fix(auth): load every position a user holds

Staff given a post in Smart Office and another in freight only ever
loaded one of them. Two causes, both in how the IAM guard collapses the
login snapshot:

- `x-current-position-id` is read two ways inside one function: the
  employee row is matched on `position.id`, the position on
  `employeePositionId`. Freight sends the latter, Smart Office the
  former, so whichever value arrives one lookup matches nothing and
  falls back to `positions[0]`. FreightJwtGuard now matches both fields.

- IAM keeps one employee row per organization, and EDR and EDR Freight
  are separate organizations, so a user holding a post in each owns two
  rows. Only the active row reached `collectPermissionKeys`, so the
  freight post's permissions disappeared whenever the other row won the
  active slot. `employee.positions` now unions every row, which is what
  the util already does for the array shape.

`delegatedPositions` stays scoped to the active row on purpose: yard
scope widens on it, and someone standing in on another organization's
row is not this desk's stand-in.

/auth/me now returns every employee row, active row first, so the
position picker can offer a desk that is not on the active row.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

apps/edr-freight-api/src/modules/auth/freight-me.service.ts

@@ -3,6 +3,7 @@ import { InjectDataSource } from '@nestjs/typeorm';
 import type { TCurrentUser } from '@tria-plc/api-common/modules/auth/types/current-user.type';
 import { DataSource } from 'typeorm';
 
+import type { SnapshotEmployee } from '../../common/freight-jwt.guard';
 import {
   collectPermissionKeys,
   isSuperAdmin,
@@ -82,8 +83,26 @@ export class FreightMeService {
         ? [employeeRecord.position]
         : [];
 
-    const enrichedPositions = await Promise.all(
-      rawPositions.map(async (position) => {
+    // IAM keeps one employee row per organization, so a user holding a freight
+    // post and a Smart Office post owns two rows. The backoffice reads
+    // `employee` as an array and the position picker lists what it finds there
+    // — returning only the active row hides the other desk and makes it
+    // unselectable. `FreightJwtGuard` leaves the full set here.
+    const employeeRows = (user as { employeeRows?: SnapshotEmployee[] })
+      .employeeRows;
+
+    // Active row first: the backoffice reads `employee[0]` for
+    // unitId/organizationId, so the desk the caller is acting as must lead.
+    const rows: SnapshotEmployee[] = employeeRows?.length
+      ? [
+          ...employeeRows.filter((row) => row.id === employeeRecord?.id),
+          ...employeeRows.filter((row) => row.id !== employeeRecord?.id),
+        ]
+      : employeeRecord
+        ? [{ ...employeeRecord, positions: rawPositions } as SnapshotEmployee]
+        : [];
+
+    const enrichPosition = async (position: TokenPosition) => {
         const [positionType, positionTypePermissionKeys] = await Promise.all([
           this.lookupPositionType(position.id),
           this.lookupPositionTypePermissions(position.id),
@@ -114,20 +133,24 @@ export class FreightMeService {
             positionType,
           },
         };
-      }),
+    };
+
+    const enrichedRows = await Promise.all(
+      rows.map(async (row) => ({
+        row,
+        positions: await Promise.all(
+          ((row.positions ?? []) as TokenPosition[]).map(enrichPosition),
+        ),
+      })),
     );
 
-    const employee = employeeRecord
-      ? [
-          {
-            id: employeeRecord.id,
-            organizationId: employeeRecord.organizationId,
-            unitId: employeeRecord.unitId,
-            name: employeeRecord.name,
-            positions: enrichedPositions.map((p) => p.position),
-          },
-        ]
-      : [];
+    const employee = enrichedRows.map(({ row, positions }) => ({
+      id: row.id as string,
+      organizationId: row.organizationId as string,
+      unitId: row.unitId as string,
+      name: row.name,
+      positions: positions.map((p) => p.position),
+    }));
 
     // `collectPermissionKeys` reads the raw token (position-level only), so
     // union the type-level grants in — the backoffice prefers this flat list
@@ -135,7 +158,9 @@ export class FreightMeService {
     const permissionKeys = [
       ...new Set([
         ...collectPermissionKeys(user),
-        ...enrichedPositions.flatMap((p) => p.positionTypePermissionKeys),
+        ...enrichedRows.flatMap(({ positions }) =>
+          positions.flatMap((p) => p.positionTypePermissionKeys),
+        ),
       ]),
     ];