fix(help): a duplicated trip outlived its guide and broke another screen

The duplicate-trip guide dropped its copy by position, keeping whatever the
trips endpoint happened to answer first. The copy survived, and three files
later the journey dialog offered two entries starting "Weekend in Lisbon" and
the create-journey guide could not say which one it meant.

The copy is now dropped by name and the delete is checked, and the journey
dialog picks its trip by accessible name rather than by a substring another
trip shares. Each file passed on its own before this; only the whole suite in
one run showed it.

client/e2e/help/dashboard.guide.ts

@@ -164,11 +164,17 @@ const SCRIPTS: Record<string, GuideScript> = {
       },
     ],
     cleanup: async p => {
-      // Drop the copy over the API so the grid is back to the seed for the next guide.
+      // Drop the copy over the API so the grid is back to the seed for the next
+      // guide. By title, not by position: the list came back in an order that
+      // left the copy standing, and a trip nobody expected then broke a guide
+      // three files later, in a screen that has nothing to do with this one.
       const res = await p.request.get('/api/trips')
-      const { trips } = (await res.json()) as { trips: { id: number; title: string }[] }
-      const copies = trips.filter(t => t.title.startsWith(LISBON)).slice(1)
-      for (const t of copies) await p.request.delete(`/api/trips/${t.id}`)
+      const body = (await res.json()) as { trips?: { id: number; title: string }[] } | { id: number; title: string }[]
+      const trips = Array.isArray(body) ? body : (body.trips ?? [])
+      for (const t of trips.filter(x => x.title !== LISBON && x.title.startsWith(LISBON))) {
+        const dropped = await p.request.delete(`/api/trips/${t.id}`)
+        if (!dropped.ok()) throw new Error(`could not drop the copy "${t.title}": ${dropped.status()}`)
+      }
     },
   },
 

client/e2e/help/journey.guide.ts

@@ -147,7 +147,9 @@ const SCRIPTS: Record<string, GuideScript> = {
         act: async p => {
           await typeInto(p, dialog(p).locator('input').first(), 'Lisbon weekend')
           await typeInto(p, dialog(p).locator('input').nth(1), 'Two days of tiles and custard tarts')
-          await dialog(p).getByRole('checkbox').filter({ hasText: 'Weekend in Lisbon' }).click()
+          // By accessible name, not by a substring: a copy of the trip made by
+          // another screen's guide is also "Weekend in Lisbon something".
+          await dialog(p).getByRole('checkbox', { name: /^Weekend in Lisbon \d+ days/ }).click()
           await beat(p, 400)
         },
       },