Change beacon height_ft from float to integer

Height in feet doesn't need decimal precision. Migrates the DB
column, updates schema type, and strips trailing .0 from form
input so the integer cast succeeds.

lib/microwaveprop/beacons/beacon.ex

@@ -135,7 +135,7 @@ defmodule Microwaveprop.Beacons.Beacon do
     field :lat, :float
     field :lon, :float
     field :power_mw, :float
-    field :height_ft, :float
+    field :height_ft, :integer
     field :on_the_air, :boolean, default: true
     field :approved, :boolean, default: false
     field :keying, :string, default: "on_off"
@@ -190,7 +190,8 @@ defmodule Microwaveprop.Beacons.Beacon do
   defp round_coord(v), do: v
 
   defp round_int(nil), do: nil
-  defp round_int(v) when is_float(v), do: Float.round(v, 0)
+  defp round_int(v) when is_float(v), do: round(v)
+  defp round_int(v) when is_integer(v), do: v
   defp round_int(v), do: v
 
   # If grid is blank but lat/lon are valid, derive it.

lib/microwaveprop_web/live/beacon_live/form.ex

@@ -41,7 +41,6 @@ defmodule MicrowavepropWeb.BeaconLive.Form do
           field={@form[:height_ft]}
           type="number"
           label="Height above ground (ft)"
-          step="any"
           required
         />
         <.input
@@ -115,10 +114,15 @@ defmodule MicrowavepropWeb.BeaconLive.Form do
   end
 
   defp strip_commas(params) do
-    Map.update(params, "frequency_mhz", nil, fn
+    params
+    |> Map.update("frequency_mhz", nil, fn
       v when is_binary(v) -> String.replace(v, ",", "")
       v -> v
     end)
+    |> Map.update("height_ft", nil, fn
+      v when is_binary(v) -> v |> String.replace(~r/\.0*$/, "")
+      v -> v
+    end)
   end
 
   defp save_beacon(socket, :edit, beacon_params) do

lib/microwaveprop_web/live/beacon_live/index.ex

@@ -30,7 +30,7 @@ defmodule MicrowavepropWeb.BeaconLive.Index do
         <:col :let={{_id, beacon}} label="Lat">{beacon.lat}</:col>
         <:col :let={{_id, beacon}} label="Lon">{beacon.lon}</:col>
         <:col :let={{_id, beacon}} label="EIRP (mW)">{Beacon.format_mw(beacon.power_mw)}</:col>
-        <:col :let={{_id, beacon}} label="Height AGL (ft)">{if beacon.height_ft, do: round(beacon.height_ft)}</:col>
+        <:col :let={{_id, beacon}} label="Height AGL (ft)">{beacon.height_ft}</:col>
         <:col :let={{_id, beacon}} label="Keying">{Beacon.keying_label(beacon.keying)}</:col>
         <:col :let={{_id, beacon}} label="On air">
           <span class={["badge badge-sm", (beacon.on_the_air && "badge-success") || "badge-ghost"]}>
@@ -69,7 +69,7 @@ defmodule MicrowavepropWeb.BeaconLive.Index do
           <:col :let={{_id, beacon}} label="Call">{beacon.callsign}</:col>
           <:col :let={{_id, beacon}} label="Grid">{beacon.grid}</:col>
           <:col :let={{_id, beacon}} label="EIRP (mW)">{Beacon.format_mw(beacon.power_mw)}</:col>
-          <:col :let={{_id, beacon}} label="Height AGL (ft)">{if beacon.height_ft, do: round(beacon.height_ft)}</:col>
+          <:col :let={{_id, beacon}} label="Height AGL (ft)">{beacon.height_ft}</:col>
           <:col :let={{_id, beacon}} label="Submitted">
             {Calendar.strftime(beacon.inserted_at, "%Y-%m-%d %H:%M UTC")}
           </:col>

lib/microwaveprop_web/live/beacon_live/show.ex

@@ -118,7 +118,7 @@ defmodule MicrowavepropWeb.BeaconLive.Show do
           <.stat_field label="Longitude">{format_coord(@beacon.lon)}</.stat_field>
           <.stat_field label="EIRP">{Beacon.format_mw(@beacon.power_mw)} mW</.stat_field>
 
-          <.stat_field label="Height AGL">{if @beacon.height_ft, do: round(@beacon.height_ft)} ft</.stat_field>
+          <.stat_field label="Height AGL">{@beacon.height_ft} ft</.stat_field>
           <.stat_field label="Bearing">{bearing_label(@beacon.bearing)}</.stat_field>
           <.stat_field :if={@beacon.beamwidth_deg} label="Beamwidth">
             {Beacon.format_mw(@beacon.beamwidth_deg)}°

priv/repo/migrations/20260411144239_change_beacon_height_ft_to_integer.exs

@@ -0,0 +1,9 @@
+defmodule Microwaveprop.Repo.Migrations.ChangeBeaconHeightFtToInteger do
+  use Ecto.Migration
+
+  def change do
+    alter table(:beacons) do
+      modify :height_ft, :integer, from: :float
+    end
+  end
+end

test/microwaveprop/beacons/range_estimate_test.exs

@@ -13,7 +13,7 @@ defmodule Microwaveprop.Beacons.RangeEstimateTest do
       lat: 32.897,
       lon: -97.038,
       power_mw: 10_000.0,
-      height_ft: 100.0,
+      height_ft: 100,
       on_the_air: true
     }
 

test/support/fixtures/beacons_fixtures.ex

@@ -12,7 +12,7 @@ defmodule Microwaveprop.BeaconsFixtures do
       lat: 32.897,
       lon: -97.038,
       power_mw: 10_000.0,
-      height_ft: 100.0
+      height_ft: 100
     })
   end