test: make the Google Maps ftid path honest + cover the URL helper

The Places API googleMapsUri is a cid-style URL with no ftid, so the
search/getPlaceDetails fixtures had stored a fabricated ftid. Switch them
to real cid URLs and assert google_ftid is null — the precise
query_place_id link still fixes the wrong-spot bug — and document the
behaviour on googleFtidFromMapsUrl.

- add a direct googleFtidFromMapsUrl test: extracts a real /place ftid,
  returns null for a cid URL, rejects malformed/hostile values
- add placeGoogleMaps.test.ts covering the whole fallback chain
  (ftid -> place_id -> details URL -> coords) and the hostile-ftid rejection
- PlaceInspector: use a freshly-fetched ftid when the place hasn't stored one

client/src/components/Planner/PlaceInspector.tsx

@@ -165,7 +165,11 @@ export default function PlaceInspector({
 
   const openingHours = googleDetails?.opening_hours || null
   const openNow = googleDetails?.open_now ?? null
-  const googleMapsUrl = getGoogleMapsUrlForPlace(place, googleDetails?.google_maps_url)
+  // Prefer the place's stored ftid; if it has none yet, use the one just fetched from Google.
+  const googleMapsUrl = getGoogleMapsUrlForPlace(
+    place ? { ...place, google_ftid: place.google_ftid || googleDetails?.google_ftid || null } : null,
+    googleDetails?.google_maps_url,
+  )
   const selectedDay = days?.find(d => d.id === selectedDayId)
   const weekdayIndex = getWeekdayIndex(selectedDay?.date)
 

client/src/components/Planner/placeGoogleMaps.test.ts

@@ -0,0 +1,36 @@
+import { describe, it, expect } from 'vitest'
+import { getGoogleMapsUrlForPlace } from './placeGoogleMaps'
+
+const base = { name: 'Eiffel Tower', lat: 48.8584, lng: 2.2945, google_place_id: null, google_ftid: null } as any
+
+describe('getGoogleMapsUrlForPlace', () => {
+  it('FE-PLACE-GMAPS-001: uses a valid ftid for a precise /place link', () => {
+    const url = getGoogleMapsUrlForPlace({ ...base, google_ftid: '0x47e66e2964e34e2d:0x8ddca9ee380ef7e0' })
+    expect(url).toBe('https://www.google.com/maps/place/?q=Eiffel%20Tower&ftid=0x47e66e2964e34e2d:0x8ddca9ee380ef7e0')
+  })
+
+  it('FE-PLACE-GMAPS-002: falls back to query_place_id when there is no ftid', () => {
+    const url = getGoogleMapsUrlForPlace({ ...base, google_place_id: 'ChIJ123' })
+    expect(url).toBe('https://www.google.com/maps/search/?api=1&query=Eiffel%20Tower&query_place_id=ChIJ123')
+  })
+
+  it('FE-PLACE-GMAPS-003: ignores a malformed/hostile ftid and falls through to the place id', () => {
+    const url = getGoogleMapsUrlForPlace({ ...base, google_ftid: '0xAB&q=evil', google_place_id: 'ChIJ123' })
+    expect(url).toBe('https://www.google.com/maps/search/?api=1&query=Eiffel%20Tower&query_place_id=ChIJ123')
+  })
+
+  it('FE-PLACE-GMAPS-004: uses the details URL when there is no ftid or place id', () => {
+    const url = getGoogleMapsUrlForPlace(base, 'https://maps.google.com/?cid=123')
+    expect(url).toBe('https://maps.google.com/?cid=123')
+  })
+
+  it('FE-PLACE-GMAPS-005: falls back to coordinates as a last resort', () => {
+    const url = getGoogleMapsUrlForPlace(base)
+    expect(url).toBe('https://www.google.com/maps/search/?api=1&query=48.8584,2.2945')
+  })
+
+  it('FE-PLACE-GMAPS-006: returns null for no place or no location', () => {
+    expect(getGoogleMapsUrlForPlace(null)).toBeNull()
+    expect(getGoogleMapsUrlForPlace({ ...base, lat: null, lng: null })).toBeNull()
+  })
+})