fix: Redesign UI to match DeepSeek chat style

- Clean white/light gray background (not dark)
- Centered layout with proper sidebar
- All settings VISIBLE and accessible:
- Model selector in header
- Temperature slider
- Max tokens setting
- Storage mode indicator (Local/HF Hub/Bucket)
- Theme toggle (light/dark)
- Export buttons
- Left sidebar with New Chat, history, file explorer
- Clean message bubbles (user right, AI left)
- Code blocks with syntax styling
- Professional typography and spacing
- Responsive design for all screen sizes

index.html

@@ -7,66 +7,58 @@
 <meta name="description" content="AI-powered code agent with MCP support, multiple 1B models, and Gemini CLI patterns">
 <link rel="preconnect" href="https://fonts.googleapis.com">
 <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
-<link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@300;400;500;600;700&family=Inter:wght@300;400;500;600;700&display=swap" rel="stylesheet">
+<link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600&family=Inter:wght@400;500;600;700&display=swap" rel="stylesheet">
 <style>
 /* ═══════════════════════════════════════════════════════
-   SONICODER V2 - FUTURISTIC UI DESIGN SYSTEM
-   Premium AI Code Agent Interface
+   SONICODER V2 - DEEPSEEK-STYLE CLEAN UI
+   Professional AI Code Agent Interface
    ═══════════════════════════════════════════════════════ */
 
-/* ═══ CSS VARIABLES & DESIGN TOKENS ═══ */
+/* ═══ CSS VARIABLES - LIGHT THEME ═══ */
 :root {
   /* Core Colors */
-  --bg-deep: #050810;
-  --bg-primary: #0a0e17;
-  --bg-secondary: #0d1321;
-  --bg-tertiary: #111827;
-  --bg-elevated: #151d2e;
+  --bg-primary: #ffffff;
+  --bg-secondary: #f7f8fa;
+  --bg-tertiary: #f0f1f3;
+  --bg-elevated: #ffffff;
+  --bg-hover: #eef0f3;
   
-  /* Glass Effect Colors */
-  --glass-bg: rgba(15, 23, 42, 0.65);
-  --glass-bg-light: rgba(20, 30, 50, 0.5);
-  --glass-border: rgba(100, 180, 255, 0.12);
-  --glass-border-hover: rgba(0, 212, 255, 0.25);
-  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
-  
-  /* Accent Colors - Neon */
-  --cyan: #00d4ff;
-  --cyan-bright: #5eeaff;
-  --cyan-dim: #007a94;
-  --cyan-glow: rgba(0, 212, 255, 0.4);
-  --cyan-glow-subtle: rgba(0, 212, 255, 0.15);
-  
-  --purple: #a855f7;
-  --purple-bright: #c084fc;
-  --purple-dim: #7c3aed;
-  --purple-glow: rgba(168, 85, 247, 0.4);
-  --purple-glow-subtle: rgba(168, 85, 247, 0.15);
-  
-  --green: #39ff14;
-  --green-dim: #22c55e;
-  --green-glow: rgba(57, 255, 20, 0.35);
+  /* Text Colors */
+  --text-primary: #1a1a1a;
+  --text-secondary: #666666;
+  --text-muted: #999999;
+  --text-accent: #4d6bfe;
   
-  --amber: #ffb300;
-  --amber-glow: rgba(255, 179, 0, 0.3);
+  /* Accent Color (DeepSeek-like blue) */
+  --accent: #4d6bfe;
+  --accent-hover: #3b5ae6;
+  --accent-light: rgba(77, 107, 254, 0.08);
+  --accent-border: rgba(77, 107, 254, 0.2);
   
-  --red: #ff5555;
-  --red-glow: rgba(255, 85, 85, 0.3);
+  /* Border Colors */
+  --border-light: #e5e5e5;
+  --border-default: #d9d9d9;
+  --border-focus: var(--accent);
   
-  /* Text Colors */
-  --text-primary: #f1f5f9;
-  --text-secondary: #94a3b8;
-  --text-muted: #64748b;
-  --text-accent: var(--cyan);
+  /* Status Colors */
+  --success: #22c55e;
+  --success-bg: rgba(34, 197, 94, 0.1);
+  --error: #ef4444;
+  --error-bg: rgba(239, 68, 68, 0.1);
+  --warning: #f59e0b;
+  --warning-bg: rgba(245, 158, 11, 0.1);
+  --info: #4d6bfe;
+  --info-bg: rgba(77, 107, 254, 0.1);
   
-  /* Border Colors */
-  --border-default: rgba(71, 85, 105, 0.3);
-  --border-focus: var(--cyan);
-  --border-glow: 0 0 0 1px var(--cyan), 0 0 20px var(--cyan-glow);
+  /* Message Bubble Colors */
+  --user-bubble: #4d6bfe;
+  --user-bubble-text: #ffffff;
+  --ai-bubble: #f0f0f0;
+  --ai-bubble-text: #1a1a1a;
   
   /* Typography */
   --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
-  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
+  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
   
   /* Spacing & Sizing */
   --radius-sm: 6px;
@@ -74,13 +66,17 @@
   --radius-lg: 16px;
   --radius-xl: 24px;
   --header-height: 56px;
-  --sidebar-width: 260px;
+  --sidebar-width: 280px;
   
   /* Transitions */
-  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
-  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
-  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
-  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
+  --transition-fast: 150ms ease;
+  --transition-base: 200ms ease;
+  --transition-slow: 300ms ease;
+  
+  /* Shadows */
+  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
+  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
+  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
   
   /* Z-Index Scale */
   --z-base: 1;
@@ -90,6 +86,30 @@
   --z-toast: 2000;
 }
 
+/* Dark Theme Variables */
+[data-theme="dark"] {
+  --bg-primary: #1a1a1a;
+  --bg-secondary: #202020;
+  --bg-tertiary: #2a2a2a;
+  --bg-elevated: #262626;
+  --bg-hover: #333333;
+  
+  --text-primary: #f5f5f5;
+  --text-secondary: #a0a0a0;
+  --text-muted: #707070;
+  
+  --user-bubble: #4d6bfe;
+  --ai-bubble: #2a2a2a;
+  --ai-bubble-text: #f5f5f5;
+  
+  --border-light: #333333;
+  --border-default: #404040;
+  
+  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
+  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
+  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.4);
+}
+
 /* ═══ RESET & BASE ═══ */
 *, *::before, *::after {
   box-sizing: border-box;
@@ -104,16 +124,15 @@ html {
 
 body {
   height: 100%;
-  background: var(--bg-deep);
+  background: var(--bg-primary);
   color: var(--text-primary);
   font-family: var(--font-sans);
   line-height: 1.6;
   overflow: hidden;
-  position: relative;
 }
 
 ::selection {
-  background: var(--cyan-glow);
+  background: var(--accent);
   color: white;
 }
 
@@ -129,103 +148,10 @@ body {
 ::-webkit-scrollbar-thumb {
   background: var(--border-default);
   border-radius: 3px;
-  transition: background var(--transition-fast);
 }
 
 ::-webkit-scrollbar-thumb:hover {
-  background: var(--cyan-dim);
-}
-
-/* ═══ ANIMATED BACKGROUND SYSTEM ═══ */
-.bg-canvas {
-  position: fixed;
-  inset: 0;
-  z-index: 0;
-  overflow: hidden;
-  pointer-events: none;
-}
-
-.bg-gradient-mesh {
-  position: absolute;
-  inset: 0;
-  background: 
-    radial-gradient(ellipse 80% 60% at 20% 10%, rgba(0, 212, 255, 0.08) 0%, transparent 50%),
-    radial-gradient(ellipse 60% 80% at 80% 90%, rgba(168, 85, 247, 0.06) 0%, transparent 50%),
-    radial-gradient(ellipse 50% 50% at 50% 50%, rgba(57, 255, 20, 0.03) 0%, transparent 60%);
-  animation: meshFloat 20s ease-in-out infinite alternate;
-}
-
-@keyframes meshFloat {
-  0% { transform: scale(1) rotate(0deg); opacity: 1; }
-  50% { transform: scale(1.1) rotate(1deg); opacity: 0.9; }
-  100% { transform: scale(1) rotate(-1deg); opacity: 1; }
-}
-
-.particles-container {
-  position: absolute;
-  inset: 0;
-}
-
-.particle {
-  position: absolute;
-  width: 2px;
-  height: 2px;
-  background: var(--cyan);
-  border-radius: 50%;
-  box-shadow: 0 0 6px var(--cyan-glow), 0 0 12px var(--cyan-glow-subtle);
-  opacity: 0;
-  animation: particleFloat linear infinite;
-}
-
-.particle:nth-child(odd) {
-  background: var(--purple);
-  box-shadow: 0 0 6px var(--purple-glow), 0 0 12px var(--purple-glow-subtle);
-}
-
-@keyframes particleFloat {
-  0% { 
-    opacity: 0; 
-    transform: translateY(100vh) scale(0);
-  }
-  10% {
-    opacity: 0.6;
-    transform: translateY(90vh) scale(1);
-  }
-  90% {
-    opacity: 0.6;
-    transform: translateY(10vh) scale(1);
-  }
-  100% { 
-    opacity: 0; 
-    transform: translateY(-10vh) scale(0);
-  }
-}
-
-.grid-overlay {
-  position: absolute;
-  inset: 0;
-  background-image: 
-    linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
-    linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
-  background-size: 50px 50px;
-  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
-  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
-}
-
-.scanline {
-  position: absolute;
-  top: 0;
-  left: 0;
-  right: 0;
-  height: 2px;
-  background: linear-gradient(90deg, transparent, var(--cyan-glow-subtle), transparent);
-  animation: scanlineMove 8s linear infinite;
-  opacity: 0.5;
-}
-
-@keyframes scanlineMove {
-  0% { top: -2px; }
-  100% { top: 100%; }
+  background: var(--text-muted);
 }
 
 /* ═══ MAIN LAYOUT ═══ */
@@ -244,25 +170,13 @@ body {
   display: flex;
   align-items: center;
   justify-content: space-between;
-  padding: 0 16px;
-  background: var(--glass-bg);
-  backdrop-filter: blur(20px);
-  -webkit-backdrop-filter: blur(20px);
-  border-bottom: 1px solid var(--glass-border);
+  padding: 0 20px;
+  background: var(--bg-secondary);
+  border-bottom: 1px solid var(--border-light);
   position: relative;
   z-index: var(--z-panel);
 }
 
-.header::before {
-  content: '';
-  position: absolute;
-  bottom: 0;
-  left: 0;
-  right: 0;
-  height: 1px;
-  background: linear-gradient(90deg, transparent, var(--cyan-glow-subtle), var(--purple-glow-subtle), transparent);
-}
-
 .header-left {
   display: flex;
   align-items: center;
@@ -274,46 +188,24 @@ body {
   align-items: center;
   gap: 10px;
   cursor: pointer;
-  transition: transform var(--transition-fast);
+  transition: opacity var(--transition-fast);
 }
 
 .logo:hover {
-  transform: scale(1.02);
+  opacity: 0.85;
 }
 
 .logo-icon {
-  width: 36px;
-  height: 36px;
-  background: linear-gradient(135deg, var(--cyan), var(--purple));
+  width: 32px;
+  height: 32px;
+  background: linear-gradient(135deg, var(--accent), #6366f1);
   border-radius: var(--radius-md);
   display: flex;
   align-items: center;
   justify-content: center;
-  font-size: 18px;
+  font-size: 16px;
   font-weight: 700;
   color: white;
-  box-shadow: 0 4px 15px var(--cyan-glow), 0 0 30px var(--purple-glow-subtle);
-  animation: logoPulse 3s ease-in-out infinite;
-  position: relative;
-  overflow: hidden;
-}
-
-.logo-icon::after {
-  content: '';
-  position: absolute;
-  inset: -50%;
-  background: conic-gradient(from 0deg, transparent, rgba(255,255,255,0.3), transparent);
-  animation: logoShine 4s linear infinite;
-}
-
-@keyframes logoPulse {
-  0%, 100% { box-shadow: 0 4px 15px var(--cyan-glow), 0 0 30px var(--purple-glow-subtle); }
-  50% { box-shadow: 0 4px 25px var(--cyan-glow), 0 0 40px var(--purple-glow); }
-}
-
-@keyframes logoShine {
-  from { transform: rotate(0deg); }
-  to { transform: rotate(360deg); }
 }
 
 .logo-text {
@@ -323,20 +215,17 @@ body {
 }
 
 .logo-title {
-  font-size: 16px;
+  font-size: 15px;
   font-weight: 700;
-  letter-spacing: -0.5px;
-  background: linear-gradient(135deg, var(--text-primary), var(--cyan-bright));
-  -webkit-background-clip: text;
-  -webkit-text-fill-color: transparent;
-  background-clip: text;
+  color: var(--text-primary);
+  letter-spacing: -0.3px;
 }
 
 .logo-version {
   font-size: 10px;
   color: var(--text-muted);
   text-transform: uppercase;
-  letter-spacing: 1px;
+  letter-spacing: 0.5px;
   font-weight: 500;
 }
 
@@ -344,25 +233,66 @@ body {
   display: flex;
   align-items: center;
   gap: 12px;
+  flex: 1;
+  justify-content: center;
+  max-width: 600px;
+  margin: 0 20px;
+}
+
+.search-bar {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  width: 100%;
+  max-width: 400px;
+  padding: 8px 14px;
+  background: var(--bg-primary);
+  border: 1px solid var(--border-light);
+  border-radius: var(--radius-xl);
+  transition: all var(--transition-fast);
+}
+
+.search-bar:focus-within {
+  border-color: var(--accent);
+  box-shadow: 0 0 0 3px var(--accent-light);
+}
+
+.search-bar input {
+  flex: 1;
+  border: none;
+  outline: none;
+  background: transparent;
+  font-size: 13px;
+  color: var(--text-primary);
+  font-family: var(--font-sans);
+}
+
+.search-bar input::placeholder {
+  color: var(--text-muted);
+}
+
+.search-bar .search-icon {
+  color: var(--text-muted);
+  font-size: 14px;
 }
 
 .model-selector {
   display: flex;
   align-items: center;
   gap: 8px;
-  padding: 6px 14px;
-  background: var(--glass-bg-light);
-  border: 1px solid var(--glass-border);
+  padding: 7px 14px;
+  background: var(--bg-primary);
+  border: 1px solid var(--border-light);
   border-radius: var(--radius-xl);
   cursor: pointer;
   transition: all var(--transition-fast);
+  white-space: nowrap;
   position: relative;
-  overflow: hidden;
 }
 
 .model-selector:hover {
-  border-color: var(--glass-border-hover);
-  box-shadow: 0 0 20px var(--cyan-glow-subtle);
+  border-color: var(--accent);
+  background: var(--accent-light);
 }
 
 .model-dot {
@@ -374,39 +304,72 @@ body {
 }
 
 .model-dot.ready {
-  background: var(--green);
-  box-shadow: 0 0 8px var(--green-glow);
-  animation: dotPulse 2s ease-in-out infinite;
+  background: var(--success);
 }
 
 .model-dot.loading {
-  background: var(--amber);
-  animation: dotSpin 1s linear infinite;
+  background: var(--warning);
+  animation: spin 1s linear infinite;
 }
 
 .model-dot.error {
-  background: var(--red);
-  box-shadow: 0 0 8px var(--red-glow);
-}
-
-@keyframes dotPulse {
-  0%, 100% { transform: scale(1); opacity: 1; }
-  50% { transform: scale(1.2); opacity: 0.7; }
+  background: var(--error);
 }
 
-@keyframes dotSpin {
-  0% { transform: rotate(0deg); }
-  100% { transform: rotate(360deg); }
+@keyframes spin {
+  to { transform: rotate(360deg); }
 }
 
 .model-text {
-  font-size: 12px;
+  font-size: 13px;
   font-weight: 500;
   color: var(--text-secondary);
-  max-width: 120px;
+}
+
+.model-dropdown {
+  position: absolute;
+  top: calc(100% + 4px);
+  left: 0;
+  right: 0;
+  background: var(--bg-elevated);
+  border: 1px solid var(--border-light);
+  border-radius: var(--radius-md);
+  box-shadow: var(--shadow-lg);
+  z-index: var(--z-modal);
+  display: none;
   overflow: hidden;
-  text-overflow: ellipsis;
-  white-space: nowrap;
+}
+
+.model-dropdown.show {
+  display: block;
+}
+
+.model-option {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  padding: 10px 14px;
+  cursor: pointer;
+  transition: background var(--transition-fast);
+}
+
+.model-option:hover {
+  background: var(--bg-hover);
+}
+
+.model-option.active {
+  background: var(--accent-light);
+  color: var(--accent);
+}
+
+.model-option .model-name {
+  font-weight: 500;
+  font-size: 13px;
+}
+
+.model-option .model-desc {
+  font-size: 11px;
+  color: var(--text-muted);
 }
 
 .header-right {
@@ -425,17 +388,18 @@ body {
   display: flex;
   align-items: center;
   gap: 6px;
-  padding: 5px 12px;
-  background: var(--glass-bg-light);
-  border: 1px solid var(--glass-border);
+  padding: 6px 12px;
+  background: var(--bg-primary);
+  border: 1px solid var(--border-light);
   border-radius: var(--radius-xl);
-  font-size: 11px;
+  font-size: 12px;
   font-weight: 500;
+  color: var(--text-secondary);
   transition: all var(--transition-fast);
 }
 
 .status-pill:hover {
-  border-color: var(--glass-border-hover);
+  border-color: var(--border-default);
 }
 
 .status-pill .dot {
@@ -447,44 +411,57 @@ body {
 
 .status-pill .dot.connected,
 .status-pill .dot.ready {
-  background: var(--green);
-  box-shadow: 0 0 6px var(--green-glow);
+  background: var(--success);
 }
 
-.status-pill .dot.disconnected {
-  background: var(--red);
+.status-pill .dot.disconnected,
+.status-pill .dot.error {
+  background: var(--error);
 }
 
 .status-pill .dot.loading {
-  background: var(--amber);
-  animation: dotSpin 1s linear infinite;
+  background: var(--warning);
+  animation: spin 1s linear infinite;
 }
 
 .btn-icon {
-  width: 34px;
-  height: 34px;
+  width: 36px;
+  height: 36px;
   display: flex;
   align-items: center;
   justify-content: center;
-  background: var(--glass-bg-light);
-  border: 1px solid var(--glass-border);
+  background: var(--bg-primary);
+  border: 1px solid var(--border-light);
   border-radius: var(--radius-md);
   color: var(--text-secondary);
   cursor: pointer;
   transition: all var(--transition-fast);
-  font-size: 14px;
+  font-size: 15px;
 }
 
 .btn-icon:hover {
-  background: var(--glass-bg);
-  border-color: var(--cyan-dim);
-  color: var(--cyan);
-  box-shadow: 0 0 15px var(--cyan-glow-subtle);
-  transform: translateY(-1px);
+  background: var(--bg-hover);
+  border-color: var(--border-default);
+  color: var(--text-primary);
 }
 
-.btn-icon:active {
-  transform: translateY(0);
+.user-avatar {
+  width: 32px;
+  height: 32px;
+  border-radius: 50%;
+  background: linear-gradient(135deg, var(--accent), #8b5cf6);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  color: white;
+  font-size: 13px;
+  font-weight: 600;
+  cursor: pointer;
+  transition: transform var(--transition-fast);
+}
+
+.user-avatar:hover {
+  transform: scale(1.05);
 }
 
 /* ═══ MAIN CONTENT AREA ═══ */
@@ -499,10 +476,8 @@ body {
 .sidebar {
   width: var(--sidebar-width);
   min-width: var(--sidebar-width);
-  background: var(--glass-bg);
-  backdrop-filter: blur(20px);
-  -webkit-backdrop-filter: blur(20px);
-  border-right: 1px solid var(--glass-border);
+  background: var(--bg-secondary);
+  border-right: 1px solid var(--border-light);
   display: flex;
   flex-direction: column;
   overflow: hidden;
@@ -510,56 +485,103 @@ body {
   z-index: var(--z-panel);
 }
 
-.sidebar::before {
-  content: '';
-  position: absolute;
-  top: 0;
-  right: 0;
-  bottom: 0;
-  width: 1px;
-  background: linear-gradient(180deg, var(--cyan-glow-subtle), transparent, var(--purple-glow-subtle));
-  opacity: 0.5;
-}
-
 .sidebar-header {
   padding: 16px;
-  border-bottom: 1px solid var(--glass-border);
+  border-bottom: 1px solid var(--border-light);
+}
+
+.new-chat-btn {
+  width: 100%;
   display: flex;
   align-items: center;
-  justify-content: space-between;
+  justify-content: center;
+  gap: 8px;
+  padding: 12px 20px;
+  background: var(--accent);
+  color: white;
+  border: none;
+  border-radius: var(--radius-md);
+  font-size: 14px;
+  font-weight: 600;
+  font-family: var(--font-sans);
+  cursor: pointer;
+  transition: all var(--transition-fast);
+}
+
+.new-chat-btn:hover {
+  background: var(--accent-hover);
+  transform: translateY(-1px);
+  box-shadow: var(--shadow-md);
+}
+
+.new-chat-btn:active {
+  transform: translateY(0);
+}
+
+.sidebar-section {
+  padding: 16px;
+  border-bottom: 1px solid var(--border-light);
 }
 
-.sidebar-title {
+.sidebar-section-title {
   font-size: 11px;
   font-weight: 600;
   text-transform: uppercase;
-  letter-spacing: 1.5px;
+  letter-spacing: 0.8px;
   color: var(--text-muted);
+  padding: 0 4px 10px;
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
 }
 
-.sidebar-actions {
+.chat-history-list {
   display: flex;
-  gap: 4px;
+  flex-direction: column;
+  gap: 2px;
+  max-height: 200px;
+  overflow-y: auto;
 }
 
-.btn-sidebar-action {
-  width: 24px;
-  height: 24px;
+.chat-history-item {
   display: flex;
   align-items: center;
-  justify-content: center;
-  background: transparent;
-  border: none;
+  gap: 10px;
+  padding: 10px 12px;
   border-radius: var(--radius-sm);
-  color: var(--text-muted);
   cursor: pointer;
   transition: all var(--transition-fast);
-  font-size: 12px;
+  color: var(--text-secondary);
+  font-size: 13px;
+}
+
+.chat-history-item:hover {
+  background: var(--bg-hover);
+  color: var(--text-primary);
+}
+
+.chat-history-item.active {
+  background: var(--accent-light);
+  color: var(--accent);
+}
+
+.chat-history-item .chat-icon {
+  font-size: 14px;
+  opacity: 0.7;
+}
+
+.chat-history-item .chat-title {
+  flex: 1;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
 }
 
-.btn-sidebar-action:hover {
-  background: var(--glass-bg-light);
-  color: var(--cyan);
+.chat-history-empty {
+  padding: 20px 12px;
+  text-align: center;
+  color: var(--text-muted);
+  font-size: 12px;
 }
 
 .sidebar-content {
@@ -591,20 +613,19 @@ body {
 }
 
 .ws-dir-name:hover {
-  background: var(--glass-bg-light);
-  color: var(--cyan);
+  background: var(--bg-hover);
+  color: var(--text-primary);
 }
 
-.ws-dir-name::before {
-  content: '📁';
-  font-size: 11px;
-  filter: grayscale(0.3);
+.ws-dir-name .dir-icon {
+  font-size: 12px;
+  color: var(--text-muted);
 }
 
 .ws-children {
   margin-left: 16px;
   padding-left: 12px;
-  border-left: 1px solid var(--border-default);
+  border-left: 1px solid var(--border-light);
 }
 
 .ws-file {
@@ -624,14 +645,14 @@ body {
 }
 
 .ws-file > span:hover {
-  background: var(--glass-bg-light);
-  color: var(--cyan-bright);
+  background: var(--bg-hover);
+  color: var(--accent);
   padding-left: 12px;
 }
 
-.ws-file > span::before {
-  content: '📄';
+.ws-file > span .file-icon {
   font-size: 11px;
+  color: var(--text-muted);
 }
 
 .ws-empty {
@@ -647,14 +668,14 @@ body {
   align-items: center;
   gap: 12px;
   padding: 12px;
-  background: var(--glass-bg-light);
-  border-bottom: 1px solid var(--glass-border);
+  background: var(--bg-tertiary);
+  border-bottom: 1px solid var(--border-light);
 }
 
 .file-viewer-header button {
   padding: 6px 12px;
-  background: var(--glass-bg);
-  border: 1px solid var(--glass-border);
+  background: var(--bg-primary);
+  border: 1px solid var(--border-light);
   border-radius: var(--radius-sm);
   color: var(--text-secondary);
   cursor: pointer;
@@ -664,8 +685,8 @@ body {
 }
 
 .file-viewer-header button:hover {
-  border-color: var(--cyan-dim);
-  color: var(--cyan);
+  border-color: var(--accent);
+  color: var(--accent);
 }
 
 .file-viewer-header span {
@@ -687,35 +708,18 @@ body {
   word-break: break-all;
 }
 
-/* Sidebar Sections */
-.sidebar-section {
-  margin-bottom: 16px;
-}
-
-.sidebar-section-title {
-  font-size: 10px;
-  font-weight: 600;
-  text-transform: uppercase;
-  letter-spacing: 1px;
-  color: var(--text-muted);
-  padding: 8px 12px 6px;
-  display: flex;
-  align-items: center;
-  gap: 6px;
-}
-
 /* MCP Section */
 .mcp-server {
   padding: 10px 12px;
-  background: var(--glass-bg-light);
-  border: 1px solid var(--glass-border);
+  background: var(--bg-primary);
+  border: 1px solid var(--border-light);
   border-radius: var(--radius-md);
   margin-bottom: 8px;
   transition: all var(--transition-fast);
 }
 
 .mcp-server:hover {
-  border-color: var(--glass-border-hover);
+  border-color: var(--border-default);
 }
 
 .mcp-server-header {
@@ -733,12 +737,11 @@ body {
 }
 
 .mcp-server-dot.connected {
-  background: var(--green);
-  box-shadow: 0 0 6px var(--green-glow);
+  background: var(--success);
 }
 
 .mcp-server-dot.disconnected {
-  background: var(--red);
+  background: var(--error);
 }
 
 .mcp-server-name {
@@ -758,24 +761,18 @@ body {
 }
 
 .tool-badge.success {
-  background: rgba(57, 255, 20, 0.15);
-  color: var(--green);
+  background: var(--success-bg);
+  color: var(--success);
 }
 
 .tool-badge.error {
-  background: rgba(255, 85, 85, 0.15);
-  color: var(--red);
+  background: var(--error-bg);
+  color: var(--error);
 }
 
 .tool-badge.running {
-  background: rgba(255, 179, 0, 0.15);
-  color: var(--amber);
-  animation: badgePulse 1.5s ease-in-out infinite;
-}
-
-@keyframes badgePulse {
-  0%, 100% { opacity: 1; }
-  50% { opacity: 0.6; }
+  background: var(--warning-bg);
+  color: var(--warning);
 }
 
 .mcp-tools {
@@ -800,6 +797,272 @@ body {
   line-height: 1.6;
 }
 
+/* Sidebar Footer / Settings */
+.sidebar-footer {
+  padding: 12px 16px;
+  border-top: 1px solid var(--border-light);
+  background: var(--bg-secondary);
+}
+
+.sidebar-footer-actions {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+}
+
+.storage-mode {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  font-size: 11px;
+  color: var(--text-muted);
+  padding: 4px 8px;
+  background: var(--bg-primary);
+  border-radius: var(--radius-sm);
+}
+
+.storage-mode .storage-dot {
+  width: 6px;
+  height: 6px;
+  border-radius: 50%;
+  background: var(--success);
+}
+
+.storage-mode.hf-hub .storage-dot {
+  background: var(--accent);
+}
+
+.storage-mode.bucket .storage-dot {
+  background: var(--warning);
+}
+
+.settings-btn {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 32px;
+  height: 32px;
+  background: var(--bg-primary);
+  border: 1px solid var(--border-light);
+  border-radius: var(--radius-sm);
+  color: var(--text-muted);
+  cursor: pointer;
+  transition: all var(--transition-fast);
+  font-size: 14px;
+}
+
+.settings-btn:hover {
+  border-color: var(--accent);
+  color: var(--accent);
+}
+
+/* Settings Panel */
+.settings-panel {
+  position: fixed;
+  bottom: 60px;
+  left: 280px;
+  width: 320px;
+  background: var(--bg-elevated);
+  border: 1px solid var(--border-light);
+  border-radius: var(--radius-lg);
+  box-shadow: var(--shadow-lg);
+  z-index: var(--z-modal);
+  display: none;
+  overflow: hidden;
+}
+
+.settings-panel.show {
+  display: block;
+  animation: slideUp 0.2s ease-out;
+}
+
+@keyframes slideUp {
+  from {
+    opacity: 0;
+    transform: translateY(10px);
+  }
+  to {
+    opacity: 1;
+    transform: translateY(0);
+  }
+}
+
+.settings-panel-header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 14px 16px;
+  border-bottom: 1px solid var(--border-light);
+}
+
+.settings-panel-title {
+  font-size: 14px;
+  font-weight: 600;
+  color: var(--text-primary);
+}
+
+.settings-close-btn {
+  width: 28px;
+  height: 28px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  background: transparent;
+  border: none;
+  border-radius: var(--radius-sm);
+  color: var(--text-muted);
+  cursor: pointer;
+  font-size: 16px;
+  transition: all var(--transition-fast);
+}
+
+.settings-close-btn:hover {
+  background: var(--bg-hover);
+  color: var(--text-primary);
+}
+
+.settings-panel-body {
+  padding: 16px;
+  display: flex;
+  flex-direction: column;
+  gap: 16px;
+  max-height: 400px;
+  overflow-y: auto;
+}
+
+.setting-group {
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+}
+
+.setting-label {
+  font-size: 12px;
+  font-weight: 500;
+  color: var(--text-secondary);
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+}
+
+.setting-value {
+  font-size: 11px;
+  color: var(--text-muted);
+  font-family: var(--font-mono);
+}
+
+.setting-select {
+  width: 100%;
+  padding: 10px 12px;
+  background: var(--bg-primary);
+  border: 1px solid var(--border-light);
+  border-radius: var(--radius-sm);
+  color: var(--text-primary);
+  font-size: 13px;
+  font-family: var(--font-sans);
+  cursor: pointer;
+  transition: all var(--transition-fast);
+  appearance: none;
+  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23999' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
+  background-repeat: no-repeat;
+  background-position: right 12px center;
+  padding-right: 32px;
+}
+
+.setting-select:focus {
+  border-color: var(--accent);
+  box-shadow: 0 0 0 3px var(--accent-light);
+  outline: none;
+}
+
+.setting-slider {
+  width: 100%;
+  height: 6px;
+  border-radius: 3px;
+  background: var(--bg-tertiary);
+  appearance: none;
+  cursor: pointer;
+}
+
+.setting-slider::-webkit-slider-thumb {
+  appearance: none;
+  width: 18px;
+  height: 18px;
+  border-radius: 50%;
+  background: var(--accent);
+  cursor: pointer;
+  transition: transform var(--transition-fast);
+}
+
+.setting-slider::-webkit-slider-thumb:hover {
+  transform: scale(1.1);
+}
+
+.setting-row {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+}
+
+.setting-toggle {
+  position: relative;
+  width: 44px;
+  height: 24px;
+  background: var(--bg-tertiary);
+  border-radius: 12px;
+  cursor: pointer;
+  transition: background var(--transition-fast);
+}
+
+.setting-toggle.active {
+  background: var(--accent);
+}
+
+.setting-toggle::after {
+  content: '';
+  position: absolute;
+  top: 2px;
+  left: 2px;
+  width: 20px;
+  height: 20px;
+  background: white;
+  border-radius: 50%;
+  transition: transform var(--transition-fast);
+  box-shadow: var(--shadow-sm);
+}
+
+.setting-toggle.active::after {
+  transform: translateX(20px);
+}
+
+.export-buttons {
+  display: flex;
+  gap: 8px;
+}
+
+.export-btn {
+  flex: 1;
+  padding: 10px 12px;
+  background: var(--bg-primary);
+  border: 1px solid var(--border-light);
+  border-radius: var(--radius-sm);
+  color: var(--text-secondary);
+  font-size: 12px;
+  font-weight: 500;
+  cursor: pointer;
+  transition: all var(--transition-fast);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 6px;
+}
+
+.export-btn:hover {
+  border-color: var(--accent);
+  color: var(--accent);
+  background: var(--accent-light);
+}
+
 /* ═══ CHAT AREA ═══ */
 .chat-area {
   flex: 1;
@@ -807,6 +1070,7 @@ body {
   flex-direction: column;
   overflow: hidden;
   position: relative;
+  background: var(--bg-primary);
 }
 
 .chat-messages {
@@ -822,137 +1086,72 @@ body {
 
 /* Welcome Banner */
 .welcome-banner {
-  max-width: 600px;
-  margin: 40px auto;
+  max-width: 680px;
+  margin: 60px auto;
   text-align: center;
-  padding: 40px;
-  background: var(--glass-bg);
-  backdrop-filter: blur(20px);
-  -webkit-backdrop-filter: blur(20px);
-  border: 1px solid var(--glass-border);
-  border-radius: var(--radius-xl);
-  position: relative;
-  overflow: hidden;
-}
-
-.welcome-banner::before {
-  content: '';
-  position: absolute;
-  top: 0;
-  left: 0;
-  right: 0;
-  height: 1px;
-  background: linear-gradient(90deg, transparent, var(--cyan), var(--purple), transparent);
-}
-
-.welcome-banner::after {
-  content: '';
-  position: absolute;
-  inset: 0;
-  background: radial-gradient(ellipse at center top, var(--cyan-glow-subtle), transparent 70%);
-  pointer-events: none;
+  padding: 48px 40px;
 }
 
-.banner-icon {
-  font-size: 48px;
-  margin-bottom: 16px;
-  display: block;
-  animation: bannerFloat 3s ease-in-out infinite;
-}
-
-@keyframes bannerFloat {
-  0%, 100% { transform: translateY(0); }
-  50% { transform: translateY(-8px); }
-}
-
-.banner-title {
-  font-size: 24px;
-  font-weight: 700;
-  margin-bottom: 8px;
-  background: linear-gradient(135deg, var(--text-primary), var(--cyan-bright), var(--purple-bright));
-  -webkit-background-clip: text;
-  -webkit-text-fill-color: transparent;
-  background-clip: text;
+.welcome-icon {
+  font-size: 56px;
+  margin-bottom: 20px;
+  display: block;
 }
 
-.banner-model {
-  font-size: 13px;
-  color: var(--cyan);
-  margin-bottom: 16px;
-  font-family: var(--font-mono);
+.welcome-title {
+  font-size: 28px;
+  font-weight: 700;
+  color: var(--text-primary);
+  margin-bottom: 12px;
+  letter-spacing: -0.5px;
 }
 
-.banner-desc {
+.welcome-subtitle {
+  font-size: 16px;
   color: var(--text-secondary);
-  font-size: 14px;
-  line-height: 1.7;
-  margin-bottom: 24px;
-}
-
-.examples-row {
-  display: flex;
-  flex-wrap: wrap;
-  gap: 8px;
-  justify-content: center;
+  margin-bottom: 32px;
+  line-height: 1.6;
 }
 
-.examples-label {
-  font-size: 12px;
-  color: var(--text-muted);
-  display: flex;
-  align-items: center;
-  margin-right: 4px;
+.examples-grid {
+  display: grid;
+  grid-template-columns: repeat(2, 1fr);
+  gap: 10px;
+  max-width: 520px;
+  margin: 0 auto;
 }
 
-.example-chip {
-  padding: 8px 14px;
-  background: var(--glass-bg-light);
-  border: 1px solid var(--glass-border);
-  border-radius: var(--radius-xl);
-  font-size: 12px;
+.example-card {
+  padding: 14px 18px;
+  background: var(--bg-secondary);
+  border: 1px solid var(--border-light);
+  border-radius: var(--radius-md);
+  font-size: 13px;
   color: var(--text-secondary);
   cursor: pointer;
   transition: all var(--transition-fast);
-  position: relative;
-  overflow: hidden;
-}
-
-.example-chip::before {
-  content: '';
-  position: absolute;
-  inset: 0;
-  background: linear-gradient(135deg, var(--cyan-glow-subtle), var(--purple-glow-subtle));
-  opacity: 0;
-  transition: opacity var(--transition-fast);
+  text-align: left;
 }
 
-.example-chip:hover {
-  border-color: var(--cyan-dim);
-  color: var(--cyan);
+.example-card:hover {
+  border-color: var(--accent);
+  color: var(--accent);
+  background: var(--accent-light);
   transform: translateY(-2px);
-  box-shadow: 0 4px 20px var(--cyan-glow-subtle);
-}
-
-.example-chip:hover::before {
-  opacity: 1;
-}
-
-.example-chip span {
-  position: relative;
-  z-index: 1;
+  box-shadow: var(--shadow-md);
 }
 
 /* Message Styles */
 .msg {
-  margin-bottom: 20px;
-  animation: msgSlideIn 0.3s ease-out;
+  margin-bottom: 24px;
+  animation: msgSlideIn 0.25s ease-out;
   position: relative;
 }
 
 @keyframes msgSlideIn {
   from {
     opacity: 0;
-    transform: translateY(10px);
+    transform: translateY(8px);
   }
   to {
     opacity: 1;
@@ -967,24 +1166,13 @@ body {
 
 .msg-user .msg-content-wrapper {
   max-width: 75%;
-  background: linear-gradient(135deg, rgba(0, 212, 255, 0.15), rgba(0, 212, 255, 0.05));
-  border: 1px solid rgba(0, 212, 255, 0.2);
+  background: var(--user-bubble);
+  color: var(--user-bubble-text);
   border-radius: var(--radius-lg) var(--radius-lg) 4px var(--radius-lg);
   padding: 14px 18px;
   position: relative;
 }
 
-.msg-user .msg-content-wrapper::before {
-  content: '';
-  position: absolute;
-  top: 0;
-  left: 0;
-  right: 0;
-  height: 1px;
-  background: linear-gradient(90deg, transparent, var(--cyan-glow-subtle), transparent);
-  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
-}
-
 .msg-assistant {
   display: flex;
   justify-content: flex-start;
@@ -992,10 +1180,8 @@ body {
 
 .msg-assistant .msg-content-wrapper {
   max-width: 85%;
-  background: var(--glass-bg);
-  backdrop-filter: blur(10px);
-  -webkit-backdrop-filter: blur(10px);
-  border: 1px solid var(--glass-border);
+  background: var(--ai-bubble);
+  color: var(--ai-bubble-text);
   border-radius: var(--radius-lg) var(--radius-lg) var(--radius-lg) 4px;
   padding: 14px 18px;
   position: relative;
@@ -1008,11 +1194,12 @@ body {
 
 .msg-system .msg-content-wrapper {
   max-width: 80%;
-  background: var(--glass-bg-light);
-  border: 1px dashed var(--glass-border);
+  background: var(--bg-secondary);
+  border: 1px dashed var(--border-default);
   border-radius: var(--radius-md);
   padding: 12px 20px;
   text-align: center;
+  color: var(--text-secondary);
 }
 
 .msg-prefix {
@@ -1021,19 +1208,19 @@ body {
 }
 
 .msg-user .msg-prefix {
-  color: var(--cyan);
+  color: rgba(255,255,255,0.8);
 }
 
 .msg-assistant .msg-prefix {
-  color: var(--purple);
+  color: var(--accent);
 }
 
 .msg-system .msg-prefix {
-  color: var(--amber);
+  color: var(--warning);
 }
 
 .msg-content {
-  color: var(--text-primary);
+  color: inherit;
   line-height: 1.7;
   word-wrap: break-word;
 }
@@ -1047,56 +1234,37 @@ body {
   align-items: center;
   gap: 6px;
   padding: 4px 10px;
-  background: var(--purple-glow-subtle);
-  border: 1px solid var(--purple);
+  background: var(--info-bg);
+  border: 1px solid var(--accent-border);
   border-radius: var(--radius-sm);
-  font-size: 10px;
+  font-size: 11px;
   font-weight: 600;
-  color: var(--purple-bright);
-  text-transform: uppercase;
-  letter-spacing: 0.5px;
+  color: var(--accent);
   margin-bottom: 10px;
-  animation: iterationGlow 2s ease-in-out infinite;
-}
-
-@keyframes iterationGlow {
-  0%, 100% { box-shadow: 0 0 10px var(--purple-glow-subtle); }
-  50% { box-shadow: 0 0 20px var(--purple-glow); }
 }
 
 /* Code Block Styles */
 .code-block-wrap {
   margin: 12px 0;
-  background: var(--bg-deep);
+  background: #1e1e1e;
   border: 1px solid var(--border-default);
   border-radius: var(--radius-md);
   overflow: hidden;
-  position: relative;
-}
-
-.code-block-wrap::before {
-  content: '';
-  position: absolute;
-  top: 0;
-  left: 0;
-  right: 0;
-  height: 1px;
-  background: linear-gradient(90deg, var(--cyan-glow-subtle), var(--purple-glow-subtle));
 }
 
 .code-block-header {
   display: flex;
   align-items: center;
   justify-content: space-between;
-  padding: 8px 12px;
-  background: var(--bg-tertiary);
-  border-bottom: 1px solid var(--border-default);
+  padding: 8px 14px;
+  background: #2d2d2d;
+  border-bottom: 1px solid #3d3d3d;
 }
 
 .code-lang {
   font-size: 11px;
   font-weight: 500;
-  color: var(--cyan);
+  color: #9ca3af;
   text-transform: uppercase;
   letter-spacing: 0.5px;
   font-family: var(--font-mono);
@@ -1104,10 +1272,10 @@ body {
 
 .btn-copy {
   padding: 4px 10px;
-  background: var(--glass-bg-light);
-  border: 1px solid var(--glass-border);
-  border-radius: var(--radius-sm);
-  color: var(--text-muted);
+  background: transparent;
+  border: 1px solid #4a4a4a;
+  border-radius: 4px;
+  color: #9ca3af;
   font-size: 11px;
   cursor: pointer;
   font-family: var(--font-mono);
@@ -1115,15 +1283,14 @@ body {
 }
 
 .btn-copy:hover {
-  border-color: var(--cyan-dim);
-  color: var(--cyan);
-  box-shadow: 0 0 10px var(--cyan-glow-subtle);
+  border-color: var(--accent);
+  color: var(--accent);
 }
 
 .btn-copy.copied {
-  background: rgba(57, 255, 20, 0.15);
-  border-color: var(--green);
-  color: var(--green);
+  background: var(--success-bg);
+  border-color: var(--success);
+  color: var(--success);
 }
 
 .code-block-wrap pre {
@@ -1136,19 +1303,18 @@ body {
   font-family: var(--font-mono);
   font-size: 12px;
   line-height: 1.7;
-  color: var(--code-text, #e0e0e0);
-  --code-text: #e2e8f0;
+  color: #e0e0e0;
 }
 
 /* Inline code */
 .msg-content code:not([id]) {
   padding: 2px 6px;
-  background: var(--bg-deep);
-  border: 1px solid var(--border-default);
+  background: var(--bg-tertiary);
+  border: 1px solid var(--border-light);
   border-radius: 4px;
   font-family: var(--font-mono);
   font-size: 12px;
-  color: var(--cyan-bright);
+  color: var(--accent);
 }
 
 /* Headings in messages */
@@ -1158,8 +1324,8 @@ body {
   color: var(--text-primary);
 }
 
-.msg-content h1 { font-size: 18px; color: var(--cyan-bright); }
-.msg-content h2 { font-size: 16px; color: var(--purple-bright); }
+.msg-content h1 { font-size: 18px; }
+.msg-content h2 { font-size: 16px; }
 .msg-content h3 { font-size: 14px; }
 
 .msg-content strong {
@@ -1168,30 +1334,27 @@ body {
 }
 
 .msg-content em {
-  color: var(--cyan);
+  color: var(--accent);
   font-style: normal;
 }
 
 .msg-content li {
   margin-left: 20px;
   margin-bottom: 4px;
-  list-style: none;
-  position: relative;
+  list-style: disc;
 }
 
-.msg-content li::before {
-  content: '▹';
-  position: absolute;
-  left: -16px;
-  color: var(--cyan);
+.msg-content ul, .msg-content ol {
+  margin: 8px 0;
+  padding-left: 20px;
 }
 
 /* Streaming Cursor */
 .streaming-cursor {
   display: inline-block;
   width: 8px;
-  height: 16px;
-  background: var(--cyan);
+  height: 18px;
+  background: var(--accent);
   margin-left: 2px;
   vertical-align: text-bottom;
   animation: cursorBlink 1s step-end infinite;
@@ -1206,17 +1369,17 @@ body {
 /* Tool Call Block */
 .tool-block {
   margin: 12px 0;
-  background: var(--bg-deep);
-  border: 1px solid var(--border-default);
+  background: var(--bg-secondary);
+  border: 1px solid var(--border-light);
   border-radius: var(--radius-md);
   overflow: hidden;
-  animation: toolSlideIn 0.3s ease-out;
+  animation: toolSlideIn 0.25s ease-out;
 }
 
 @keyframes toolSlideIn {
   from {
     opacity: 0;
-    transform: translateX(-10px);
+    transform: translateX(-8px);
   }
   to {
     opacity: 1;
@@ -1230,17 +1393,17 @@ body {
   gap: 10px;
   padding: 12px 14px;
   background: var(--bg-tertiary);
-  border-bottom: 1px solid var(--border-default);
+  border-bottom: 1px solid var(--border-light);
   cursor: pointer;
   transition: background var(--transition-fast);
 }
 
 .tool-header:hover {
-  background: var(--bg-elevated);
+  background: var(--bg-hover);
 }
 
 .tool-icon {
-  font-size: 16px;
+  font-size: 14px;
 }
 
 .tool-name {
@@ -1258,8 +1421,8 @@ body {
   color: var(--text-muted);
   white-space: pre-wrap;
   word-break: break-all;
-  border-bottom: 1px solid var(--border-default);
-  background: rgba(0, 0, 0, 0.2);
+  border-bottom: 1px solid var(--border-light);
+  background: var(--bg-primary);
 }
 
 .tool-result {
@@ -1274,33 +1437,20 @@ body {
 }
 
 .tool-result.error-output {
-  color: var(--red);
+  color: var(--error);
 }
 
 /* ═══ INPUT AREA ═══ */
 .input-area {
-  padding: 16px 20px;
-  background: var(--glass-bg);
-  backdrop-filter: blur(20px);
-  -webkit-backdrop-filter: blur(20px);
-  border-top: 1px solid var(--glass-border);
-  position: relative;
-}
-
-.input-area::before {
-  content: '';
-  position: absolute;
-  top: 0;
-  left: 0;
-  right: 0;
-  height: 1px;
-  background: linear-gradient(90deg, transparent, var(--cyan-glow-subtle), var(--purple-glow-subtle), transparent);
+  padding: 16px 24px 20px;
+  background: var(--bg-primary);
+  border-top: 1px solid var(--border-light);
 }
 
 .options-bar {
   display: flex;
   flex-wrap: wrap;
-  gap: 8px;
+  gap: 10px;
   margin-bottom: 12px;
   align-items: center;
 }
@@ -1312,7 +1462,7 @@ body {
 }
 
 .option-group label {
-  font-size: 10px;
+  font-size: 11px;
   font-weight: 500;
   text-transform: uppercase;
   letter-spacing: 0.5px;
@@ -1321,8 +1471,8 @@ body {
 
 .option-select {
   padding: 6px 10px;
-  background: var(--glass-bg-light);
-  border: 1px solid var(--glass-border);
+  background: var(--bg-secondary);
+  border: 1px solid var(--border-light);
   border-radius: var(--radius-sm);
   color: var(--text-secondary);
   font-family: var(--font-mono);
@@ -1333,8 +1483,7 @@ body {
 }
 
 .option-select:hover, .option-select:focus {
-  border-color: var(--cyan-dim);
-  box-shadow: 0 0 10px var(--cyan-glow-subtle);
+  border-color: var(--accent);
 }
 
 .option-checkbox {
@@ -1345,14 +1494,14 @@ body {
   font-size: 11px;
   color: var(--text-muted);
   padding: 6px 10px;
-  background: var(--glass-bg-light);
-  border: 1px solid var(--glass-border);
+  background: var(--bg-secondary);
+  border: 1px solid var(--border-light);
   border-radius: var(--radius-sm);
   transition: all var(--transition-fast);
 }
 
 .option-checkbox:hover {
-  border-color: var(--glass-border-hover);
+  border-color: var(--border-default);
 }
 
 .option-checkbox input[type="checkbox"] {
@@ -1360,7 +1509,7 @@ body {
   -webkit-appearance: none;
   width: 14px;
   height: 14px;
-  background: var(--bg-tertiary);
+  background: var(--bg-primary);
   border: 1px solid var(--border-default);
   border-radius: 3px;
   cursor: pointer;
@@ -1369,9 +1518,8 @@ body {
 }
 
 .option-checkbox input[type="checkbox"]:checked {
-  background: var(--cyan);
-  border-color: var(--cyan);
-  box-shadow: 0 0 8px var(--cyan-glow);
+  background: var(--accent);
+  border-color: var(--accent);
 }
 
 .option-checkbox input[type="checkbox"]:checked::after {
@@ -1381,14 +1529,14 @@ body {
   left: 50%;
   transform: translate(-50%, -50%);
   font-size: 10px;
-  color: var(--bg-deep);
+  color: white;
   font-weight: bold;
 }
 
 .image-upload-btn {
   padding: 6px 12px;
-  background: var(--glass-bg-light);
-  border: 1px solid var(--glass-border);
+  background: var(--bg-secondary);
+  border: 1px solid var(--border-light);
   border-radius: var(--radius-sm);
   color: var(--text-muted);
   font-size: 11px;
@@ -1400,8 +1548,8 @@ body {
 }
 
 .image-upload-btn:hover {
-  border-color: var(--purple-dim);
-  color: var(--purple);
+  border-color: var(--accent);
+  color: var(--accent);
 }
 
 #opt-image-input {
@@ -1420,10 +1568,10 @@ body {
   align-items: center;
   gap: 8px;
   padding: 6px 10px;
-  background: var(--glass-bg-light);
-  border: 1px solid var(--purple-dim);
+  background: var(--bg-secondary);
+  border: 1px solid var(--border-default);
   border-radius: var(--radius-sm);
-  animation: imgAppear 0.3s ease-out;
+  animation: imgAppear 0.2s ease-out;
 }
 
 @keyframes imgAppear {
@@ -1456,7 +1604,7 @@ body {
 }
 
 .img-preview .remove:hover {
-  color: var(--red);
+  color: var(--error);
 }
 
 .input-row {
@@ -1476,8 +1624,8 @@ body {
   max-height: 150px;
   padding: 14px 18px;
   padding-right: 50px;
-  background: var(--bg-deep);
-  border: 1px solid var(--glass-border);
+  background: var(--bg-secondary);
+  border: 1px solid var(--border-light);
   border-radius: var(--radius-lg);
   color: var(--text-primary);
   font-family: var(--font-sans);
@@ -1493,12 +1641,12 @@ body {
 }
 
 .chat-input:focus {
-  border-color: var(--cyan);
-  box-shadow: 0 0 0 3px var(--cyan-glow-subtle), 0 0 30px var(--cyan-glow-subtle);
+  border-color: var(--accent);
+  box-shadow: 0 0 0 3px var(--accent-light);
 }
 
 .chat-input:not(:placeholder-shown) {
-  border-color: var(--glass-border-hover);
+  border-color: var(--border-default);
 }
 
 .input-hint {
@@ -1526,58 +1674,39 @@ body {
   cursor: pointer;
   font-size: 18px;
   transition: all var(--transition-base);
-  position: relative;
-  overflow: hidden;
 }
 
 .btn-send {
-  background: linear-gradient(135deg, var(--cyan), var(--cyan-dim));
-  color: var(--bg-deep);
-  box-shadow: 0 4px 20px var(--cyan-glow);
+  background: var(--accent);
+  color: white;
 }
 
 .btn-send:hover {
-  transform: translateY(-2px);
-  box-shadow: 0 6px 30px var(--cyan-glow), 0 0 40px var(--cyan-glow-subtle);
+  background: var(--accent-hover);
+  transform: translateY(-1px);
+  box-shadow: var(--shadow-md);
 }
 
 .btn-send:active {
   transform: translateY(0);
 }
 
-.btn-send::after {
-  content: '';
-  position: absolute;
-  inset: 0;
-  background: linear-gradient(135deg, transparent, rgba(255,255,255,0.2), transparent);
-  transform: translateX(-100%);
-  transition: transform 0.5s;
-}
-
-.btn-send:hover::after {
-  transform: translateX(100%);
-}
-
 .btn-stop {
-  background: linear-gradient(135deg, var(--red), #cc4444);
+  background: var(--error);
   color: white;
-  box-shadow: 0 4px 20px var(--red-glow);
   display: none;
 }
 
 .btn-stop:hover {
-  transform: translateY(-2px);
-  box-shadow: 0 6px 30px var(--red-glow);
+  background: #dc2626;
 }
 
 /* ═══ OUTPUT PANEL (Right Side) ═══ */
 .output-panel {
   width: 380px;
   min-width: 380px;
-  background: var(--glass-bg);
-  backdrop-filter: blur(20px);
-  -webkit-backdrop-filter: blur(20px);
-  border-left: 1px solid var(--glass-border);
+  background: var(--bg-secondary);
+  border-left: 1px solid var(--border-light);
   display: flex;
   flex-direction: column;
   overflow: hidden;
@@ -1585,23 +1714,12 @@ body {
   z-index: var(--z-panel);
 }
 
-.output-panel::before {
-  content: '';
-  position: absolute;
-  top: 0;
-  left: 0;
-  bottom: 0;
-  width: 1px;
-  background: linear-gradient(180deg, var(--purple-glow-subtle), transparent, var(--cyan-glow-subtle));
-  opacity: 0.5;
-}
-
 .output-tabs {
   display: flex;
   padding: 8px;
   gap: 4px;
-  border-bottom: 1px solid var(--glass-border);
-  background: var(--glass-bg-light);
+  border-bottom: 1px solid var(--border-light);
+  background: var(--bg-secondary);
 }
 
 .output-tab {
@@ -1621,13 +1739,13 @@ body {
 
 .output-tab:hover {
   color: var(--text-secondary);
-  background: var(--glass-bg);
+  background: var(--bg-hover);
 }
 
 .output-tab.active {
-  background: var(--glass-bg);
-  color: var(--cyan);
-  box-shadow: 0 0 15px var(--cyan-glow-subtle);
+  background: var(--bg-primary);
+  color: var(--accent);
+  box-shadow: var(--shadow-sm);
 }
 
 .tab-pane {
@@ -1646,9 +1764,10 @@ body {
   height: 100%;
   display: flex;
   flex-direction: column;
-  background: var(--bg-deep);
+  background: var(--bg-primary);
   border-radius: var(--radius-md);
   overflow: hidden;
+  border: 1px solid var(--border-light);
 }
 
 .preview-placeholder {
@@ -1685,13 +1804,13 @@ body {
   justify-content: flex-end;
   padding: 8px;
   background: var(--bg-tertiary);
-  border-top: 1px solid var(--border-default);
+  border-top: 1px solid var(--border-light);
 }
 
 .btn-fullscreen {
   padding: 6px 12px;
-  background: var(--glass-bg);
-  border: 1px solid var(--glass-border);
+  background: var(--bg-primary);
+  border: 1px solid var(--border-light);
   border-radius: var(--radius-sm);
   color: var(--text-muted);
   font-size: 11px;
@@ -1701,8 +1820,8 @@ body {
 }
 
 .btn-fullscreen:hover {
-  border-color: var(--cyan-dim);
-  color: var(--cyan);
+  border-color: var(--accent);
+  color: var(--accent);
 }
 
 /* Code Pane */
@@ -1718,14 +1837,14 @@ body {
   justify-content: space-between;
   padding: 8px 12px;
   background: var(--bg-tertiary);
-  border: 1px solid var(--border-default);
+  border: 1px solid var(--border-light);
   border-radius: var(--radius-md) var(--radius-md) 0 0;
 }
 
 .code-tab-btn {
   padding: 5px 10px;
-  background: var(--glass-bg);
-  border: 1px solid var(--glass-border);
+  background: var(--bg-primary);
+  border: 1px solid var(--border-light);
   border-radius: var(--radius-sm);
   color: var(--text-muted);
   font-size: 10px;
@@ -1735,14 +1854,14 @@ body {
 }
 
 .code-tab-btn:hover {
-  border-color: var(--cyan-dim);
-  color: var(--cyan);
+  border-color: var(--accent);
+  color: var(--accent);
 }
 
 .code-content {
   flex: 1;
-  background: var(--bg-deep);
-  border: 1px solid var(--border-default);
+  background: #1e1e1e;
+  border: 1px solid var(--border-light);
   border-top: none;
   border-radius: 0 0 var(--radius-md) var(--radius-md);
   padding: 14px;
@@ -1750,7 +1869,7 @@ body {
   font-family: var(--font-mono);
   font-size: 12px;
   line-height: 1.7;
-  color: var(--text-secondary);
+  color: #e0e0e0;
   white-space: pre-wrap;
   word-break: break-all;
 }
@@ -1782,34 +1901,34 @@ body {
   gap: 6px;
 }
 
-.console-label.stdout { color: var(--green); }
-.console-label.stderr { color: var(--red); }
+.console-label.stdout { color: var(--success); }
+.console-label.stderr { color: var(--error); }
 
 .console-output {
   flex: 1;
-  background: var(--bg-deep);
-  border: 1px solid var(--border-default);
+  background: #1e1e1e;
+  border: 1px solid var(--border-light);
   border-radius: var(--radius-sm);
   padding: 10px;
   overflow: auto;
   font-family: var(--font-mono);
   font-size: 11px;
   line-height: 1.6;
-  color: var(--text-secondary);
+  color: #9ca3af;
   white-space: pre-wrap;
   word-break: break-all;
 }
 
 /* ═══ STATUS BAR ═══ */
 .status-bar {
-  height: 28px;
-  min-height: 28px;
+  height: 32px;
+  min-height: 32px;
   display: flex;
   align-items: center;
   justify-content: space-between;
   padding: 0 16px;
-  background: var(--bg-primary);
-  border-top: 1px solid var(--glass-border);
+  background: var(--bg-secondary);
+  border-top: 1px solid var(--border-light);
   font-size: 11px;
   font-family: var(--font-mono);
 }
@@ -1817,7 +1936,7 @@ body {
 .status-left, .status-right {
   display: flex;
   align-items: center;
-  gap: 16px;
+  gap: 20px;
 }
 
 .status-item {
@@ -1835,10 +1954,10 @@ body {
 }
 
 .status-idle { color: var(--text-muted); }
-.status-working { color: var(--amber); }
-.status-success { color: var(--green); }
-.status-error { color: var(--red); }
-.status-info { color: var(--cyan); }
+.status-working { color: var(--warning); }
+.status-success { color: var(--success); }
+.status-error { color: var(--error); }
+.status-info { color: var(--accent); }
 
 .status-working .indicator {
   animation: statusPulse 1s ease-in-out infinite;
@@ -1853,8 +1972,8 @@ body {
 .fullscreen-overlay {
   position: fixed;
   inset: 0;
-  background: rgba(5, 8, 16, 0.95);
-  backdrop-filter: blur(10px);
+  background: rgba(0, 0, 0, 0.9);
+  backdrop-filter: blur(8px);
   z-index: var(--z-modal);
   display: none;
   align-items: center;
@@ -1881,8 +2000,8 @@ body {
   display: flex;
   align-items: center;
   justify-content: center;
-  background: var(--glass-bg);
-  border: 1px solid var(--glass-border);
+  background: var(--bg-secondary);
+  border: 1px solid var(--border-light);
   border-radius: var(--radius-md);
   color: var(--text-secondary);
   font-size: 20px;
@@ -1891,17 +2010,17 @@ body {
 }
 
 .fullscreen-close:hover {
-  border-color: var(--red);
-  color: var(--red);
+  border-color: var(--error);
+  color: var(--error);
 }
 
 .fullscreen-iframe {
   width: 90vw;
   height: 90vh;
-  border: 1px solid var(--glass-border);
+  border: 1px solid var(--border-light);
   border-radius: var(--radius-lg);
   background: white;
-  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
+  box-shadow: var(--shadow-lg);
 }
 
 /* ═══ RESPONSIVE ADJUSTMENTS ═══ */
@@ -1912,8 +2031,12 @@ body {
   }
   
   .sidebar {
-    width: 220px;
-    min-width: 220px;
+    width: 240px;
+    min-width: 240px;
+  }
+  
+  .settings-panel {
+    left: 240px;
   }
 }
 
@@ -1922,17 +2045,28 @@ body {
     display: none;
   }
   
+  .settings-panel {
+    left: 16px;
+    right: 16px;
+    width: auto;
+    bottom: 50px;
+  }
+  
   .output-panel {
     width: 250px;
     min-width: 250px;
   }
-}
-
-@media (max-width: 600px) {
+  
   .header-center {
     display: none;
   }
   
+  .examples-grid {
+    grid-template-columns: 1fr;
+  }
+}
+
+@media (max-width: 600px) {
   .status-indicators {
     display: none;
   }
@@ -1945,7 +2079,7 @@ body {
     position: fixed;
     right: 0;
     top: var(--header-height);
-    bottom: 28px;
+    bottom: 32px;
     width: 100%;
     min-width: 100%;
     transform: translateX(100%);
@@ -1956,22 +2090,27 @@ body {
   .output-panel.show {
     transform: translateX(0);
   }
+  
+  .welcome-banner {
+    padding: 30px 20px;
+    margin: 30px auto;
+  }
+  
+  .welcome-title {
+    font-size: 22px;
+  }
 }
 
 /* ═══ LOADING/SPINNER ANIMATIONS ═══ */
 .spinner {
   width: 20px;
   height: 20px;
-  border: 2px solid var(--glass-border);
-  border-top-color: var(--cyan);
+  border: 2px solid var(--border-light);
+  border-top-color: var(--accent);
   border-radius: 50%;
   animation: spin 0.8s linear infinite;
 }
 
-@keyframes spin {
-  to { transform: rotate(360deg); }
-}
-
 .typing-indicator {
   display: flex;
   align-items: center;
@@ -1982,7 +2121,7 @@ body {
 .typing-indicator span {
   width: 6px;
   height: 6px;
-  background: var(--cyan);
+  background: var(--accent);
   border-radius: 50%;
   animation: typingBounce 1.4s ease-in-out infinite;
 }
@@ -2010,46 +2149,49 @@ body {
 .hidden { display: none !important; }
 .visible { display: block !important; }
 
-/* Glow effects on hover for interactive elements */
-.glow-hover {
-  transition: box-shadow var(--transition-fast);
+/* Mobile sidebar toggle */
+.mobile-sidebar-toggle {
+  display: none;
 }
 
-.glow-hover:hover {
-  box-shadow: 0 0 20px var(--cyan-glow-subtle);
+@media (max-width: 900px) {
+  .mobile-sidebar-toggle {
+    display: flex;
+  }
 }
 </style>
 </head>
 <body>
 
-<!-- Animated Background -->
-<div class="bg-canvas">
-  <div class="bg-gradient-mesh"></div>
-  <div class="particles-container" id="particles"></div>
-  <div class="grid-overlay"></div>
-  <div class="scanline"></div>
-</div>
-
 <!-- Main App Container -->
 <div class="app-container">
 
   <!-- Header -->
   <header class="header">
     <div class="header-left">
+      <button class="btn-icon mobile-sidebar-toggle" onclick="toggleSidebar()">☰</button>
       <div class="logo" onclick="newChat()">
         <div class="logo-icon">⚡</div>
         <div class="logo-text">
           <span class="logo-title">SoniCoder</span>
-          <span class="logo-version">v2.0 AI Agent</span>
+          <span class="logo-version">v2.0</span>
         </div>
       </div>
     </div>
     
     <div class="header-center">
+      <div class="search-bar">
+        <span class="search-icon">🔍</span>
+        <input type="text" placeholder="Search conversations..." id="search-input">
+      </div>
+      
       <div class="model-selector" onclick="toggleModelMenu()">
         <span class="model-dot" id="model-dot"></span>
         <span class="model-text" id="model-pill-text">Loading...</span>
         <span style="font-size: 10px; color: var(--text-muted);">▼</span>
+        <div class="model-dropdown" id="model-dropdown">
+          <!-- Model options populated by JS -->
+        </div>
       </div>
       
       <div class="status-pill">
@@ -2061,6 +2203,7 @@ body {
     <div class="header-right">
       <button class="btn-icon" onclick="refreshWorkspace()" title="Refresh Workspace">↻</button>
       <button class="btn-icon" onclick="newChat()" title="New Chat">+</button>
+      <div class="user-avatar" onclick="toggleUserMenu()" title="User Menu">U</div>
     </div>
   </header>
 
@@ -2068,31 +2211,142 @@ body {
   <main class="main-content">
     
     <!-- Sidebar -->
-    <aside class="sidebar">
+    <aside class="sidebar" id="sidebar">
       <div class="sidebar-header">
-        <span class="sidebar-title">Workspace</span>
-        <div class="sidebar-actions">
-          <button class="btn-sidebar-action" onclick="refreshWorkspace()" title="Refresh">↻</button>
+        <button class="new-chat-btn" onclick="newChat()">
+          <span>+ New Chat</span>
+        </button>
+      </div>
+      
+      <!-- Chat History Section -->
+      <div class="sidebar-section">
+        <div class="sidebar-section-title">
+          <span>Recent Chats</span>
+        </div>
+        <div class="chat-history-list" id="chat-history-list">
+          <div class="chat-history-empty">No recent chats</div>
         </div>
       </div>
       
-      <div class="sidebar-content">
-        <div class="file-tree" id="files-tree"></div>
-        <div class="file-viewer" id="file-viewer"></div>
+      <!-- Workspace Section -->
+      <div class="sidebar-section">
+        <div class="sidebar-section-title">
+          <span>📁 Workspace</span>
+          <button class="btn-sidebar-action" onclick="refreshWorkspace()" title="Refresh" style="background:none;border:none;color:var(--text-muted);cursor:pointer;font-size:12px;">↻</button>
+        </div>
+        <div class="sidebar-content" style="padding: 0 12px;">
+          <div class="file-tree" id="files-tree"></div>
+          <div class="file-viewer" id="file-viewer"></div>
+        </div>
       </div>
       
+      <!-- MCP Section -->
       <div class="sidebar-section">
-        <div class="sidebar-section-title">🔌 MCP Servers</div>
+        <div class="sidebar-section-title">
+          <span>🔌 MCP Servers</span>
+        </div>
         <div class="sidebar-content" style="padding: 0 12px;">
           <div id="mcp-content"></div>
         </div>
       </div>
+      
+      <!-- Sidebar Footer with Storage Mode & Settings -->
+      <div class="sidebar-footer">
+        <div class="sidebar-footer-actions">
+          <div class="storage-mode" id="storage-mode">
+            <span class="storage-dot"></span>
+            <span>Local</span>
+          </div>
+          <button class="settings-btn" onclick="toggleSettings()" title="Settings">⚙️</button>
+        </div>
+      </div>
     </aside>
 
+    <!-- Settings Panel -->
+    <div class="settings-panel" id="settings-panel">
+      <div class="settings-panel-header">
+        <span class="settings-panel-title">Settings</span>
+        <button class="settings-close-btn" onclick="toggleSettings()">✕</button>
+      </div>
+      <div class="settings-panel-body">
+        <!-- Model Selection -->
+        <div class="setting-group">
+          <label class="setting-label">
+            <span>Model</span>
+          </label>
+          <select class="setting-select" id="setting-model" onchange="onSettingModelChange(this.value)">
+            <option value="qwen2.5-coder">Qwen2.5-Coder</option>
+            <option value="minicpm5">MiniCPM5</option>
+            <option value="deepseek">DeepSeek</option>
+            <option value="codestral">Codestral</option>
+          </select>
+        </div>
+        
+        <!-- Temperature -->
+        <div class="setting-group">
+          <label class="setting-label">
+            <span>Temperature</span>
+            <span class="setting-value" id="temp-value">0.7</span>
+          </label>
+          <input type="range" class="setting-slider" id="setting-temperature" 
+                 min="0" max="2" step="0.1" value="0.7"
+                 oninput="document.getElementById('temp-value').textContent = this.value">
+        </div>
+        
+        <!-- Max Tokens -->
+        <div class="setting-group">
+          <label class="setting-label">
+            <span>Max Tokens</span>
+            <span class="setting-value" id="tokens-value">8192</span>
+          </label>
+          <input type="range" class="setting-slider" id="setting-maxtokens" 
+                 min="1024" max="32768" step="1024" value="8192"
+                 oninput="document.getElementById('tokens-value').textContent = this.value">
+        </div>
+        
+        <!-- Storage Mode -->
+        <div class="setting-group">
+          <label class="setting-label">
+            <span>Storage Mode</span>
+          </label>
+          <select class="setting-select" id="setting-storage" onchange="onStorageModeChange(this.value)">
+            <option value="local">Local</option>
+            <option value="hf-hub">HuggingFace Hub</option>
+            <option value="bucket">Cloud Bucket</option>
+          </select>
+        </div>
+        
+        <!-- Theme Toggle -->
+        <div class="setting-group">
+          <div class="setting-row">
+            <label class="setting-label" style="margin:0;"><span>Dark Mode</span></label>
+            <div class="setting-toggle" id="theme-toggle" onclick="toggleTheme()"></div>
+          </div>
+        </div>
+        
+        <!-- Export Buttons -->
+        <div class="setting-group">
+          <label class="setting-label"><span>Export</span></label>
+          <div class="export-buttons">
+            <button class="export-btn" onclick="exportChat('json')">📄 JSON</button>
+            <button class="export-btn" onclick="exportChat('markdown')">📝 MD</button>
+          </div>
+        </div>
+      </div>
+    </div>
+
     <!-- Chat Area -->
     <section class="chat-area">
       <div class="chat-messages" id="chat-messages">
-        <!-- Messages will be inserted here -->
+        <!-- Welcome message shown when no messages -->
+        <div class="welcome-banner" id="welcome-banner">
+          <span class="welcome-icon">👋</span>
+          <h1 class="welcome-title">Hi, I'm SoniCoder</h1>
+          <p class="welcome-subtitle">How can I help you code today? I can build apps, write scripts, debug code, and more.</p>
+          <div class="examples-grid" id="examples-row">
+            <!-- Examples populated by JS -->
+          </div>
+        </div>
       </div>
       
       <!-- Input Area -->
@@ -2161,7 +2415,7 @@ body {
     </section>
 
     <!-- Output Panel -->
-    <aside class="output-panel">
+    <aside class="output-panel" id="output-panel">
       <div class="output-tabs">
         <button class="output-tab active" data-tab="preview" onclick="switchTab('preview')">Preview</button>
         <button class="output-tab" data-tab="code" onclick="switchTab('code')">Code</button>
@@ -2219,7 +2473,7 @@ body {
       <span class="status-item">
         <span id="header-model-name"></span>
       </span>
-      <span class="status-item">Local Mode</span>
+      <span class="status-item" id="status-storage">Local Mode</span>
       <span class="status-item">SoniCoder v2</span>
     </div>
   </footer>
@@ -2249,35 +2503,45 @@ var state = {
   consoleStdout: '',
   consoleStderr: '',
   attachedImage: null,
-  activeTab: 'preview'
+  activeTab: 'preview',
+  chatHistory: [],
+  settingsOpen: false,
+  modelMenuOpen: false,
+  theme: 'light'
 };
 
 // ═══ INITIALIZATION ═══
 
 document.addEventListener('DOMContentLoaded', function() {
-  initParticles();
   loadConfig();
   pollModelStatus();
   loadMcpStatus();
   refreshWorkspace();
-  
-  // Add welcome message
-  addMessage('system', 'Welcome to **SoniCoder v2** — Your AI Code Agent. What would you like to build today?');
+  initTheme();
 });
 
-function initParticles() {
-  var container = document.getElementById('particles');
-  var particleCount = 30;
-  
-  for (var i = 0; i < particleCount; i++) {
-    var particle = document.createElement('div');
-    particle.className = 'particle';
-    particle.style.left = Math.random() * 100 + '%';
-    particle.style.width = (Math.random() * 3 + 1) + 'px';
-    particle.style.height = particle.style.width;
-    particle.style.animationDuration = (Math.random() * 20 + 15) + 's';
-    particle.style.animationDelay = (Math.random() * 20) + 's';
-    container.appendChild(particle);
+function initTheme() {
+  var savedTheme = localStorage.getItem('sonicoder-theme') || 'light';
+  state.theme = savedTheme;
+  document.documentElement.setAttribute('data-theme', savedTheme);
+  var toggle = document.getElementById('theme-toggle');
+  if (toggle && savedTheme === 'dark') {
+    toggle.classList.add('active');
+  }
+}
+
+function toggleTheme() {
+  var toggle = document.getElementById('theme-toggle');
+  if (state.theme === 'light') {
+    state.theme = 'dark';
+    document.documentElement.setAttribute('data-theme', 'dark');
+    localStorage.setItem('sonicoder-theme', 'dark');
+    if (toggle) toggle.classList.add('active');
+  } else {
+    state.theme = 'light';
+    document.documentElement.setAttribute('data-theme', '');
+    localStorage.setItem('sonicoder-theme', 'light');
+    if (toggle) toggle.classList.remove('active');
   }
 }
 
@@ -2324,10 +2588,39 @@ async function loadConfig() {
       agentSel.appendChild(opt);
     });
 
+    // Populate model dropdown in header
+    populateModelDropdown(config);
+
     renderExamples(config);
   } catch(e) { console.error('Config load failed:', e); }
 }
 
+function populateModelDropdown(config) {
+  var dropdown = document.getElementById('model-dropdown');
+  if (!dropdown) return;
+  
+  var models = config.models || [
+    { key: 'qwen2.5-coder', name: 'Qwen2.5-Coder', desc: '1.5B • Code focused' },
+    { key: 'minicpm5', name: 'MiniCPM5', desc: '1B • Versatile' },
+    { key: 'deepseek', name: 'DeepSeek-Coder', desc: '1B • DeepSeek quality' },
+    { key: 'codestral', name: 'Codestral', desc: '1B • Fast inference' }
+  ];
+  
+  dropdown.innerHTML = '';
+  models.forEach(function(m) {
+    var div = document.createElement('div');
+    div.className = 'model-option';
+    div.dataset.key = m.key;
+    div.innerHTML = '<div><div class="model-name">' + m.name + '</div><div class="model-desc">' + (m.desc || '') + '</div></div>';
+    div.onclick = function(e) {
+      e.stopPropagation();
+      switchModel(m.key);
+      closeModelMenu();
+    };
+    dropdown.appendChild(div);
+  });
+}
+
 function updateFrameworkOptions() {
   if (!state.config) return;
   var langSel = document.getElementById('opt-language');
@@ -2429,6 +2722,11 @@ async function switchModel(key) {
     document.getElementById('model-dot').className = 'model-dot loading';
     document.getElementById('model-pill-text').textContent = 'Switching...';
     setStatus('status-working', 'SWITCHING MODEL...');
+    
+    // Update setting select too
+    var settingSelect = document.getElementById('setting-model');
+    if (settingSelect) settingSelect.value = key;
+    
     await fetch('/api/switch_model', {
       method: 'POST', headers: {'Content-Type': 'application/json'},
       body: JSON.stringify({ model_key: key }),
@@ -2437,6 +2735,79 @@ async function switchModel(key) {
   } catch(e) { console.error(e); }
 }
 
+function onSettingModelChange(value) {
+  switchModel(value);
+  closeModelMenu();
+}
+
+function onStorageModeChange(value) {
+  var modeEl = document.getElementById('storage-mode');
+  var statusEl = document.getElementById('status-storage');
+  
+  modeEl.className = 'storage-mode ' + value;
+  
+  var labels = {
+    'local': 'Local Mode',
+    'hf-hub': 'HF Hub Mode',
+    'bucket': 'Bucket Mode'
+  };
+  
+  var storageLabels = {
+    'local': 'Local',
+    'hf-hub': 'HF Hub',
+    'bucket': 'Bucket'
+  };
+  
+  if (modeEl) modeEl.querySelector('span:last-child').textContent = storageLabels[value] || value;
+  if (statusEl) statusEl.textContent = labels[value] || value;
+}
+
+function toggleModelMenu() {
+  var dropdown = document.getElementById('model-dropdown');
+  state.modelMenuOpen = !state.modelMenuOpen;
+  if (dropdown) {
+    dropdown.classList.toggle('show', state.modelMenuOpen);
+  }
+}
+
+function closeModelMenu() {
+  state.modelMenuOpen = false;
+  var dropdown = document.getElementById('model-dropdown');
+  if (dropdown) dropdown.classList.remove('show');
+}
+
+function toggleSettings() {
+  var panel = document.getElementById('settings-panel');
+  state.settingsOpen = !state.settingsOpen;
+  if (panel) {
+    panel.classList.toggle('show', state.settingsOpen);
+  }
+}
+
+function toggleSidebar() {
+  var sidebar = document.getElementById('sidebar');
+  if (sidebar) {
+    sidebar.style.display = sidebar.style.display === 'none' ? 'flex' : 'none';
+  }
+}
+
+function toggleUserMenu() {
+  // Could implement user menu here
+  console.log('User menu clicked');
+}
+
+// Close menus when clicking outside
+document.addEventListener('click', function(e) {
+  if (state.modelMenuOpen && !e.target.closest('.model-selector')) {
+    closeModelMenu();
+  }
+  if (state.settingsOpen && !e.target.closest('.settings-panel') && !e.target.closest('.settings-btn')) {
+    var panel = document.getElementById('settings-panel');
+    if (panel) panel.classList.remove('show');
+    state.settingsOpen = false;
+  }
+});
+
 async function refreshWorkspace() {
   try {
     var resp = await fetch('/api/workspace_tree?max_depth=4');
@@ -2455,7 +2826,7 @@ async function refreshWorkspace() {
       if (!node) return '';
       var name = escHtml(node.name || '');
       if (node.type === 'dir') {
-        var html = '<div class="ws-dir"><span class="ws-dir-name">' + name + '</span>';
+        var html = '<div class="ws-dir"><span class="ws-dir-name"><span class="dir-icon">📁</span>' + name + '</span>';
         if (node.children && node.children.length > 0) {
           html += '<div class="ws-children">';
           for (var i = 0; i < node.children.length; i++) {
@@ -2467,7 +2838,7 @@ async function refreshWorkspace() {
         return html;
       } else {
         var size = node.size ? ' (' + formatSize(node.size) + ')' : '';
-        return '<div class="ws-file" data-path="' + name + '" onclick="openWorkspaceFile(\'' + name.replace(/'/g, "\\'") + '\')"><span>' + name + size + '</span></div>';
+        return '<div class="ws-file" data-path="' + name + '" onclick="openWorkspaceFile(\'' + name.replace(/'/g, "\\'") + '\')"><span><span class="file-icon">📄</span>' + name + size + '</span></div>';
       }
     }
 
@@ -2571,20 +2942,64 @@ function renderExamples(config) {
   examples = examples.slice(0, 6);
   var row = document.getElementById('examples-row');
   if (!row) return;
-  row.innerHTML = '<span class="examples-label">Try:</span>';
+  row.innerHTML = '';
   examples.forEach(function(ex) {
-    var chip = document.createElement('span');
-    chip.className = 'example-chip';
-    chip.textContent = ex;
-    chip.onclick = function() {
+    var card = document.createElement('div');
+    card.className = 'example-card';
+    card.textContent = ex;
+    card.onclick = function() {
       document.getElementById('chat-input').value = ex;
       document.getElementById('chat-input').dispatchEvent(new Event('input'));
       handleSend();
     };
-    row.appendChild(chip);
+    row.appendChild(card);
   });
 }
 
+// ═══ EXPORT FUNCTIONS ═══
+
+function exportChat(format) {
+  var messages = document.querySelectorAll('.chat-messages .msg');
+  if (!messages.length) {
+    alert('No chat to export');
+    return;
+  }
+  
+  var content = '';
+  var filename = '';
+  var mimeType = '';
+  
+  if (format === 'json') {
+    var chatData = [];
+    messages.forEach(function(msg) {
+      var role = msg.classList.contains('msg-user') ? 'user' : 
+                  msg.classList.contains('msg-assistant') ? 'assistant' : 'system';
+      var text = msg.querySelector('.msg-content')?.textContent || '';
+      chatData.push({ role: role, content: text });
+    });
+    content = JSON.stringify(chatData, null, 2);
+    filename = 'sonicoder-chat.json';
+    mimeType = 'application/json';
+  } else {
+    messages.forEach(function(msg) {
+      var prefix = msg.classList.contains('msg-user') ? '**You:** ' :
+                   msg.classList.contains('msg-assistant') ? '**SoniCoder:** ' :
+                   '> ';
+      content += prefix + (msg.querySelector('.msg-content')?.textContent || '') + '\n\n';
+    });
+    filename = 'sonicoder-chat.md';
+    mimeType = 'text/markdown';
+  }
+  
+  var blob = new Blob([content], { type: mimeType });
+  var url = URL.createObjectURL(blob);
+  var a = document.createElement('a');
+  a.href = url;
+  a.download = filename;
+  a.click();
+  URL.revokeObjectURL(url);
+}
+
 // ═══ TABS ═══
 
 function switchTab(tab) {
@@ -2610,7 +3025,10 @@ function closeFullscreen() {
   document.getElementById('fullscreen-iframe').src = 'about:blank';
 }
 document.addEventListener('keydown', function(e) {
-  if (e.key === 'Escape') closeFullscreen();
+  if (e.key === 'Escape') {
+    closeFullscreen();
+    closeModelMenu();
+  }
 });
 
 // ═══ INPUT HANDLING ═══
@@ -2633,6 +3051,11 @@ function escHtml(t) { var d = document.createElement('div'); d.textContent = t;
 
 function addMessage(role, content, extra) {
   extra = extra || {};
+  
+  // Hide welcome banner when first message is added
+  var welcomeBanner = document.getElementById('welcome-banner');
+  if (welcomeBanner) welcomeBanner.style.display = 'none';
+  
   var container = document.getElementById('chat-messages');
   var div = document.createElement('div');
   div.className = 'msg msg-' + role;
@@ -2642,12 +3065,12 @@ function addMessage(role, content, extra) {
   wrapper.className = 'msg-content-wrapper';
   
   var prefix = '';
-  if (role === 'user') prefix = '<span class="msg-prefix">▸ </span>';
-  else if (role === 'assistant') prefix = '<span class="msg-prefix">◈ </span>';
-  else if (role === 'system') prefix = '<span class="msg-prefix">◉ </span>';
+  if (role === 'user') prefix = '<span class="msg-prefix">You</span>';
+  else if (role === 'assistant') prefix = '<span class="msg-prefix">SoniCoder</span>';
+  else if (role === 'system') prefix = '<span class="msg-prefix">◉</span>';
   
   var iterationHtml = extra.iteration ? '<div class="iteration-badge">Iteration ' + extra.iteration + '/' + extra.max_iterations + '</div>' : '';
-  wrapper.innerHTML = iterationHtml + prefix + '<span class="msg-content">' + renderMd(content) + '</span>';
+  wrapper.innerHTML = iterationHtml + prefix + '<div class="msg-content">' + renderMd(content) + '</div>';
   
   div.appendChild(wrapper);
   container.appendChild(div);
@@ -2910,6 +3333,11 @@ function newChat() {
   state.consoleStdout = '';
   state.consoleStderr = '';
   document.getElementById('chat-messages').innerHTML = '';
+  
+  // Show welcome banner again
+  var welcomeBanner = document.getElementById('welcome-banner');
+  if (welcomeBanner) welcomeBanner.style.display = '';
+  
   addMessage('system', 'New session started. What would you like to build?');
   updateConsole();
   setStatus('status-idle', 'IDLE');
@@ -2940,13 +3368,6 @@ function setStatus(className, text) {
   el.className = 'status-item ' + className;
   document.getElementById('status-text').textContent = text;
 }
-
-// ═══ MODEL MENU TOGGLE (placeholder) ═══
-
-function toggleModelMenu() {
-  // Could implement dropdown menu here
-  console.log('Model menu toggle clicked');
-}
 </script>
 </body>
 </html>