新增分享码日志管理，美化界面，优化代码上传脚本

frontend/src/styles/lux-theme.css

@@ -84,12 +84,24 @@ body {
 
 .lux-shell-body > .el-container {
   height: 100%;
+  box-sizing: border-box;
+  padding-left: 64px;
+}
+
+.lux-shell-body > .el-container > .lux-right-col {
+  flex: 1;
+  min-width: 0;
+  width: 100%;
 }
 
 /* —— 侧栏玻璃 —— */
 .lux-shell .sidebar-glass {
-  position: relative;
-  width: 220px !important;
+  position: absolute;
+  left: 0;
+  top: 0;
+  bottom: 0;
+  flex: none;
+  width: 64px !important;
   height: 100%;
   display: flex;
   flex-direction: column;
@@ -99,38 +111,51 @@ body {
   -webkit-backdrop-filter: blur(18px);
   border-right: 1px solid rgba(255, 255, 255, 0.08);
   box-shadow: inset -1px 0 0 rgba(255, 255, 255, 0.04);
+  transition: width 0.30s ease, box-shadow 0.30s ease;
+  z-index: 30;
+}
+
+.lux-shell .sidebar-glass:not(.is-collapsed) {
+  width: 220px !important;
+  box-shadow:
+    4px 0 24px rgba(0, 0, 0, 0.28),
+    inset -1px 0 0 rgba(255, 255, 255, 0.04);
+}
+
+.lux-shell .sidebar-glass.is-collapsed {
+  width: 64px !important;
 }
 
 .lux-shell .sidebar-logo {
   height: 60px;
   display: flex;
   align-items: center;
-  justify-content: center;
-  padding: 0 12px;
+  justify-content: flex-start;
+  padding: 0 14px;
   background: linear-gradient(180deg, rgba(255, 255, 255, 0.06) 0%, transparent 100%);
   border-bottom: 1px solid rgba(255, 255, 255, 0.08);
 }
 
-.lux-shell .sidebar-logo h2 {
-  margin: 0;
-  font-size: 16px;
-  font-weight: 700;
-  letter-spacing: 0.02em;
-  text-align: center;
-  line-height: 1.35;
-  color: #f1f5f9;
-  text-shadow: 0 0 24px rgba(56, 189, 248, 0.25);
+.lux-shell .sidebar-glass.is-collapsed .sidebar-logo {
+  width: 64px;
+  min-width: 64px;
+  justify-content: center;
+  padding: 0;
+  overflow: visible;
 }
 
 .lux-shell .lux-menu.el-menu {
-  flex: 1;
   min-height: 0;
-  overflow-y: auto;
   border-right: none !important;
   background: transparent !important;
   padding: 8px 6px 16px;
 }
 
+.lux-shell .lux-menu--expanded.is-active.el-menu {
+  flex: 1;
+  overflow-y: auto;
+}
+
 .lux-shell .lux-menu .el-sub-menu__title {
   border-radius: 10px;
   margin: 2px 0;