Fullfør oppgave 7.4: Lyd-avspilling med waveform-visning

Legger til AudioPlayer-komponent som spiller av lyd fra CAS-noder
med waveform-visualisering via wavesurfer.js. Komponenten viser
play/pause, tidslinje, og kan ekspandere transkripsjonen.

Chat-visningen inkluderer nå media-noder (has_media-edges) sammen
med tekstmeldinger, sortert kronologisk. Talenotater vises med
mikrofon-ikon, waveform og transkripsjon.

Mottak-siden viser også AudioPlayer for media-noder med lyd.

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

frontend/package-lock.json

@@ -16,7 +16,8 @@
 				"@tiptap/extension-placeholder": "^3.20.4",
 				"@tiptap/pm": "^3.20.4",
 				"@tiptap/starter-kit": "^3.20.4",
-				"spacetimedb": "^2.0.4"
+				"spacetimedb": "^2.0.4",
+				"wavesurfer.js": "^7.12.4"
 			},
 			"devDependencies": {
 				"@sveltejs/adapter-node": "^5.5.4",
@@ -3388,6 +3389,12 @@
 			"integrity": "sha512-dpojBhNsCNN7T82Tm7k26A6G9ML3NkhDsnw9n/eoxSRlVBB4CEtIQ/KTCLI2Fwf3ataSXRhYFkQi3SlnFwPvPQ==",
 			"license": "MIT"
 		},
+		"node_modules/wavesurfer.js": {
+			"version": "7.12.4",
+			"resolved": "https://registry.npmjs.org/wavesurfer.js/-/wavesurfer.js-7.12.4.tgz",
+			"integrity": "sha512-b/+XnWfJejNdvNUmtm4M5QzQepHhUbTo+62wYybwdV1B/Sn9vHhgb1xckRm0rGY2ZefJwLkE7lYcKnLfIia4cQ==",
+			"license": "BSD-3-Clause"
+		},
 		"node_modules/zimmerframe": {
 			"version": "1.1.4",
 			"resolved": "https://registry.npmjs.org/zimmerframe/-/zimmerframe-1.1.4.tgz",

frontend/package.json

@@ -31,6 +31,7 @@
 		"@tiptap/extension-placeholder": "^3.20.4",
 		"@tiptap/pm": "^3.20.4",
 		"@tiptap/starter-kit": "^3.20.4",
-		"spacetimedb": "^2.0.4"
+		"spacetimedb": "^2.0.4",
+		"wavesurfer.js": "^7.12.4"
 	}
 }

frontend/src/lib/components/AudioPlayer.svelte

@@ -0,0 +1,146 @@
+<script lang="ts">
+	import { onMount, onDestroy } from 'svelte';
+	import WaveSurfer from 'wavesurfer.js';
+
+	interface Props {
+		/** CAS URL for the audio file */
+		src: string;
+		/** Duration in seconds (from transcription metadata, used as fallback) */
+		duration?: number;
+		/** Transcript text to show below the player */
+		transcript?: string;
+		/** Compact mode for chat bubbles */
+		compact?: boolean;
+	}
+
+	let { src, duration, transcript, compact = false }: Props = $props();
+
+	let container: HTMLDivElement | undefined = $state();
+	let wavesurfer: WaveSurfer | undefined = $state();
+	let playing = $state(false);
+	let currentTime = $state(0);
+	let totalDuration = $state(0);
+	$effect(() => { if (duration && !ready) totalDuration = duration; });
+	let ready = $state(false);
+	let loadError = $state(false);
+	let showTranscript = $state(false);
+
+	function formatTime(seconds: number): string {
+		if (!seconds || !isFinite(seconds)) return '0:00';
+		const m = Math.floor(seconds / 60);
+		const s = Math.floor(seconds % 60);
+		return `${m}:${s.toString().padStart(2, '0')}`;
+	}
+
+	onMount(() => {
+		if (!container) return;
+
+		wavesurfer = WaveSurfer.create({
+			container,
+			height: compact ? 32 : 48,
+			waveColor: '#93c5fd',
+			progressColor: '#2563eb',
+			cursorColor: '#1d4ed8',
+			cursorWidth: 2,
+			barWidth: 2,
+			barGap: 1,
+			barRadius: 2,
+			normalize: true,
+			url: src,
+		});
+
+		wavesurfer.on('ready', () => {
+			ready = true;
+			totalDuration = wavesurfer!.getDuration();
+		});
+
+		wavesurfer.on('timeupdate', (time: number) => {
+			currentTime = time;
+		});
+
+		wavesurfer.on('finish', () => {
+			playing = false;
+		});
+
+		wavesurfer.on('error', () => {
+			loadError = true;
+		});
+
+		wavesurfer.on('play', () => {
+			playing = true;
+		});
+
+		wavesurfer.on('pause', () => {
+			playing = false;
+		});
+	});
+
+	onDestroy(() => {
+		wavesurfer?.destroy();
+	});
+
+	function togglePlayback() {
+		wavesurfer?.playPause();
+	}
+</script>
+
+<div class="audio-player flex flex-col gap-1 {compact ? 'min-w-[200px]' : 'min-w-[240px]'}">
+	<div class="flex items-center gap-2">
+		<!-- Play/pause button -->
+		<button
+			onclick={togglePlayback}
+			disabled={!ready && !loadError}
+			class="flex h-8 w-8 shrink-0 items-center justify-center rounded-full transition-colors
+				{ready ? 'bg-blue-600 text-white hover:bg-blue-700' : 'bg-gray-200 text-gray-400'}
+				disabled:cursor-not-allowed"
+			aria-label={playing ? 'Pause' : 'Spill av'}
+		>
+			{#if !ready && !loadError}
+				<svg class="h-3.5 w-3.5 animate-spin" fill="none" viewBox="0 0 24 24">
+					<circle class="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" stroke-width="4"></circle>
+					<path class="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4z"></path>
+				</svg>
+			{:else if playing}
+				<svg class="h-3.5 w-3.5" fill="currentColor" viewBox="0 0 24 24">
+					<rect x="6" y="4" width="4" height="16" rx="1" />
+					<rect x="14" y="4" width="4" height="16" rx="1" />
+				</svg>
+			{:else}
+				<svg class="h-3.5 w-3.5 ml-0.5" fill="currentColor" viewBox="0 0 24 24">
+					<path d="M8 5v14l11-7z" />
+				</svg>
+			{/if}
+		</button>
+
+		<!-- Waveform -->
+		<div class="flex-1 min-w-0">
+			<div bind:this={container} class="w-full"></div>
+		</div>
+	</div>
+
+	<!-- Time display -->
+	<div class="flex items-center justify-between px-1">
+		<span class="text-[10px] text-gray-400">{formatTime(currentTime)}</span>
+		<span class="text-[10px] text-gray-400">{formatTime(totalDuration)}</span>
+	</div>
+
+	{#if loadError}
+		<p class="text-[10px] text-red-400 px-1">Kunne ikke laste lydfilen</p>
+	{/if}
+
+	<!-- Transcript toggle -->
+	{#if transcript}
+		<button
+			onclick={() => { showTranscript = !showTranscript; }}
+			class="flex items-center gap-1 px-1 text-[10px] text-gray-400 hover:text-gray-600 transition-colors"
+		>
+			<svg class="h-3 w-3 transition-transform {showTranscript ? 'rotate-90' : ''}" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="2">
+				<path stroke-linecap="round" stroke-linejoin="round" d="M9 5l7 7-7 7" />
+			</svg>
+			Transkripsjon
+		</button>
+		{#if showTranscript}
+			<p class="text-xs text-gray-500 px-1 py-1 bg-gray-50 rounded whitespace-pre-wrap">{transcript}</p>
+		{/if}
+	{/if}
+</div>

frontend/src/routes/+page.svelte

@@ -5,7 +5,8 @@
 	import type { Node } from '$lib/spacetime';
 	import NodeEditor from '$lib/components/NodeEditor.svelte';
 	import NewChatDialog from '$lib/components/NewChatDialog.svelte';
-	import { createNode, createEdge, createCommunication } from '$lib/api';
+	import AudioPlayer from '$lib/components/AudioPlayer.svelte';
+	import { createNode, createEdge, createCommunication, casUrl } from '$lib/api';
 
 	const session = $derived($page.data.session as Record<string, unknown> | undefined);
 	const nodeId = $derived(session?.nodeId as string | undefined);
@@ -103,6 +104,21 @@
 		return edges.filter((e) => !e.system).map((e) => e.edgeType);
 	}
 
+	/** Check if a node is an audio media node and extract its metadata */
+	function audioMeta(node: Node): { src: string; duration?: number } | null {
+		if (node.nodeKind !== 'media') return null;
+		try {
+			const meta = JSON.parse(node.metadata ?? '{}');
+			if (typeof meta.mime === 'string' && meta.mime.startsWith('audio/') && meta.cas_hash) {
+				return {
+					src: casUrl(meta.cas_hash),
+					duration: meta.transcription?.duration,
+				};
+			}
+		} catch { /* ignore */ }
+		return null;
+	}
+
 	let showNewChatDialog = $state(false);
 
 	/** Open the new chat dialog to pick a participant */
@@ -280,13 +296,22 @@
 							</a>
 						</li>
 					{:else}
+						{@const audio = audioMeta(node)}
 						<li class="rounded-lg border border-gray-200 bg-white p-4 shadow-sm">
 							<div class="flex items-start justify-between gap-2">
 								<div class="min-w-0 flex-1">
 									<h3 class="font-medium text-gray-900">
 										{node.title || 'Uten tittel'}
 									</h3>
-									{#if vis === 'full' && node.content}
+									{#if audio}
+										<div class="mt-2">
+											<AudioPlayer
+												src={audio.src}
+												duration={audio.duration}
+												transcript={vis === 'full' ? (node.content || undefined) : undefined}
+											/>
+										</div>
+									{:else if vis === 'full' && node.content}
 										<p class="mt-1 text-sm text-gray-500">
 											{excerpt(node.content)}
 										</p>

frontend/src/routes/chat/[id]/+page.svelte

@@ -2,8 +2,9 @@
 	import { page } from '$app/stores';
 	import { connectionState, nodeStore, edgeStore, nodeVisibility } from '$lib/spacetime';
 	import type { Node } from '$lib/spacetime';
-	import { createNode } from '$lib/api';
+	import { createNode, casUrl } from '$lib/api';
 	import ChatInput from '$lib/components/ChatInput.svelte';
+	import AudioPlayer from '$lib/components/AudioPlayer.svelte';
 	import { tick } from 'svelte';
 
 	const session = $derived($page.data.session as Record<string, unknown> | undefined);
@@ -25,15 +26,27 @@
 	const messages = $derived.by(() => {
 		if (!connected || !communicationId) return [];
 
-		// Find all belongs_to edges pointing to this communication node
+		const seen = new Set<string>();
-		const belongsToEdges = edgeStore.byTarget(communicationId)
-			.filter(e => e.edgeType === 'belongs_to');
-
-		// Resolve source nodes (the messages)
 		const nodes: Node[] = [];
-		for (const edge of belongsToEdges) {
+
+		// Text messages: belongs_to edges pointing to this communication node
+		// Edge direction: message (source) --belongs_to--> communication (target)
+		for (const edge of edgeStore.byTarget(communicationId)) {
+			if (edge.edgeType !== 'belongs_to') continue;
 			const node = nodeStore.get(edge.sourceId);
-			if (node && nodeVisibility(node, nodeId) !== 'hidden') {
+			if (node && nodeVisibility(node, nodeId) !== 'hidden' && !seen.has(node.id)) {
+				seen.add(node.id);
+				nodes.push(node);
+			}
+		}
+
+		// Media nodes: has_media edges from this communication node
+		// Edge direction: communication (source) --has_media--> media (target)
+		for (const edge of edgeStore.bySource(communicationId)) {
+			if (edge.edgeType !== 'has_media') continue;
+			const node = nodeStore.get(edge.targetId);
+			if (node && nodeVisibility(node, nodeId) !== 'hidden' && !seen.has(node.id)) {
+				seen.add(node.id);
 				nodes.push(node);
 			}
 		}
@@ -124,6 +137,31 @@
 	function isOwnMessage(node: Node): boolean {
 		return !!nodeId && node.createdBy === nodeId;
 	}
+
+	/** Check if this node is an audio media node */
+	function isAudioNode(node: Node): boolean {
+		if (node.nodeKind !== 'media') return false;
+		try {
+			const meta = JSON.parse(node.metadata ?? '{}');
+			return typeof meta.mime === 'string' && meta.mime.startsWith('audio/');
+		} catch { return false; }
+	}
+
+	/** Get CAS audio URL for a media node */
+	function audioSrc(node: Node): string {
+		try {
+			const meta = JSON.parse(node.metadata ?? '{}');
+			return casUrl(meta.cas_hash);
+		} catch { return ''; }
+	}
+
+	/** Get transcription duration from metadata */
+	function audioDuration(node: Node): number | undefined {
+		try {
+			const meta = JSON.parse(node.metadata ?? '{}');
+			return meta.transcription?.duration;
+		} catch { return undefined; }
+	}
 </script>
 
 <div class="flex h-screen flex-col bg-gray-50">
@@ -179,17 +217,34 @@
 				<div class="space-y-3">
 					{#each messages as msg (msg.id)}
 						{@const own = isOwnMessage(msg)}
+						{@const audio = isAudioNode(msg)}
 						<div class="flex {own ? 'justify-end' : 'justify-start'}">
-							<div class="max-w-[75%] {own ? 'bg-blue-600 text-white' : 'bg-white border border-gray-200 text-gray-900'} rounded-2xl px-4 py-2 shadow-sm">
+							<div class="max-w-[75%] {own ? (audio ? 'bg-blue-50 border border-blue-200 text-gray-900' : 'bg-blue-600 text-white') : 'bg-white border border-gray-200 text-gray-900'} rounded-2xl px-4 py-2 shadow-sm">
 								{#if !own}
-									<p class="mb-0.5 text-xs font-medium {own ? 'text-blue-200' : 'text-blue-600'}">
+									<p class="mb-0.5 text-xs font-medium text-blue-600">
 										{senderName(msg)}
 									</p>
 								{/if}
-								<p class="text-sm whitespace-pre-wrap break-words">
+								{#if audio}
-									{msg.content || ''}
+									<div class="flex items-center gap-1.5 mb-1">
-								</p>
+										<svg class="h-3.5 w-3.5 text-blue-500 shrink-0" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="2">
-								<p class="mt-1 text-right text-[10px] {own ? 'text-blue-200' : 'text-gray-400'}">
+											<path stroke-linecap="round" stroke-linejoin="round" d="M12 1a3 3 0 00-3 3v8a3 3 0 006 0V4a3 3 0 00-3-3z" />
+											<path stroke-linecap="round" stroke-linejoin="round" d="M19 10v2a7 7 0 01-14 0v-2" />
+										</svg>
+										<span class="text-[11px] font-medium text-blue-600">Talenotat</span>
+									</div>
+									<AudioPlayer
+										src={audioSrc(msg)}
+										duration={audioDuration(msg)}
+										transcript={msg.content || undefined}
+										compact
+									/>
+								{:else}
+									<p class="text-sm whitespace-pre-wrap break-words">
+										{msg.content || ''}
+									</p>
+								{/if}
+								<p class="mt-1 text-right text-[10px] {own && !audio ? 'text-blue-200' : 'text-gray-400'}">
 									{formatTime(msg)}
 								</p>
 							</div>

tasks.md

@@ -96,8 +96,11 @@ Uavhengige faser kan fortsatt plukkes.
 - [x] 7.1 faster-whisper oppsett: Docker-container, GPU hvis tilgjengelig, norsk modell. Ref: `docs/erfaringer/`.
 - [x] 7.2 Transkripsjons-pipeline: lydfil i CAS → maskinrommet trigger Whisper → resultat i `content`-feltet.
 - [x] 7.3 Voice memo i frontend: opptak-knapp i input-komponenten → upload → CAS → transkripsjon.
-- [~] 7.4 Lyd-avspilling: spiller av original lyd fra CAS-node. Waveform-visning.
+- [x] 7.4 Lyd-avspilling: spiller av original lyd fra CAS-node. Waveform-visning.
-  > Påbegynt: 2026-03-17T17:58
+- [ ] 7.5 Segmenttabell-migrasjon: opprett `transcription_segments`-tabell i PG. Oppdater `transcribe.rs` til SRT-format → parse → skriv segmenter. Miljøvariabler: `WHISPER_MODEL` (default "medium"), `WHISPER_INITIAL_PROMPT`. Ref: `docs/concepts/podcastfabrikken.md` § 3.
+- [ ] 7.6 Transkripsjonsvisning i frontend: segmenter med tidsstempler, avspillingsknapp per segment (hopper til riktig sted i lydfilen), redigerbare tekstfelt (setter `edited = true`). Universell komponent for podcast, møter, voice memos.
+- [ ] 7.7 Re-transkripsjonsflyt: ved ny transkripsjon, vis side-om-side med forrige versjon. Highlight manuelt redigerte segmenter fra forrige versjon. Bruker velger per segment.
+- [ ] 7.8 SRT-eksport: generer nedlastbar SRT-fil fra `transcription_segments`-tabellen.
 
 ## Fase 8: Aliaser