Tours: day GPX import, wanderer trails and planning over an import

- GPX files drop onto the map or a day; the import lands on that day
- wanderer connection per user in Integrations; the workspace offers the
  user's own trails only, behind an admin switch under the Tours addon
- wanderer difficulty is stored on the SAC scale (T1 to T3), backfilled
- a GPX or wanderer import can be planned as an editable tour, either in
  place (the recorded track is kept and can be restored) or as a new tour
  that remembers the import it came from
- rails, rows and detail dialog follow the plan sidebar's cards and badges
- admin addon shelves with more than one row fold, collapsed by default
- reverse-geocoded waypoint names are cached on the device

shared/scripts/i18n-untranslated-baseline.json

@@ -242,7 +242,7 @@
     "storage.ts": { "marked": 0, "identical": 4 },
     "system_notice.ts": { "marked": 0, "identical": 4 },
     "todo.ts": { "marked": 0, "identical": 1 },
-    "tours.ts": { "marked": 0, "identical": 3 },
+    "tours.ts": { "marked": 0, "identical": 2 },
     "transport.ts": { "marked": 0, "identical": 2 },
     "trip.ts": { "marked": 0, "identical": 7 },
     "undo.ts": { "marked": 0, "identical": 1 },
@@ -352,7 +352,6 @@
   },
   "ja": {
     "admin.ts": { "marked": 0, "identical": 9 },
-    "budget.ts": { "marked": 0, "identical": 1 },
     "common.ts": { "marked": 12, "identical": 0 },
     "help.ts": { "marked": 0, "identical": 2 },
     "journey.ts": { "marked": 110, "identical": 2 },