Add long press for chat messages

src/lib/components/FieldInline.svelte

@@ -1,4 +1,4 @@
-<div class="grid grid-cols-2 gap-2 {$$props.class}">
+<div class="grid grid-cols-1 sm:grid-cols-2 gap-2 {$$props.class}">
   <label class="flex items-center gap-2 font-bold">
     <slot name="label" />
   </label>

src/lib/components/LongPress.svelte

@@ -0,0 +1,15 @@
+<script lang="ts">
+  export let onLongPress
+
+  const onTouchStart = () => {
+    timeout = setTimeout(onLongPress, 500)
+  }
+
+  const onTouchEnd = () => clearTimeout(timeout)
+
+  let timeout: number
+</script>
+
+<div on:touchstart={onTouchStart} on:touchend={onTouchEnd} {...$$props}>
+  <slot />
+</div>