code cleanup & multi-channel support

backend/static/css/index.css

@@ -30,12 +30,18 @@ body {
     justify-content: center;
 }
 
+.app-container {
+    display: flex;
+    width: 100%;
+    height: 100vh;
+}
+
+/* Chat Container */
 .chat-container {
     display: flex;
     flex-direction: column;
+    flex: 1;
     height: 100dvh;
-    min-width: 100vw;
-    margin: 0 0;
     background: #121212;
     position: relative;
     overflow: hidden;
@@ -46,12 +52,16 @@ body {
     padding: 10px;
     background: #1a1a1a;
     border-bottom: 1px solid #252525;
+    display: flex;
+    align-items: center;
+    gap: 10px;
 }
 
 .chat-title {
     display: flex;
     align-items: center;
     gap: 12px;
+    flex: 1;
 }
 
 .status-dot {
@@ -773,3 +783,153 @@ body {
 .checkbox-group a:hover {
     text-decoration: underline;
 }
+
+/* Sidebar Styles */
+.sidebar {
+    width: 240px;
+    min-width: 180px;
+    max-width: 400px;
+    background: #0f0f0f;
+    display: flex;
+    flex-direction: column;
+    border-right: 1px solid #252525;
+    position: relative;
+    transition:
+        margin-left 0.3s ease,
+        opacity 0.3s ease;
+}
+
+.sidebar.hidden {
+    margin-left: -240px;
+    opacity: 0;
+    pointer-events: none;
+}
+
+.resize-handle {
+    position: absolute;
+    right: 0;
+    top: 0;
+    bottom: 0;
+    width: 4px;
+    cursor: ew-resize;
+    background: transparent;
+    transition: background 0.2s ease;
+    z-index: 10;
+}
+
+.resize-handle:hover {
+    background: rgba(106, 90, 205, 0.5);
+}
+
+.resize-handle:active {
+    background: #6a5acd;
+}
+
+.sidebar-header {
+    padding: 16px;
+    border-bottom: 1px solid #252525;
+    background: #1a1a1a;
+    color: #ffffff;
+    font-weight: 600;
+    font-size: 15px;
+    letter-spacing: 0.3px;
+}
+
+.channels-list {
+    flex: 1;
+    overflow-y: auto;
+    padding: 10px 8px;
+}
+
+.channel-item {
+    padding: 10px 12px;
+    margin: 3px 0;
+    border-radius: 8px;
+    color: #b0b0b0;
+    cursor: pointer;
+    transition: all 0.2s ease;
+    display: flex;
+    align-items: center;
+    gap: 10px;
+    border: 1px solid transparent;
+    background: rgba(30, 30, 30, 0.3);
+}
+
+.channel-item:hover {
+    background: rgba(30, 30, 30, 0.6);
+    border-color: #2a2a2a;
+    color: #e0e0e0;
+    transform: translateX(2px);
+}
+
+.channel-item.active {
+    background: rgba(106, 90, 205, 0.15);
+    border-color: rgba(106, 90, 205, 0.3);
+    color: #ffffff;
+    box-shadow: 0 2px 8px rgba(106, 90, 205, 0.2);
+}
+
+.channel-icon {
+    font-size: 18px;
+    font-weight: 600;
+    color: #666;
+    flex-shrink: 0;
+}
+
+.channel-item:hover .channel-icon {
+    color: #888;
+}
+
+.channel-item.active .channel-icon {
+    color: #6a5acd;
+}
+
+.channel-name {
+    font-size: 14px;
+    font-weight: 500;
+}
+
+/* Scrollbar styling for sidebar */
+.channels-list::-webkit-scrollbar {
+    width: 6px;
+}
+
+.channels-list::-webkit-scrollbar-track {
+    background: #0f0f0f;
+}
+
+.channels-list::-webkit-scrollbar-thumb {
+    background: #252525;
+    border-radius: 3px;
+}
+
+.channels-list::-webkit-scrollbar-thumb:hover {
+    background: #333;
+}
+
+.sidebar-toggle {
+    width: 32px;
+    height: 32px;
+    background: rgba(30, 30, 30, 0.6);
+    border: 1px solid #2a2a2a;
+    border-radius: 6px;
+    cursor: pointer;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    transition: all 0.2s ease;
+    flex-shrink: 0;
+    color: #b0b0b0;
+    font-size: 18px;
+}
+
+.sidebar-toggle:hover {
+    background: rgba(106, 90, 205, 0.2);
+    border-color: rgba(106, 90, 205, 0.3);
+    color: #e0e0e0;
+    transform: scale(1.05);
+}
+
+.sidebar-toggle:active {
+    transform: scale(0.95);
+}