feat(dashboard): complete frontend redesign for Issue #271

- +layout.svelte: Upload button in header (authenticated users only)
- +page.server.ts: call /api/dashboard/resume, /pulse, /activity;
  remove deprecated /api/documents/incomplete and /recent-activity
- +page.svelte: 2-col grid layout (main + 320px sidebar), greeting,
  DashboardFamilyPulse + DashboardActivityFeed in sidebar
- DashboardResumeStrip: refactored to use server data (resumeDoc prop),
  SVG thumbnail, progress bar with aria-*, empty state, CTA
- DashboardFamilyPulse: new component — weekly stats from audit_log
- DashboardActivityFeed: new component — activity feed with "für dich" badge
- Update specs for new data shapes

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/lib/components/DashboardActivityFeed.svelte

@@ -0,0 +1,81 @@
+<script lang="ts">
+import * as m from '$lib/paraglide/messages.js';
+import type { ActivityFeedItemDTO } from '$lib/generated/api';
+
+interface Props {
+	feed: ActivityFeedItemDTO[];
+}
+
+const { feed }: Props = $props();
+
+const verbMap: Record<string, string> = {
+	TEXT_SAVED: m.audit_action_text_saved(),
+	FILE_UPLOADED: m.audit_action_file_uploaded(),
+	ANNOTATION_CREATED: m.audit_action_annotation_created(),
+	COMMENT_ADDED: m.audit_action_comment_added(),
+	MENTION_CREATED: m.audit_action_mention_created()
+};
+
+function verb(kind: string): string {
+	return verbMap[kind] ?? kind;
+}
+
+function formatDate(iso: string): string {
+	return new Intl.DateTimeFormat('de-DE', {
+		day: 'numeric',
+		month: 'short',
+		year: 'numeric'
+	}).format(new Date(iso));
+}
+</script>
+
+<section class="rounded-sm border border-line bg-surface p-5">
+	<div class="mb-3 flex items-center justify-between">
+		<h2 class="font-sans text-xs font-bold tracking-widest text-ink-3 uppercase">
+			{m.feed_caption()}
+		</h2>
+		<a href="/documents" class="font-sans text-xs text-ink-3 transition-colors hover:text-ink"
+			>Alle →</a
+		>
+	</div>
+
+	{#if feed.length > 0}
+		<ul class="flex flex-col gap-3">
+			{#each feed as item (item.happenedAt + item.documentId + item.kind)}
+				<li class="flex items-start gap-3">
+					{#if item.actor}
+						<span
+							class="mt-0.5 inline-flex h-9 w-9 shrink-0 items-center justify-center rounded-full font-sans text-sm font-bold text-white"
+							style="background:{item.actor.color}">{item.actor.initials}</span
+						>
+					{:else}
+						<span
+							class="mt-0.5 inline-flex h-9 w-9 shrink-0 items-center justify-center rounded-full bg-line font-sans text-sm text-ink-3"
+							>?</span
+						>
+					{/if}
+
+					<div class="min-w-0 flex-1">
+						<p class="font-sans text-sm leading-snug text-ink">
+							{#if item.actor}
+								<strong>{item.actor.name ?? item.actor.initials}</strong>
+							{/if}
+							{verb(item.kind)}
+							<a href="/documents/{item.documentId}" class="underline hover:text-accent">
+								{item.documentTitle}
+							</a>
+							{#if item.youMentioned}
+								<span
+									class="ml-1.5 inline-block rounded-full border border-accent px-2 py-px font-sans text-[10px] font-bold text-accent"
+								>
+									{m.feed_for_you()}
+								</span>
+							{/if}
+						</p>
+						<p class="mt-0.5 font-sans text-xs text-ink-3">{formatDate(item.happenedAt)}</p>
+					</div>
+				</li>
+			{/each}
+		</ul>
+	{/if}
+</section>