Custom icons, improved GPS, history layout, address fixes

- Replace placeholder SVG icons with custom PNG icons (80x80 padded)
- AffineTransform for pixel-perfect icon centering in menu ring
- Colored circles behind icons with icon drawn at 60% size
- GPS: always wait full timeout (30s), keep best quality fix
- History: show address, PLZ+city, coordinates on separate lines
- Geocoding: fall back to "name" field for street-level results,
  include PLZ+city in cached address data
- Address distance threshold raised to 70m

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

source/GpsService.mc

@@ -47,17 +47,16 @@ class GpsService {
         if (info == null || info.position == null) { return; }
 
         var degrees = info.position.toDegrees();
-        var acc = (info.accuracy != null) ? info.accuracy : null;
+        var quality = (info.accuracy != null) ? info.accuracy : 0;
 
-        _bestFix = {
-            "lat" => degrees[0].toFloat(),
-            "lon" => degrees[1].toFloat(),
-            "acc" => (acc != null) ? acc.toFloat() : null
-        };
-
-        // Good enough → stop early.
-        if (acc != null && acc <= Config.GPS_TARGET_ACCURACY_M) {
-            _finish(_bestFix);
+        // Always keep the best quality fix.
+        if (_bestFix == null || quality >= (_bestFix["q"] as Number)) {
+            _bestFix = {
+                "lat" => degrees[0].toFloat(),
+                "lon" => degrees[1].toFloat(),
+                "acc" => quality.toFloat(),
+                "q"   => quality
+            };
         }
     }