@/constants/trainRuns";
 import { useToast } from "@/hooks/use-toast";
+import { useImportTrainNumberOptions } from "@/hooks/useImportTrainNumberOptions";
 import { api } from "@/services/api";
 import type { BuiltTrainSummary } from "@/services/trainBuilder.service";
 
@@ -15,9 +17,11 @@ export interface EditTrainDetailsModalProps {
 
 /**
  * Edit a built train's display identity from the list: its name and its fixed
- * import/export run numbers. Composition (yard, locomotives, wagons) is edited
- * on the detail page. Number collisions come back as a 409 with the owning
- * train's code and surface verbatim.
+ * import/export run numbers. The import number comes from the admin-managed
+ * dropdown setting (numbers on other trains are disabled; this train's own
+ * number stays pickable) and the export number follows it. Composition (yard,
+ * locomotives, wagons) is edited on the detail page. Number collisions come
+ * back as a 409 with the owning train's code and surface verbatim.
  */
 const EditTrainDetailsModal = ({ train, onClose }: EditTrainDetailsModalProps) => {
   const { toast } = useToast();
@@ -25,6 +29,8 @@ const EditTrainDetailsModal = ({ train, onClose }: EditTrainDetailsModalProps) =
   const [importNo, setImportNo] = useState("");
   const [exportNo, setExportNo] = useState("");
 
+  const importNumbers = useImportTrainNumberOptions(train?.importTrainNumber);
+
   useEffect(() => {
     if (train) {
       setName(train.trainName ?? "");
@@ -86,20 +92,29 @@ const EditTrainDetailsModal = ({ train, onClose }: EditTrainDetailsModalProps) =
           radius="md"
         />
         <Group grow>
-          <TextInput
+          <Select
             label="Import train no."
-            placeholder="e.g. 8002"
-            value={importNo}
-            onChange={(e) => setImportNo(e.currentTarget.value)}
-            maxLength={20}
+            placeholder={importNumbers.isLoading ? "Loading…" : "e.g. 8002"}
+            data={importNumbers.options}
+            value={importNo || null}
+            onChange={(value) => {
+              // Clearing keeps the stored numbers (empty inputs are dropped on
+              // save); a pick re-derives the paired export run.
+              setImportNo(value ?? "");
+              setExportNo(value ? exportRunFor(value) : (train?.exportTrainNumber ?? ""));
+            }}
+            searchable
+            clearable
+            nothingFoundMessage="No free run numbers — add more in Dropdown Settings"
             radius="md"
           />
           <TextInput
             label="Export train no."
+            description="Follows the import run"
             placeholder="e.g. 8001"
             value={exportNo}
-            onChange={(e) => setExportNo(e.currentTarget.value)}
-            maxLength={20}
+            readOnly
+            variant="filled"
             radius="md"
           />
         </Group>

apps/edr-freight-web/backoffice/src/components/trainBuilder/trainStatus.ts

@@ -15,6 +15,8 @@ export const trainStatusColor = (status: BuiltTrainStatus | string): string => {
       return "yellow";
     case "OUT_OF_SERVICE":
       return "red";
+    case "DEACTIVATED":
+      return "gray";
     default:
       return "gray";
   }