Remove grid squares toggle from rover planner page

The rover page now shows only: station markers, band selector,
propagation heatmap, and URL sharing. Grid overlay remains on
the main /map page.

assets/js/rover_map_hook.js

@@ -1,13 +1,9 @@
-import { updateGridOverlay } from "./maidenhead_grid"
-
 export const RoverMap = {
   mounted() {
     this.stations = []
     this.stationMarkers = L.layerGroup()
     this.scoreOverlay = null
     this.gridLookup = new Map()
-    this.gridLayer = L.layerGroup()
-    this.gridVisible = true
 
     this.colorScale = [
       { min: 80, r: 0, g: 255, b: 163 },
@@ -30,8 +26,6 @@ export const RoverMap = {
 
     this.map = map
     this.stationMarkers.addTo(map)
-    this.gridLayer.addTo(map)
-    updateGridOverlay(map, this.gridLayer)
 
     // Render pre-loaded propagation scores
     const initialScores = JSON.parse(this.el.dataset.scores || "[]")
@@ -50,9 +44,6 @@ export const RoverMap = {
 
     map.on("moveend", () => {
       pushBounds()
-      if (this.gridVisible) {
-        updateGridOverlay(map, this.gridLayer)
-      }
     })
 
     this.handleEvent("update_scores", ({ scores }) => {
@@ -64,15 +55,6 @@ export const RoverMap = {
       this.renderStations()
     })
 
-    this.handleEvent("toggle_grid", ({ visible }) => {
-      this.gridVisible = visible
-      if (visible) {
-        this.gridLayer.addTo(map)
-        updateGridOverlay(map, this.gridLayer)
-      } else {
-        this.gridLayer.remove()
-      }
-    })
   },
 
   // --- Propagation score overlay (same as main map) ---

lib/microwaveprop_web/live/rover_live.ex

@@ -38,8 +38,7 @@ defmodule MicrowavepropWeb.RoverLive do
        resolving: false,
        url_loaded: false,
        initial_scores_json: Jason.encode!(initial_scores),
-       bounds: @initial_bounds,
-       grid_visible: true
+       bounds: @initial_bounds
      )}
   end
 
@@ -99,17 +98,6 @@ defmodule MicrowavepropWeb.RoverLive do
     {:noreply, push_url(socket)}
   end
 
-  def handle_event("toggle_grid", _params, socket) do
-    visible = !socket.assigns.grid_visible
-
-    socket =
-      socket
-      |> assign(:grid_visible, visible)
-      |> push_event("toggle_grid", %{visible: visible})
-
-    {:noreply, socket}
-  end
-
   def handle_event("map_bounds", bounds, socket) do
     scores = Propagation.latest_scores(socket.assigns.band, bounds)
 
@@ -224,16 +212,6 @@ defmodule MicrowavepropWeb.RoverLive do
           <% end %>
         </select>
 
-        <label class="flex items-center gap-2 cursor-pointer px-1">
-          <input
-            type="checkbox"
-            class="toggle toggle-sm toggle-primary"
-            checked={@grid_visible}
-            phx-click="toggle_grid"
-          />
-          <span class="text-sm">Grid squares</span>
-        </label>
-
         <form phx-submit="add_station" class="flex gap-1">
           <input
             type="text"