feat(manacore/web): add share via uLoad to todo, cards, and chat

Adds ShareNetwork button and ShareModal to:
- Todo: task detail expanded view
- Cards: deck header actions
- Chat: conversation header (between pin and delete)

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

apps/manacore/apps/web/src/routes/(app)/cards/decks/[id]/+page.svelte

@@ -6,11 +6,16 @@
 	import { cardStore } from '$lib/modules/cards/stores/cards.svelte';
 	import { useDeck, useCardsByDeck } from '$lib/modules/cards/queries';
 	import type { Deck, Card } from '$lib/modules/cards/types';
-	import { ArrowLeft, Trash, Plus } from '@manacore/shared-icons';
+	import { ArrowLeft, Trash, Plus, ShareNetwork } from '@manacore/shared-icons';
+	import { ShareModal } from '@manacore/shared-uload';
 
 	let deckId = $derived($page.params.id);
 	let showDeleteConfirm = $state(false);
 	let deleting = $state(false);
+	let showShare = $state(false);
+	let shareUrl = $derived(
+		`${typeof window !== 'undefined' ? window.location.origin : ''}/cards/decks/${deckId}`
+	);
 
 	// New card form
 	let showNewCardForm = $state(false);
@@ -87,6 +92,13 @@
 						Offentlich
 					</span>
 				{/if}
+				<button
+					onclick={() => (showShare = true)}
+					class="rounded-lg border border-border p-2 text-muted-foreground transition-colors hover:bg-muted hover:text-foreground"
+					title="Kurzlink teilen"
+				>
+					<ShareNetwork size={16} />
+				</button>
 				<button
 					class="rounded-lg border border-destructive/30 p-2 text-destructive transition-colors hover:bg-destructive/10"
 					onclick={() => (showDeleteConfirm = true)}
@@ -276,3 +288,13 @@
 		</button>
 	</div>
 {/if}
+
+<!-- Share Modal (uLoad integration) -->
+<ShareModal
+	visible={showShare}
+	onClose={() => (showShare = false)}
+	url={shareUrl}
+	title={deck?.title ?? ''}
+	source="cards"
+	description={deck?.description ?? ''}
+/>

apps/manacore/apps/web/src/routes/(app)/chat/[id]/+page.svelte

@@ -14,7 +14,9 @@
 		PencilSimple,
 		Check,
 		X,
+		ShareNetwork,
 	} from '@manacore/shared-icons';
+	import { ShareModal } from '@manacore/shared-uload';
 
 	const conversationsCtx: { readonly value: Conversation[] } = getContext('conversations');
 
@@ -29,6 +31,10 @@
 	let isSending = $state(false);
 	let isEditingTitle = $state(false);
 	let editTitle = $state('');
+	let showShare = $state(false);
+	let shareUrl = $derived(
+		`${typeof window !== 'undefined' ? window.location.origin : ''}/chat/${conversationId}`
+	);
 
 	async function handleSend() {
 		const text = inputText.trim();
@@ -153,6 +159,13 @@
 			>
 				<PushPin size={18} weight={conversation?.isPinned ? 'fill' : 'regular'} />
 			</button>
+			<button
+				onclick={() => (showShare = true)}
+				class="rounded-lg p-1.5 text-[hsl(var(--muted-foreground))] hover:text-[hsl(var(--foreground))]"
+				title="Kurzlink teilen"
+			>
+				<ShareNetwork size={18} />
+			</button>
 			<button
 				onclick={handleDelete}
 				class="rounded-lg p-1.5 text-[hsl(var(--muted-foreground))] hover:text-red-500"
@@ -214,3 +227,12 @@
 		</div>
 	</div>
 </div>
+
+<!-- Share Modal (uLoad integration) -->
+<ShareModal
+	visible={showShare}
+	onClose={() => (showShare = false)}
+	url={shareUrl}
+	title={conversation?.title ?? 'Chat'}
+	source="chat"
+/>

apps/manacore/apps/web/src/routes/(app)/todo/+page.svelte

@@ -39,7 +39,9 @@
 		CaretRight,
 		Folder,
 		CheckCircle,
+		ShareNetwork,
 	} from '@manacore/shared-icons';
+	import { ShareModal } from '@manacore/shared-uload';
 
 	// Get data from layout context
 	const allTasks$: Observable<Task[]> = getContext('tasks');
@@ -105,6 +107,14 @@
 		return sortTasks(tasks, viewStore.sortBy, viewStore.sortOrder);
 	});
 
+	// Share modal state
+	let shareTask = $state<Task | null>(null);
+	let shareUrl = $derived(
+		shareTask
+			? `${typeof window !== 'undefined' ? window.location.origin : ''}/todo?task=${shareTask.id}`
+			: ''
+	);
+
 	// Quick add task
 	let newTaskTitle = $state('');
 	let isAdding = $state(false);
@@ -455,6 +465,16 @@
 											})}
 										class="rounded-md border border-border bg-background px-2 py-1 text-xs focus:border-primary focus:outline-none"
 									/>
+									<button
+										onclick={(e) => {
+											e.stopPropagation();
+											shareTask = task;
+										}}
+										class="rounded-md px-2 py-1 text-xs text-muted-foreground transition-colors hover:bg-muted"
+										title="Kurzlink teilen"
+									>
+										<ShareNetwork size={14} />
+									</button>
 									<button
 										onclick={(e) => handleDeleteTask(e, task)}
 										class="ml-auto rounded-md px-2 py-1 text-xs text-red-500 transition-colors hover:bg-red-500/10"
@@ -533,6 +553,16 @@
 	{/if}
 </div>
 
+<!-- Share Modal (uLoad integration) -->
+<ShareModal
+	visible={shareTask !== null}
+	onClose={() => (shareTask = null)}
+	url={shareUrl}
+	title={shareTask?.title ?? ''}
+	source="todo"
+	description={shareTask?.description ?? ''}
+/>
+
 <style>
 	/* DnD: tag hovering over task item */
 	:global(.mana-drop-target-hover) {