From c64b4d6ac95d86e55ddfbfb3aabbf59d38c2bff6 Mon Sep 17 00:00:00 2001
From: Till-JS <101404291+Till-JS@users.noreply.github.com>
Date: Thu, 29 Jan 2026 21:28:35 +0100
Subject: [PATCH] =?UTF-8?q?=E2=9C=A8=20feat(matrix-web):=20add=20VoIP/vide?=
 =?UTF-8?q?o=20call=20support?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

- Add VoIP types: CallState, CallType, CallDirection, SimpleCall, CallCallbacks
- Add VoIP state management to Matrix store with place/answer/reject/hangup methods
- Add mic/camera mute toggle functionality
- Create CallView component for active calls with video streams
- Create IncomingCallDialog component for incoming call notifications
- Enable call buttons in RoomHeader (DMs only)
- Integrate call components into chat page
---
 .../src/lib/components/call/CallView.svelte   | 203 +++++++++++
 .../components/call/IncomingCallDialog.svelte | 123 +++++++
 .../apps/web/src/lib/components/call/index.ts |   2 +
 .../src/lib/components/chat/RoomHeader.svelte |  27 +-
 .../apps/web/src/lib/matrix/store.svelte.ts   | 336 +++++++++++++++++-
 apps/matrix/apps/web/src/lib/matrix/types.ts  |  59 +++
 .../web/src/routes/(app)/chat/+page.svelte    |  42 +++
 7 files changed, 782 insertions(+), 10 deletions(-)
 create mode 100644 apps/matrix/apps/web/src/lib/components/call/CallView.svelte
 create mode 100644 apps/matrix/apps/web/src/lib/components/call/IncomingCallDialog.svelte
 create mode 100644 apps/matrix/apps/web/src/lib/components/call/index.ts

diff --git a/apps/matrix/apps/web/src/lib/components/call/CallView.svelte b/apps/matrix/apps/web/src/lib/components/call/CallView.svelte
new file mode 100644
index 000000000..c23e14ab9
--- /dev/null
+++ b/apps/matrix/apps/web/src/lib/components/call/CallView.svelte
@@ -0,0 +1,203 @@
+<script lang="ts">
+	import { matrixStore, type SimpleCall } from '$lib/matrix';
+	import {
+		PhoneDisconnect,
+		Microphone,
+		MicrophoneSlash,
+		VideoCamera,
+		VideoCameraSlash,
+		User,
+	} from '@manacore/shared-icons';
+	import { onDestroy } from 'svelte';
+
+	interface Props {
+		call: SimpleCall;
+		onHangup?: () => void;
+	}
+
+	let { call, onHangup }: Props = $props();
+
+	// Video refs need to work with bind:this - not reactive
+	let localVideoRef: HTMLVideoElement | undefined = $state();
+	let remoteVideoRef: HTMLVideoElement | undefined = $state();
+	let callDuration = $state(0);
+	let durationInterval: ReturnType<typeof setInterval> | null = null;
+
+	// Start duration timer when call connects
+	$effect(() => {
+		if (call.state === 'connected' && !durationInterval) {
+			durationInterval = setInterval(() => {
+				callDuration++;
+			}, 1000);
+		}
+	});
+
+	// Attach local stream to video element
+	$effect(() => {
+		if (localVideoRef && call.localStream) {
+			localVideoRef.srcObject = call.localStream;
+		}
+	});
+
+	// Attach remote stream to video element
+	$effect(() => {
+		if (remoteVideoRef && call.remoteStream) {
+			remoteVideoRef.srcObject = call.remoteStream;
+		}
+	});
+
+	onDestroy(() => {
+		if (durationInterval) {
+			clearInterval(durationInterval);
+		}
+	});
+
+	function formatDuration(seconds: number): string {
+		const mins = Math.floor(seconds / 60);
+		const secs = seconds % 60;
+		return `${mins.toString().padStart(2, '0')}:${secs.toString().padStart(2, '0')}`;
+	}
+
+	function handleMicToggle() {
+		matrixStore.toggleMicMute();
+	}
+
+	function handleCameraToggle() {
+		matrixStore.toggleCameraMute();
+	}
+
+	function handleHangup() {
+		matrixStore.hangupCall();
+		onHangup?.();
+	}
+
+	function getStateText(state: string): string {
+		switch (state) {
+			case 'invite_sent':
+				return 'Anrufen...';
+			case 'ringing':
+				return 'Klingelt...';
+			case 'connecting':
+				return 'Verbinden...';
+			case 'connected':
+				return formatDuration(callDuration);
+			case 'ended':
+				return 'Beendet';
+			default:
+				return 'Verbinden...';
+		}
+	}
+</script>
+
+<div class="fixed inset-0 z-[100] bg-zinc-900 flex flex-col">
+	<!-- Header -->
+	<div class="flex items-center justify-between p-4 bg-black/30">
+		<div class="flex items-center gap-3">
+			{#if call.opponentAvatar}
+				<img
+					src={call.opponentAvatar}
+					alt={call.opponentName}
+					class="w-10 h-10 rounded-full object-cover"
+				/>
+			{:else}
+				<div
+					class="w-10 h-10 rounded-full bg-gradient-to-br from-violet-500 to-purple-600 flex items-center justify-center"
+				>
+					<User class="w-5 h-5 text-white" />
+				</div>
+			{/if}
+			<div>
+				<p class="font-medium text-white">{call.opponentName || 'Unbekannt'}</p>
+				<p class="text-sm text-white/70">
+					{call.type === 'video' ? 'Videoanruf' : 'Sprachanruf'} · {getStateText(call.state)}
+				</p>
+			</div>
+		</div>
+	</div>
+
+	<!-- Video area -->
+	<div class="flex-1 relative">
+		{#if call.type === 'video'}
+			<!-- Remote video (full screen) -->
+			<!-- svelte-ignore a11y_media_has_caption -->
+			<video bind:this={remoteVideoRef} autoplay playsinline class="w-full h-full object-cover"
+			></video>
+
+			<!-- Local video (picture-in-picture) -->
+			<div
+				class="absolute bottom-24 right-4 w-32 h-48 rounded-xl overflow-hidden shadow-xl border-2 border-white/20"
+			>
+				<video
+					bind:this={localVideoRef}
+					autoplay
+					playsinline
+					muted
+					class="w-full h-full object-cover"
+				></video>
+			</div>
+		{:else}
+			<!-- Voice call - show avatar -->
+			<div class="flex flex-col items-center justify-center h-full">
+				{#if call.opponentAvatar}
+					<img
+						src={call.opponentAvatar}
+						alt={call.opponentName}
+						class="w-32 h-32 rounded-full object-cover mb-6 ring-4 ring-white/20"
+					/>
+				{:else}
+					<div
+						class="w-32 h-32 rounded-full bg-gradient-to-br from-violet-500 to-purple-600 flex items-center justify-center mb-6 ring-4 ring-white/20"
+					>
+						<User class="w-16 h-16 text-white" />
+					</div>
+				{/if}
+				<p class="text-2xl font-semibold text-white">{call.opponentName || 'Unbekannt'}</p>
+				<p class="text-lg text-white/70 mt-2">{getStateText(call.state)}</p>
+			</div>
+		{/if}
+	</div>
+
+	<!-- Controls -->
+	<div
+		class="flex items-center justify-center gap-6 p-8 bg-gradient-to-t from-black/50 to-transparent"
+	>
+		<!-- Mute mic -->
+		<button
+			class="w-14 h-14 rounded-full flex items-center justify-center transition-colors
+			       {call.isMicMuted ? 'bg-red-500 hover:bg-red-600' : 'bg-white/20 hover:bg-white/30'}"
+			onclick={handleMicToggle}
+			title={call.isMicMuted ? 'Mikrofon aktivieren' : 'Mikrofon stumm'}
+		>
+			{#if call.isMicMuted}
+				<MicrophoneSlash class="w-6 h-6 text-white" />
+			{:else}
+				<Microphone class="w-6 h-6 text-white" />
+			{/if}
+		</button>
+
+		<!-- Mute camera (video calls only) -->
+		{#if call.type === 'video'}
+			<button
+				class="w-14 h-14 rounded-full flex items-center justify-center transition-colors
+				       {call.isCameraMuted ? 'bg-red-500 hover:bg-red-600' : 'bg-white/20 hover:bg-white/30'}"
+				onclick={handleCameraToggle}
+				title={call.isCameraMuted ? 'Kamera aktivieren' : 'Kamera aus'}
+			>
+				{#if call.isCameraMuted}
+					<VideoCameraSlash class="w-6 h-6 text-white" />
+				{:else}
+					<VideoCamera class="w-6 h-6 text-white" />
+				{/if}
+			</button>
+		{/if}
+
+		<!-- Hang up -->
+		<button
+			class="w-16 h-16 rounded-full bg-red-500 hover:bg-red-600 flex items-center justify-center transition-colors"
+			onclick={handleHangup}
+			title="Auflegen"
+		>
+			<PhoneDisconnect class="w-7 h-7 text-white" />
+		</button>
+	</div>
+</div>
diff --git a/apps/matrix/apps/web/src/lib/components/call/IncomingCallDialog.svelte b/apps/matrix/apps/web/src/lib/components/call/IncomingCallDialog.svelte
new file mode 100644
index 000000000..ac21425c4
--- /dev/null
+++ b/apps/matrix/apps/web/src/lib/components/call/IncomingCallDialog.svelte
@@ -0,0 +1,123 @@
+<script lang="ts">
+	import { matrixStore, type SimpleCall } from '$lib/matrix';
+	import { Phone, PhoneDisconnect, VideoCamera, User } from '@manacore/shared-icons';
+
+	interface Props {
+		call: SimpleCall;
+		onAnswer?: () => void;
+		onReject?: () => void;
+	}
+
+	let { call, onAnswer, onReject }: Props = $props();
+
+	function handleAnswer() {
+		matrixStore.answerCall();
+		onAnswer?.();
+	}
+
+	function handleReject() {
+		matrixStore.rejectCall();
+		onReject?.();
+	}
+</script>
+
+<div class="fixed inset-0 z-[100] flex items-center justify-center bg-black/60 backdrop-blur-sm">
+	<div class="bg-zinc-900 rounded-3xl p-8 shadow-2xl max-w-sm w-full mx-4 animate-bounce-in">
+		<!-- Caller info -->
+		<div class="flex flex-col items-center text-center mb-8">
+			{#if call.opponentAvatar}
+				<img
+					src={call.opponentAvatar}
+					alt={call.opponentName}
+					class="w-24 h-24 rounded-full object-cover mb-4 ring-4 ring-violet-500/50 animate-pulse"
+				/>
+			{:else}
+				<div
+					class="w-24 h-24 rounded-full bg-gradient-to-br from-violet-500 to-purple-600 flex items-center justify-center mb-4 ring-4 ring-violet-500/50 animate-pulse"
+				>
+					<User class="w-12 h-12 text-white" />
+				</div>
+			{/if}
+			<p class="text-xl font-semibold text-white">{call.opponentName || 'Unbekannt'}</p>
+			<p class="text-white/70 mt-1">
+				{call.type === 'video' ? 'Eingehender Videoanruf' : 'Eingehender Sprachanruf'}
+			</p>
+		</div>
+
+		<!-- Call type indicator -->
+		<div class="flex items-center justify-center gap-2 mb-8">
+			{#if call.type === 'video'}
+				<VideoCamera class="w-5 h-5 text-violet-400" />
+				<span class="text-violet-400 text-sm">Video</span>
+			{:else}
+				<Phone class="w-5 h-5 text-green-400" />
+				<span class="text-green-400 text-sm">Audio</span>
+			{/if}
+		</div>
+
+		<!-- Action buttons -->
+		<div class="flex items-center justify-center gap-8">
+			<!-- Reject -->
+			<button
+				class="w-16 h-16 rounded-full bg-red-500 hover:bg-red-600 flex items-center justify-center transition-all hover:scale-110 shadow-lg shadow-red-500/30"
+				onclick={handleReject}
+				title="Ablehnen"
+			>
+				<PhoneDisconnect class="w-7 h-7 text-white" />
+			</button>
+
+			<!-- Answer -->
+			<button
+				class="w-16 h-16 rounded-full bg-green-500 hover:bg-green-600 flex items-center justify-center transition-all hover:scale-110 shadow-lg shadow-green-500/30 animate-ring"
+				onclick={handleAnswer}
+				title="Annehmen"
+			>
+				<Phone class="w-7 h-7 text-white" />
+			</button>
+		</div>
+	</div>
+</div>
+
+<style>
+	@keyframes bounce-in {
+		0% {
+			opacity: 0;
+			transform: scale(0.8);
+		}
+		50% {
+			transform: scale(1.05);
+		}
+		100% {
+			opacity: 1;
+			transform: scale(1);
+		}
+	}
+
+	@keyframes ring {
+		0%,
+		100% {
+			transform: scale(1);
+		}
+		10%,
+		30%,
+		50%,
+		70%,
+		90% {
+			transform: scale(1.1);
+		}
+		20%,
+		40%,
+		60%,
+		80% {
+			transform: scale(0.95);
+		}
+	}
+
+	.animate-bounce-in {
+		animation: bounce-in 0.4s ease-out;
+	}
+
+	.animate-ring {
+		animation: ring 2s ease-in-out infinite;
+	}
+</style>
diff --git a/apps/matrix/apps/web/src/lib/components/call/index.ts b/apps/matrix/apps/web/src/lib/components/call/index.ts
new file mode 100644
index 000000000..2245f06a3
--- /dev/null
+++ b/apps/matrix/apps/web/src/lib/components/call/index.ts
@@ -0,0 +1,2 @@
+export { default as CallView } from './CallView.svelte';
+export { default as IncomingCallDialog } from './IncomingCallDialog.svelte';
diff --git a/apps/matrix/apps/web/src/lib/components/chat/RoomHeader.svelte b/apps/matrix/apps/web/src/lib/components/chat/RoomHeader.svelte
index 0176cb838..d97ff5e83 100644
--- a/apps/matrix/apps/web/src/lib/components/chat/RoomHeader.svelte
+++ b/apps/matrix/apps/web/src/lib/components/chat/RoomHeader.svelte
@@ -16,9 +16,14 @@
 		onMenuClick?: () => void;
 		onInfoClick?: () => void;
 		onSearchClick?: () => void;
+		onVoiceCall?: () => void;
+		onVideoCall?: () => void;
 	}
 
-	let { onMenuClick, onInfoClick, onSearchClick }: Props = $props();
+	let { onMenuClick, onInfoClick, onSearchClick, onVoiceCall, onVideoCall }: Props = $props();
+
+	// Check if calls are possible (DMs only for now)
+	let canCall = $derived(matrixStore.currentSimpleRoom?.isDirect ?? false);
 
 	let room = $derived(matrixStore.currentSimpleRoom);
 	let cryptoReady = $derived(matrixStore.cryptoReady);
@@ -111,18 +116,22 @@
 				<MagnifyingGlass class="h-5 w-5 text-muted-foreground" />
 			</button>
 			<button
-				class="hidden sm:flex p-2.5 rounded-xl glass-button shadow-sm disabled:opacity-40"
-				title="Sprachanruf"
-				disabled
+				class="hidden sm:flex p-2.5 rounded-xl glass-button shadow-sm transition-colors
+				       {canCall ? 'hover:bg-green-500/10 hover:text-green-500' : 'opacity-40 cursor-not-allowed'}"
+				title={canCall ? 'Sprachanruf' : 'Anrufe nur in Direktnachrichten verfügbar'}
+				disabled={!canCall}
+				onclick={onVoiceCall}
 			>
-				<Phone class="h-5 w-5 text-muted-foreground" />
+				<Phone class="h-5 w-5" />
 			</button>
 			<button
-				class="hidden sm:flex p-2.5 rounded-xl glass-button shadow-sm disabled:opacity-40"
-				title="Videoanruf"
-				disabled
+				class="hidden sm:flex p-2.5 rounded-xl glass-button shadow-sm transition-colors
+				       {canCall ? 'hover:bg-violet-500/10 hover:text-violet-500' : 'opacity-40 cursor-not-allowed'}"
+				title={canCall ? 'Videoanruf' : 'Anrufe nur in Direktnachrichten verfügbar'}
+				disabled={!canCall}
+				onclick={onVideoCall}
 			>
-				<VideoCamera class="h-5 w-5 text-muted-foreground" />
+				<VideoCamera class="h-5 w-5" />
 			</button>
 			<button
 				class="p-2.5 rounded-xl glass-button shadow-sm"
diff --git a/apps/matrix/apps/web/src/lib/matrix/store.svelte.ts b/apps/matrix/apps/web/src/lib/matrix/store.svelte.ts
index 4ee45cc61..b88561639 100644
--- a/apps/matrix/apps/web/src/lib/matrix/store.svelte.ts
+++ b/apps/matrix/apps/web/src/lib/matrix/store.svelte.ts
@@ -1,6 +1,10 @@
 import { browser } from '$app/environment';
 import type { MatrixClient, Room, MatrixEvent, RoomMember as SDKRoomMember } from 'matrix-js-sdk';
-import { showMessageNotification, canShowNotifications, isDocumentFocused } from '$lib/notifications';
+import {
+	showMessageNotification,
+	canShowNotifications,
+	isDocumentFocused,
+} from '$lib/notifications';
 import type {
 	SyncState,
 	MatrixCredentials,
@@ -17,6 +21,11 @@ import type {
 	CrossSigningStatus,
 	PresenceState,
 	UserPresence,
+	SimpleCall,
+	CallCallbacks,
+	CallState as CallStateType,
+	CallType,
+	CallDirection,
 } from './types';
 
 const STORAGE_KEY = 'matrix_credentials';
@@ -46,6 +55,13 @@ class MatrixStore {
 	private _crossSigningReady = $state(false);
 	private _cryptoCallbacks: CryptoCallbacks = {};
 
+	// VoIP / Call State
+	private _activeCall = $state<SimpleCall | null>(null);
+	private _incomingCall = $state<SimpleCall | null>(null);
+	private _callCallbacks: CallCallbacks = {};
+	// eslint-disable-next-line @typescript-eslint/no-explicit-any
+	private _matrixCall: any = null; // The actual MatrixCall object
+
 	// ─────────────────────────────────────────────────────────
 	// Public Getters
 	// ─────────────────────────────────────────────────────────
@@ -82,6 +98,20 @@ class MatrixStore {
 		return this._crossSigningReady;
 	}
 
+	// VoIP Getters
+	get activeCall() {
+		return this._activeCall;
+	}
+	get incomingCall() {
+		return this._incomingCall;
+	}
+	get hasActiveCall() {
+		return this._activeCall !== null;
+	}
+	get hasIncomingCall() {
+		return this._incomingCall !== null;
+	}
+
 	/**
 	 * Get presence for a specific user
 	 */
@@ -331,6 +361,19 @@ class MatrixStore {
 				this._timeline = [...(room.getLiveTimeline().getEvents() || [])];
 			}
 		});
+
+		// Incoming calls
+		// CallEvent is exported from matrix-js-sdk, but CallState needs dynamic import from webrtc module
+		// eslint-disable-next-line @typescript-eslint/no-explicit-any
+		this._client.on('Call.incoming' as any, async (call: any) => {
+			console.log('Incoming call:', call.callId);
+			try {
+				const webrtc = await import('matrix-js-sdk/lib/webrtc/call');
+				this.handleIncomingCall(call, webrtc.CallEvent, webrtc.CallState);
+			} catch (err) {
+				console.error('Error handling incoming call:', err);
+			}
+		});
 	}
 
 	/**
@@ -1270,6 +1313,283 @@ class MatrixStore {
 		}
 	}
 
+	// ─────────────────────────────────────────────────────────
+	// VoIP / Call Actions
+	// ─────────────────────────────────────────────────────────
+
+	/**
+	 * Set call callbacks for UI notifications
+	 */
+	setCallCallbacks(callbacks: CallCallbacks) {
+		this._callCallbacks = callbacks;
+	}
+
+	/**
+	 * Place a voice call to the current room
+	 */
+	async placeVoiceCall(roomId?: string): Promise<boolean> {
+		const targetRoomId = roomId || this._currentRoomId;
+		if (!this._client || !targetRoomId) return false;
+
+		try {
+			// Import WebRTC types from the submodule
+			const webrtc = await import('matrix-js-sdk/lib/webrtc/call');
+			const { CallEvent, CallState } = webrtc;
+
+			// Create the call
+			const call = this._client.createCall(targetRoomId);
+			if (!call) {
+				console.error('Failed to create call');
+				return false;
+			}
+
+			this._matrixCall = call;
+
+			// Set up event handlers
+			this.setupCallEventHandlers(call, CallEvent, CallState);
+
+			// Place the voice call
+			await call.placeVoiceCall();
+
+			// Update active call state
+			this._activeCall = this.matrixCallToSimpleCall(call, 'voice', 'outbound');
+
+			return true;
+		} catch (err) {
+			console.error('Error placing voice call:', err);
+			this._error = 'Failed to start voice call';
+			return false;
+		}
+	}
+
+	/**
+	 * Place a video call to the current room
+	 */
+	async placeVideoCall(roomId?: string): Promise<boolean> {
+		const targetRoomId = roomId || this._currentRoomId;
+		if (!this._client || !targetRoomId) return false;
+
+		try {
+			// Import WebRTC types from the submodule
+			const webrtc = await import('matrix-js-sdk/lib/webrtc/call');
+			const { CallEvent, CallState } = webrtc;
+
+			// Create the call
+			const call = this._client.createCall(targetRoomId);
+			if (!call) {
+				console.error('Failed to create call');
+				return false;
+			}
+
+			this._matrixCall = call;
+
+			// Set up event handlers
+			this.setupCallEventHandlers(call, CallEvent, CallState);
+
+			// Place the video call
+			await call.placeVideoCall();
+
+			// Update active call state
+			this._activeCall = this.matrixCallToSimpleCall(call, 'video', 'outbound');
+
+			return true;
+		} catch (err) {
+			console.error('Error placing video call:', err);
+			this._error = 'Failed to start video call';
+			return false;
+		}
+	}
+
+	/**
+	 * Answer an incoming call
+	 */
+	async answerCall(): Promise<boolean> {
+		if (!this._matrixCall || !this._incomingCall) return false;
+
+		try {
+			await this._matrixCall.answer();
+			this._activeCall = { ...this._incomingCall };
+			this._incomingCall = null;
+			return true;
+		} catch (err) {
+			console.error('Error answering call:', err);
+			return false;
+		}
+	}
+
+	/**
+	 * Reject an incoming call
+	 */
+	rejectCall(): boolean {
+		if (!this._matrixCall || !this._incomingCall) return false;
+
+		try {
+			this._matrixCall.reject();
+			this._incomingCall = null;
+			this._matrixCall = null;
+			return true;
+		} catch (err) {
+			console.error('Error rejecting call:', err);
+			return false;
+		}
+	}
+
+	/**
+	 * Hang up the current call
+	 */
+	hangupCall(): boolean {
+		if (!this._matrixCall) return false;
+
+		try {
+			this._matrixCall.hangup('user_hangup', false);
+			this._activeCall = null;
+			this._matrixCall = null;
+			return true;
+		} catch (err) {
+			console.error('Error hanging up call:', err);
+			return false;
+		}
+	}
+
+	/**
+	 * Toggle microphone mute
+	 */
+	toggleMicMute(): boolean {
+		if (!this._matrixCall || !this._activeCall) return false;
+
+		try {
+			const muted = this._matrixCall.isMicrophoneMuted();
+			this._matrixCall.setMicrophoneMuted(!muted);
+			this._activeCall = { ...this._activeCall, isMicMuted: !muted };
+			return true;
+		} catch (err) {
+			console.error('Error toggling mic mute:', err);
+			return false;
+		}
+	}
+
+	/**
+	 * Toggle camera mute (for video calls)
+	 */
+	toggleCameraMute(): boolean {
+		if (!this._matrixCall || !this._activeCall) return false;
+
+		try {
+			const muted = this._matrixCall.isLocalVideoMuted();
+			this._matrixCall.setLocalVideoMuted(!muted);
+			this._activeCall = { ...this._activeCall, isCameraMuted: !muted };
+			return true;
+		} catch (err) {
+			console.error('Error toggling camera mute:', err);
+			return false;
+		}
+	}
+
+	/**
+	 * Set up call event handlers
+	 */
+	// eslint-disable-next-line @typescript-eslint/no-explicit-any
+	private setupCallEventHandlers(call: any, CallEvent: any, CallState: any) {
+		// State changes
+		call.on(CallEvent.State, (state: string, oldState: string) => {
+			console.log(`Call state: ${oldState} -> ${state}`);
+
+			if (this._activeCall) {
+				this._activeCall = {
+					...this._activeCall,
+					state: state as CallStateType,
+				};
+				this._callCallbacks.onCallStateChange?.(this._activeCall);
+			}
+
+			// Handle call ending
+			if (state === CallState.Ended) {
+				const reason = call.hangupReason;
+				const endedCall = this._activeCall;
+				this._activeCall = null;
+				this._matrixCall = null;
+				if (endedCall) {
+					this._callCallbacks.onCallEnded?.(endedCall, reason);
+				}
+			}
+		});
+
+		// Feeds changed (audio/video streams)
+		call.on(CallEvent.FeedsChanged, (feeds: any[]) => {
+			if (this._activeCall) {
+				const localFeed = feeds.find((f) => f.isLocal());
+				const remoteFeed = feeds.find((f) => !f.isLocal());
+
+				this._activeCall = {
+					...this._activeCall,
+					localStream: localFeed?.stream,
+					remoteStream: remoteFeed?.stream,
+				};
+			}
+		});
+
+		// Error handling
+		call.on(CallEvent.Error, (error: any) => {
+			console.error('Call error:', error);
+			this._error = `Call error: ${error.message || 'Unknown error'}`;
+		});
+
+		// Hangup
+		call.on(CallEvent.Hangup, () => {
+			const endedCall = this._activeCall;
+			this._activeCall = null;
+			this._matrixCall = null;
+			if (endedCall) {
+				this._callCallbacks.onCallEnded?.(endedCall, call.hangupReason);
+			}
+		});
+	}
+
+	/**
+	 * Handle incoming call from the SDK
+	 */
+	// eslint-disable-next-line @typescript-eslint/no-explicit-any
+	private handleIncomingCall(call: any, CallEvent: any, CallState: any) {
+		this._matrixCall = call;
+
+		// Determine call type from the call object
+		const callType: CallType = call.type === 'video' ? 'video' : 'voice';
+
+		// Create simple call representation
+		const simpleCall = this.matrixCallToSimpleCall(call, callType, 'inbound');
+		this._incomingCall = simpleCall;
+
+		// Set up event handlers
+		this.setupCallEventHandlers(call, CallEvent, CallState);
+
+		// Notify UI
+		this._callCallbacks.onIncomingCall?.(simpleCall);
+	}
+
+	/**
+	 * Convert MatrixCall to SimpleCall
+	 */
+	// eslint-disable-next-line @typescript-eslint/no-explicit-any
+	private matrixCallToSimpleCall(call: any, type: CallType, direction: CallDirection): SimpleCall {
+		const opponent = call.getOpponentMember?.();
+		const room = this._client?.getRoom(call.roomId);
+
+		return {
+			callId: call.callId,
+			roomId: call.roomId,
+			state: (call.state || 'fledgling') as CallStateType,
+			type,
+			direction,
+			opponentUserId: opponent?.userId,
+			opponentName: opponent?.name || room?.name || 'Unbekannt',
+			opponentAvatar: opponent?.getAvatarUrl?.(this._client?.baseUrl || '', 48, 48, 'scale'),
+			isMicMuted: call.isMicrophoneMuted?.() || false,
+			isCameraMuted: call.isLocalVideoMuted?.() || false,
+			isScreenSharing: false,
+			isRemoteOnHold: call.isRemoteOnHold?.() || false,
+		};
+	}
+
 	// ─────────────────────────────────────────────────────────
 	// Cleanup
 	// ─────────────────────────────────────────────────────────
@@ -1278,6 +1598,15 @@ class MatrixStore {
 	 * Stop the client and clean up
 	 */
 	destroy() {
+		// Hang up any active call
+		if (this._matrixCall) {
+			try {
+				this._matrixCall.hangup('user_hangup', false);
+			} catch {
+				// Ignore errors during cleanup
+			}
+		}
+
 		this._client?.stopClient();
 		this._client = null;
 		this._syncState = 'STOPPED';
@@ -1293,6 +1622,11 @@ class MatrixStore {
 		this._keyBackupEnabled = false;
 		this._crossSigningReady = false;
 		this._cryptoCallbacks = {};
+		// Reset call state
+		this._activeCall = null;
+		this._incomingCall = null;
+		this._matrixCall = null;
+		this._callCallbacks = {};
 	}
 
 	/**
diff --git a/apps/matrix/apps/web/src/lib/matrix/types.ts b/apps/matrix/apps/web/src/lib/matrix/types.ts
index 2a29f14cb..0e758cd49 100644
--- a/apps/matrix/apps/web/src/lib/matrix/types.ts
+++ b/apps/matrix/apps/web/src/lib/matrix/types.ts
@@ -247,3 +247,62 @@ export interface CrossSigningStatus {
 	privateKeysInSecretStorage: boolean;
 	privateKeysCachedLocally: boolean;
 }
+
+// ─────────────────────────────────────────────────────────
+// VoIP / Call Types
+// ─────────────────────────────────────────────────────────
+
+/**
+ * Call state
+ */
+export type CallState =
+	| 'fledgling'
+	| 'invite_sent'
+	| 'wait_local_media'
+	| 'create_offer'
+	| 'create_answer'
+	| 'connecting'
+	| 'connected'
+	| 'ringing'
+	| 'ended';
+
+/**
+ * Call type (voice or video)
+ */
+export type CallType = 'voice' | 'video';
+
+/**
+ * Call direction
+ */
+export type CallDirection = 'inbound' | 'outbound';
+
+/**
+ * Simplified call info for UI
+ */
+export interface SimpleCall {
+	callId: string;
+	roomId: string;
+	state: CallState;
+	type: CallType;
+	direction: CallDirection;
+	opponentUserId?: string;
+	opponentName?: string;
+	opponentAvatar?: string;
+	startTime?: number;
+	duration?: number;
+	isMicMuted: boolean;
+	isCameraMuted: boolean;
+	isScreenSharing: boolean;
+	isRemoteOnHold: boolean;
+	localStream?: MediaStream;
+	remoteStream?: MediaStream;
+}
+
+/**
+ * Call event callbacks for UI handling
+ */
+export interface CallCallbacks {
+	onIncomingCall?: (call: SimpleCall) => void;
+	onCallStateChange?: (call: SimpleCall) => void;
+	onCallEnded?: (call: SimpleCall, reason?: string) => void;
+}
diff --git a/apps/matrix/apps/web/src/routes/(app)/chat/+page.svelte b/apps/matrix/apps/web/src/routes/(app)/chat/+page.svelte
index 8bf8e8deb..17778ee78 100644
--- a/apps/matrix/apps/web/src/routes/(app)/chat/+page.svelte
+++ b/apps/matrix/apps/web/src/routes/(app)/chat/+page.svelte
@@ -4,9 +4,14 @@
 	import CreateRoomDialog from '$lib/components/chat/CreateRoomDialog.svelte';
 	import RoomSettingsPanel from '$lib/components/chat/RoomSettingsPanel.svelte';
 	import SearchDialog from '$lib/components/chat/SearchDialog.svelte';
+	import { CallView, IncomingCallDialog } from '$lib/components/call';
 	import { ChatCircle, Plus, Gear } from '@manacore/shared-icons';
 	import { browser } from '$app/environment';
 
+	// Call state
+	let activeCall = $derived(matrixStore.activeCall);
+	let incomingCall = $derived(matrixStore.incomingCall);
+
 	// Start with sidebar closed on mobile
 	let sidebarOpen = $state(browser ? window.innerWidth >= 1024 : true);
 	let showCreateRoom = $state(false);
@@ -69,6 +74,31 @@
 	function handleRoomCreated(roomId: string) {
 		matrixStore.selectRoom(roomId);
 	}
+
+	// Call handlers
+	async function handleVoiceCall() {
+		if (matrixStore.currentRoom) {
+			await matrixStore.placeVoiceCall(matrixStore.currentRoom.roomId);
+		}
+	}
+
+	async function handleVideoCall() {
+		if (matrixStore.currentRoom) {
+			await matrixStore.placeVideoCall(matrixStore.currentRoom.roomId);
+		}
+	}
+
+	function handleCallHangup() {
+		// Call ended - UI will update automatically
+	}
+
+	function handleCallAnswer() {
+		// Call answered - UI will update automatically
+	}
+
+	function handleCallReject() {
+		// Call rejected - UI will update automatically
+	}
 </script>
 
 <div class="chat-layout flex h-full min-h-0 overflow-hidden bg-background relative">
@@ -139,6 +169,8 @@
 				onMenuClick={toggleSidebar}
 				onInfoClick={() => (showRoomSettings = true)}
 				onSearchClick={() => (showSearch = true)}
+				onVoiceCall={handleVoiceCall}
+				onVideoCall={handleVideoCall}
 			/>
 
 			<!-- Timeline -->
@@ -202,3 +234,13 @@
 
 <!-- Search Dialog -->
 <SearchDialog open={showSearch} onClose={() => (showSearch = false)} />
+
+<!-- Active Call View -->
+{#if activeCall}
+	<CallView call={activeCall} onHangup={handleCallHangup} />
+{/if}
+
+<!-- Incoming Call Dialog -->
+{#if incomingCall && !activeCall}
+	<IncomingCallDialog call={incomingCall} onAnswer={handleCallAnswer} onReject={handleCallReject} />
+{/if}