fix(i18n): translate hardcoded strings in JourneyDetailPage and fix ellipsis in all languages

- Replace all remaining hardcoded strings in JourneyDetailPage JourneySettingsDialog with t() calls
- Add 14 missing translation keys to all 13 non-English language files
  (trips.member*, common.expand/collapse, inspector.remove, memories.*, journey.*)
- Fix common.loading and common.saving to use Unicode ellipsis (…) instead of three dots (...)
- Update 4 test files that expected three-dot ellipsis to use Unicode ellipsis
- All 2541 tests passing

client/src/components/Planner/DayDetailPanel.tsx

@@ -189,7 +189,7 @@ export default function DayDetailPanel({ day, days, places, categories = [], tri
             </div>
             {!collapsed && formattedDate && <div style={{ fontSize: 12, color: 'var(--text-muted)', marginTop: 1 }}>{formattedDate}</div>}
           </div>
-          <button onClick={(e) => { e.stopPropagation(); toggleCollapse() }} title={collapsed ? 'Expand' : 'Collapse'}
+          <button onClick={(e) => { e.stopPropagation(); toggleCollapse() }} title={collapsed ? t('common.expand') : t('common.collapse')}
             style={{ background: 'var(--bg-secondary)', border: 'none', borderRadius: 10, width: 32, height: 32, display: 'flex', alignItems: 'center', justifyContent: 'center', cursor: 'pointer', flexShrink: 0, transition: 'all 0.15s ease' }}
             onMouseEnter={e => e.currentTarget.style.background = 'var(--bg-hover)'}
             onMouseLeave={e => e.currentTarget.style.background = 'var(--bg-secondary)'}>