fix break header

vue/src/components/AppNav.vue

@@ -238,7 +238,7 @@ function handleToggleLayout() {
 
 .app-nav__wrapper {
   display: flex;
-  flex-wrap: wrap;
+  flex-wrap: nowrap;
   align-items: center;
   justify-content: space-between;
   gap: 0.5rem;
@@ -246,7 +246,11 @@ function handleToggleLayout() {
 }
 
 .app-nav__title {
-  margin-right: auto;
+  flex: 1 1 auto;
+  min-width: 0;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
   font-weight: bold;
   font-size: clamp(0.95rem, 3.5vw, 1.1rem);
 }
@@ -285,8 +289,10 @@ function handleToggleLayout() {
 }
 
 .app-nav__filter {
+  flex-shrink: 1;
+  min-width: 0;
   min-height: 44px;
-  max-width: clamp(120px, 40vw, 220px);
+  max-width: clamp(90px, 40vw, 220px);
   padding: 0.25rem 0.5rem;
   border: 1px solid var(--color-border);
   border-radius: 4px;
@@ -305,6 +311,7 @@ function handleToggleLayout() {
   display: inline-flex;
   align-items: center;
   justify-content: center;
+  flex-shrink: 0;
   min-height: 44px;
   min-width: 44px;
   padding: 0.5rem;