Fix some click propagation

src/lib/components/Button.svelte

@@ -1,3 +1,15 @@
-<button on:click|stopPropagation type="button" {...$$props} class="text-left {$$props.class}">
-  <slot />
-</button>
+<script lang="ts">
+  export let type: "button" | "submit" = "button"
+
+  $: className = `text-left ${$$props.class}`
+</script>
+
+{#if type === 'submit'}
+  <button {...$$props} {type} class={className}>
+    <slot />
+  </button>
+{:else}
+  <button on:click|stopPropagation|preventDefault {...$$props} {type} class={className}>
+    <slot />
+  </button>
+{/if}