feat(manacore/web): add unified context menu system for workbench and app pages

Adds right-click context menus to workbench cards, minimized tabs, PillNavigation,
and item-level context menus for todo, calendar, contacts, habits, notes, places,
and moodlit modules. Uses a shared builder pattern with app-specific actions
registered via AppDescriptor.contextMenuActions.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

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

@@ -474,7 +474,12 @@
 			<!-- Navigation Items -->
 			{#each items as item}
 				{#if item.onClick}
-					<button onclick={item.onClick} class="pill glass-pill" class:active={item.active}>
+					<button
+						onclick={item.onClick}
+						oncontextmenu={item.onContextMenu}
+						class="pill glass-pill"
+						class:active={item.active}
+					>
 						{#if item.icon}
 							{#if item.icon === 'mana'}
 								<svg class="pill-icon" viewBox="0 0 24 24" fill="currentColor">
@@ -492,7 +497,12 @@
 						<span class="pill-label">{item.label}</span>
 					</button>
 				{:else}
-					<a href={item.href} class="pill glass-pill" class:active={isActive(item.href)}>
+					<a
+						href={item.href}
+						oncontextmenu={item.onContextMenu}
+						class="pill glass-pill"
+						class:active={isActive(item.href)}
+					>
 						{#if item.icon}
 							{#if item.icon === 'mana'}
 								<svg class="pill-icon" viewBox="0 0 24 24" fill="currentColor">

packages/shared-ui/src/navigation/types.ts

@@ -24,6 +24,8 @@ export interface PillNavItem {
 	onClick?: () => void;
 	/** Whether this item is currently active/selected (for toggle buttons) */
 	active?: boolean;
+	/** Right-click handler for context menu */
+	onContextMenu?: (e: MouseEvent) => void;
 }
 
 export interface PillDropdownItem {