refactor: reduce complexity in global pricing validation

Extract validation logic into separate functions to reduce:
- Cyclomatic complexity from 12 to acceptable levels
- Nesting depth from 3 to 2

Improves code maintainability and passes Credo checks.

lib/towerops_web/live/admin/org_live/index.ex

@@ -211,47 +211,52 @@ defmodule ToweropsWeb.Admin.OrgLive.Index do
   end
 
   defp validate_global_pricing_params(params) do
-    errors = []
+    []
+    |> validate_free_devices(params)
+    |> validate_price_per_device(params)
+  end
 
-    errors =
-      case Map.get(params, "default_free_devices") do
-        nil ->
-          errors
+  defp validate_free_devices(errors, params) do
+    case Map.get(params, "default_free_devices") do
+      nil -> errors
+      value -> validate_free_devices_value(errors, value)
+    end
+  end
 
-        value ->
-          case Integer.parse(value) do
-            {int, _} when int > 0 and int < 10_000 ->
-              errors
+  defp validate_free_devices_value(errors, value) do
+    case Integer.parse(value) do
+      {int, _} when int > 0 and int < 10_000 ->
+        errors
 
-            _ ->
-              [
-                {:default_free_devices, {"must be greater than 0 and less than 10,000", []}}
-                | errors
-              ]
-          end
-      end
+      _ ->
+        [{:default_free_devices, {"must be greater than 0 and less than 10,000", []}} | errors]
+    end
+  end
 
-    errors =
-      case Map.get(params, "default_price_per_device") do
-        nil ->
-          errors
+  defp validate_price_per_device(errors, params) do
+    case Map.get(params, "default_price_per_device") do
+      nil -> errors
+      value -> validate_price_per_device_value(errors, value)
+    end
+  end
 
-        value ->
-          case Decimal.parse(value) do
-            {decimal, _} ->
-              if Decimal.compare(decimal, "0.01") in [:gt, :eq] and
-                   Decimal.compare(decimal, "999.99") in [:lt, :eq] do
-                errors
-              else
-                [{:default_price_per_device, {"must be between 0.01 and 999.99", []}} | errors]
-              end
+  defp validate_price_per_device_value(errors, value) do
+    case Decimal.parse(value) do
+      {decimal, _} -> validate_price_range(errors, decimal)
+      :error -> [{:default_price_per_device, {"must be a valid decimal", []}} | errors]
+    end
+  end
 
-            :error ->
-              [{:default_price_per_device, {"must be a valid decimal", []}} | errors]
-          end
-      end
+  defp validate_price_range(errors, decimal) do
+    valid_range? =
+      Decimal.compare(decimal, "0.01") in [:gt, :eq] and
+        Decimal.compare(decimal, "999.99") in [:lt, :eq]
 
-    errors
+    if valid_range? do
+      errors
+    else
+      [{:default_price_per_device, {"must be between 0.01 and 999.99", []}} | errors]
+    end
   end
 
   defp count_active_subscriptions do

lib/towerops_web/live/admin/org_live/index.html.heex

@@ -4,8 +4,8 @@
       <h1 class="text-2xl font-bold text-gray-900 dark:text-white">{t("All Organizations")}</h1>
       <p class="text-gray-600 dark:text-gray-400">{t_admin("Manage organizations")}</p>
     </div>
-
-    <!-- Global Billing Defaults Card -->
+    
+<!-- Global Billing Defaults Card -->
     <div
       class="rounded-lg border border-slate-200 bg-white p-6 dark:border-slate-700 dark:bg-slate-800"
       data-test="global-defaults-card"