fix(viewer): fix login view visibility and transition behavior

public/viewer.html

@@ -21,6 +21,10 @@
       box-sizing: border-box;
     }
 
+    [hidden] {
+      display: none !important;
+    }
+
     body {
       margin: 0;
       min-height: 100vh;
@@ -425,7 +429,14 @@
         if (!res.ok) {
           throw new Error(data.error || '密码不正确');
         }
-        window.location.href = data.redirectTo || '/sub';
+        const targetPath = data.redirectTo || '/sub';
+        if (targetPath === '/sub' || targetPath === '/sub/' || targetPath === window.location.pathname) {
+          input.value = '';
+          showHistory();
+          await loadHistory();
+        } else {
+          window.location.href = targetPath;
+        }
       } catch (e) {
         error.textContent = e.message;
       } finally {