fix: remove extra left padding on cost field

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

templates/nostrmarket/components/shipping-zones.html

@@ -48,8 +48,8 @@
           label="Countries"
           v-model="zoneDialog.data.countries"
         ></q-select>
-        <div class="row q-col-gutter-sm">
+        <div class="row items-start">
-          <div class="col">
+          <div class="col q-mr-sm">
             <q-input
               filled
               dense