refactor(frontend): timezone-safe date handling with London-aware utilities

Introduce getLondonTodayCalendarDate(), parseWallClockDate(), and formatLocalDateTime() for reliable Europe/London timezone handling. Replace ad-hoc SvelteDate/new Date() usage with these utilities across all components and stores.

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
This commit is contained in:
2026-06-24 23:43:58 +01:00
co-authored by Sisyphus
parent e4b9003439
commit 4ac7768070
32 changed files with 618 additions and 515 deletions
@@ -1,9 +1,10 @@
<script lang="ts">
import { authStore } from '$lib/stores/auth.svelte';
import { SvelteDate } from 'svelte/reactivity';
import { toast } from 'svelte-sonner';
import { formatDuration } from '$lib/utils/format';
import { formatUserName } from '$lib/utils/nameDisplay';
import { authStore } from '$lib/stores/auth.svelte';
import { SvelteDate } from 'svelte/reactivity';
import { toast } from 'svelte-sonner';
import { formatDuration } from '$lib/utils/format';
import { formatUserName } from '$lib/utils/nameDisplay';
import { parseWallClockDate } from '$lib/utils/timeSlots';
import * as Modal from '$lib/components/ui/dialog';
import * as AlertDialog from '$lib/components/ui/alert-dialog';
import { Button } from '$lib/components/ui/button';
@@ -437,7 +438,7 @@
<div class="text-xs text-gray-500">Time</div>
<div class="font-medium">
{(() => {
const date = new SvelteDate(booking.start_time);
const date = parseWallClockDate(booking.start_time);
return date.toLocaleTimeString('en-US', {
hour: 'numeric',
minute: '2-digit',