Feature: Add emoji picker for easy emoji insertion on desktop

Added a professional emoji picker widget to make it easier to insert emoji on desktop browsers where native emoji input is not readily available.

Changes:
- Added emoji-picker-element library from CDN (~50KB)
- New emoji button (😊) next to the Send button
- Full emoji picker with categories and search functionality
- Emoji inserted at cursor position in textarea
- Automatic byte counter update after insertion
- Mobile responsive: 6 columns on mobile, 8 on desktop
- Click outside to close picker

Benefits:
- Easy emoji access on Windows/Linux desktop browsers
- No need to use Win+. shortcut or copy-paste
- Professional UI with search and categories
- Still works with native emoji keyboards on mobile

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

app/static/js/app.js

@@ -24,6 +24,9 @@ document.addEventListener('DOMContentLoaded', function() {
     // Setup event listeners
     setupEventListeners();
 
+    // Setup emoji picker
+    setupEmojiPicker();
+
     // Load device status
     loadStatus();
 });
@@ -473,3 +476,58 @@ function escapeHtml(text) {
     div.textContent = text;
     return div.innerHTML;
 }
+
+/**
+ * Setup emoji picker
+ */
+function setupEmojiPicker() {
+    const emojiBtn = document.getElementById('emojiBtn');
+    const emojiPickerPopup = document.getElementById('emojiPickerPopup');
+    const messageInput = document.getElementById('messageInput');
+
+    if (!emojiBtn || !emojiPickerPopup || !messageInput) {
+        console.error('Emoji picker elements not found');
+        return;
+    }
+
+    // Create emoji-picker element
+    const picker = document.createElement('emoji-picker');
+    emojiPickerPopup.appendChild(picker);
+
+    // Toggle emoji picker on button click
+    emojiBtn.addEventListener('click', function(e) {
+        e.stopPropagation();
+        emojiPickerPopup.classList.toggle('hidden');
+    });
+
+    // Insert emoji into textarea when selected
+    picker.addEventListener('emoji-click', function(event) {
+        const emoji = event.detail.unicode;
+        const cursorPos = messageInput.selectionStart;
+        const textBefore = messageInput.value.substring(0, cursorPos);
+        const textAfter = messageInput.value.substring(messageInput.selectionEnd);
+
+        // Insert emoji at cursor position
+        messageInput.value = textBefore + emoji + textAfter;
+
+        // Update cursor position (after emoji)
+        const newCursorPos = cursorPos + emoji.length;
+        messageInput.setSelectionRange(newCursorPos, newCursorPos);
+
+        // Update character counter
+        updateCharCounter();
+
+        // Focus back on input
+        messageInput.focus();
+
+        // Hide picker after selection
+        emojiPickerPopup.classList.add('hidden');
+    });
+
+    // Close emoji picker when clicking outside
+    document.addEventListener('click', function(e) {
+        if (!emojiPickerPopup.contains(e.target) && e.target !== emojiBtn && !emojiBtn.contains(e.target)) {
+            emojiPickerPopup.classList.add('hidden');
+        }
+    });
+}

app/templates/index.html

@@ -2,6 +2,47 @@
 
 {% block title %}Chat - mc-webui{% endblock %}
 
+{% block extra_head %}
+<!-- Emoji Picker -->
+<script type="module" src="https://cdn.jsdelivr.net/npm/emoji-picker-element@^1/index.js"></script>
+<style>
+    emoji-picker {
+        --emoji-size: 1.5rem;
+        --num-columns: 8;
+    }
+    .emoji-picker-container {
+        position: relative;
+    }
+    .emoji-picker-popup {
+        position: absolute;
+        bottom: 100%;
+        right: 0;
+        z-index: 1000;
+        margin-bottom: 0.5rem;
+        box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
+        border-radius: 0.5rem;
+        overflow: hidden;
+    }
+    .emoji-picker-popup.hidden {
+        display: none;
+    }
+
+    /* Mobile responsive adjustments */
+    @media (max-width: 576px) {
+        emoji-picker {
+            --emoji-size: 1.25rem;
+            --num-columns: 6;
+        }
+        .emoji-picker-popup {
+            right: auto;
+            left: 0;
+            width: 100%;
+            max-width: 100%;
+        }
+    }
+</style>
+{% endblock %}
+
 {% block content %}
 <div class="container-fluid d-flex flex-column" style="height: 100%;">
     <!-- Messages Container -->
@@ -25,18 +66,25 @@
     <div class="row border-top bg-light">
         <div class="col-12">
             <form id="sendMessageForm" class="p-3">
-                <div class="input-group">
-                    <textarea
-                        id="messageInput"
-                        class="form-control"
-                        placeholder="Type a message..."
-                        rows="2"
-                        maxlength="500"
-                        required
-                    ></textarea>
-                    <button type="submit" class="btn btn-primary px-4" id="sendBtn">
-                        <i class="bi bi-send"></i> Send
-                    </button>
+                <div class="emoji-picker-container">
+                    <div class="input-group">
+                        <textarea
+                            id="messageInput"
+                            class="form-control"
+                            placeholder="Type a message..."
+                            rows="2"
+                            maxlength="500"
+                            required
+                        ></textarea>
+                        <button type="button" class="btn btn-outline-secondary" id="emojiBtn" title="Insert emoji">
+                            <i class="bi bi-emoji-smile"></i>
+                        </button>
+                        <button type="submit" class="btn btn-primary px-4" id="sendBtn">
+                            <i class="bi bi-send"></i> Send
+                        </button>
+                    </div>
+                    <!-- Emoji picker popup (hidden by default) -->
+                    <div id="emojiPickerPopup" class="emoji-picker-popup hidden"></div>
                 </div>
                 <div class="d-flex justify-content-between">
                     <small class="text-muted">Shift+Enter: new line, Enter: send</small>