[UX] 界面优化 - 移除URL输入 + API配置改为弹窗

用户需求:
1. 移除"输入图像URL (每行一个)"功能
2. 将API配置改为点击设置按钮弹出的窗口，节省空间

实现内容:
- 删除图像URL输入的textarea组件
- 移除桌面端的API配置卡片（折叠式）
- 添加固定定位的设置按钮（右上角齿轮图标）
- 创建API配置弹窗（居中显示，点击遮罩或Esc关闭）

技术细节:
- templates/index.html:264-267 - 删除imageUrls输入区域
- templates/index.html:154-192 - 移除apiConfigCard
- templates/index.html:152-154 - 添加settings-floating-btn
- templates/index.html:378-414 - 添加settings-modal弹窗
- static/style.css:2988-3083 - 添加弹窗样式
- static/script.js:2657-2677 - 添加弹窗控制函数

UI改进:
✅ 节省左侧面板垂直空间
✅ 设置按钮始终可见，易于访问
✅ 弹窗居中，避免干扰主工作区
✅ 支持Esc键关闭，增强用户体验

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

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

static/script.js

@@ -2653,3 +2653,25 @@ function syncMainToDrawer() {
     const drawerPrompt = document.getElementById('drawerPrompt');
     if (drawerPrompt) drawerPrompt.value = mainPrompt;
 }
+
+// Settings Modal Functions
+function toggleSettingsModal() {
+    const modal = document.getElementById('settingsModal');
+    if (modal) {
+        modal.classList.toggle('show');
+    }
+}
+
+function closeSettingsModal(event) {
+    const modal = document.getElementById('settingsModal');
+    if (modal && (event === undefined || event.target === modal)) {
+        modal.classList.remove('show');
+    }
+}
+
+// Close modal on Escape key
+document.addEventListener('keydown', function(e) {
+    if (e.key === 'Escape') {
+        closeSettingsModal();
+    }
+});

static/style.css

@@ -2983,4 +2983,101 @@ select:focus-visible,
                     0 0 20px rgba(0, 122, 255, 0.1);
         border-color: var(--brand-primary);
     }
+}
+
+/* Settings Floating Button */
+.settings-floating-btn {
+    position: fixed;
+    top: 20px;
+    right: 20px;
+    width: 48px;
+    height: 48px;
+    border-radius: 50%;
+    background: var(--surface-primary);
+    border: 1px solid var(--border-light);
+    font-size: 24px;
+    cursor: pointer;
+    z-index: 999;
+    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
+    transition: all 0.2s ease;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+}
+
+.settings-floating-btn:hover {
+    transform: scale(1.1);
+    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
+}
+
+/* Settings Modal */
+.settings-modal {
+    display: none;
+    position: fixed;
+    top: 0;
+    left: 0;
+    width: 100%;
+    height: 100%;
+    background: rgba(0, 0, 0, 0.5);
+    z-index: 1000;
+    align-items: center;
+    justify-content: center;
+}
+
+.settings-modal.show {
+    display: flex;
+}
+
+.settings-modal-content {
+    background: var(--surface-primary);
+    border-radius: var(--radius-lg);
+    max-width: 500px;
+    width: 90%;
+    max-height: 80vh;
+    overflow-y: auto;
+    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
+}
+
+.settings-modal-header {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    padding: var(--spacing-4);
+    border-bottom: 1px solid var(--border-light);
+}
+
+.settings-modal-header h2 {
+    margin: 0;
+    font-size: var(--font-lg);
+}
+
+.modal-close-btn {
+    width: 32px;
+    height: 32px;
+    border-radius: 50%;
+    border: none;
+    background: transparent;
+    font-size: 24px;
+    cursor: pointer;
+    color: var(--text-secondary);
+    transition: all 0.2s ease;
+}
+
+.modal-close-btn:hover {
+    background: var(--surface-secondary);
+    color: var(--text-primary);
+}
+
+.settings-modal-body {
+    padding: var(--spacing-4);
+}
+
+.settings-modal-body .form-group {
+    margin-bottom: var(--spacing-4);
+}
+
+@media (max-width: 768px) {
+    .settings-floating-btn {
+        display: none;
+    }
 }

templates/index.html

@@ -148,49 +148,14 @@
     </div>
 
     <div class="app-container" id="main-content">
+        <!-- Settings Button (fixed position) -->
+        <button class="settings-floating-btn" onclick="toggleSettingsModal()" title="打开设置">
+            ⚙️
+        </button>
+
         <!-- Left Panel: Controls (desktop) -->
         <div class="left-panel">
             <div class="controls-section">
-                <div class="card collapsed" id="apiConfigCard">
-                    <div class="card-header">
-                        <h2>🔑 API配置</h2>
-                        <button type="button" class="settings-toggle-btn" onclick="toggleApiConfig()"
-                                aria-expanded="false" aria-controls="apiConfigContent" title="展开/收起API配置">
-                            <span class="toggle-icon">▼</span>
-                        </button>
-                    </div>
-                    <div class="settings-content" id="apiConfigContent">
-                    <div class="settings-grid">
-                        <div class="form-group">
-                            <label for="apiKey">FAL API密钥</label>
-                            <div class="api-key-input-group">
-                                <input type="password" id="apiKey" placeholder="请输入您的FAL API密钥" />
-                                <button type="button" id="toggleApiKey" class="btn-icon" title="显示/隐藏密钥" aria-label="显示/隐藏密钥">👁</button>
-                                <button type="button" id="testApiKey" class="btn-test" title="测试连接">测试</button>
-                            </div>
-                            <small class="help-text">从 <a href="https://fal.ai" target="_blank">fal.ai</a> 获取您的API密钥</small>
-                            <div id="apiKeyStatus" class="api-key-status" role="status" aria-live="polite"></div>
-                        </div>
-                        <div class="form-group">
-                            <label for="modelSelect">模型选择</label>
-                            <select id="modelSelect">
-                                <option value="fal-ai/bytedance/seedream/v4/edit">图像编辑</option>
-                                <option value="fal-ai/qwen-image-edit-plus">图像编辑 (通义千问)</option>
-                                <option value="fal-ai/bytedance/seedream/v4/text-to-image">文本生成图像</option>
-                            </select>
-                            <small class="help-text">选择用于生成的模型</small>
-                        </div>
-                        <div class="form-group">
-                            <div class="checkbox-group">
-                                <input type="checkbox" id="enableSDE" />
-                                <label for="enableSDE">启用结构化指令编辑器 (SDE)</label>
-                            </div>
-                            <small class="help-text">将提示词拆分为三个模块：参考协议、场景描述、风格化协议</small>
-                        </div>
-                    </div>
-                    </div>
-                </div>
-
                 <div class="card">
                     <div class="card-header">
                         <h2 id="promptTitle">✏️ 编辑指令</h2>
@@ -260,11 +225,6 @@
                         <small class="help-text upload-limits">单文件 ≤16MB，支持JPG、PNG、WebP格式</small>
                         <div id="imagePreview" class="image-preview"></div>
                     </div>
-
-                    <div class="form-group">
-                        <label for="imageUrls">或输入图像URL (每行一个)</label>
-                        <textarea id="imageUrls" rows="3" placeholder="https://example.com/image1.jpg&#10;https://example.com/image2.jpg"></textarea>
-                    </div>
                 </div>
 
                 <div class="card collapsed" id="settingsCard">
@@ -415,6 +375,44 @@
         </div>
     </div>
 
+    <!-- Settings Modal -->
+    <div class="settings-modal" id="settingsModal" onclick="closeSettingsModal(event)">
+        <div class="settings-modal-content" onclick="event.stopPropagation()">
+            <div class="settings-modal-header">
+                <h2>🔑 API配置</h2>
+                <button type="button" class="modal-close-btn" onclick="closeSettingsModal()" title="关闭">×</button>
+            </div>
+            <div class="settings-modal-body">
+                <div class="form-group">
+                    <label for="apiKey">FAL API密钥</label>
+                    <div class="api-key-input-group">
+                        <input type="password" id="apiKey" placeholder="请输入您的FAL API密钥" />
+                        <button type="button" id="toggleApiKey" class="btn-icon" title="显示/隐藏密钥" aria-label="显示/隐藏密钥">👁</button>
+                        <button type="button" id="testApiKey" class="btn-test" title="测试连接">测试</button>
+                    </div>
+                    <small class="help-text">从 <a href="https://fal.ai" target="_blank">fal.ai</a> 获取您的API密钥</small>
+                    <div id="apiKeyStatus" class="api-key-status" role="status" aria-live="polite"></div>
+                </div>
+                <div class="form-group">
+                    <label for="modelSelect">模型选择</label>
+                    <select id="modelSelect">
+                        <option value="fal-ai/bytedance/seedream/v4/edit">图像编辑</option>
+                        <option value="fal-ai/qwen-image-edit-plus">图像编辑 (通义千问)</option>
+                        <option value="fal-ai/bytedance/seedream/v4/text-to-image">文本生成图像</option>
+                    </select>
+                    <small class="help-text">选择用于生成的模型</small>
+                </div>
+                <div class="form-group">
+                    <div class="checkbox-group">
+                        <input type="checkbox" id="enableSDE" />
+                        <label for="enableSDE">启用结构化指令编辑器 (SDE)</label>
+                    </div>
+                    <small class="help-text">将提示词拆分为三个模块：参考协议、场景描述、风格化协议</small>
+                </div>
+            </div>
+        </div>
+    </div>
+
     <!-- Non-intrusive Notification System -->
     <div class="banner" role="status" aria-live="polite" hidden id="banner"></div>
     <div class="toasts" aria-live="polite" aria-atomic="true" id="toasts"></div>