feat(server): 新增修改密码接口 POST /api/auth/password（验原密码、作废会话）

console/renderer/styles.css

@@ -33,9 +33,15 @@ body {
   display: flex;
   align-items: center;
   justify-content: space-between;
-  padding: 14px 20px;
+  gap: 16px;
+  height: 50px;
+  flex: 0 0 auto;
+  padding: 0 8px 0 16px;
   border-bottom: 1px solid var(--border);
   background: var(--panel);
+  /* 整条标题栏拖拽，按钮区单独开洞，否则按钮点不动 */
+  -webkit-app-region: drag;
+  user-select: none;
 }
 
 .brand {
@@ -45,25 +51,99 @@ body {
 }
 
 .brand-mark {
-  width: 10px;
-  height: 34px;
-  border-radius: 5px;
+  width: 8px;
+  height: 22px;
+  border-radius: 4px;
   background: linear-gradient(180deg, var(--accent), #1b6bb8);
 }
 
 h1 {
   margin: 0;
-  font-size: 16px;
+  font-size: 15px;
   font-weight: 600;
+  line-height: 1.25;
   letter-spacing: 0.02em;
 }
 
 .brand-sub {
   margin: 0;
-  font-size: 12px;
+  font-size: 11px;
+  line-height: 1.3;
   color: var(--muted);
 }
 
+.topbar-right {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+}
+
+.win-controls {
+  display: flex;
+  align-items: center;
+  gap: 4px;
+  -webkit-app-region: no-drag;
+}
+
+.win-btn {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  width: 36px;
+  height: 32px;
+  padding: 0;
+  border: 1px solid transparent;
+  border-radius: 8px;
+  background: transparent;
+  color: var(--muted);
+  cursor: pointer;
+  transition:
+    background 0.15s ease,
+    color 0.15s ease,
+    border-color 0.15s ease;
+}
+
+.win-btn svg {
+  fill: none;
+  stroke: currentColor;
+  stroke-width: 1.7;
+  stroke-linecap: round;
+  stroke-linejoin: round;
+}
+
+.win-btn:hover {
+  background: rgba(255, 255, 255, 0.08);
+  color: var(--text);
+}
+
+.win-btn:active {
+  background: rgba(255, 255, 255, 0.14);
+}
+
+.win-btn:focus-visible {
+  outline: 2px solid var(--accent);
+  outline-offset: -2px;
+}
+
+/* 关闭键是唯一的破坏性操作，hover 变红做区分 */
+.win-btn-close:hover {
+  border-color: var(--err);
+  background: var(--err);
+  color: #fff;
+}
+
+.win-btn .icon-restore {
+  display: none;
+}
+
+.win-btn.is-maximized .icon-max {
+  display: none;
+}
+
+.win-btn.is-maximized .icon-restore {
+  display: block;
+}
+
 main {
   flex: 1;
   min-height: 0;