diff --git a/apps/web/src/styles.css b/apps/web/src/styles.css
index 276f1bc..d445bf8 100644
--- a/apps/web/src/styles.css
+++ b/apps/web/src/styles.css
@@ -147,7 +147,7 @@
 
   /* ---------- 按钮 ---------- */
   .ops-btn {
-    @apply inline-flex items-center justify-center gap-1.5 rounded-lg px-3 py-1.5 text-xs font-semibold transition;
+    @apply inline-flex shrink-0 items-center justify-center gap-1.5 whitespace-nowrap rounded-lg px-3 py-1.5 text-xs font-semibold transition;
     border: 1px solid transparent;
     cursor: pointer;
   }
@@ -172,6 +172,7 @@
   .ops-btn-ghost:hover:not(:disabled) { background: var(--hover); color: var(--text); }
 
   /* ---------- chip / badge ---------- */
+  header button, header a { white-space: nowrap; }
   .ops-chip {
     @apply rounded-full px-2.5 py-1 text-[11px] font-medium transition;
     border: 1px solid var(--border);
@@ -324,7 +325,7 @@
 
   /* ---------- 顶栏环境切换器 ---------- */
   .ops-envswitch {
-    @apply inline-flex items-center gap-2 rounded-lg px-2.5 py-1.5 text-xs font-medium transition;
+    @apply inline-flex shrink-0 items-center gap-2 whitespace-nowrap rounded-lg px-2.5 py-1.5 text-xs font-medium transition;
     border: 1px solid var(--border);
     background: var(--panel-2);
     color: var(--text);
@@ -492,6 +493,27 @@
     color: var(--accent-strong);
   }
 
+  /* ---------- 侧栏分段切换（接口/历史） ---------- */
+  .side-seg {
+    display: grid;
+    grid-template-columns: 1fr 1fr;
+    gap: 2px;
+    padding: 2px;
+    border-radius: 0.5rem;
+    background: var(--panel-3);
+  }
+  .side-seg-item {
+    @apply flex items-center justify-center gap-1 rounded-md px-2 py-1 text-[11px] font-medium transition;
+    color: var(--text-dim);
+  }
+  .side-seg-item:hover { color: var(--text); }
+  .side-seg-item.active {
+    background: var(--panel);
+    color: var(--accent-strong);
+    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
+  }
+  .side-seg-item .ops-count { margin-left: 2px; }
+
   /* ---------- 方法 chip 着色 ---------- */
   .ops-chip.ops-method-GET { background: color-mix(in srgb, var(--m-GET) 14%, transparent); color: var(--m-GET); }
   .ops-chip.ops-method-POST { background: color-mix(in srgb, var(--m-POST) 16%, transparent); color: var(--m-POST); }
diff --git a/packages/ui/src/components/Sidebar.tsx b/packages/ui/src/components/Sidebar.tsx
index a4b420f..d76681a 100644
--- a/packages/ui/src/components/Sidebar.tsx
+++ b/packages/ui/src/components/Sidebar.tsx
@@ -25,23 +25,68 @@ export function Sidebar() {
   const history = useWorkspace((s) => s.history);
   const clearHistory = useWorkspace((s) => s.clearHistory);
   const openTab = useWorkspace((s) => s.openTab);
-  const [showHistory, setShowHistory] = useState(true);
+  const [side, setSide] = useState<"api" | "history">("api");
   const [menu, setMenu] = useState<{ x: number; y: number; items: MenuItem[] } | null>(null);
 
   const hitIds = useMemo(() => searchTree(collections, search), [collections, search]);
 
   return (
     <aside className="ops-panel flex w-64 shrink-0 flex-col" style={{ borderRight: "1px solid var(--border)" }}>
-      <div className="p-2.5" style={{ borderBottom: "1px solid var(--border)" }}>
+      <div className="space-y-2 p-2.5" style={{ borderBottom: "1px solid var(--border)" }}>
         <input
           className="ops-input ops-input-sm"
           placeholder="搜索接口 / 目录…"
           value={search}
           onChange={(e) => setSearch(e.target.value)}
         />
+        <div className="side-seg">
+          <button className={cx("side-seg-item", side === "api" && "active")} onClick={() => setSide("api")}>
+            <Icon name="library" size={12} /> 接口
+          </button>
+          <button className={cx("side-seg-item", side === "history" && "active")} onClick={() => setSide("history")}>
+            <Icon name="clock" size={12} /> 历史
+            {history.length > 0 && <span className="ops-count">{Math.min(history.length, 99)}</span>}
+          </button>
+        </div>
       </div>
 
       <div className="ops-scroll min-h-0 flex-1 p-2">
+        {side === "history" ? (
+          <>
+            {history.length === 0 && (
+              <div className="ops-faint px-2 py-8 text-center text-xs leading-5">
+                暂无请求记录
+                <br />
+                发送请求后自动归档
+              </div>
+            )}
+            {history.slice(0, 50).map((h) => (
+              <button
+                key={h.id}
+                className="ops-tree-row w-full !py-1 text-left"
+                onClick={() => {
+                  if (h.nodeId && findNode(useWorkspace.getState().collections, h.nodeId)) {
+                    openTab(h.nodeId);
+                  }
+                }}
+                title={`${h.label}\n${h.url}`}
+              >
+                <span className="ops-faint w-14 shrink-0 text-[10px]">{formatTime(h.at)}</span>
+                {h.method && <span className={`ops-method-${h.method} w-12 shrink-0 text-[10px] font-bold`}>{h.method}</span>}
+                <span className="truncate text-[11px]">{h.label}</span>
+                {h.status !== undefined && (
+                  <span className={cx("ml-auto text-[10px]", h.ok ? "ops-success" : "ops-danger")}>{h.status}</span>
+                )}
+              </button>
+            ))}
+            {history.length > 0 && (
+              <button className="ops-btn ops-btn-ghost ops-danger mt-2 w-full py-1 text-[11px]" onClick={clearHistory}>
+                <Icon name="eraser" size={11} /> 清空历史
+              </button>
+            )}
+          </>
+        ) : (
+        <>
         {collections.length === 0 && (
           <div className="ops-faint px-2 py-8 text-center text-xs leading-5">
             还没有集合
@@ -73,49 +118,11 @@ export function Sidebar() {
               ))}
           </div>
         ))}
-      </div>
-
-      {/* 历史 */}
-      <div style={{ borderTop: "1px solid var(--border)" }}>
-        <button
-          className="ops-faint flex w-full items-center justify-between px-3 py-2 text-[11px] font-semibold uppercase tracking-wider"
-          onClick={() => setShowHistory((v) => !v)}
-        >
-          <span>历史记录 · {history.length}</span>
-          <span>{showHistory ? "▾" : "▸"}</span>
-        </button>
-        {showHistory && (
-          <div className="ops-scroll max-h-44 px-2 pb-2">
-            {history.length === 0 && <div className="ops-faint px-2 py-3 text-center text-[11px]">暂无记录</div>}
-            {history.slice(0, 30).map((h) => (
-              <button
-                key={h.id}
-                className="ops-tree-row w-full !py-1 text-left"
-                onClick={() => {
-                  if (h.nodeId && findNode(useWorkspace.getState().collections, h.nodeId)) {
-                    openTab(h.nodeId);
-                  }
-                }}
-                title={`${h.label}\n${h.url}`}
-              >
-                <span className="ops-faint w-14 shrink-0 text-[10px]">{formatTime(h.at)}</span>
-                {h.method && <span className={`ops-method-${h.method} w-12 shrink-0 text-[10px] font-bold`}>{h.method}</span>}
-                <span className="truncate text-[11px]">{h.label}</span>
-                {h.status !== undefined && (
-                  <span className={cx("ml-auto text-[10px]", h.ok ? "ops-success" : "ops-danger")}>{h.status}</span>
-                )}
-              </button>
-            ))}
-            {history.length > 0 && (
-              <button className="ops-btn ops-btn-ghost ops-danger w-full py-1 text-[11px]" onClick={clearHistory}>
-                清空历史
-              </button>
-            )}
-          </div>
+        </>
         )}
       </div>
 
-      {/* 自动化测试 / 官网入口 */}
+      {/* 底部：跨视图导航 + 外链 */}
       <div className="space-y-1.5 p-2" style={{ borderTop: "1px solid var(--border)" }}>
         <button
           className="ops-btn ops-btn-secondary w-full"
diff --git a/packages/ui/src/components/TopBar.tsx b/packages/ui/src/components/TopBar.tsx
index 148eb58..ec29332 100644
--- a/packages/ui/src/components/TopBar.tsx
+++ b/packages/ui/src/components/TopBar.tsx
@@ -155,7 +155,7 @@ export function TopBar() {
 
   return (
     <header
-      className="ops-panel ops-divider flex h-12 shrink-0 items-center justify-between gap-3 px-4"
+      className="ops-panel ops-divider flex h-12 shrink-0 flex-nowrap items-center justify-between gap-3 overflow-x-auto px-4"
       style={{ zIndex: 30 }}
     >
       <div className="flex items-center gap-3">
@@ -163,7 +163,7 @@ export function TopBar() {
           <Logo size={26} />
           <span className="text-[14px] font-bold tracking-tight">OpsxAPI</span>
         </div>
-        <span className="ops-chip" style={{ padding: "1px 8px", fontSize: 10 }}>
+        <span className="ops-chip hidden whitespace-nowrap xl:inline-flex" style={{ padding: "1px 8px", fontSize: 10 }}>
           HTTP · GraphQL · WS · SSE · Socket.IO · MQTT
         </span>
       </div>