feat: Add basic event settings management page

This commit introduces a new page at /events/[event_id]/settings that allows users to view and edit the JSON configuration fields for an event. The page provides textareas for each config field and a 'Save' button to persist the changes.

src/routes/events/[event_id]/settings/+page.svelte

@@ -0,0 +1,110 @@
+<script lang="ts">
+	import { page } from '$app/stores';
+	import { liveQuery } from 'dexie';
+	import { db_events } from '$lib/ae_events/db_events';
+	import { onMount } from 'svelte';
+	import { events_func } from '$lib/ae_events_functions';
+	import { ae_api } from '$lib/stores/ae_stores';
+
+	let event_id = $page.params.event_id;
+	let event_obj = $state(null);
+
+	onMount(() => {
+		const observable = liveQuery(() => db_events.event.get(event_id));
+		const subscription = observable.subscribe((value) => {
+			event_obj = value;
+		});
+
+		return () => {
+			subscription.unsubscribe();
+		};
+	});
+
+	async function handle_save(field_name: string, json_string: string) {
+		try {
+			const parsed_json = JSON.parse(json_string);
+			const data_kv = { [field_name]: parsed_json };
+
+			await events_func.update_ae_obj__event({
+				api_cfg: $ae_api,
+				event_id: event_id,
+				data_kv: data_kv
+			});
+
+			alert('Settings saved successfully!');
+		} catch (error) {
+			console.error('Error saving settings:', error);
+			alert('Failed to save settings. Please check if the JSON is valid.');
+		}
+	}
+</script>
+
+<h1 class="h1">Event Settings</h1>
+
+{#if event_obj}
+	<div class="space-y-4">
+		<div>
+			<h2 class="h2">General Config (cfg_json)</h2>
+			<textarea class="textarea w-full h-64" bind:value={event_obj.cfg_json}></textarea>
+			<button
+				class="btn preset-tonal-primary"
+				on:click={() => handle_save('cfg_json', event_obj.cfg_json)}>Save</button
+			>
+		</div>
+
+		<div>
+			<h2 class="h2">Presentation Management (mod_pres_mgmt_json)</h2>
+			<textarea
+				class="textarea w-full h-64"
+				bind:value={event_obj.mod_pres_mgmt_json}></textarea>
+			<button
+				class="btn preset-tonal-primary"
+				on:click={() => handle_save('mod_pres_mgmt_json', event_obj.mod_pres_mgmt_json)}
+				>Save</button
+			>
+		</div>
+
+		<div>
+			<h2 class="h2">Badges (mod_badges_json)</h2>
+			<textarea class="textarea w-full h-64" bind:value={event_obj.mod_badges_json}></textarea>
+			<button
+				class="btn preset-tonal-primary"
+				on:click={() => handle_save('mod_badges_json', event_obj.mod_badges_json)}>Save</button
+			>
+		</div>
+
+		<div>
+			<h2 class="h2">Abstracts (mod_abstracts_json)</h2>
+			<textarea
+				class="textarea w-full h-64"
+				bind:value={event_obj.mod_abstracts_json}></textarea>
+			<button
+				class="btn preset-tonal-primary"
+				on:click={() => handle_save('mod_abstracts_json', event_obj.mod_abstracts_json)}
+				>Save</button
+			>
+		</div>
+
+		<div>
+			<h2 class="h2">Exhibits (mod_exhibits_json)</h2>
+			<textarea class="textarea w-full h-64" bind:value={event_obj.mod_exhibits_json}></textarea>
+			<button
+				class="btn preset-tonal-primary"
+				on:click={() => handle_save('mod_exhibits_json', event_obj.mod_exhibits_json)}
+				>Save</button
+			>
+		</div>
+
+		<div>
+			<h2 class="h2">Meetings (mod_meetings_json)</h2>
+			<textarea class="textarea w-full h-64" bind:value={event_obj.mod_meetings_json}></textarea>
+			<button
+				class="btn preset-tonal-primary"
+				on:click={() => handle_save('mod_meetings_json', event_obj.mod_meetings_json)}
+				>Save</button
+			>
+		</div>
+	</div>
+{:else}
+	<p>Loading event data...</p>
+{/if}