feat: embed Twitch stream player

src/App.svelte

@@ -24,6 +24,8 @@
   let streamLanguage = 'en';
   let streamTags = '';
   let streamClassificationLabels = '';
+  let streamerName = '';
+  let playerSrc = '';
   let categorySearch = '';
   let categoryOptions: Array<{ id: string; name: string; box_art_url: string }> = [];
   let categorySearchTimer: number | undefined;
@@ -174,7 +176,9 @@
         headers: { authorization: `Bearer ${sessionToken}` },
       });
       if (!response.ok) return;
-      const info: { title: string; game_id: string; game_name: string; language: string; tags: string[]; content_classification_labels: string[] } = await response.json();
+      const info: { broadcaster_name: string; title: string; game_id: string; game_name: string; language: string; tags: string[]; content_classification_labels: string[] } = await response.json();
+      streamerName = info.broadcaster_name;
+      playerSrc = `https://player.twitch.tv/?channel=${encodeURIComponent(info.broadcaster_name)}&parent=${encodeURIComponent(window.location.hostname)}&muted=true`;
       streamTitle = info.title;
       streamGameId = info.game_id;
       categorySearch = info.game_name;
@@ -333,7 +337,7 @@
         </section>
       {:else}
       <div class="dashboard-grid">
-        <section class="panel preview-panel"><div class="panel-header"><span>STREAM PREVIEW</span><span class="panel-menu">⋮</span></div><div class="preview-stage"><div class="offline-mark">STREAM OFFLINE</div><div class="offline-subtitle">CONNECT TWITCH TO BEGIN</div></div><div class="panel-footer"><span class="micro">VIDEO PLAYER</span><span class="badge">OFFLINE</span></div></section>
+        <section class="panel preview-panel"><div class="panel-header"><span>STREAM PREVIEW</span><span class="panel-menu">⋮</span></div>{#if playerSrc}<iframe class="twitch-player" title={`Twitch player for ${streamerName}`} src={playerSrc} allowfullscreen></iframe>{:else}<div class="preview-stage"><div class="offline-mark">STREAM OFFLINE</div><div class="offline-subtitle">CONNECT TWITCH TO BEGIN</div></div>{/if}<div class="panel-footer"><span class="micro">VIDEO PLAYER</span><span class="badge">{playerSrc ? streamerName : 'OFFLINE'}</span></div></section>
         <section class="panel activity-panel"><div class="panel-header"><span>ACTIVITY FEED</span><span class="panel-menu">⋮</span></div><div class="panel-tabs"><button class="tab active">ALL ACTIVITY</button><button class="tab">MODERATION</button></div>{#if activityEvents.length}<div class="activity-list">{#each activityEvents as event}<div class="activity-row"><span class="activity-type">{event.event_type}</span><span class="activity-time">{new Date(event.occurred_at).toLocaleTimeString()}</span></div>{/each}</div>{:else}<div class="empty-state"><div class="empty-glyph">◌</div><strong>Nothing here yet</strong><span>Follows, subscriptions, raids, and server events will appear here.</span></div>{/if}</section>
         <section class="panel chat-panel"><div class="panel-header"><span>MY CHAT</span><span class="panel-menu">⋮</span></div><div class="chat-empty"><div class="empty-glyph">⌁</div><strong>Chat is waiting</strong><span>Connect a streamer or bot account to begin.</span></div><div class="chat-composer"><input class="control" placeholder="Send a message" disabled /><button class="primary" disabled>SEND</button></div></section>
         <section class="panel quick-panel"><div class="panel-header"><span>QUICK ACTIONS</span><span class="panel-menu">⋮</span></div><div class="quick-grid"><button class="quick-action accent" onclick={() => (showStreamEditor = !showStreamEditor)}>EDIT STREAM INFO</button><button class="quick-action">MODERATION</button><button class="quick-action">BOT COMMANDS</button><button class="quick-action">OVERLAYS</button></div>{#if showStreamEditor}<div class="stream-editor"><label class="micro" for="stream-title">TITLE</label><input id="stream-title" class="control" bind:value={streamTitle} maxlength="140" /><label class="micro" for="stream-category">CATEGORY</label><input id="stream-category" class="control" value={categorySearch} oninput={(event) => searchCategories(event.currentTarget.value)} autocomplete="off" placeholder="Search Twitch categories" />{#if categoryOptions.length}<div class="category-options">{#each categoryOptions as category}<button class="category-option" onclick={() => { streamGameId = category.id; categorySearch = category.name; categoryOptions = []; }}><span>{category.name}</span><span class="mono">{category.id}</span></button>{/each}</div>{/if}<label class="micro" for="stream-language">LANGUAGE</label><input id="stream-language" class="control" bind:value={streamLanguage} maxlength="10" /><label class="micro" for="stream-tags">TAGS</label><input id="stream-tags" class="control" bind:value={streamTags} placeholder="comma, separated" /><label class="micro" for="stream-labels">CLASSIFICATION LABELS</label><input id="stream-labels" class="control" bind:value={streamClassificationLabels} placeholder="comma, separated" /><button class="primary control-button" onclick={saveStreamInfo} disabled={streamBusy}>SAVE STREAM INFO</button>{#if streamError}<div class="auth-error">{streamError}</div>{/if}</div>{/if}</section>

src/styles.css

@@ -366,6 +366,14 @@ label {
   background: color-mix(in srgb, var(--ed-accent) 3%, var(--ed-bg));
   text-align: center;
 }
+.twitch-player {
+  display: block;
+  width: 100%;
+  min-height: 260px;
+  flex: 1;
+  border: 0;
+  background: #000;
+}
 .offline-mark {
   color: var(--ed-fg);
   font: 700 24px var(--font-display);