add Twitch style emote autocomplete

src/App.svelte

@@ -36,6 +36,8 @@
   let categorySearchTimer: number | undefined;
   let chatIdentity: 'streamer' | 'bot' = 'streamer';
   let chatMessage = '';
+  let chatEmoteOptions: Array<{ name: string; url: string; provider: string }> = [];
+  let chatEmoteTimer: number | undefined;
   let chatBusy = false;
   let chatError = '';
   let showModeration = false;
@@ -313,6 +315,31 @@
     }
   }
 
+  function searchChatEmotes(value: string) {
+    const match = value.match(/(^|\s):([A-Za-z0-9_]{1,64})$/);
+    chatEmoteOptions = [];
+    if (chatEmoteTimer) window.clearTimeout(chatEmoteTimer);
+    if (!match) return;
+    const query = match[2];
+    chatEmoteTimer = window.setTimeout(async () => {
+      try {
+        const response = await fetch(`${serverAddress}/api/v1/twitch/chat/emotes?query=${encodeURIComponent(query)}`, {
+          headers: { authorization: `Bearer ${sessionToken}` },
+        });
+        if (response.ok) chatEmoteOptions = await response.json();
+      } catch {
+        chatEmoteOptions = [];
+      }
+    }, 200);
+  }
+
+  function selectChatEmote(name: string) {
+    const match = chatMessage.match(/(^|\s):[A-Za-z0-9_]{1,64}$/);
+    if (!match) return;
+    chatMessage = `${chatMessage.slice(0, chatMessage.length - match[0].length)}${match[1]}${name} `;
+    chatEmoteOptions = [];
+  }
+
   function replyToChatMessage(message: { message_id: string; user_name: string }) {
     chatReplyParent = { message_id: message.message_id, user_name: message.user_name };
   }
@@ -464,7 +491,7 @@
       <div class="dashboard-grid">
         <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>{#if chatMessages.length}<div class="chat-message-list">{#each chatMessages as message}<div class="chat-message"><span class="chat-user">{message.user_name}</span><span class="chat-text">{message.text}</span><button class="chat-reply" onclick={() => replyToChatMessage(message)}>REPLY</button></div>{/each}</div>{:else}<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>{/if}<div class="chat-composer">{#if chatReplyParent}<div class="chat-reply-context">REPLYING TO @{chatReplyParent.user_name}<button class="secondary" onclick={() => (chatReplyParent = undefined)}>×</button></div>{/if}<div class="chat-identity-toggle"><button class:active={chatIdentity === 'streamer'} class="chat-identity" onclick={() => (chatIdentity = 'streamer')}>STREAMER</button><button class:active={chatIdentity === 'bot'} class="chat-identity" onclick={() => (chatIdentity = 'bot')}>BOT</button></div><div class="chat-send-row"><input class="control" bind:value={chatMessage} maxlength="500" placeholder={`Send as ${chatIdentity}`} onkeydown={(event) => event.key === 'Enter' && sendChatMessage()} /><button class="primary" onclick={sendChatMessage} disabled={chatBusy || !chatMessage.trim()}>SEND</button></div>{#if chatError}<div class="auth-error">{chatError}</div>{/if}</div></section>
+        <section class="panel chat-panel"><div class="panel-header"><span>MY CHAT</span><span class="panel-menu">⋮</span></div>{#if chatMessages.length}<div class="chat-message-list">{#each chatMessages as message}<div class="chat-message"><span class="chat-user">{message.user_name}</span><span class="chat-text">{message.text}</span><button class="chat-reply" onclick={() => replyToChatMessage(message)}>REPLY</button></div>{/each}</div>{:else}<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>{/if}<div class="chat-composer">{#if chatReplyParent}<div class="chat-reply-context">REPLYING TO @{chatReplyParent.user_name}<button class="secondary" onclick={() => (chatReplyParent = undefined)}>×</button></div>{/if}<div class="chat-identity-toggle"><button class:active={chatIdentity === 'streamer'} class="chat-identity" onclick={() => (chatIdentity = 'streamer')}>STREAMER</button><button class:active={chatIdentity === 'bot'} class="chat-identity" onclick={() => (chatIdentity = 'bot')}>BOT</button></div>{#if chatEmoteOptions.length}<div class="chat-emote-picker">{#each chatEmoteOptions as emote}<button class="chat-emote-option" onclick={() => selectChatEmote(emote.name)}><img src={emote.url} alt={emote.name} /><span>{emote.name}</span><span class="micro">{emote.provider}</span></button>{/each}</div>{/if}<div class="chat-send-row"><input class="control" bind:value={chatMessage} maxlength="500" placeholder={`Send as ${chatIdentity}`} oninput={() => searchChatEmotes(chatMessage)} onkeydown={(event) => event.key === 'Enter' && sendChatMessage()} /><button class="primary" onclick={sendChatMessage} disabled={chatBusy || !chatMessage.trim()}>SEND</button></div>{#if chatError}<div class="auth-error">{chatError}</div>{/if}</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" onclick={() => (showModeration = !showModeration)}>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}{#if showModeration}<div class="stream-editor"><label class="micro" for="moderation-action">ACTION</label><select id="moderation-action" class="control" bind:value={moderationAction}><option value="timeout">TIMEOUT</option><option value="ban">BAN</option><option value="unban">UNBAN</option><option value="delete_message">DELETE MESSAGE</option></select><label class="micro" for="moderation-user">USER ID</label><input id="moderation-user" class="control" bind:value={moderationUserId} maxlength="64" /><label class="micro" for="moderation-message">MESSAGE ID (DELETE)</label><input id="moderation-message" class="control" bind:value={moderationMessageId} maxlength="128" /><label class="micro" for="moderation-duration">TIMEOUT SECONDS</label><input id="moderation-duration" class="control" type="number" min="1" max="1209600" bind:value={moderationDuration} /><label class="micro" for="moderation-reason">REASON</label><input id="moderation-reason" class="control" maxlength="500" bind:value={moderationReason} /><button class="primary control-button" onclick={applyModeration} disabled={moderationBusy || !moderationUserId}>APPLY MODERATION</button>{#if moderationError}<div class="auth-error">{moderationError}</div>{/if}</div>{/if}</section>
       </div>
       {/if}

src/styles.css

@@ -278,6 +278,30 @@ button:hover:not(:disabled) {
   color: var(--ed-accent);
   font: 10px var(--font-data);
 }
+.chat-emote-picker {
+  display: flex;
+  max-height: 180px;
+  flex-direction: column;
+  overflow: auto;
+  margin-bottom: 6px;
+  border: 1px solid var(--ui-line);
+  background: var(--ed-bg);
+}
+.chat-emote-option {
+  display: grid;
+  grid-template-columns: 28px 1fr auto;
+  align-items: center;
+  gap: 8px;
+  width: 100%;
+  border: 0;
+  border-bottom: 1px solid var(--ui-divider);
+  text-align: left;
+}
+.chat-emote-option img {
+  width: 28px;
+  height: 28px;
+  object-fit: contain;
+}
 .workspace {
   display: grid;
   grid-template-columns: 214px 1fr;