fix(import): a booking the AI reads without its venue is asked for one, and a failed import does not look like a success

Gemini behind the OpenAI-compatible provider decodes against the JSON schema
TREK sends and fills declared properties only. reservationFor was an open
object without any, so the model left it out: a Booking.com stay came back
with its dates and price but no hotel name, and the mapper had to drop it
(#2477). It is the same cause as #1638, whose fix only made the JSON readable.

The schema now declares every field the prompt names inside reservationFor,
for venues, flights, trains, buses, boats, events and rental cars, at most two
levels deep, and requires it; the car desks at the root get the same venue
fields. Every object stays open to keys the prompt does not name.

On the cloud AI path an answer is cleaned up before it is mapped. Exact
duplicate nodes are dropped, so one stay is one booking. priceCurrency is read
as an ISO 4217 code ("EURials" is EUR, a lone symbol maps to its code); when
the model names none, a priced node takes the currency of the document's
total, and otherwise the field goes instead of saving a code nobody can
convert. The kitinerary path is untouched.

The import upload decodes file names as UTF-8 like every other upload route.
"Bestätigung.pdf" reached the warnings as mojibake, and the review could not
attach the file to the booking it created, because it matches on the name.
The OpenAI-compatible client logs which response_format the answering
attempt carried, metadata only, so the next report shows whether the schema
reached the model at all.

The background import card showed a green tick beside "no reservations could
be extracted". A parse that found nothing now wears the warning mark instead;
it is the same card on the desktop and on the phone.

client/src/components/BackgroundTasks/BackgroundTasksWidget.extra.test.tsx

@@ -1,4 +1,4 @@
-// FE-W4BGT-001 to FE-W4BGT-022
+// FE-W4BGT-001 to FE-W4BGT-024
 import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest'
 import { screen, act, waitFor } from '@testing-library/react'
 import { render, fireEvent } from '../../../tests/helpers/render'
@@ -276,3 +276,30 @@ describe('BackgroundTasksWidget — AI retry', () => {
     expect(await screen.findByText('No model configured')).toBeInTheDocument()
   })
 })
+
+/**
+ * The reporter's phone showed a green tick beside "No reservations could be
+ * extracted" and two warnings (#2477). A parse that found nothing is not a
+ * success, so it wears the warning mark; the tick stays for a parse that did.
+ */
+describe('BackgroundTasksWidget: the mark on a finished job (#2477)', () => {
+  it('FE-W4BGT-023: a job that found nothing shows the warning mark, not the success tick', () => {
+    useBackgroundTasksStore.setState({
+      tasks: [task({ items: [], warnings: ['Incomplete LodgingReservation in booking.pdf[0] (no reservationFor)'] })],
+    })
+    const { baseElement } = render(<BackgroundTasksWidget />)
+
+    expect(screen.getByText('No reservations could be extracted from the uploaded files.')).toBeInTheDocument()
+    expect(baseElement.querySelector('svg.lucide-alert-triangle')).not.toBeNull()
+    expect(baseElement.querySelector('svg.lucide-check-circle2')).toBeNull()
+    expect(baseElement.querySelector('.animate-spin')).toBeNull()
+  })
+
+  it('FE-W4BGT-024: a job with items keeps the success tick, even with warnings', () => {
+    useBackgroundTasksStore.setState({ tasks: [task({ items: [{ id: 1 }] as never, warnings: ['could not locate "X"'] })] })
+    const { baseElement } = render(<BackgroundTasksWidget />)
+
+    expect(baseElement.querySelector('svg.lucide-check-circle2')).not.toBeNull()
+    expect(baseElement.querySelector('svg.lucide-alert-triangle')).toBeNull()
+  })
+})

client/src/components/BackgroundTasks/BackgroundTasksWidget.tsx

@@ -1,7 +1,7 @@
 import { createPortal } from 'react-dom'
 import { useEffect, useRef, useState } from 'react'
 import { useNavigate } from 'react-router'
-import { Loader2, CheckCircle2, AlertCircle, X } from 'lucide-react'
+import { Loader2, CheckCircle2, AlertCircle, AlertTriangle, X } from 'lucide-react'
 import { useTranslation } from '../../i18n'
 import { addListener, removeListener } from '../../api/websocket'
 import { reservationsApi, healthApi } from '../../api/client'
@@ -141,7 +141,11 @@ export default function BackgroundTasksWidget() {
         >
           <div style={{ flexShrink: 0, marginTop: 1 }}>
             {(task.status === 'running' || (task.status === 'done' && task.items === undefined)) && <Loader2 size={16} className="animate-spin" color="var(--accent)" />}
-            {task.status === 'done' && task.items !== undefined && <CheckCircle2 size={16} color="#10b981" />}
+            {task.status === 'done' && task.items !== undefined && task.items.length > 0 && <CheckCircle2 size={16} color="#10b981" />}
+            {/* A parse that found nothing is not a success, whatever the job
+                status says: the same card used to show a green tick next to
+                "no reservations could be extracted" (#2477). */}
+            {task.status === 'done' && task.items?.length === 0 && <AlertTriangle size={16} color="var(--warning)" />}
             {task.status === 'error' && <AlertCircle size={16} color="#ef4444" />}
           </div>