feat(map): two-click selection model with precise center dot

Replaces 'every click selects something' with a deliberate two-click
flow:
- First click drops marker (existing circle plus new precise center dot)
  and opens place panel
- Second click INSIDE the marker circle opens the radial menu
- Second click OUTSIDE the circle deselects without selecting the new
  spot — requires another click to select

The 4px filled center dot at exact click coordinates gives precise
visual feedback for GPS-coord readout. The existing circle's radius
defines the same-spot tolerance, visually showing the radial-trigger
hit area.

Right-click radial unchanged. Search-dropdown selection drops a marker
for consistency.

src/components/SearchBar.jsx

@@ -50,6 +50,7 @@ const SearchBar = forwardRef(function SearchBar(_, ref) {
   const setAutocompleteOpen = useStore((s) => s.setAutocompleteOpen)
   const addStop = useStore((s) => s.addStop)
   const setSelectedPlace = useStore((s) => s.setSelectedPlace)
+  const setClickMarker = useStore((s) => s.setClickMarker)
   const setEditingContact = useStore((s) => s.setEditingContact)
   const clearPendingDestination = useStore((s) => s.clearPendingDestination)
   const mapCenter = useStore((s) => s.mapCenter)
@@ -165,6 +166,12 @@ const SearchBar = forwardRef(function SearchBar(_, ref) {
         matchCode: result.match_code,
         raw: result.raw || {},
       })
+      // Set click marker for two-click model consistency
+      setClickMarker({
+        lat: result.lat,
+        lon: result.lon,
+        circleRadiusPx: 14, // matches preview marker size
+      })
     }
 
     setQuery('')