feat(dashboard): mobile layout, glass UI, context bottom nav + OIDC PKCE (#1079)

* feat(dashboard): mobile layout, glass tiles, plain-text countdown, place photos

- Rework the mobile dashboard: cover hero, separate boarding-pass card,
  trimmed atlas (trips + days only), stacked widgets
- New floating bottom tab bar with a centred context-aware + button
  (new trip / place / journey / entry depending on the page)
- Move profile + notifications into a small top strip on the dashboard
- Desktop: glassmorphic tiles (light + dark), neutral dark palette,
  plain-text countdown module, real place photos in the boarding pass

* i18n(dashboard): translate new dashboard keys across all locales

Fill the dashboard-rework keys (hero, atlas, fx, tz, upcoming, copy
dialog, aria labels, countdown) that were left as English placeholders,
plus the new startsIn/aria keys, for all 19 languages.

* feat(oidc): send PKCE (S256) in the OIDC login flow

The OIDC client now generates a code_verifier per login, sends the
S256 code_challenge on the authorize request and the code_verifier on
the token exchange. Works whether the provider has PKCE optional or
required (fixes login against providers that require PKCE, e.g. Pocket ID).

shared/src/i18n/en/dashboard.ts

@@ -135,6 +135,8 @@ const dashboard: TranslationStrings = {
   'dashboard.hero.dayLeft': 'Day left',
   'dashboard.hero.daysLeft': 'Days left',
   'dashboard.hero.lastDay': 'Last day',
+  'dashboard.hero.untilStart': 'Until start',
+  'dashboard.hero.startsIn': 'Trip starts in',
   'dashboard.atlas.countriesVisited': 'Atlas · Countries visited',
   'dashboard.atlas.ofTotal': 'of {total}',
   'dashboard.atlas.tripsTotal': 'Trips total',
@@ -154,5 +156,12 @@ const dashboard: TranslationStrings = {
   'dashboard.tz.empty': 'No other timezones yet — add one with +',
   'dashboard.upcoming.title': 'Upcoming reservations',
   'dashboard.upcoming.empty': 'Nothing booked yet.',
+  'dashboard.aria.toggleView': 'Toggle view',
+  'dashboard.aria.filter': 'Filter',
+  'dashboard.aria.duplicate': 'Duplicate',
+  'dashboard.aria.refreshRates': 'Refresh rates',
+  'dashboard.aria.swapCurrencies': 'Swap currencies',
+  'dashboard.aria.addTimezone': 'Add timezone',
+  'dashboard.aria.removeTimezone': 'Remove {city}',
 };
 export default dashboard;