feat: redesign settings as slide-in sidebar with collapsible sections

- Changed from full-screen overlay to 500px slide-in sidebar from right
- Added dark overlay backdrop that dims chat
- Organized character settings into collapsible sections:
  * Basic Information (name, avatar, system prompt, greeting)
  * Roleplay Details (personality, description, scenario, examples)
  * Advanced Settings (post-history, alternate greetings)
  * Metadata (tags, creator, version, notes)
- Smooth slide and collapse animations
- Click overlay to close sidebar
- Responsive: full width on mobile
- More compact button layouts

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

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

src/index.html

@@ -55,7 +55,10 @@
         </div>
       </main>
 
-      <div class="settings-panel" id="settings-panel" style="display: none;">
+      <!-- Settings overlay backdrop -->
+      <div class="settings-overlay" id="settings-overlay"></div>
+
+      <div class="settings-panel" id="settings-panel">
         <div class="settings-header">
           <h2>Settings</h2>
           <button id="close-settings-btn" class="icon-btn">
@@ -125,6 +128,18 @@
               <label for="character-settings-select">Select Character</label>
               <select id="character-settings-select"></select>
             </div>
+
+            <!-- Basic Info Section -->
+            <div class="settings-section" data-section="basic">
+              <div class="settings-section-header">
+                <div class="settings-section-title">
+                  <svg class="settings-section-icon" viewBox="0 0 16 16" fill="none">
+                    <path d="M4 6L8 10L12 6" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/>
+                  </svg>
+                  Basic Information
+                </div>
+              </div>
+              <div class="settings-section-content">
                 <div class="form-group">
                   <label for="character-name">Character Name</label>
                   <input
@@ -174,9 +189,22 @@
                     rows="2"
                   ></textarea>
                 </div>
+              </div>
+            </div>
 
+            <!-- Roleplay Details Section -->
+            <div class="settings-section collapsed" data-section="roleplay">
+              <div class="settings-section-header">
+                <div class="settings-section-title">
+                  <svg class="settings-section-icon" viewBox="0 0 16 16" fill="none">
+                    <path d="M4 6L8 10L12 6" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/>
+                  </svg>
+                  Roleplay Details
+                </div>
+              </div>
+              <div class="settings-section-content">
                 <div class="form-group">
-              <label for="character-personality">Personality Tags (Optional)</label>
+                  <label for="character-personality">Personality Tags</label>
                   <input
                     type="text"
                     id="character-personality"
@@ -185,16 +213,16 @@
                 </div>
 
                 <div class="form-group">
-              <label for="character-description">Description (Optional)</label>
+                  <label for="character-description">Description</label>
                   <textarea
                     id="character-description"
                     placeholder="Detailed character description, appearance, background..."
-                rows="10"
+                    rows="8"
                   ></textarea>
                 </div>
 
                 <div class="form-group">
-              <label for="character-scenario">Scenario (Optional)</label>
+                  <label for="character-scenario">Scenario</label>
                   <textarea
                     id="character-scenario"
                     placeholder="The setting or situation where the character exists..."
@@ -203,16 +231,29 @@
                 </div>
 
                 <div class="form-group">
-              <label for="character-mes-example">Message Example (Optional)</label>
+                  <label for="character-mes-example">Message Examples</label>
                   <textarea
                     id="character-mes-example"
                     placeholder="Example dialogue from the character..."
                     rows="4"
                   ></textarea>
                 </div>
+              </div>
+            </div>
 
+            <!-- Advanced Settings Section -->
+            <div class="settings-section collapsed" data-section="advanced">
+              <div class="settings-section-header">
+                <div class="settings-section-title">
+                  <svg class="settings-section-icon" viewBox="0 0 16 16" fill="none">
+                    <path d="M4 6L8 10L12 6" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/>
+                  </svg>
+                  Advanced Settings
+                </div>
+              </div>
+              <div class="settings-section-content">
                 <div class="form-group">
-              <label for="character-post-history">Post-History Instructions (Optional)</label>
+                  <label for="character-post-history">Post-History Instructions</label>
                   <textarea
                     id="character-post-history"
                     placeholder="Instructions to apply after chat history..."
@@ -221,16 +262,29 @@
                 </div>
 
                 <div class="form-group">
-              <label for="character-alt-greetings">Alternate Greetings (Optional)</label>
+                  <label for="character-alt-greetings">Alternate Greetings</label>
                   <textarea
                     id="character-alt-greetings"
                     placeholder="One greeting per line..."
                     rows="3"
                   ></textarea>
                 </div>
+              </div>
+            </div>
 
+            <!-- Metadata Section -->
+            <div class="settings-section collapsed" data-section="metadata">
+              <div class="settings-section-header">
+                <div class="settings-section-title">
+                  <svg class="settings-section-icon" viewBox="0 0 16 16" fill="none">
+                    <path d="M4 6L8 10L12 6" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/>
+                  </svg>
+                  Metadata
+                </div>
+              </div>
+              <div class="settings-section-content">
                 <div class="form-group">
-              <label for="character-tags">Tags (Optional)</label>
+                  <label for="character-tags">Tags</label>
                   <input
                     type="text"
                     id="character-tags"
@@ -239,7 +293,7 @@
                 </div>
 
                 <div class="form-group">
-              <label for="character-creator">Creator (Optional)</label>
+                  <label for="character-creator">Creator</label>
                   <input
                     type="text"
                     id="character-creator"
@@ -248,7 +302,7 @@
                 </div>
 
                 <div class="form-group">
-              <label for="character-version">Character Version (Optional)</label>
+                  <label for="character-version">Character Version</label>
                   <input
                     type="text"
                     id="character-version"
@@ -257,26 +311,28 @@
                 </div>
 
                 <div class="form-group">
-              <label for="character-creator-notes">Creator Notes (Optional)</label>
+                  <label for="character-creator-notes">Creator Notes</label>
                   <textarea
                     id="character-creator-notes"
                     placeholder="Notes from the creator..."
                     rows="2"
                   ></textarea>
                 </div>
+              </div>
+            </div>
 
             <div id="character-message" class="validation-message"></div>
 
-            <button type="submit" id="save-character-btn" class="btn-primary">
+            <div style="display: flex; gap: 8px;">
+              <button type="submit" id="save-character-btn" class="btn-primary" style="flex: 1;">
                 Save Character
               </button>
               <button type="button" id="delete-character-btn" class="btn-danger">
-              Delete Character
+                Delete
               </button>
+            </div>
 
-            <div class="form-group" style="margin-top: 1rem; padding-top: 1rem; border-top: 1px solid var(--border-color);">
+            <div style="display: flex; gap: 8px;">
-              <label>Character Card Import/Export</label>
-              <div style="display: flex; gap: 0.5rem;">
               <button type="button" id="import-character-btn" class="btn-secondary" style="flex: 1;">
                 Import v2 Card
               </button>
@@ -284,7 +340,6 @@
                 Export v2 Card
               </button>
             </div>
-            </div>
           </form>
         </div>
       </div>

src/main.js

@@ -821,14 +821,16 @@ function setStatus(text, type = 'default') {
 
 // Show/hide settings
 async function showSettings() {
-  settingsPanel.style.display = 'block';
+  const overlay = document.getElementById('settings-overlay');
-  chatView.style.display = 'none';
+  settingsPanel.classList.add('open');
+  overlay.classList.add('show');
   await loadCharacterSettings();
 }
 
 function hideSettings() {
-  settingsPanel.style.display = 'none';
+  const overlay = document.getElementById('settings-overlay');
-  chatView.style.display = 'flex';
+  settingsPanel.classList.remove('open');
+  overlay.classList.remove('show');
 }
 
 // Tab switching
@@ -1015,6 +1017,7 @@ function handleAvatarRemove() {
 function setupAppControls() {
   document.getElementById('settings-btn').addEventListener('click', showSettings);
   document.getElementById('close-settings-btn').addEventListener('click', hideSettings);
+  document.getElementById('settings-overlay').addEventListener('click', hideSettings);
   document.getElementById('clear-btn').addEventListener('click', clearHistory);
   characterSelect.addEventListener('change', handleCharacterSwitch);
   newCharacterBtn.addEventListener('click', handleNewCharacter);
@@ -1028,6 +1031,14 @@ function setupAppControls() {
   document.getElementById('remove-avatar-btn').addEventListener('click', handleAvatarRemove);
   document.getElementById('import-character-btn').addEventListener('click', handleImportCharacter);
   document.getElementById('export-character-btn').addEventListener('click', handleExportCharacter);
+
+  // Setup collapsible sections
+  document.querySelectorAll('.settings-section-header').forEach(header => {
+    header.addEventListener('click', () => {
+      const section = header.parentElement;
+      section.classList.toggle('collapsed');
+    });
+  });
 }
 
 // Keyboard shortcuts

src/styles.css

@@ -832,28 +832,56 @@ body {
   }
 }
 
-/* Settings Panel */
+/* Settings Panel - Slide-in Sidebar */
 .settings-panel {
-  position: absolute;
+  position: fixed;
+  top: 0;
+  right: -500px;
+  width: 500px;
+  height: 100vh;
+  background: var(--bg-primary);
+  border-left: 1px solid var(--border);
+  box-shadow: -4px 0 20px rgba(0, 0, 0, 0.3);
+  z-index: 1000;
+  overflow-y: auto;
+  padding: 20px;
+  transition: right 0.3s ease;
+}
+
+.settings-panel.open {
+  right: 0;
+}
+
+/* Settings overlay backdrop */
+.settings-overlay {
+  position: fixed;
   top: 0;
   left: 0;
   right: 0;
   bottom: 0;
-  background: var(--bg-primary);
+  background: rgba(0, 0, 0, 0.5);
-  z-index: 1000;
+  z-index: 999;
-  overflow-y: auto;
+  opacity: 0;
-  padding: 60px 20px 20px;
+  pointer-events: none;
+  transition: opacity 0.3s ease;
+}
+
+.settings-overlay.show {
+  opacity: 1;
+  pointer-events: auto;
 }
 
 .settings-header {
   display: flex;
   justify-content: space-between;
   align-items: center;
-  margin-bottom: 20px;
+  margin-bottom: 24px;
+  padding-bottom: 16px;
+  border-bottom: 1px solid var(--border);
 }
 
 .settings-header h2 {
-  font-size: 20px;
+  font-size: 24px;
   font-weight: 600;
   color: var(--text-primary);
   margin: 0;
@@ -863,9 +891,6 @@ body {
   display: flex;
   gap: 8px;
   margin-bottom: 24px;
-  max-width: 400px;
-  margin-left: auto;
-  margin-right: auto;
 }
 
 .tab-btn {
@@ -902,13 +927,68 @@ body {
 }
 
 .settings-form {
-  max-width: 400px;
-  margin: 0 auto;
   display: flex;
   flex-direction: column;
   gap: 20px;
 }
 
+/* Collapsible sections */
+.settings-section {
+  border: 1px solid var(--border);
+  border-radius: 8px;
+  overflow: hidden;
+  background: var(--bg-secondary);
+}
+
+.settings-section-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  padding: 12px 16px;
+  background: var(--bg-tertiary);
+  cursor: pointer;
+  user-select: none;
+  transition: background 0.2s ease;
+}
+
+.settings-section-header:hover {
+  background: var(--border);
+}
+
+.settings-section-title {
+  font-size: 14px;
+  font-weight: 600;
+  color: var(--text-primary);
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+
+.settings-section-icon {
+  width: 16px;
+  height: 16px;
+  transition: transform 0.2s ease;
+}
+
+.settings-section.collapsed .settings-section-icon {
+  transform: rotate(-90deg);
+}
+
+.settings-section-content {
+  padding: 16px;
+  display: flex;
+  flex-direction: column;
+  gap: 16px;
+  max-height: 2000px;
+  overflow: hidden;
+  transition: max-height 0.3s ease, padding 0.3s ease;
+}
+
+.settings-section.collapsed .settings-section-content {
+  max-height: 0;
+  padding: 0 16px;
+}
+
 .form-group {
   display: flex;
   flex-direction: column;
@@ -1095,6 +1175,11 @@ body {
   }
 
   .settings-panel {
-    padding: 60px 16px 16px;
+    width: 100%;
+    right: -100%;
+  }
+
+  .settings-panel.open {
+    right: 0;
   }
 }