feat(calendar): add number labels to ViewSwitcher and extended day views

- Replace icons with number labels (1, 3, 5, 7, 10, 14, 30, 60, 90, 365, M, Y, L)
- Add new standard view types: 30day, 60day, 90day, 365day
- Add 3day view as standard option
- Add custom day range input (1-365 days) in context menu
- Update PillTabGroup to show labels when no icon is provided
- Change MultiDayView dayCount prop from union to number type
- Add ultra-compact class for views with 14+ days

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

packages/shared-ui/src/navigation/PillTabGroup.svelte

@@ -101,7 +101,7 @@
 						</svg>
 					{/if}
 				{/if}
-				{#if option.label && isSidebarMode}
+				{#if option.label}
 					<span class="tab-label">{option.label}</span>
 				{/if}
 			</button>