增加分栏后可以全屏和还原的功能

client/src/components/BottomNav.tsx

@@ -8,7 +8,7 @@
    ============================================================ */
 import { useDevice } from "@/contexts/DeviceContext";
 import { cn } from "@/lib/utils";
-import { useAIDrawer } from "@/contexts/AIDrawerContext";
+import { readAndClearAiSplitRestorePath, useAIDrawer } from "@/contexts/AIDrawerContext";
 import { useIsLgUp } from "@/hooks/useIsLgUp";
 import localeZh from "@/locales/data-zh.json";
 import localeZhHK from "@/locales/data-zh-HK.json";
@@ -42,7 +42,7 @@ const NAV_ITEMS: NavItem[] = [
 ];
 
 export default function BottomNav() {
-  const [location] = useLocation();
+  const [location, setLocation] = useLocation();
   const isLgUp = useIsLgUp();
   const { open: aiDrawerOpen, setOpen: setAiDrawerOpen } = useAIDrawer();
   const { deviceState } = useDevice();
@@ -160,13 +160,23 @@ export default function BottomNav() {
                 tabIndex={0}
                 className="cursor-pointer select-none"
                 onClick={() => {
-                  if (location === "/ai") return;
+                  if (location === "/ai") {
+                    const path = readAndClearAiSplitRestorePath();
+                    setLocation(path);
+                    setAiDrawerOpen(true);
+                    return;
+                  }
                   setAiDrawerOpen((o) => !o);
                 }}
                 onKeyDown={(e) => {
                   if (e.key !== "Enter" && e.key !== " ") return;
                   e.preventDefault();
-                  if (location === "/ai") return;
+                  if (location === "/ai") {
+                    const path = readAndClearAiSplitRestorePath();
+                    setLocation(path);
+                    setAiDrawerOpen(true);
+                    return;
+                  }
                   setAiDrawerOpen((o) => !o);
                 }}
               >