started to implement updates on transactions

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

frontend/src/routes/accounting/transaction.svelte

@@ -0,0 +1,49 @@
+<script>
+	import LineEditor from '../../Components/LineEditor.svelte';
+	import { api, patch } from '../../urls.svelte';
+	import { error, yikes } from '../../warn.svelte';
+	let { account, transaction, users } = $props();
+
+	async function update(changes){
+		let url = api('accounting/transaction/'+transaction.id);
+		let res = await patch(url,changes);
+		if (res.ok){
+			yikes();
+			return true;
+		}
+		error(res);
+		return false;
+	}
+
+	async function setDate(newDate){
+		return await update({date:newDate});
+	}
+</script>
+
+<tr>
+	<td>
+		<LineEditor type="date" wrapper="span" editable="true" value={transaction.date} onSet={setDate} />
+	</td>
+	{#each Object.entries(users) as [id,user]}
+	<td class="amount">
+		{#if id == transaction.source.id}
+		{(-transaction.amount).toFixed(2)}&nbsp;{account.currency}
+		{/if}
+		{#if id == transaction.destination.id}
+		{(+transaction.amount).toFixed(2)}&nbsp;{account.currency}
+		{/if}
+	</td>
+	{/each}
+	<td class="party">
+		{#if !transaction.source.id}
+		← {transaction.source.value}
+		{/if}
+		{#if !transaction.destination.id}
+		→ {transaction.destination.value}
+		{/if}
+	</td>
+	<td class="purpose">{transaction.purpose}</td>
+	<td class="tags">
+		{transaction.tags.join(', ')}
+	</td>
+</tr>