Rework entry types: merge hotel into stay, transport with modes, auto-transport

- Type set is now activity/stay/transport/flight/rental/note; hotel, travel
  and immigration are removed with idempotent startup data migrations
  (hotel->stay, travel->transport, immigration->activity with flag prefix)
- Transport entries carry an optional mode (train/bus/ferry/taxi/drive/other)
  that drives the chip/map icon; route stops expose transport_mode
- Creating a stay auto-creates a bridging transport to its neighbouring
  stays unless a transport/flight already covers the gap (one-shot)
- Summary: transports count replaces hotels/travelLegs

public/js/views/map.js

@@ -2,7 +2,7 @@
 // per-leg km labels, and a leg-by-leg list. Graceful empty state when the
 // trip has no located entries yet. Uses the /route response from tctx.route.
 import { el } from '../dom.js';
-import { typeInfo } from '../format.js';
+import { typeInfo, entryIcon } from '../format.js';
 
 export function renderMap(tctx) {
   const route = tctx.route || { stops: [], legs: [], totalKm: 0 };
@@ -65,7 +65,7 @@ function initMap(mapDiv, route, stops) {
     const info = typeInfo(stop.type);
     L.marker(points[i], { icon: numberedIcon(L, i + 1, info.color) })
       .addTo(map)
-      .bindPopup(popupHtml(stop, info));
+      .bindPopup(popupHtml(stop, info, entryIcon(stop)));
   });
 
   // One polyline per measured leg, styled by mode (air = dashed blue, ground =
@@ -128,9 +128,9 @@ function kmLabel(L, km) {
 }
 
 // Built from server-provided fields; escape to keep the popup injection-safe.
-function popupHtml(stop, info) {
+function popupHtml(stop, info, icon) {
   const isAirport = stop.kind === 'airport' && stop.code;
-  const heading = isAirport ? `${info.icon} ${esc(stop.code)}` : `${info.icon} ${esc(stop.title)}`;
+  const heading = isAirport ? `${icon} ${esc(stop.code)}` : `${icon} ${esc(stop.title)}`;
   const sub = isAirport
     ? `${esc(info.label)} · ${esc(stop.date)}${stop.title ? ` · ${esc(stop.title)}` : ''}`
     : `${esc(info.label)} · ${esc(stop.date)}`;