Fix nested UI scroll behavior

frontend/src/App.vue

@@ -7,10 +7,11 @@ const route = useRoute()
 
 // Hide the sidebar on LaunchView, BatchRunView and WorkflowWorkbench
 const showSidebar = computed(() => route.path !== '/launch' && route.path !== '/batch-run')
+const isHomeRoute = computed(() => route.path === '/')
 </script>
 
 <template>
-  <div class="app-container">
+  <div class="app-container" :class="{ 'home-route': isHomeRoute }">
     <Sidebar v-if="showSidebar" />
     <main class="main-content">
       <router-view />
@@ -25,11 +26,23 @@ const showSidebar = computed(() => route.path !== '/launch' && route.path !== '/
   min-height: 100vh;
 }
 
+.app-container.home-route {
+  height: 100dvh;
+  min-height: 100dvh;
+  overflow: hidden;
+}
+
 .main-content {
   flex: 1;
+  min-height: 0;
   background-color: white;
 }
 
+.home-route .main-content {
+  overflow: hidden;
+  background-color: #1a1a1a;
+}
+
 body {
   margin: 0;
   font-family: system-ui, sans-serif;

frontend/src/components/DynamicFormField.vue

@@ -251,7 +251,16 @@
             autocomplete="off"
           />
           <Teleport to="body">
-            <div v-if="showDropdown && !isReadOnly" class="custom-select-dropdown" :style="dropdownStyle">
+            <div
+              v-if="showDropdown && !isReadOnly"
+              class="custom-select-dropdown"
+              data-local-scroll
+              :style="dropdownStyle"
+              @mousedown.prevent
+              @wheel="handleLocalScrollWheel"
+              @scroll.stop
+              @touchmove.stop
+            >
               <div
                 v-if="!field.required"
                 class="custom-select-option"
@@ -389,7 +398,10 @@
           :id="`${modalId}-${field.name}`"
           :value="formData[field.name]"
           @input="onInput($event.target.value)"
+          @wheel="handleLocalScrollWheel"
+          @scroll.stop
           class="form-textarea"
+          data-local-scroll
           rows="4"
           :readonly="isReadOnly"
           :class="{'input-readonly': isReadOnly}"
@@ -771,6 +783,34 @@ const onFilterInput = (event) => {
   showDropdown.value = true
 }
 
+const handleLocalScrollWheel = (event) => {
+  const target = event.currentTarget
+  if (!target) {
+    return
+  }
+
+  const isDropdown = target.classList.contains('custom-select-dropdown')
+
+  if (target.scrollHeight <= target.clientHeight) {
+    if (isDropdown) {
+      event.stopPropagation()
+      event.preventDefault()
+    }
+    return
+  }
+
+  const isScrollingUp = event.deltaY < 0
+  const isScrollingDown = event.deltaY > 0
+  const atTop = target.scrollTop <= 0
+  const atBottom = Math.ceil(target.scrollTop + target.clientHeight) >= target.scrollHeight
+
+  event.stopPropagation()
+
+  if ((isScrollingUp && atTop) || (isScrollingDown && atBottom)) {
+    event.preventDefault()
+  }
+}
+
 const handleInputBlur = () => {
   // Delay hiding dropdown to allow option selection
   setTimeout(() => {
@@ -897,6 +937,7 @@ const getSelectedLabel = () => {
   box-sizing: border-box;
   min-height: 80px;
   resize: vertical;
+  overscroll-behavior: contain;
   transition: border-color 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease;
 }
 
@@ -1565,6 +1606,7 @@ input:checked + .switch-slider:before {
   z-index: 10000;
   max-height: 200px;
   overflow-y: auto;
+  overscroll-behavior: contain;
   background-color: #1e1e1e;
   border: 1px solid rgba(255, 255, 255, 0.2);
   border-radius: 8px;

frontend/src/components/FormGenerator.vue

@@ -14,7 +14,7 @@
           </div>
           <button class="close-button" @click="closeModal(modal.id)">×</button>
         </div>
-        <div class="modal-body">
+        <div class="modal-body" data-local-scroll @wheel="handleLocalScrollWheel">
           <div
             v-for="field in getMainDisplayFields(modal)"
             :key="field.name + '-' + (modal.formData[field.name]?.type || '')"
@@ -128,7 +128,7 @@
       <div class="modal-header">
         <button class="close-button" @click="closeVarModal">×</button>
       </div>
-      <div class="modal-body">
+      <div class="modal-body" data-local-scroll @wheel="handleLocalScrollWheel">
         <div v-if="varFormError" class="submit-error">
           {{ varFormError }}
         </div>
@@ -169,7 +169,7 @@
         <h3 class="modal-title">{{ editingListItemIndex !== null ? t('form_generator.edit_entry') : t('form_generator.add_entry') }}</h3>
         <button class="close-button" @click="closeListItemModal">×</button>
       </div>
-      <div class="modal-body">
+      <div class="modal-body" data-local-scroll @wheel="handleLocalScrollWheel">
         <div v-if="listItemFormError" class="submit-error">
           {{ listItemFormError }}
         </div>
@@ -1672,6 +1672,29 @@ const submitForm = async (modalId) => {
 }
 
 // Press Enter to submit topmost modal, Esc to close
+const handleLocalScrollWheel = (event) => {
+  const target = event.currentTarget
+  if (!target) {
+    return
+  }
+
+  event.stopPropagation()
+
+  if (target.scrollHeight <= target.clientHeight) {
+    event.preventDefault()
+    return
+  }
+
+  const isScrollingUp = event.deltaY < 0
+  const isScrollingDown = event.deltaY > 0
+  const atTop = target.scrollTop <= 0
+  const atBottom = Math.ceil(target.scrollTop + target.clientHeight) >= target.scrollHeight
+
+  if ((isScrollingUp && atTop) || (isScrollingDown && atBottom)) {
+    event.preventDefault()
+  }
+}
+
 const handleKeystrokes = (event) => {
   if (event.key === 'Enter') {
     // Do not intercept Enter inside textarea to allow newlines
@@ -2140,6 +2163,7 @@ defineExpose({
   padding: 15px 20px 30px 15px;
   max-height: none;
   overflow-y: auto;
+  overscroll-behavior: contain;
   border-top: 1px solid rgba(255, 255, 255, 0.04);
   border-bottom: 1px solid rgba(255, 255, 255, 0.04);
   scrollbar-width: none;

frontend/src/components/RichTooltip.vue

@@ -213,7 +213,11 @@ const calculatePosition = () => {
 }
 
 // Listen to scroll and zoom events to dismiss tooltip
-const handleScroll = () => {
+const handleScroll = (event) => {
+  if (event.target instanceof Element && event.target.closest('[data-local-scroll]')) {
+    return
+  }
+
   if (isVisible.value && !keyboardActive.value) {
     hideTooltip()
   }

frontend/src/components/Sidebar.vue

@@ -48,6 +48,10 @@ const isWorkflowsActive = computed(() => route.path.startsWith('/workflows'))
 
 let lastScrollY = 0
 const handleScroll = (e) => {
+    if (e.target instanceof Element && e.target.closest('[data-local-scroll]')) {
+        return;
+    }
+
     const currentScrollY = e.target.scrollTop || window.scrollY || 0;
     // Minimize small scroll jitters
     if (Math.abs(currentScrollY - lastScrollY) < 5) return;

frontend/src/pages/HomeView.vue

@@ -68,7 +68,7 @@ const cubes = Array.from({ length: 80 }, (_, i) => ({
 <style scoped>
 .home-view {
   width: 100%;
-  min-height: calc(100vh - 55px); /* Match sidebar height to avoid bottom gap */
+  height: 100%;
   background-color: #1a1a1a;
   display: flex;
   justify-content: center;