fix: the findings of the final 4.3.0 audit

Every file the release touches was read once more, and what survived an
independent check against the code is fixed here, with a test for each.

Data and credentials
- A document sync connection edited to a new address no longer carries the
  stored token along: a blank form under another origin is refused, the same
  rule the probe route already had. Dawarich and AirTrail testConnection send
  the stored key only to the host it was stored for.
- The key rotation script now covers document_connections.secrets and
  trip_document_links.webhook_secret, which it had skipped.
- Turning a booked night into a pause in the road trip popup asks first and
  says that the booking and its expense go with it. Deleting a place says the
  same when a night is booked there, on the desktop and on the phone.
- A moved version marker over unchanged bytes no longer replaces the TREK file
  and its attachments; a real revision carries the attachments over.

Planner
- A drop in the day plan names the row it lands ahead of in the full day, so a
  hidden hotel stop no longer shifts it one slot early; the store sorts before
  it splices. Via re-anchoring, the booked-night guard and the sidebar's day
  membership read the stored day, the index space the server uses.
- A hotel stop placed mid-day re-pins the road trip vias of that day, and the
  booking session receives the new stop order too. The Public API and the iCal
  feed list a booked hotel once. A plugin can no longer write a stay against
  another trip's day.

Road trip and map
- The route overview paces its requests to the public routers and retries a
  rate limit, and it says which legs it could not route instead of quietly
  reporting a shorter trip. A click on a via handle no longer drops a second
  via; handles hide when zooming out. Read-only members cannot edit the driving
  limits. The phone shows a way back when no day is picked and prints the night
  drive departure in the chosen clock format.

Integrations and search
- Google transit keeps conventional trains when the train chip is on.
  TREK_PLACES_ENABLED=false stops the details and enrichment calls too, and
  accepts the whole boolean family. A caller-supplied description no longer
  lands in the instance-wide enrichment cache. Nominatim searches carry a
  timeout. An OSM place id is checked for shape before it reaches Overpass.
- Dawarich puts a stay on the trip whose dates hold it, the Atlas hand-off
  knows what the Atlas already shows, and a host change with a new key clears
  the old instance's state.
- Document sync: a webhook address pasted by hand works on the token alone,
  deleting a connection unregisters its subscriptions, Nextcloud under a
  sub-path connects, Synology answers a name collision before uploading and
  verifies a move into the bin, Paperless titles are capped at 128 characters,
  a DNS failure reads as unreachable rather than as a policy verdict, videos
  from the store are accepted like uploads, and remote_missing has a way out.
  Conflict buttons only for the owner, a refused choice is reported, a refused
  credential gets a Reconnect button, disconnecting asks first on the desktop
  as it does on the phone, and the folder picker no longer spins forever.

Release
- The server holds the release notice back from a bundle that cannot draw it,
  so the previous shell served from the service worker cache after an update
  no longer shows bare keys and no longer lets a click use the notice up.
- Import into an existing list gets the same body limit as a new list. Chat
  images say when the limit is reached and the new controls are translated.
  The transit backend switch reports a failed save. The Helm chart carries the
  Amap credentials in its Secret; the shipped templates document the Places
  API and Amap variables and the Overpass default. The wiki follows.

docker-compose.yml

@@ -53,6 +53,11 @@ services:
 #      - LLM_TIMEOUT_MS=900000 # Optional. Ceiling (ms) for one AI-parsing call before it is abandoned, applied to every provider and to the HTTP client underneath. Generous by default so heavier documents fit; lower it on a cloud provider to fail fast. Must be a whole number of milliseconds between 1 and 2147483647 — anything else stops the server at startup with the reason. (default: 900000)
 #      - TREK_PLUGINS_IGNORE_TREK_RANGE=true # Optional. Lets plugins whose declared TREK version range predates this build, and plugins that declare none, be installed and activated anyway. Every gate warns instead of refusing; the plugin-API version gate and the Discover compatibility verdict stay hard. Off unless set. (default: off)
 #      - UNSPLASH_ACCESS_KEY= # Optional. Unsplash Access Key for trip-cover / place-image search. Without one, TREK uses Unsplash's unauthenticated endpoint, which some datacenter/VPS IPs are blocked from (#1449). Free key at unsplash.com/developers. Can also be set per-admin in Admin > Settings; the env var overrides that.
+#      - TREK_PLACES_ENABLED=false # Optional. Place search (suggestions, full search, category buttons, Road trip search, import geocoding, offline downloads) asks the TREK Places API at https://places.liketrek.com by default, so the server makes outbound requests to that host. Set false to search the way it did before 4.3.0 (OpenStreetMap, or your Google/Amap key) and send nothing there. No switch in the admin panel on purpose: whether searches leave the instance is decided here. (default: true)
+#      - TREK_PLACES_URL=https://places.liketrek.com # Optional. Base URL of a copy of the Places API you run yourself; it has to answer the same /v1 API. Read from configuration rather than typed by a user, so an address on your LAN or Docker network works without ALLOW_INTERNAL_NETWORK. (default: https://places.liketrek.com)
+#      - AMAP_API_KEY= # Optional. Amap (高德地图) Web 服务 key for place search and geocoding inside mainland China. Overrides the key set in Admin > Settings > API Keys. A Web 端 (JS API) key is a different credential and is rejected with INVALID_USER_KEY.
+#      - AMAP_API_SECRET= # Optional. The private secret (数字签名) of that key. Required exactly when the key was created with signing enabled, because such a key rejects every unsigned request. Leave unset otherwise.
+#      - AMAP_API_BASE=https://restapi.amap.com # Optional. Send the Amap calls through an egress proxy, a cache or a gateway that speaks the same API instead of restapi.amap.com directly. (default: https://restapi.amap.com)
     volumes:
       - ./data:/app/data
       - ./uploads:/app/uploads