diff --git a/apps/manacore/apps/web/src/lib/components/observatory/ui/CompareView.svelte b/apps/manacore/apps/web/src/lib/components/observatory/ui/CompareView.svelte
new file mode 100644
index 000000000..476e445e3
--- /dev/null
+++ b/apps/manacore/apps/web/src/lib/components/observatory/ui/CompareView.svelte
@@ -0,0 +1,359 @@
+<script lang="ts">
+	import type { AppData, CategoryScores } from '../data/types';
+	import RadarChart from './RadarChart.svelte';
+
+	let { apps }: { apps: AppData[] } = $props();
+
+	let selected = $state<string[]>([]);
+
+	const colors = ['#3b82f6', '#f59e0b', '#10b981', '#ef4444'];
+
+	const statusColors: Record<string, string> = {
+		mature: '#34d399',
+		production: '#60a5fa',
+		beta: '#fbbf24',
+		alpha: '#f97316',
+	};
+
+	function toggle(id: string) {
+		if (selected.includes(id)) {
+			selected = selected.filter((s) => s !== id);
+		} else if (selected.length < 4) {
+			selected = [...selected, id];
+		}
+	}
+
+	let selectedApps = $derived(selected.map((id) => apps.find((a) => a.id === id)!).filter(Boolean));
+
+	const categoryKeys: (keyof CategoryScores)[] = [
+		'backend',
+		'frontend',
+		'database',
+		'testing',
+		'deployment',
+		'documentation',
+		'security',
+		'ux',
+	];
+
+	const labels = [
+		{ key: 'backend', label: 'Backend' },
+		{ key: 'frontend', label: 'Frontend' },
+		{ key: 'database', label: 'Database' },
+		{ key: 'testing', label: 'Testing' },
+		{ key: 'deployment', label: 'Deploy' },
+		{ key: 'documentation', label: 'Docs' },
+		{ key: 'security', label: 'Security' },
+		{ key: 'ux', label: 'UX' },
+	] as const;
+
+	const size = 280;
+	let center = $derived(size / 2);
+	let maxR = $derived(size / 2 - 30);
+
+	function polarToXY(angle: number, radius: number) {
+		const rad = ((angle - 90) * Math.PI) / 180;
+		return { x: center + Math.cos(rad) * radius, y: center + Math.sin(rad) * radius };
+	}
+
+	let rings = $derived(
+		[0.25, 0.5, 0.75, 1].map((pct) => {
+			const r = maxR * pct;
+			return labels
+				.map((_, i) => {
+					const angle = (360 / labels.length) * i;
+					return polarToXY(angle, r);
+				})
+				.map((p) => `${p.x},${p.y}`)
+				.join(' ');
+		})
+	);
+
+	let axes = $derived(labels.map((_, i) => polarToXY((360 / labels.length) * i, maxR)));
+
+	let labelPositions = $derived(
+		labels.map((l, i) => {
+			const pos = polarToXY((360 / labels.length) * i, maxR + 20);
+			return { ...pos, label: l.label };
+		})
+	);
+
+	function appPolygon(app: AppData): string {
+		return labels
+			.map((l, i) => {
+				const angle = (360 / labels.length) * i;
+				const value = app.categories[l.key] / 100;
+				const p = polarToXY(angle, maxR * value);
+				return `${p.x},${p.y}`;
+			})
+			.join(' ');
+	}
+</script>
+
+<div class="compare-view">
+	<!-- App selector -->
+	<div class="selector">
+		<p class="selector-label">Apps auswahlen (max. 4):</p>
+		<div class="selector-chips">
+			{#each apps as app (app.id)}
+				<button
+					type="button"
+					class="chip"
+					class:active={selected.includes(app.id)}
+					style={selected.includes(app.id)
+						? `border-color: ${colors[selected.indexOf(app.id)]}; color: ${colors[selected.indexOf(app.id)]}`
+						: ''}
+					onclick={() => toggle(app.id)}
+				>
+					<span class="chip-dot" style="background: {statusColors[app.status]}"></span>
+					{app.displayName}
+					<span class="chip-score">{app.score}</span>
+				</button>
+			{/each}
+		</div>
+	</div>
+
+	{#if selectedApps.length >= 2}
+		<div class="compare-content">
+			<!-- Overlaid radar chart -->
+			<div class="radar-section">
+				<svg width={size} height={size} viewBox="0 0 {size} {size}">
+					{#each rings as ring}
+						<polygon
+							points={ring}
+							fill="none"
+							stroke="rgba(148, 163, 184, 0.12)"
+							stroke-width="0.5"
+						/>
+					{/each}
+					{#each axes as axis}
+						<line
+							x1={center}
+							y1={center}
+							x2={axis.x}
+							y2={axis.y}
+							stroke="rgba(148, 163, 184, 0.08)"
+							stroke-width="0.5"
+						/>
+					{/each}
+
+					{#each selectedApps as app, i (app.id)}
+						<polygon
+							points={appPolygon(app)}
+							fill="{colors[i]}20"
+							stroke={colors[i]}
+							stroke-width="2"
+							opacity="0.8"
+						/>
+					{/each}
+
+					{#each labelPositions as lp}
+						<text
+							x={lp.x}
+							y={lp.y}
+							text-anchor="middle"
+							dominant-baseline="central"
+							font-size="9"
+							font-family="system-ui, sans-serif"
+							fill="#94a3b8"
+						>
+							{lp.label}
+						</text>
+					{/each}
+				</svg>
+
+				<!-- Legend -->
+				<div class="radar-legend">
+					{#each selectedApps as app, i (app.id)}
+						<span class="legend-item">
+							<span class="legend-color" style="background: {colors[i]}"></span>
+							{app.displayName} ({app.score})
+						</span>
+					{/each}
+				</div>
+			</div>
+
+			<!-- Category comparison bars -->
+			<div class="bars-section">
+				{#each categoryKeys as cat}
+					<div class="bar-group">
+						<span class="bar-label">{cat}</span>
+						<div class="bar-rows">
+							{#each selectedApps as app, i (app.id)}
+								<div class="bar-row">
+									<div class="bar-track">
+										<div
+											class="bar-fill"
+											style="width: {app.categories[cat]}%; background: {colors[i]}"
+										></div>
+									</div>
+									<span class="bar-value">{app.categories[cat]}</span>
+								</div>
+							{/each}
+						</div>
+					</div>
+				{/each}
+			</div>
+		</div>
+	{:else}
+		<div class="compare-placeholder">
+			<p>Wahle mindestens 2 Apps zum Vergleichen</p>
+		</div>
+	{/if}
+</div>
+
+<style>
+	.compare-view {
+		display: flex;
+		flex-direction: column;
+		gap: 24px;
+	}
+
+	.selector-label {
+		font-size: 12px;
+		color: #94a3b8;
+		margin: 0 0 10px 0;
+	}
+
+	.selector-chips {
+		display: flex;
+		flex-wrap: wrap;
+		gap: 6px;
+	}
+
+	.chip {
+		display: inline-flex;
+		align-items: center;
+		gap: 5px;
+		padding: 5px 10px;
+		border-radius: 16px;
+		border: 1px solid rgba(148, 163, 184, 0.15);
+		background: rgba(15, 23, 42, 0.4);
+		color: #94a3b8;
+		font-size: 12px;
+		cursor: pointer;
+		transition: all 0.15s;
+	}
+
+	.chip:hover {
+		border-color: rgba(148, 163, 184, 0.3);
+		color: #cbd5e1;
+	}
+
+	.chip.active {
+		background: rgba(59, 130, 246, 0.1);
+	}
+
+	.chip-dot {
+		width: 6px;
+		height: 6px;
+		border-radius: 50%;
+	}
+
+	.chip-score {
+		font-weight: 600;
+		font-variant-numeric: tabular-nums;
+	}
+
+	.compare-content {
+		display: grid;
+		grid-template-columns: auto 1fr;
+		gap: 32px;
+		align-items: start;
+	}
+
+	@media (max-width: 768px) {
+		.compare-content {
+			grid-template-columns: 1fr;
+		}
+	}
+
+	.radar-section {
+		display: flex;
+		flex-direction: column;
+		align-items: center;
+		gap: 12px;
+	}
+
+	.radar-legend {
+		display: flex;
+		flex-wrap: wrap;
+		gap: 12px;
+		justify-content: center;
+	}
+
+	.legend-item {
+		display: flex;
+		align-items: center;
+		gap: 5px;
+		font-size: 11px;
+		color: #cbd5e1;
+	}
+
+	.legend-color {
+		width: 10px;
+		height: 10px;
+		border-radius: 3px;
+	}
+
+	.bars-section {
+		display: flex;
+		flex-direction: column;
+		gap: 12px;
+	}
+
+	.bar-group {
+		display: flex;
+		flex-direction: column;
+		gap: 4px;
+	}
+
+	.bar-label {
+		font-size: 10px;
+		color: #64748b;
+		text-transform: capitalize;
+		font-weight: 600;
+	}
+
+	.bar-rows {
+		display: flex;
+		flex-direction: column;
+		gap: 3px;
+	}
+
+	.bar-row {
+		display: flex;
+		align-items: center;
+		gap: 8px;
+	}
+
+	.bar-track {
+		flex: 1;
+		height: 6px;
+		background: rgba(148, 163, 184, 0.08);
+		border-radius: 3px;
+		overflow: hidden;
+	}
+
+	.bar-fill {
+		height: 100%;
+		border-radius: 3px;
+		transition: width 0.4s ease;
+	}
+
+	.bar-value {
+		font-size: 10px;
+		color: #94a3b8;
+		width: 22px;
+		text-align: right;
+		font-variant-numeric: tabular-nums;
+		font-weight: 600;
+	}
+
+	.compare-placeholder {
+		text-align: center;
+		padding: 48px 0;
+		color: #64748b;
+		font-size: 14px;
+	}
+</style>
diff --git a/apps/manacore/apps/web/src/lib/components/observatory/ui/Leaderboard.svelte b/apps/manacore/apps/web/src/lib/components/observatory/ui/Leaderboard.svelte
new file mode 100644
index 000000000..e879e2c3f
--- /dev/null
+++ b/apps/manacore/apps/web/src/lib/components/observatory/ui/Leaderboard.svelte
@@ -0,0 +1,295 @@
+<script lang="ts">
+	import type { AppData, CategoryScores } from '../data/types';
+
+	let { apps, onselect }: { apps: AppData[]; onselect: (app: AppData) => void } = $props();
+
+	type SortKey = 'score' | 'name' | 'trend' | keyof CategoryScores;
+	let sortKey = $state<SortKey>('score');
+	let sortAsc = $state(false);
+
+	const categoryKeys: (keyof CategoryScores)[] = [
+		'backend',
+		'frontend',
+		'database',
+		'testing',
+		'deployment',
+		'documentation',
+		'security',
+		'ux',
+	];
+
+	const shortLabels: Record<string, string> = {
+		backend: 'BE',
+		frontend: 'FE',
+		database: 'DB',
+		testing: 'Test',
+		deployment: 'Deploy',
+		documentation: 'Docs',
+		security: 'Sec',
+		ux: 'UX',
+	};
+
+	const statusColors: Record<string, string> = {
+		mature: '#34d399',
+		production: '#60a5fa',
+		beta: '#fbbf24',
+		alpha: '#f97316',
+		prototype: '#94a3b8',
+	};
+
+	function scoreColor(score: number): string {
+		if (score >= 85) return '#34d399';
+		if (score >= 70) return '#60a5fa';
+		if (score >= 50) return '#fbbf24';
+		if (score >= 30) return '#f97316';
+		return '#ef4444';
+	}
+
+	function toggleSort(key: SortKey) {
+		if (sortKey === key) {
+			sortAsc = !sortAsc;
+		} else {
+			sortKey = key;
+			sortAsc = false;
+		}
+	}
+
+	let sorted = $derived(() => {
+		const arr = [...apps];
+		arr.sort((a, b) => {
+			let va: number | string, vb: number | string;
+			if (sortKey === 'score') {
+				va = a.score;
+				vb = b.score;
+			} else if (sortKey === 'name') {
+				va = a.displayName.toLowerCase();
+				vb = b.displayName.toLowerCase();
+			} else if (sortKey === 'trend') {
+				va = a.trend;
+				vb = b.trend;
+			} else {
+				va = a.categories[sortKey];
+				vb = b.categories[sortKey];
+			}
+			if (va < vb) return sortAsc ? -1 : 1;
+			if (va > vb) return sortAsc ? 1 : -1;
+			return 0;
+		});
+		return arr;
+	});
+
+	function sortIndicator(key: SortKey): string {
+		if (sortKey !== key) return '';
+		return sortAsc ? ' ↑' : ' ↓';
+	}
+</script>
+
+<div class="leaderboard">
+	<div class="table-scroll">
+		<table>
+			<thead>
+				<tr>
+					<th class="rank-col">#</th>
+					<th class="name-col sortable" onclick={() => toggleSort('name')}>
+						App{sortIndicator('name')}
+					</th>
+					<th class="score-col sortable" onclick={() => toggleSort('score')}>
+						Score{sortIndicator('score')}
+					</th>
+					<th class="trend-col sortable" onclick={() => toggleSort('trend')}>
+						Trend{sortIndicator('trend')}
+					</th>
+					{#each categoryKeys as cat}
+						<th class="cat-col sortable" onclick={() => toggleSort(cat)}>
+							{shortLabels[cat]}{sortIndicator(cat)}
+						</th>
+					{/each}
+				</tr>
+			</thead>
+			<tbody>
+				{#each sorted() as app, i (app.id)}
+					<tr class="app-row" onclick={() => onselect(app)}>
+						<td class="rank">{i + 1}</td>
+						<td class="name-cell">
+							<span class="status-dot" style="background: {statusColors[app.status]}"></span>
+							{app.displayName}
+						</td>
+						<td class="score-cell" style="color: {scoreColor(app.score)}">
+							{app.score}
+						</td>
+						<td class="trend-cell">
+							{#if app.trend > 0}
+								<span class="trend-up">+{app.trend}</span>
+							{:else if app.trend < 0}
+								<span class="trend-down">{app.trend}</span>
+							{:else}
+								<span class="trend-neutral">-</span>
+							{/if}
+						</td>
+						{#each categoryKeys as cat}
+							<td class="cat-cell">
+								<div class="cat-bar-wrap">
+									<div
+										class="cat-bar-fill"
+										style="width: {app.categories[cat]}%; background: {scoreColor(
+											app.categories[cat]
+										)}"
+									></div>
+								</div>
+								<span class="cat-value">{app.categories[cat]}</span>
+							</td>
+						{/each}
+					</tr>
+				{/each}
+			</tbody>
+		</table>
+	</div>
+</div>
+
+<style>
+	.leaderboard {
+		width: 100%;
+	}
+
+	.table-scroll {
+		overflow-x: auto;
+		-webkit-overflow-scrolling: touch;
+	}
+
+	table {
+		width: 100%;
+		border-collapse: collapse;
+		min-width: 800px;
+	}
+
+	thead tr {
+		border-bottom: 1px solid rgba(148, 163, 184, 0.1);
+	}
+
+	th {
+		font-size: 10px;
+		font-weight: 600;
+		color: #64748b;
+		text-transform: uppercase;
+		letter-spacing: 0.06em;
+		padding: 8px 6px;
+		text-align: left;
+		white-space: nowrap;
+		user-select: none;
+	}
+
+	th.sortable {
+		cursor: pointer;
+	}
+
+	th.sortable:hover {
+		color: #94a3b8;
+	}
+
+	.rank-col {
+		width: 32px;
+		text-align: center;
+	}
+	.name-col {
+		width: 120px;
+	}
+	.score-col {
+		width: 56px;
+		text-align: right;
+	}
+	.trend-col {
+		width: 48px;
+		text-align: right;
+	}
+	.cat-col {
+		width: 70px;
+		text-align: right;
+	}
+
+	.app-row {
+		border-bottom: 1px solid rgba(148, 163, 184, 0.05);
+		cursor: pointer;
+		transition: background 0.15s;
+	}
+
+	.app-row:hover {
+		background: rgba(59, 130, 246, 0.06);
+	}
+
+	td {
+		padding: 8px 6px;
+		font-size: 12px;
+		color: #cbd5e1;
+	}
+
+	.rank {
+		text-align: center;
+		color: #64748b;
+		font-weight: 600;
+		font-size: 11px;
+	}
+
+	.name-cell {
+		display: flex;
+		align-items: center;
+		gap: 6px;
+		font-weight: 500;
+		color: #f1f5f9;
+	}
+
+	.status-dot {
+		width: 6px;
+		height: 6px;
+		border-radius: 50%;
+		flex-shrink: 0;
+	}
+
+	.score-cell {
+		text-align: right;
+		font-weight: 700;
+		font-size: 14px;
+		font-variant-numeric: tabular-nums;
+	}
+
+	.trend-cell {
+		text-align: right;
+		font-size: 11px;
+		font-weight: 600;
+	}
+
+	.trend-up {
+		color: #34d399;
+	}
+	.trend-down {
+		color: #ef4444;
+	}
+	.trend-neutral {
+		color: #475569;
+	}
+
+	.cat-cell {
+		text-align: right;
+	}
+
+	.cat-bar-wrap {
+		display: inline-block;
+		width: 32px;
+		height: 4px;
+		background: rgba(148, 163, 184, 0.1);
+		border-radius: 2px;
+		overflow: hidden;
+		vertical-align: middle;
+		margin-right: 4px;
+	}
+
+	.cat-bar-fill {
+		height: 100%;
+		border-radius: 2px;
+	}
+
+	.cat-value {
+		font-size: 10px;
+		font-variant-numeric: tabular-nums;
+		color: #94a3b8;
+	}
+</style>
diff --git a/apps/manacore/apps/web/src/lib/components/observatory/ui/RiverCard.svelte b/apps/manacore/apps/web/src/lib/components/observatory/ui/RiverCard.svelte
new file mode 100644
index 000000000..ddbf16770
--- /dev/null
+++ b/apps/manacore/apps/web/src/lib/components/observatory/ui/RiverCard.svelte
@@ -0,0 +1,158 @@
+<script lang="ts">
+	import type { RiverData } from '../data/types';
+	import { LAKES } from '../data/layout';
+	import { water } from '../data/colors';
+
+	let { river }: { river: RiverData } = $props();
+
+	function lakeName(id: string): string {
+		const lake = LAKES.find((l) => l.id === id);
+		return lake?.label || id;
+	}
+
+	let fromLabel = $derived(river.from === 'source' ? 'User Requests' : lakeName(river.from));
+	let toLabel = $derived(lakeName(river.to));
+	let speedLabel = $derived(
+		river.flowSpeed >= 0.8 ? 'Schnell' : river.flowSpeed >= 0.5 ? 'Mittel' : 'Ruhig'
+	);
+	let speedColor = $derived(
+		river.flowSpeed >= 0.8 ? '#34d399' : river.flowSpeed >= 0.5 ? '#fbbf24' : '#60a5fa'
+	);
+</script>
+
+<div class="river-card">
+	<!-- SVG preview -->
+	<div class="river-preview">
+		<svg width="240" height="60" viewBox="0 0 240 60" xmlns="http://www.w3.org/2000/svg">
+			<!-- River line -->
+			<path
+				d="M20,30 Q80,15 120,30 Q160,45 220,30"
+				fill="none"
+				stroke={water.river}
+				stroke-width={river.width * 0.8}
+				stroke-linecap="round"
+				opacity="0.7"
+			/>
+			<!-- Flow particles -->
+			<path
+				d="M20,30 Q80,15 120,30 Q160,45 220,30"
+				fill="none"
+				stroke={water.highlight}
+				stroke-width={river.width * 0.3}
+				stroke-linecap="round"
+				stroke-dasharray="8 16"
+				opacity="0.5"
+			>
+				<animate
+					attributeName="stroke-dashoffset"
+					values="24;0"
+					dur="{2 + (1 - river.flowSpeed) * 3}s"
+					repeatCount="indefinite"
+				/>
+			</path>
+			<!-- Endpoints -->
+			<circle cx="20" cy="30" r="4" fill={water.deep} />
+			<circle cx="220" cy="30" r="4" fill={water.deep} />
+			<!-- Arrow -->
+			<path
+				d="M210,26 L220,30 L210,34"
+				fill="none"
+				stroke={water.highlight}
+				stroke-width="1.5"
+				opacity="0.6"
+			/>
+		</svg>
+	</div>
+
+	<div class="river-info">
+		<div class="river-flow">
+			<span class="river-from">{fromLabel}</span>
+			<span class="river-arrow">→</span>
+			<span class="river-to">{toLabel}</span>
+		</div>
+		<div class="river-stats">
+			<span class="river-stat">
+				<span class="stat-label">Geschwindigkeit</span>
+				<span class="stat-value" style="color: {speedColor}">{speedLabel}</span>
+			</span>
+			<span class="river-stat">
+				<span class="stat-label">Breite</span>
+				<span class="stat-value">{river.width}px</span>
+			</span>
+		</div>
+	</div>
+</div>
+
+<style>
+	.river-card {
+		flex-shrink: 0;
+		width: 260px;
+		background: rgba(15, 23, 42, 0.6);
+		backdrop-filter: blur(8px);
+		border: 1px solid rgba(148, 163, 184, 0.1);
+		border-radius: 12px;
+		overflow: hidden;
+		transition:
+			transform 0.2s,
+			border-color 0.2s;
+	}
+
+	.river-card:hover {
+		transform: translateY(-3px);
+		border-color: rgba(59, 130, 246, 0.2);
+	}
+
+	.river-preview {
+		display: flex;
+		justify-content: center;
+		background: linear-gradient(180deg, #1e293b 0%, #0f172a 100%);
+		padding: 8px 0;
+	}
+
+	.river-info {
+		padding: 12px 14px;
+	}
+
+	.river-flow {
+		display: flex;
+		align-items: center;
+		gap: 8px;
+		margin-bottom: 10px;
+	}
+
+	.river-from,
+	.river-to {
+		font-size: 12px;
+		font-weight: 600;
+		color: #e2e8f0;
+	}
+
+	.river-arrow {
+		color: #60a5fa;
+		font-size: 14px;
+	}
+
+	.river-stats {
+		display: flex;
+		gap: 16px;
+	}
+
+	.river-stat {
+		display: flex;
+		flex-direction: column;
+		gap: 1px;
+	}
+
+	.stat-label {
+		font-size: 9px;
+		color: #64748b;
+		text-transform: uppercase;
+		letter-spacing: 0.05em;
+	}
+
+	.stat-value {
+		font-size: 12px;
+		font-weight: 600;
+		color: #cbd5e1;
+	}
+</style>
diff --git a/apps/manacore/apps/web/src/lib/components/observatory/ui/TrendsChart.svelte b/apps/manacore/apps/web/src/lib/components/observatory/ui/TrendsChart.svelte
new file mode 100644
index 000000000..fbb08f53a
--- /dev/null
+++ b/apps/manacore/apps/web/src/lib/components/observatory/ui/TrendsChart.svelte
@@ -0,0 +1,232 @@
+<script lang="ts">
+	import type { AppData } from '../data/types';
+
+	let { apps }: { apps: AppData[] } = $props();
+
+	// Build timeline data from apps that have trends (previousScore)
+	// For now we create 2 data points: "before" and "now"
+	const timePoints = ['Vorher', 'Aktuell'];
+
+	const statusColors: Record<string, string> = {
+		mature: '#34d399',
+		production: '#60a5fa',
+		beta: '#fbbf24',
+		alpha: '#f97316',
+		prototype: '#94a3b8',
+	};
+
+	// Chart dimensions
+	const width = 800;
+	const height = 400;
+	const padL = 50;
+	const padR = 30;
+	const padT = 20;
+	const padB = 40;
+	const chartW = width - padL - padR;
+	const chartH = height - padT - padB;
+
+	// Apps sorted by current score
+	let sorted = $derived(apps.toSorted((a, b) => b.score - a.score));
+
+	// Generate line path for each app
+	function appLine(app: AppData): { path: string; startY: number; endY: number } {
+		const prev = app.trend !== 0 ? app.score - app.trend : app.score;
+		const x0 = padL;
+		const x1 = padL + chartW;
+		const y0 = padT + chartH - (prev / 100) * chartH;
+		const y1 = padT + chartH - (app.score / 100) * chartH;
+		return {
+			path: `M${x0},${y0} L${x1},${y1}`,
+			startY: y0,
+			endY: y1,
+		};
+	}
+
+	// Grid lines
+	const gridLines = [0, 25, 50, 75, 100];
+
+	let hoveredApp = $state<string | null>(null);
+
+	let gainers = $derived(sorted.filter((a) => a.trend > 0).sort((a, b) => b.trend - a.trend));
+	let avgScore = $derived(Math.round(sorted.reduce((s, a) => s + a.score, 0) / sorted.length));
+</script>
+
+<div class="trends-chart">
+	<svg
+		viewBox="0 0 {width} {height}"
+		style="width: 100%; height: auto; max-height: 450px;"
+		xmlns="http://www.w3.org/2000/svg"
+	>
+		<!-- Grid -->
+		{#each gridLines as val}
+			{@const y = padT + chartH - (val / 100) * chartH}
+			<line
+				x1={padL}
+				y1={y}
+				x2={padL + chartW}
+				y2={y}
+				stroke="rgba(148, 163, 184, 0.08)"
+				stroke-width="0.5"
+			/>
+			<text
+				x={padL - 8}
+				{y}
+				text-anchor="end"
+				dominant-baseline="central"
+				font-size="9"
+				fill="#64748b"
+			>
+				{val}
+			</text>
+		{/each}
+
+		<!-- Time labels -->
+		<text x={padL} y={height - 10} text-anchor="start" font-size="10" fill="#64748b">
+			{timePoints[0]}
+		</text>
+		<text x={padL + chartW} y={height - 10} text-anchor="end" font-size="10" fill="#64748b">
+			{timePoints[1]}
+		</text>
+
+		<!-- Lines for each app -->
+		{#each sorted as app (app.id)}
+			{@const line = appLine(app)}
+			{@const isHovered = hoveredApp === app.id}
+			{@const color = statusColors[app.status] || '#94a3b8'}
+
+			<g opacity={hoveredApp && !isHovered ? 0.15 : 1} style="transition: opacity 0.2s;">
+				<!-- Line -->
+				<path
+					d={line.path}
+					fill="none"
+					stroke={color}
+					stroke-width={isHovered ? 3 : 1.5}
+					stroke-linecap="round"
+				/>
+
+				<!-- Start dot -->
+				<circle cx={padL} cy={line.startY} r={isHovered ? 4 : 2.5} fill={color} />
+
+				<!-- End dot -->
+				<circle cx={padL + chartW} cy={line.endY} r={isHovered ? 4 : 2.5} fill={color} />
+
+				<!-- Label at end -->
+				<text
+					x={padL + chartW + 6}
+					y={line.endY}
+					font-size={isHovered ? 11 : 9}
+					font-weight={isHovered ? 600 : 400}
+					fill={isHovered ? '#f1f5f9' : '#94a3b8'}
+					dominant-baseline="central"
+				>
+					{app.displayName}
+					{app.score}
+				</text>
+
+				<!-- Hover area (invisible wide line) -->
+				<path
+					d={line.path}
+					fill="none"
+					stroke="transparent"
+					stroke-width="12"
+					onmouseenter={() => (hoveredApp = app.id)}
+					onmouseleave={() => (hoveredApp = null)}
+					style="cursor: pointer;"
+				/>
+			</g>
+		{/each}
+
+		<!-- Trend annotation for apps with big changes -->
+		{#each sorted.filter((a) => Math.abs(a.trend) >= 10) as app (app.id)}
+			{@const line = appLine(app)}
+			{@const midX = padL + chartW * 0.5}
+			{@const midY = (line.startY + line.endY) / 2}
+			<text
+				x={midX}
+				y={midY - 8}
+				text-anchor="middle"
+				font-size="10"
+				font-weight="600"
+				fill={app.trend > 0 ? '#34d399' : '#ef4444'}
+				opacity={hoveredApp && hoveredApp !== app.id ? 0.15 : 0.7}
+			>
+				{app.trend > 0 ? '+' : ''}{app.trend}
+			</text>
+		{/each}
+	</svg>
+
+	<!-- Summary cards -->
+	<div class="trend-summary">
+		{#if gainers.length}
+			<div class="summary-card">
+				<span class="summary-label">Grosste Verbesserungen</span>
+				<div class="summary-items">
+					{#each gainers as app (app.id)}
+						<span class="summary-item gain">
+							{app.displayName} <strong>+{app.trend}</strong>
+						</span>
+					{/each}
+				</div>
+			</div>
+		{/if}
+
+		<div class="summary-card">
+			<span class="summary-label">Durchschnitt</span>
+			<span class="summary-value">{avgScore}</span>
+		</div>
+	</div>
+</div>
+
+<style>
+	.trends-chart {
+		display: flex;
+		flex-direction: column;
+		gap: 20px;
+	}
+
+	.trend-summary {
+		display: flex;
+		gap: 16px;
+		flex-wrap: wrap;
+	}
+
+	.summary-card {
+		background: rgba(15, 23, 42, 0.5);
+		border: 1px solid rgba(148, 163, 184, 0.08);
+		border-radius: 10px;
+		padding: 12px 16px;
+		display: flex;
+		flex-direction: column;
+		gap: 6px;
+	}
+
+	.summary-label {
+		font-size: 10px;
+		color: #64748b;
+		text-transform: uppercase;
+		letter-spacing: 0.06em;
+		font-weight: 600;
+	}
+
+	.summary-items {
+		display: flex;
+		flex-wrap: wrap;
+		gap: 8px;
+	}
+
+	.summary-item {
+		font-size: 12px;
+		color: #cbd5e1;
+	}
+
+	.summary-item.gain strong {
+		color: #34d399;
+	}
+
+	.summary-value {
+		font-size: 24px;
+		font-weight: 800;
+		color: #f1f5f9;
+		font-variant-numeric: tabular-nums;
+	}
+</style>
diff --git a/apps/manacore/apps/web/src/routes/(app)/observatory/+page.svelte b/apps/manacore/apps/web/src/routes/(app)/observatory/+page.svelte
index a48deeb69..72737f1de 100644
--- a/apps/manacore/apps/web/src/routes/(app)/observatory/+page.svelte
+++ b/apps/manacore/apps/web/src/routes/(app)/observatory/+page.svelte
@@ -2,17 +2,22 @@
 	import SeenplatteScene from '$lib/components/observatory/SeenplatteScene.svelte';
 	import PlantCard from '$lib/components/observatory/ui/PlantCard.svelte';
 	import LakeCard from '$lib/components/observatory/ui/LakeCard.svelte';
+	import RiverCard from '$lib/components/observatory/ui/RiverCard.svelte';
+	import Leaderboard from '$lib/components/observatory/ui/Leaderboard.svelte';
+	import CompareView from '$lib/components/observatory/ui/CompareView.svelte';
+	import TrendsChart from '$lib/components/observatory/ui/TrendsChart.svelte';
 	import DetailPanel from '$lib/components/observatory/ui/DetailPanel.svelte';
 	import { createMockEcosystem } from '$lib/components/observatory/data/mockData';
-	import { LAKES } from '$lib/components/observatory/data/layout';
+	import { LAKES, RIVERS } from '$lib/components/observatory/data/layout';
 	import type { AppData } from '$lib/components/observatory/data/types';
 
-	type Tab = 'scene' | 'plants' | 'lakes';
+	type Tab = 'scene' | 'plants' | 'lakes' | 'rivers' | 'leaderboard' | 'compare' | 'trends';
 	let activeTab = $state<Tab>('scene');
 	let selectedApp = $state<AppData | null>(null);
 
 	const apps = createMockEcosystem();
 	const lakes = LAKES;
+	const rivers = RIVERS;
 
 	// Sort apps by score descending for gallery
 	const sortedApps = apps.toSorted((a, b) => b.score - a.score);
@@ -27,6 +32,10 @@
 		{ id: 'scene', label: 'Seenplatte' },
 		{ id: 'plants', label: 'Pflanzen', count: apps.length },
 		{ id: 'lakes', label: 'Seen', count: lakes.length },
+		{ id: 'rivers', label: 'Flusse', count: rivers.length },
+		{ id: 'leaderboard', label: 'Rangliste' },
+		{ id: 'compare', label: 'Vergleich' },
+		{ id: 'trends', label: 'Trends' },
 	];
 </script>
 
@@ -133,6 +142,54 @@
 				{/each}
 			</div>
 		</div>
+	{:else if activeTab === 'rivers'}
+		<div class="gallery-section">
+			<div class="gallery-header">
+				<h2 class="gallery-title">Alle Flusse</h2>
+				<p class="gallery-subtitle">
+					Datenstrome zwischen den Seen — Geschwindigkeit und Breite zeigen den Durchsatz
+				</p>
+			</div>
+
+			<div class="gallery-scroll">
+				{#each rivers as river (river.id)}
+					<RiverCard {river} />
+				{/each}
+			</div>
+		</div>
+	{:else if activeTab === 'leaderboard'}
+		<div class="gallery-section">
+			<div class="gallery-header">
+				<h2 class="gallery-title">Rangliste</h2>
+				<p class="gallery-subtitle">
+					Alle Apps sortiert nach Score — klicke auf Spalten zum Sortieren, auf Zeilen fur Details
+				</p>
+			</div>
+
+			<Leaderboard apps={sortedApps} onselect={(app) => (selectedApp = app)} />
+		</div>
+	{:else if activeTab === 'compare'}
+		<div class="gallery-section">
+			<div class="gallery-header">
+				<h2 class="gallery-title">Vergleich</h2>
+				<p class="gallery-subtitle">
+					Wahle bis zu 4 Apps und vergleiche ihre Starken und Schwachen direkt
+				</p>
+			</div>
+
+			<CompareView {apps} />
+		</div>
+	{:else if activeTab === 'trends'}
+		<div class="gallery-section">
+			<div class="gallery-header">
+				<h2 class="gallery-title">Trends</h2>
+				<p class="gallery-subtitle">
+					Score-Entwicklung aller Apps uber die Zeit — hover uber eine Linie fur Details
+				</p>
+			</div>
+
+			<TrendsChart {apps} />
+		</div>
 	{/if}
 </div>