Add train headcode search

src/lib/components/ui/cards/HeadcodeSearchCard.svelte

@@ -0,0 +1,45 @@
+<script lang="ts">
+    import { goto } from '$app/navigation';
+	import BaseCard from '$lib/components/ui/cards/BaseCard.svelte';
+	import Textbox from '$lib/components/ui/Textbox.svelte';
+	import Button from '$lib/components/ui/Button.svelte';
+
+	let headcode = $state('');
+
+    function handleSearch(e: SubmitEvent) {
+        e.preventDefault();
+        if (!headcode.trim()) return;
+
+        const searchParams = new URLSearchParams();
+        searchParams.append('h', headcode.trim().toUpperCase());
+
+        goto(`/trains?${searchParams.toString()}`)
+    }
+</script>
+
+<BaseCard header={'Search Train & PIS'}>
+
+        <form onsubmit={handleSearch} class="card-content">
+		<Textbox 
+            placeholder="Enter Headcode"
+            bind:value={headcode}
+            maxLength={4}
+        />
+        <Button
+            type="submit"
+            disabled={!headcode}
+        >Search</Button>
+</form>
+</BaseCard>
+
+<style>
+	.card-content {
+		text-align: center;
+		width: 90%;
+		margin: auto;
+		padding: 10px 0 10px 0;
+        display: flex;
+        flex-direction: column;
+        gap: 0.75rem;
+	}
+</style>