fix: per-event delete button, Docker network default, polling interval duration parsing

- Add per-event delete button (trash icon on hover) in event log entries
- Set Docker network default to 'docker-watcher' in DB schema + migration for existing DBs
- Parse Go duration strings (5m, 1h) to seconds in settings UI, convert back on save
- Clear error when network is empty in deployer instead of hidden fallback

web/src/routes/events/+page.svelte

@@ -5,7 +5,7 @@
 <script lang="ts">
 	import { onMount, onDestroy } from 'svelte';
 	import { t } from '$lib/i18n';
-	import { fetchEventLog, fetchEventLogStats, clearAllEvents } from '$lib/api';
+	import { fetchEventLog, fetchEventLogStats, clearAllEvents, deleteEvent } from '$lib/api';
 	import ConfirmDialog from '$lib/components/ConfirmDialog.svelte';
 	import { toasts } from '$lib/stores/toast';
 	import { connectGlobalEvents, type SSEConnection, type EventLogSSEPayload } from '$lib/sse';
@@ -275,6 +275,15 @@
 				<EventLogEntryComponent
 					{entry}
 					isNew={newEventIds.has(entry.id)}
+					ondelete={async (id) => {
+						try {
+							await deleteEvent(id);
+							events = events.filter(e => e.id !== id);
+							stats = { ...stats, total: Math.max(0, stats.total - 1) };
+						} catch (err) {
+							toasts.error(err instanceof Error ? err.message : 'Failed to delete event');
+						}
+					}}
 				/>
 			{/each}
 		</div>