feat(navi/ui): wire place.category from osm key:value at all place-creation sites

Populate place.category = osm_key:osm_value (else null) where geocoder results
become routable places, so Auto mode can take the type-hint fast path instead of
the spatial /locate probe:
- LocationInput.selectResult (direct setRouteStart/End)
- SearchBar.setSelectedPlace (preview -> PlaceCard -> startDirections) + pending addStop
- DirectionsPanel.handleDragEnd now preserves category through origin/dest reconstruction

Coord-only pins (radial menu, GPS, dropped pins) and basemap-label features carry no
osm_key:value, so category is null and Auto falls back to the spatial check. setRouteStart/
setRouteEnd store places wholesale (category preserved); startDirections already preserves it.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

frontend/src/components/DirectionsPanel.jsx

@@ -166,6 +166,7 @@ export default function DirectionsPanel({ onClose }) {
       lon: newOriginItem.data.lon,
       name: newOriginItem.data.name,
       source: newOriginItem.data.source,
+      category: newOriginItem.data?.category ?? null,
     } : null
 
     const newDest = newDestItem?.data ? {
@@ -173,6 +174,7 @@ export default function DirectionsPanel({ onClose }) {
       lon: newDestItem.data.lon,
       name: newDestItem.data.name,
       source: newDestItem.data.source,
+      category: newDestItem.data?.category ?? null,
     } : null
 
     const newStops = newStopItems.map((item) => ({

frontend/src/components/LocationInput.jsx

@@ -167,6 +167,8 @@ export default function LocationInput({
       name: result.name,
       source: result.source,
       matchCode: result.match_code,
+      // OSM key:value hint for Auto mode's type-hint fast path (null -> spatial fallback)
+      category: (result.raw?.osm_key && result.raw?.osm_value) ? `${result.raw.osm_key}:${result.raw.osm_value}` : null,
     })
     setQuery(result.name)
     setResults([])

frontend/src/components/SearchBar.jsx

@@ -194,7 +194,7 @@ const SearchBar = forwardRef(function SearchBar(_, ref) {
     }
 
     if (pending) {
-      addStop({ lat: result.lat, lon: result.lon, name: result.name, source: result.source, matchCode: result.match_code })
+      addStop({ lat: result.lat, lon: result.lon, name: result.name, source: result.source, matchCode: result.match_code, category: (result.raw?.osm_key && result.raw?.osm_value) ? `${result.raw.osm_key}:${result.raw.osm_value}` : null })
       addStop({ lat: pending.lat, lon: pending.lon, name: pending.name, source: pending.source, matchCode: pending.matchCode })
       clearPendingDestination()
       toast(`Routing from ${result.name} to ${pending.name}`, { icon: '\u{1F9ED}' })
@@ -208,6 +208,8 @@ const SearchBar = forwardRef(function SearchBar(_, ref) {
         source: result.source,
         matchCode: result.match_code,
         raw: result.raw || {},
+        // OSM key:value hint for Auto mode (null -> spatial fallback)
+        category: (result.raw?.osm_key && result.raw?.osm_value) ? `${result.raw.osm_key}:${result.raw.osm_value}` : null,
       })
       // Set click marker for two-click model consistency
       setClickMarker({