fix(map): address review round 2 — precision circles, traceroute, i18n

- Fix precision circle radius: use zoom-based exponential interpolation
  to convert meters to pixels instead of treating meters as dp values
- Fix InlineMap precision circle: compute pixel radius from meters at
  the fixed zoom-15 display level
- Fix TracerouteLayers: wrap callback in LaunchedEffect to avoid state
  updates during composition; add nodes to remember keys for fresh hop
  labels; use relatedNodeNums.size for accurate total count
- Fix compass bearing: use epsilon comparison (±0.5°) instead of
  exact float equality to prevent flickering near north
- Localize EditWaypointDialog: replace hardcoded English strings with
  stringResource() using existing waypoint_edit/waypoint_new resources
- Format coordinates to 6 decimal places in waypoint position display

core/resources/src/commonMain/composeResources/values/strings.xml

@@ -362,6 +362,7 @@
     <string name="waypoint_edit">Edit waypoint</string>
     <string name="waypoint_delete">Delete waypoint?</string>
     <string name="waypoint_new">New waypoint</string>
+    <string name="waypoint_lock_to_my_node">Lock to my node</string>
     <string name="waypoint_received">Received waypoint: %1$s</string>
     <string name="error_duty_cycle">Duty Cycle limit reached. Cannot send messages right now, please try again later.</string>
     <string name="remove">Remove</string>