diff --git a/browser_tests/tests/interaction.spec.ts b/browser_tests/tests/interaction.spec.ts
index 5b54ccaba2..73459065f8 100644
--- a/browser_tests/tests/interaction.spec.ts
+++ b/browser_tests/tests/interaction.spec.ts
@@ -819,16 +819,13 @@ test.describe('Load workflow', { tag: '@screenshot' }, () => {
         await comfyPage.menu.workflowsTab.getOpenedWorkflowNames()
       const activeWorkflowName =
         await comfyPage.menu.workflowsTab.getActiveWorkflowName()
-      const workflowPathA = `${workflowA}.json`
-      const workflowPathB = `${workflowB}.json`
-
       expect(openWorkflows).toEqual(
-        expect.arrayContaining([workflowPathA, workflowPathB])
+        expect.arrayContaining([workflowA, workflowB])
       )
-      expect(openWorkflows.indexOf(workflowPathA)).toBeLessThan(
-        openWorkflows.indexOf(workflowPathB)
+      expect(openWorkflows.indexOf(workflowA)).toBeLessThan(
+        openWorkflows.indexOf(workflowB)
       )
-      expect(activeWorkflowName).toEqual(workflowPathB)
+      expect(activeWorkflowName).toEqual(workflowB)
     })
   })
 
diff --git a/browser_tests/tests/rerouteNode.spec.ts b/browser_tests/tests/rerouteNode.spec.ts
index 93f92d1d50..19c919117c 100644
--- a/browser_tests/tests/rerouteNode.spec.ts
+++ b/browser_tests/tests/rerouteNode.spec.ts
@@ -13,9 +13,9 @@ test.describe('Reroute Node', { tag: ['@screenshot', '@node'] }, () => {
   })
 
   test('loads from inserted workflow', async ({ comfyPage }) => {
-    const workflowName = 'single_connected_reroute_node.json'
+    const workflowName = 'single_connected_reroute_node'
     await comfyPage.workflow.setupWorkflowsDirectory({
-      [workflowName]: 'links/single_connected_reroute_node.json'
+      [`${workflowName}.json`]: `links/${workflowName}.json`
     })
     await comfyPage.setup()
     await comfyPage.menu.topbar.triggerTopbarCommand(['New'])
diff --git a/browser_tests/tests/sidebar/workflows.spec.ts b/browser_tests/tests/sidebar/workflows.spec.ts
index d663b402bc..4b698432e5 100644
--- a/browser_tests/tests/sidebar/workflows.spec.ts
+++ b/browser_tests/tests/sidebar/workflows.spec.ts
@@ -21,14 +21,12 @@ test.describe('Workflows sidebar', () => {
 
   test('Can create new blank workflow', async ({ comfyPage }) => {
     const tab = comfyPage.menu.workflowsTab
-    expect(await tab.getOpenedWorkflowNames()).toEqual([
-      '*Unsaved Workflow.json'
-    ])
+    expect(await tab.getOpenedWorkflowNames()).toEqual(['*Unsaved Workflow'])
 
     await comfyPage.command.executeCommand('Comfy.NewBlankWorkflow')
     expect(await tab.getOpenedWorkflowNames()).toEqual([
-      '*Unsaved Workflow.json',
-      '*Unsaved Workflow (2).json'
+      '*Unsaved Workflow',
+      '*Unsaved Workflow (2)'
     ])
   })
 
@@ -41,37 +39,37 @@ test.describe('Workflows sidebar', () => {
     const tab = comfyPage.menu.workflowsTab
     await tab.open()
     expect(await tab.getTopLevelSavedWorkflowNames()).toEqual(
-      expect.arrayContaining(['workflow1.json', 'workflow2.json'])
+      expect.arrayContaining(['workflow1', 'workflow2'])
     )
   })
 
   test('Can duplicate workflow', async ({ comfyPage }) => {
     const tab = comfyPage.menu.workflowsTab
-    await comfyPage.menu.topbar.saveWorkflow('workflow1.json')
+    await comfyPage.menu.topbar.saveWorkflow('workflow1')
 
     expect(await tab.getTopLevelSavedWorkflowNames()).toEqual(
-      expect.arrayContaining(['workflow1.json'])
+      expect.arrayContaining(['workflow1'])
     )
 
     await comfyPage.command.executeCommand('Comfy.DuplicateWorkflow')
     expect(await tab.getOpenedWorkflowNames()).toEqual([
-      'workflow1.json',
-      '*workflow1 (Copy).json'
+      'workflow1',
+      '*workflow1 (Copy)'
     ])
 
     await comfyPage.command.executeCommand('Comfy.DuplicateWorkflow')
     expect(await tab.getOpenedWorkflowNames()).toEqual([
-      'workflow1.json',
-      '*workflow1 (Copy).json',
-      '*workflow1 (Copy) (2).json'
+      'workflow1',
+      '*workflow1 (Copy)',
+      '*workflow1 (Copy) (2)'
     ])
 
     await comfyPage.command.executeCommand('Comfy.DuplicateWorkflow')
     expect(await tab.getOpenedWorkflowNames()).toEqual([
-      'workflow1.json',
-      '*workflow1 (Copy).json',
-      '*workflow1 (Copy) (2).json',
-      '*workflow1 (Copy) (3).json'
+      'workflow1',
+      '*workflow1 (Copy)',
+      '*workflow1 (Copy) (2)',
+      '*workflow1 (Copy) (3)'
     ])
   })
 
@@ -85,12 +83,12 @@ test.describe('Workflows sidebar', () => {
     await comfyPage.command.executeCommand('Comfy.LoadDefaultWorkflow')
     const originalNodeCount = await comfyPage.nodeOps.getNodeCount()
 
-    await tab.insertWorkflow(tab.getPersistedItem('workflow1.json'))
+    await tab.insertWorkflow(tab.getPersistedItem('workflow1'))
     await expect
       .poll(() => comfyPage.nodeOps.getNodeCount())
       .toEqual(originalNodeCount + 1)
 
-    await tab.getPersistedItem('workflow1.json').click()
+    await tab.getPersistedItem('workflow1').click()
     await expect.poll(() => comfyPage.nodeOps.getNodeCount()).toEqual(1)
   })
 
@@ -113,22 +111,22 @@ test.describe('Workflows sidebar', () => {
     const openedWorkflow = tab.getOpenedItem('foo/bar')
     await tab.renameWorkflow(openedWorkflow, 'foo/baz')
     expect(await tab.getOpenedWorkflowNames()).toEqual([
-      '*Unsaved Workflow.json',
-      'foo/baz.json'
+      '*Unsaved Workflow',
+      'foo/baz'
     ])
   })
 
   test('Can save workflow as', async ({ comfyPage }) => {
     await comfyPage.command.executeCommand('Comfy.NewBlankWorkflow')
-    await comfyPage.menu.topbar.saveWorkflowAs('workflow3.json')
+    await comfyPage.menu.topbar.saveWorkflowAs('workflow3')
     await expect
       .poll(() => comfyPage.menu.workflowsTab.getOpenedWorkflowNames())
-      .toEqual(['*Unsaved Workflow.json', 'workflow3.json'])
+      .toEqual(['*Unsaved Workflow', 'workflow3'])
 
-    await comfyPage.menu.topbar.saveWorkflowAs('workflow4.json')
+    await comfyPage.menu.topbar.saveWorkflowAs('workflow4')
     await expect
       .poll(() => comfyPage.menu.workflowsTab.getOpenedWorkflowNames())
-      .toEqual(['*Unsaved Workflow.json', 'workflow3.json', 'workflow4.json'])
+      .toEqual(['*Unsaved Workflow', 'workflow3', 'workflow4'])
   })
 
   test('Exported workflow does not contain localized slot names', async ({
@@ -184,15 +182,15 @@ test.describe('Workflows sidebar', () => {
   })
 
   test('Can save workflow as with same name', async ({ comfyPage }) => {
-    await comfyPage.menu.topbar.saveWorkflow('workflow5.json')
+    await comfyPage.menu.topbar.saveWorkflow('workflow5')
     expect(await comfyPage.menu.workflowsTab.getOpenedWorkflowNames()).toEqual([
-      'workflow5.json'
+      'workflow5'
     ])
 
-    await comfyPage.menu.topbar.saveWorkflowAs('workflow5.json')
+    await comfyPage.menu.topbar.saveWorkflowAs('workflow5')
     await comfyPage.confirmDialog.click('overwrite')
     expect(await comfyPage.menu.workflowsTab.getOpenedWorkflowNames()).toEqual([
-      'workflow5.json'
+      'workflow5'
     ])
   })
 
@@ -212,25 +210,25 @@ test.describe('Workflows sidebar', () => {
 
   test('Can overwrite other workflows with save as', async ({ comfyPage }) => {
     const topbar = comfyPage.menu.topbar
-    await topbar.saveWorkflow('workflow1.json')
-    await topbar.saveWorkflowAs('workflow2.json')
+    await topbar.saveWorkflow('workflow1')
+    await topbar.saveWorkflowAs('workflow2')
     await comfyPage.nextFrame()
     await expect
       .poll(() => comfyPage.menu.workflowsTab.getOpenedWorkflowNames())
-      .toEqual(['workflow1.json', 'workflow2.json'])
+      .toEqual(['workflow1', 'workflow2'])
     await expect
       .poll(() => comfyPage.menu.workflowsTab.getActiveWorkflowName())
-      .toEqual('workflow2.json')
+      .toEqual('workflow2')
 
-    await topbar.saveWorkflowAs('workflow1.json')
+    await topbar.saveWorkflowAs('workflow1')
     await comfyPage.confirmDialog.click('overwrite')
-    // The old workflow1.json should be deleted and the new one should be saved.
+    // The old workflow1 should be deleted and the new one should be saved.
     await expect
       .poll(() => comfyPage.menu.workflowsTab.getOpenedWorkflowNames())
-      .toEqual(['workflow2.json', 'workflow1.json'])
+      .toEqual(['workflow2', 'workflow1'])
     await expect
       .poll(() => comfyPage.menu.workflowsTab.getActiveWorkflowName())
-      .toEqual('workflow1.json')
+      .toEqual('workflow1')
   })
 
   test('Does not report warning when switching between opened workflows', async ({
@@ -266,17 +264,15 @@ test.describe('Workflows sidebar', () => {
     )
     await closeButton.click()
     expect(await comfyPage.menu.workflowsTab.getOpenedWorkflowNames()).toEqual([
-      '*Unsaved Workflow.json'
+      '*Unsaved Workflow'
     ])
   })
 
   test('Can close saved workflow with command', async ({ comfyPage }) => {
     const tab = comfyPage.menu.workflowsTab
-    await comfyPage.menu.topbar.saveWorkflow('workflow1.json')
+    await comfyPage.menu.topbar.saveWorkflow('workflow1')
     await comfyPage.command.executeCommand('Workspace.CloseWorkflow')
-    expect(await tab.getOpenedWorkflowNames()).toEqual([
-      '*Unsaved Workflow.json'
-    ])
+    expect(await tab.getOpenedWorkflowNames()).toEqual(['*Unsaved Workflow'])
   })
 
   test('Can delete workflows (confirm disabled)', async ({ comfyPage }) => {
@@ -284,7 +280,7 @@ test.describe('Workflows sidebar', () => {
 
     const { topbar, workflowsTab } = comfyPage.menu
 
-    const filename = 'workflow18.json'
+    const filename = 'workflow18'
     await topbar.saveWorkflow(filename)
     expect(await workflowsTab.getOpenedWorkflowNames()).toEqual([filename])
 
@@ -295,14 +291,14 @@ test.describe('Workflows sidebar', () => {
 
     await expect(workflowsTab.getOpenedItem(filename)).not.toBeVisible()
     expect(await workflowsTab.getOpenedWorkflowNames()).toEqual([
-      '*Unsaved Workflow.json'
+      '*Unsaved Workflow'
     ])
   })
 
   test('Can delete workflows', async ({ comfyPage }) => {
     const { topbar, workflowsTab } = comfyPage.menu
 
-    const filename = 'workflow18.json'
+    const filename = 'workflow18'
     await topbar.saveWorkflow(filename)
     expect(await workflowsTab.getOpenedWorkflowNames()).toEqual([filename])
 
@@ -314,7 +310,7 @@ test.describe('Workflows sidebar', () => {
 
     await expect(workflowsTab.getOpenedItem(filename)).not.toBeVisible()
     expect(await workflowsTab.getOpenedWorkflowNames()).toEqual([
-      '*Unsaved Workflow.json'
+      '*Unsaved Workflow'
     ])
   })
 
@@ -326,13 +322,11 @@ test.describe('Workflows sidebar', () => {
     const { workflowsTab } = comfyPage.menu
     await workflowsTab.open()
 
-    await workflowsTab
-      .getPersistedItem('workflow1.json')
-      .click({ button: 'right' })
+    await workflowsTab.getPersistedItem('workflow1').click({ button: 'right' })
     await comfyPage.contextMenu.clickMenuItem('Duplicate')
     await expect
       .poll(() => workflowsTab.getOpenedWorkflowNames())
-      .toEqual(['*Unsaved Workflow.json', '*workflow1 (Copy).json'])
+      .toEqual(['*Unsaved Workflow', '*workflow1 (Copy)'])
   })
 
   test('Can drop workflow from workflows sidebar', async ({ comfyPage }) => {
@@ -344,7 +338,7 @@ test.describe('Workflows sidebar', () => {
 
     // Wait for workflow to appear in Browse section after sync
     const workflowItem =
-      comfyPage.menu.workflowsTab.getPersistedItem('workflow1.json')
+      comfyPage.menu.workflowsTab.getPersistedItem('workflow1')
     await expect(workflowItem).toBeVisible({ timeout: 3000 })
 
     const nodeCount = await comfyPage.nodeOps.getGraphNodesCount()
@@ -361,7 +355,7 @@ test.describe('Workflows sidebar', () => {
     }
 
     await comfyPage.page.dragAndDrop(
-      '.comfyui-workflows-browse .node-label:has-text("workflow1.json")',
+      '.comfyui-workflows-browse .node-label:has-text("workflow1")',
       '#graph-canvas',
       { targetPosition }
     )
diff --git a/src/components/builder/AppBuilder.vue b/src/components/builder/AppBuilder.vue
index eec084b203..68d0f512cb 100644
--- a/src/components/builder/AppBuilder.vue
+++ b/src/components/builder/AppBuilder.vue
@@ -204,131 +204,145 @@ const renderedInputs = computed<[string, MaybeRef<BoundStyle> | undefined][]>(
 )
 </script>
 <template>
-  <div class="flex items-center border-b border-border-subtle p-2 font-bold">
-    {{
-      isArrangeMode ? t('nodeHelpPage.inputs') : t('linearMode.builder.title')
-    }}
-  </div>
-  <DraggableList
-    v-if="isArrangeMode"
-    v-slot="{ dragClass }"
-    v-model="appModeStore.selectedInputs"
-  >
-    <div
-      v-for="{ nodeId, widgetName, node, widget } in arrangeInputs"
-      :key="`${nodeId}: ${widgetName}`"
-      :class="cn(dragClass, 'pointer-events-auto my-2 p-2')"
-      :aria-label="`${widget?.label ?? widgetName} — ${node.title}`"
-    >
-      <div v-if="widget" class="pointer-events-none" inert>
-        <WidgetItem
-          :widget="widget"
-          :node="node"
-          show-node-name
-          hidden-widget-actions
-        />
-      </div>
-      <div v-else class="pointer-events-none p-1 text-sm text-muted-foreground">
-        {{ widgetName }}
-        <p class="text-xs italic">
-          ({{ t('linearMode.builder.unknownWidget') }})
-        </p>
-      </div>
+  <div class="flex h-full flex-col">
+    <div class="flex items-center border-b border-border-subtle p-2 font-bold">
+      {{
+        isArrangeMode ? t('nodeHelpPage.inputs') : t('linearMode.builder.title')
+      }}
     </div>
-  </DraggableList>
-  <PropertiesAccordionItem
-    v-if="isSelectInputsMode"
-    :label="t('nodeHelpPage.inputs')"
-    enable-empty-state
-    :disabled="!appModeStore.selectedInputs.length"
-    class="border-b border-border-subtle"
-    :tooltip="`${t('linearMode.builder.inputsDesc')}\n${t('linearMode.builder.inputsExample')}`"
-    :tooltip-delay="100"
-  >
-    <template #label>
-      <div class="flex gap-3">
-        {{ t('nodeHelpPage.inputs') }}
-        <i class="icon-[lucide--circle-alert] bg-muted-foreground" />
-      </div>
-    </template>
-    <template #empty>
-      <div
-        class="w-full p-4 pt-2 text-muted-foreground"
-        v-text="t('linearMode.builder.promptAddInputs')"
-      />
-    </template>
-    <div
-      class="w-full p-4 pt-2 text-muted-foreground"
-      v-text="t('linearMode.builder.promptAddInputs')"
-    />
-    <DraggableList v-slot="{ dragClass }" v-model="appModeStore.selectedInputs">
-      <IoItem
-        v-for="{
-          nodeId,
-          widgetName,
-          label,
-          subLabel,
-          rename
-        } in inputsWithState"
-        :key="`${nodeId}: ${widgetName}`"
-        :class="cn(dragClass, 'my-2 rounded-lg bg-primary-background/30 p-2')"
-        :title="label ?? widgetName"
-        :sub-title="subLabel"
-        :rename
-        :remove="
-          () =>
-            remove(
-              appModeStore.selectedInputs,
-              ([id, name]) => nodeId == id && widgetName === name
-            )
-        "
-      />
-    </DraggableList>
-  </PropertiesAccordionItem>
-  <PropertiesAccordionItem
-    v-if="isSelectOutputsMode"
-    :label="t('nodeHelpPage.outputs')"
-    enable-empty-state
-    :disabled="!appModeStore.selectedOutputs.length"
-    :tooltip="`${t('linearMode.builder.outputsDesc')}\n${t('linearMode.builder.outputsExample')}`"
-    :tooltip-delay="100"
-  >
-    <template #label>
-      <div class="flex gap-3">
-        {{ t('nodeHelpPage.outputs') }}
-        <i class="icon-[lucide--circle-alert] bg-muted-foreground" />
-      </div>
-    </template>
-    <template #empty>
-      <div
-        class="w-full p-4 pt-2 text-muted-foreground"
-        v-text="t('linearMode.builder.promptAddOutputs')"
-      />
-    </template>
-    <div
-      class="w-full p-4 pt-2 text-muted-foreground"
-      v-text="t('linearMode.builder.promptAddOutputs')"
-    />
-    <DraggableList
-      v-slot="{ dragClass }"
-      v-model="appModeStore.selectedOutputs"
-    >
-      <IoItem
-        v-for="([key, title], index) in outputsWithState"
-        :key
-        :class="
-          cn(
-            dragClass,
-            'my-2 rounded-lg bg-warning-background/40 p-2',
-            index === 0 && 'ring-2 ring-warning-background'
-          )
-        "
-        :title
-        :sub-title="String(key)"
-        :remove="() => remove(appModeStore.selectedOutputs, (k) => k == key)"
-      />
-    </DraggableList>
-  </PropertiesAccordionItem>
+    <div class="min-h-0 flex-1 overflow-y-auto">
+      <DraggableList
+        v-if="isArrangeMode"
+        v-slot="{ dragClass }"
+        v-model="appModeStore.selectedInputs"
+      >
+        <div
+          v-for="{ nodeId, widgetName, node, widget } in arrangeInputs"
+          :key="`${nodeId}: ${widgetName}`"
+          :class="cn(dragClass, 'pointer-events-auto my-2 p-2')"
+          :aria-label="`${widget?.label ?? widgetName} — ${node.title}`"
+        >
+          <div v-if="widget" class="pointer-events-none" inert>
+            <WidgetItem
+              :widget="widget"
+              :node="node"
+              show-node-name
+              hidden-widget-actions
+            />
+          </div>
+          <div
+            v-else
+            class="pointer-events-none p-1 text-sm text-muted-foreground"
+          >
+            {{ widgetName }}
+            <p class="text-xs italic">
+              ({{ t('linearMode.builder.unknownWidget') }})
+            </p>
+          </div>
+        </div>
+      </DraggableList>
+      <PropertiesAccordionItem
+        v-if="isSelectInputsMode"
+        :label="t('nodeHelpPage.inputs')"
+        enable-empty-state
+        :disabled="!appModeStore.selectedInputs.length"
+        class="border-b border-border-subtle"
+        :tooltip="`${t('linearMode.builder.inputsDesc')}\n${t('linearMode.builder.inputsExample')}`"
+        :tooltip-delay="100"
+      >
+        <template #label>
+          <div class="flex gap-3">
+            {{ t('nodeHelpPage.inputs') }}
+            <i class="icon-[lucide--circle-alert] bg-muted-foreground" />
+          </div>
+        </template>
+        <template #empty>
+          <div
+            class="w-full p-4 pt-2 text-muted-foreground"
+            v-text="t('linearMode.builder.promptAddInputs')"
+          />
+        </template>
+        <div
+          class="w-full p-4 pt-2 text-muted-foreground"
+          v-text="t('linearMode.builder.promptAddInputs')"
+        />
+        <DraggableList
+          v-slot="{ dragClass }"
+          v-model="appModeStore.selectedInputs"
+        >
+          <IoItem
+            v-for="{
+              nodeId,
+              widgetName,
+              label,
+              subLabel,
+              rename
+            } in inputsWithState"
+            :key="`${nodeId}: ${widgetName}`"
+            :class="
+              cn(dragClass, 'my-2 rounded-lg bg-primary-background/30 p-2')
+            "
+            :title="label ?? widgetName"
+            :sub-title="subLabel"
+            :rename
+            :remove="
+              () =>
+                remove(
+                  appModeStore.selectedInputs,
+                  ([id, name]) => nodeId == id && widgetName === name
+                )
+            "
+          />
+        </DraggableList>
+      </PropertiesAccordionItem>
+      <PropertiesAccordionItem
+        v-if="isSelectOutputsMode"
+        :label="t('nodeHelpPage.outputs')"
+        enable-empty-state
+        :disabled="!appModeStore.selectedOutputs.length"
+        :tooltip="`${t('linearMode.builder.outputsDesc')}\n${t('linearMode.builder.outputsExample')}`"
+        :tooltip-delay="100"
+      >
+        <template #label>
+          <div class="flex gap-3">
+            {{ t('nodeHelpPage.outputs') }}
+            <i class="icon-[lucide--circle-alert] bg-muted-foreground" />
+          </div>
+        </template>
+        <template #empty>
+          <div
+            class="w-full p-4 pt-2 text-muted-foreground"
+            v-text="t('linearMode.builder.promptAddOutputs')"
+          />
+        </template>
+        <div
+          class="w-full p-4 pt-2 text-muted-foreground"
+          v-text="t('linearMode.builder.promptAddOutputs')"
+        />
+        <DraggableList
+          v-slot="{ dragClass }"
+          v-model="appModeStore.selectedOutputs"
+        >
+          <IoItem
+            v-for="([key, title], index) in outputsWithState"
+            :key
+            :class="
+              cn(
+                dragClass,
+                'my-2 rounded-lg bg-warning-background/40 p-2',
+                index === 0 && 'ring-2 ring-warning-background'
+              )
+            "
+            :title
+            :sub-title="String(key)"
+            :remove="
+              () => remove(appModeStore.selectedOutputs, (k) => k == key)
+            "
+          />
+        </DraggableList>
+      </PropertiesAccordionItem>
+    </div>
+  </div>
 
   <Teleport
     v-if="isSelectMode && !settingStore.get('Comfy.VueNodes.Enabled')"
diff --git a/src/components/builder/BuilderMenu.vue b/src/components/builder/BuilderMenu.vue
index 8eea6d95af..cc23990845 100644
--- a/src/components/builder/BuilderMenu.vue
+++ b/src/components/builder/BuilderMenu.vue
@@ -19,38 +19,31 @@
       </button>
     </template>
     <template #default="{ close }">
-      <button
-        :class="
-          cn(
-            'flex w-full items-center gap-3 rounded-md border-none bg-transparent px-3 py-2 text-sm',
-            hasOutputs
-              ? 'cursor-pointer hover:bg-secondary-background-hover'
-              : 'pointer-events-none opacity-50'
-          )
-        "
-        :disabled="!hasOutputs"
-        @click="onSave(close)"
-      >
-        <i class="icon-[lucide--save] size-4" />
-        {{ t('g.save') }}
-      </button>
-      <div class="my-1 border-t border-border-default" />
-      <button
-        class="flex w-full cursor-pointer items-center gap-3 rounded-md border-none bg-transparent px-3 py-2 text-sm hover:bg-secondary-background-hover"
-        @click="onExitBuilder(close)"
-      >
-        <i class="icon-[lucide--square-pen] size-4" />
-        {{ t('builderMenu.exitAppBuilder') }}
-      </button>
+      <template v-for="(item, index) in menuItems" :key="item.label">
+        <div v-if="index > 0" class="my-1 border-t border-border-default" />
+        <Button
+          variant="textonly"
+          size="unset"
+          class="flex w-full items-center justify-start gap-3 rounded-md px-3 py-2 text-sm"
+          :disabled="item.disabled"
+          @click="item.action(close)"
+        >
+          <i :class="cn(item.icon, 'size-4')" />
+          {{ item.label }}
+        </Button>
+      </template>
     </template>
   </Popover>
 </template>
 
 <script setup lang="ts">
+import { computed } from 'vue'
 import { storeToRefs } from 'pinia'
 import { useI18n } from 'vue-i18n'
 
+import Button from '@/components/ui/button/Button.vue'
 import Popover from '@/components/ui/Popover.vue'
+import { useAppMode } from '@/composables/useAppMode'
 import { useErrorHandling } from '@/composables/useErrorHandling'
 import { useWorkflowService } from '@/platform/workflow/core/services/workflowService'
 import { useWorkflowStore } from '@/platform/workflow/management/stores/workflowStore'
@@ -60,10 +53,30 @@ import { cn } from '@/utils/tailwindUtil'
 const { t } = useI18n()
 const appModeStore = useAppModeStore()
 const { hasOutputs } = storeToRefs(appModeStore)
+const { setMode } = useAppMode()
 const workflowService = useWorkflowService()
 const workflowStore = useWorkflowStore()
 const { toastErrorHandler } = useErrorHandling()
 
+const menuItems = computed(() => [
+  {
+    label: t('g.save'),
+    icon: 'icon-[lucide--save]',
+    disabled: !hasOutputs.value,
+    action: onSave
+  },
+  {
+    label: t('builderMenu.enterAppMode'),
+    icon: 'icon-[lucide--panels-top-left]',
+    action: onEnterAppMode
+  },
+  {
+    label: t('builderMenu.exitAppBuilder'),
+    icon: 'icon-[lucide--square-pen]',
+    action: onExitBuilder
+  }
+])
+
 async function onSave(close: () => void) {
   const workflow = workflowStore.activeWorkflow
   if (!workflow) return
@@ -75,6 +88,11 @@ async function onSave(close: () => void) {
   }
 }
 
+function onEnterAppMode(close: () => void) {
+  setMode('app')
+  close()
+}
+
 function onExitBuilder(close: () => void) {
   void appModeStore.exitBuilder()
   close()
diff --git a/src/components/sidebar/tabs/AppsSidebarTab.vue b/src/components/sidebar/tabs/AppsSidebarTab.vue
index 3dbe6cdd0f..9a3a4bc3d7 100644
--- a/src/components/sidebar/tabs/AppsSidebarTab.vue
+++ b/src/components/sidebar/tabs/AppsSidebarTab.vue
@@ -2,7 +2,6 @@
   <BaseWorkflowsSidebarTab
     :title="$t('linearMode.appModeToolbar.apps')"
     :filter="isAppWorkflow"
-    :label-transform="stripAppJsonSuffix"
     hide-leaf-icon
     :search-subject="$t('linearMode.appModeToolbar.apps')"
     data-testid="apps-sidebar"
@@ -18,8 +17,14 @@
       <NoResultsPlaceholder
         button-variant="secondary"
         text-class="text-muted-foreground text-sm"
-        :message="$t('linearMode.appModeToolbar.appsEmptyMessage')"
-        :button-label="$t('linearMode.appModeToolbar.enterAppMode')"
+        :message="
+          isAppMode
+            ? $t('linearMode.appModeToolbar.appsEmptyMessage')
+            : `${$t('linearMode.appModeToolbar.appsEmptyMessage')}\n${$t('linearMode.appModeToolbar.appsEmptyMessageAction')}`
+        "
+        :button-label="
+          isAppMode ? undefined : $t('linearMode.appModeToolbar.enterAppMode')
+        "
         @action="enterAppMode"
       />
     </template>
@@ -32,16 +37,12 @@ import BaseWorkflowsSidebarTab from '@/components/sidebar/tabs/BaseWorkflowsSide
 import { useAppMode } from '@/composables/useAppMode'
 import type { ComfyWorkflow } from '@/platform/workflow/management/stores/workflowStore'
 
-const { setMode } = useAppMode()
+const { isAppMode, setMode } = useAppMode()
 
 function isAppWorkflow(workflow: ComfyWorkflow): boolean {
   return workflow.suffix === 'app.json'
 }
 
-function stripAppJsonSuffix(label: string): string {
-  return label.replace(/\.app\.json$/i, '')
-}
-
 function enterAppMode() {
   setMode('app')
 }
diff --git a/src/components/sidebar/tabs/BaseWorkflowsSidebarTab.vue b/src/components/sidebar/tabs/BaseWorkflowsSidebarTab.vue
index abb03b1fac..c3de2c89bf 100644
--- a/src/components/sidebar/tabs/BaseWorkflowsSidebarTab.vue
+++ b/src/components/sidebar/tabs/BaseWorkflowsSidebarTab.vue
@@ -154,6 +154,7 @@ import SidebarTabTemplate from '@/components/sidebar/tabs/SidebarTabTemplate.vue
 import WorkflowTreeLeaf from '@/components/sidebar/tabs/workflows/WorkflowTreeLeaf.vue'
 import Button from '@/components/ui/button/Button.vue'
 import { useTreeExpansion } from '@/composables/useTreeExpansion'
+import { useAppMode } from '@/composables/useAppMode'
 import { useSettingStore } from '@/platform/settings/settingStore'
 import { useWorkflowService } from '@/platform/workflow/core/services/workflowService'
 import {
@@ -163,26 +164,23 @@ import {
 } from '@/platform/workflow/management/stores/workflowStore'
 import { useWorkspaceStore } from '@/stores/workspaceStore'
 import type { TreeExplorerNode, TreeNode } from '@/types/treeExplorerTypes'
-import { ensureWorkflowSuffix, getWorkflowSuffix } from '@/utils/formatUtil'
+import {
+  ensureWorkflowSuffix,
+  getFilenameDetails,
+  getWorkflowSuffix
+} from '@/utils/formatUtil'
 import { buildTree, sortedTree } from '@/utils/treeUtil'
 
-const {
-  title,
-  filter,
-  searchSubject,
-  dataTestid,
-  labelTransform,
-  hideLeafIcon
-} = defineProps<{
+const { title, filter, searchSubject, dataTestid, hideLeafIcon } = defineProps<{
   title: string
   filter?: (workflow: ComfyWorkflow) => boolean
   searchSubject: string
   dataTestid: string
-  labelTransform?: (label: string) => string
   hideLeafIcon?: boolean
 }>()
 
 const { t } = useI18n()
+const { isAppMode } = useAppMode()
 
 const applyFilter = (workflows: ComfyWorkflow[]) =>
   filter ? workflows.filter(filter) : workflows
@@ -304,14 +302,18 @@ const renderTreeNode = (
             },
         contextMenuItems() {
           return [
-            {
-              label: t('g.insert'),
-              icon: 'pi pi-file-export',
-              command: async () => {
-                const workflow = node.data
-                await workflowService.insertWorkflow(workflow)
-              }
-            },
+            ...(isAppMode.value
+              ? []
+              : [
+                  {
+                    label: t('g.insert'),
+                    icon: 'pi pi-file-export',
+                    command: async () => {
+                      const workflow = node.data
+                      await workflowService.insertWorkflow(workflow)
+                    }
+                  }
+                ]),
             {
               label: t('g.duplicate'),
               icon: 'pi pi-file-export',
@@ -326,8 +328,7 @@ const renderTreeNode = (
       }
     : { handleClick }
 
-  const label =
-    node.leaf && labelTransform ? labelTransform(node.label) : node.label
+  const label = node.leaf ? getFilenameDetails(node.label).filename : node.label
 
   return {
     key: node.key,
diff --git a/src/composables/useStablePrimeVueSplitterSizer.test.ts b/src/composables/useStablePrimeVueSplitterSizer.test.ts
new file mode 100644
index 0000000000..05ce12df33
--- /dev/null
+++ b/src/composables/useStablePrimeVueSplitterSizer.test.ts
@@ -0,0 +1,133 @@
+import type { SplitterResizeEndEvent } from 'primevue/splitter'
+
+import { nextTick, ref } from 'vue'
+import { describe, expect, it, vi } from 'vitest'
+
+import { useStablePrimeVueSplitterSizer } from './useStablePrimeVueSplitterSizer'
+
+vi.mock('@vueuse/core', async (importOriginal) => {
+  const actual = await importOriginal()
+  return {
+    ...(actual as object),
+    useStorage: <T>(_key: string, defaultValue: T) => ref(defaultValue)
+  }
+})
+
+function createPanel(width: number) {
+  const el = document.createElement('div')
+  Object.defineProperty(el, 'offsetWidth', { value: width })
+  return ref(el)
+}
+
+function resizeEndEvent(): SplitterResizeEndEvent {
+  return { originalEvent: new Event('mouseup'), sizes: [] }
+}
+
+async function flushWatcher() {
+  await nextTick()
+  await nextTick()
+}
+
+describe('useStablePrimeVueSplitterSizer', () => {
+  it('captures pixel widths on resize end and applies on trigger', async () => {
+    const panelRef = createPanel(400)
+    const trigger = ref(0)
+
+    const { onResizeEnd } = useStablePrimeVueSplitterSizer(
+      [{ ref: panelRef, storageKey: 'test-capture' }],
+      [trigger]
+    )
+    await flushWatcher()
+
+    onResizeEnd(resizeEndEvent())
+
+    trigger.value++
+    await flushWatcher()
+
+    expect(panelRef.value!.style.flexBasis).toBe('400px')
+    expect(panelRef.value!.style.flexGrow).toBe('0')
+    expect(panelRef.value!.style.flexShrink).toBe('0')
+  })
+
+  it('does not apply styles when no stored width exists', async () => {
+    const panelRef = createPanel(300)
+    const trigger = ref(0)
+
+    useStablePrimeVueSplitterSizer(
+      [{ ref: panelRef, storageKey: 'test-no-stored' }],
+      [trigger]
+    )
+    await flushWatcher()
+
+    expect(panelRef.value!.style.flexBasis).toBe('')
+  })
+
+  it('re-applies stored widths when watch sources change', async () => {
+    const panelRef = createPanel(500)
+    const trigger = ref(0)
+
+    const { onResizeEnd } = useStablePrimeVueSplitterSizer(
+      [{ ref: panelRef, storageKey: 'test-reapply' }],
+      [trigger]
+    )
+    await flushWatcher()
+
+    onResizeEnd(resizeEndEvent())
+
+    panelRef.value!.style.flexBasis = ''
+    panelRef.value!.style.flexGrow = ''
+    panelRef.value!.style.flexShrink = ''
+
+    trigger.value++
+    await flushWatcher()
+
+    expect(panelRef.value!.style.flexBasis).toBe('500px')
+    expect(panelRef.value!.style.flexGrow).toBe('0')
+    expect(panelRef.value!.style.flexShrink).toBe('0')
+  })
+
+  it('handles multiple panels independently', async () => {
+    const leftRef = createPanel(300)
+    const rightRef = createPanel(250)
+    const trigger = ref(0)
+
+    const { onResizeEnd } = useStablePrimeVueSplitterSizer(
+      [
+        { ref: leftRef, storageKey: 'test-multi-left' },
+        { ref: rightRef, storageKey: 'test-multi-right' }
+      ],
+      [trigger]
+    )
+    await flushWatcher()
+
+    onResizeEnd(resizeEndEvent())
+
+    trigger.value++
+    await flushWatcher()
+
+    expect(leftRef.value!.style.flexBasis).toBe('300px')
+    expect(rightRef.value!.style.flexBasis).toBe('250px')
+  })
+
+  it('skips panels with null refs', async () => {
+    const nullRef = ref(null)
+    const validRef = createPanel(200)
+    const trigger = ref(0)
+
+    const { onResizeEnd } = useStablePrimeVueSplitterSizer(
+      [
+        { ref: nullRef, storageKey: 'test-null' },
+        { ref: validRef, storageKey: 'test-valid' }
+      ],
+      [trigger]
+    )
+    await flushWatcher()
+
+    onResizeEnd(resizeEndEvent())
+
+    trigger.value++
+    await flushWatcher()
+
+    expect(validRef.value!.style.flexBasis).toBe('200px')
+  })
+})
diff --git a/src/composables/useStablePrimeVueSplitterSizer.ts b/src/composables/useStablePrimeVueSplitterSizer.ts
new file mode 100644
index 0000000000..06ab0860de
--- /dev/null
+++ b/src/composables/useStablePrimeVueSplitterSizer.ts
@@ -0,0 +1,64 @@
+import type { SplitterResizeEndEvent } from 'primevue/splitter'
+import type { WatchSource } from 'vue'
+
+import { unrefElement, useStorage } from '@vueuse/core'
+import type { MaybeComputedElementRef } from '@vueuse/core'
+import { nextTick, watch } from 'vue'
+
+interface PanelConfig {
+  ref: MaybeComputedElementRef
+  storageKey: string
+}
+
+/**
+ * Works around PrimeVue Splitter not properly initializing flexBasis
+ * when panels are conditionally rendered. Captures pixel widths on
+ * resize end and re-applies them as rigid flex values (flex: 0 0 Xpx)
+ * when watched sources change (e.g. tab switch, panel toggle).
+ *
+ * @param panels - array of panel configs with template ref and storage key
+ * @param watchSources - reactive sources that trigger re-application
+ */
+export function useStablePrimeVueSplitterSizer(
+  panels: PanelConfig[],
+  watchSources: WatchSource[]
+) {
+  const storedWidths = panels.map((panel) => ({
+    ref: panel.ref,
+    width: useStorage<number | null>(panel.storageKey, null)
+  }))
+
+  function resolveElement(
+    ref: MaybeComputedElementRef
+  ): HTMLElement | undefined {
+    return unrefElement(ref) as HTMLElement | undefined
+  }
+
+  function applyStoredWidths() {
+    for (const { ref, width } of storedWidths) {
+      const el = resolveElement(ref)
+      if (!el || width.value === null) continue
+      el.style.flexBasis = `${width.value}px`
+      el.style.flexGrow = '0'
+      el.style.flexShrink = '0'
+    }
+  }
+
+  function onResizeEnd(_event: SplitterResizeEndEvent) {
+    for (const { ref, width } of storedWidths) {
+      const el = resolveElement(ref)
+      if (el) width.value = el.offsetWidth
+    }
+  }
+
+  watch(
+    watchSources,
+    async () => {
+      await nextTick()
+      applyStoredWidths()
+    },
+    { immediate: true }
+  )
+
+  return { onResizeEnd }
+}
diff --git a/src/locales/en/main.json b/src/locales/en/main.json
index 3cdf0e0a67..f8fdb27ff9 100644
--- a/src/locales/en/main.json
+++ b/src/locales/en/main.json
@@ -3160,12 +3160,13 @@
     "runCount": "Number of runs",
     "rerun": "Rerun",
     "reuseParameters": "Reuse Parameters",
-    "downloadAll": "Download All",
+    "downloadAll": "Download {count} assets from this run",
     "viewJob": "View Job",
     "enterNodeGraph": "Enter node graph",
     "emptyWorkflowExplanation": "Your workflow is empty. You need some nodes first to start building an app.",
     "backToWorkflow": "Back to workflow",
     "loadTemplate": "Load a template",
+    "cancelThisRun": "Cancel this run",
     "welcome": {
       "title": "App Mode",
       "message": "A simplified view that hides the node graph so you can focus on creating.",
@@ -3177,7 +3178,8 @@
     "appModeToolbar": {
       "appBuilder": "App builder",
       "apps": "Apps",
-      "appsEmptyMessage": "Saved apps will show up here.\nClick below to build your first app.",
+      "appsEmptyMessage": "Saved apps will show up here.",
+      "appsEmptyMessageAction": "Click below to build your first app.",
       "enterAppMode": "Enter app mode"
     },
     "arrange": {
@@ -3519,6 +3521,7 @@
     "emptyWorkflowPrompt": "Do you want to start with a template?"
   },
   "builderMenu": {
+    "enterAppMode": "Enter app mode",
     "exitAppBuilder": "Exit app builder"
   }
 }
diff --git a/src/renderer/extensions/linearMode/ImagePreview.vue b/src/renderer/extensions/linearMode/ImagePreview.vue
index 6c920ffe09..3cb6c6a5b9 100644
--- a/src/renderer/extensions/linearMode/ImagePreview.vue
+++ b/src/renderer/extensions/linearMode/ImagePreview.vue
@@ -2,6 +2,9 @@
 import { ref, useTemplateRef } from 'vue'
 
 import ZoomPane from '@/components/ui/ZoomPane.vue'
+import { cn } from '@/utils/tailwindUtil'
+
+defineOptions({ inheritAttrs: false })
 
 const { src } = defineProps<{
   src: string
@@ -13,7 +16,11 @@ const width = ref('')
 const height = ref('')
 </script>
 <template>
-  <ZoomPane v-if="!mobile" v-slot="slotProps" class="w-full flex-1">
+  <ZoomPane
+    v-if="!mobile"
+    v-slot="slotProps"
+    :class="cn('w-full flex-1', $attrs.class as string)"
+  >
     <img
       ref="imageRef"
       :src
diff --git a/src/renderer/extensions/linearMode/LinearArrange.vue b/src/renderer/extensions/linearMode/LinearArrange.vue
index 0e8e9b1021..7a913ff055 100644
--- a/src/renderer/extensions/linearMode/LinearArrange.vue
+++ b/src/renderer/extensions/linearMode/LinearArrange.vue
@@ -1,18 +1,43 @@
 <script setup lang="ts">
+import { computed } from 'vue'
 import { useI18n } from 'vue-i18n'
-import { useAppMode } from '@/composables/useAppMode'
-import { useAppModeStore } from '@/stores/appModeStore'
-import Button from '@/components/ui/button/Button.vue'
 import { storeToRefs } from 'pinia'
 
+import Button from '@/components/ui/button/Button.vue'
+import { useAppMode } from '@/composables/useAppMode'
+import { flattenNodeOutput } from '@/renderer/extensions/linearMode/flattenNodeOutput'
+import MediaOutputPreview from '@/renderer/extensions/linearMode/MediaOutputPreview.vue'
+import { useAppModeStore } from '@/stores/appModeStore'
+import { useNodeOutputStore } from '@/stores/nodeOutputStore'
+import { useWorkflowStore } from '@/platform/workflow/management/stores/workflowStore'
+
 const { t } = useI18n()
 const { setMode } = useAppMode()
-const { hasOutputs } = storeToRefs(useAppModeStore())
+const appModeStore = useAppModeStore()
+const { hasOutputs } = storeToRefs(appModeStore)
+const nodeOutputStore = useNodeOutputStore()
+const { nodeIdToNodeLocatorId } = useWorkflowStore()
+
+const existingOutput = computed(() => {
+  for (const nodeId of appModeStore.selectedOutputs) {
+    const locatorId = nodeIdToNodeLocatorId(nodeId)
+    const nodeOutput = nodeOutputStore.nodeOutputs[locatorId]
+    if (!nodeOutput) continue
+    const results = flattenNodeOutput([nodeId, nodeOutput])
+    if (results.length > 0) return results[0]
+  }
+  return undefined
+})
 </script>
 
 <template>
+  <MediaOutputPreview
+    v-if="existingOutput"
+    :output="existingOutput"
+    class="px-12 py-24"
+  />
   <div
-    v-if="hasOutputs"
+    v-else-if="hasOutputs"
     role="article"
     data-testid="arrange-preview"
     class="mx-auto flex h-full w-3/4 flex-col items-center justify-center gap-6 p-8"
@@ -23,7 +48,7 @@ const { hasOutputs } = storeToRefs(useAppModeStore())
       <p class="mb-0 font-bold text-base-foreground">
         {{ t('linearMode.arrange.outputs') }}
       </p>
-      <p>{{ t('linearMode.arrange.resultsLabel') }}</p>
+      <p class="text-center">{{ t('linearMode.arrange.resultsLabel') }}</p>
     </div>
   </div>
   <div
diff --git a/src/renderer/extensions/linearMode/LinearPreview.vue b/src/renderer/extensions/linearMode/LinearPreview.vue
index 78045d368a..527a520a3d 100644
--- a/src/renderer/extensions/linearMode/LinearPreview.vue
+++ b/src/renderer/extensions/linearMode/LinearPreview.vue
@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { defineAsyncComponent, ref } from 'vue'
+import { ref } from 'vue'
 import { useI18n } from 'vue-i18n'
 
 import { downloadFile } from '@/base/common/downloadUtil'
@@ -15,23 +15,15 @@ import LatentPreview from '@/renderer/extensions/linearMode/LatentPreview.vue'
 import LinearWelcome from '@/renderer/extensions/linearMode/LinearWelcome.vue'
 import LinearArrange from '@/renderer/extensions/linearMode/LinearArrange.vue'
 import LinearFeedback from '@/renderer/extensions/linearMode/LinearFeedback.vue'
+import MediaOutputPreview from '@/renderer/extensions/linearMode/MediaOutputPreview.vue'
 import OutputHistory from '@/renderer/extensions/linearMode/OutputHistory.vue'
 import { useOutputHistory } from '@/renderer/extensions/linearMode/useOutputHistory'
 import type { OutputSelection } from '@/renderer/extensions/linearMode/linearModeTypes'
-import VideoPreview from '@/renderer/extensions/linearMode/VideoPreview.vue'
-import { getMediaType } from '@/renderer/extensions/linearMode/mediaTypes'
 import { app } from '@/scripts/app'
 import { useCommandStore } from '@/stores/commandStore'
 import { useExecutionStore } from '@/stores/executionStore'
 import { useQueueStore } from '@/stores/queueStore'
 import type { ResultItemImpl } from '@/stores/queueStore'
-import { collectAllNodes } from '@/utils/graphTraversalUtil'
-import { executeWidgetsCallback } from '@/utils/litegraphUtil'
-
-// Lazy-loaded to avoid pulling THREE.js into the main bundle
-const Preview3d = defineAsyncComponent(
-  () => import('@/renderer/extensions/linearMode/Preview3d.vue')
-)
 
 const { t } = useI18n()
 const commandStore = useCommandStore()
@@ -73,17 +65,12 @@ async function loadWorkflow(item: AssetItem | undefined) {
   const changeTracker = useWorkflowStore().activeWorkflow?.changeTracker
   if (!changeTracker) return app.loadGraphData(workflow)
   changeTracker.redoQueue = []
-  changeTracker.updateState([workflow], changeTracker.undoQueue)
+  await changeTracker.updateState([workflow], changeTracker.undoQueue)
 }
 
 async function rerun(e: Event) {
   if (!runButtonClick) return
   await loadWorkflow(selectedItem.value)
-  //FIXME don't use timeouts here
-  //Currently seeds fail to properly update even with timeouts?
-  await new Promise((r) => setTimeout(r, 500))
-  executeWidgetsCallback(collectAllNodes(app.rootGraph), 'afterQueued')
-
   runButtonClick(e)
 }
 </script>
@@ -106,6 +93,7 @@ async function rerun(e: Event) {
     </template>
     <Button
       v-if="selectedOutput"
+      v-tooltip.top="t('g.download')"
       size="icon"
       :aria-label="t('g.download')"
       @click="
@@ -119,21 +107,26 @@ async function rerun(e: Event) {
     <Button
       v-if="!executionStore.isIdle && !selectedItem"
       variant="destructive"
-      size="icon"
-      :aria-label="t('menu.interrupt')"
       @click="commandStore.execute('Comfy.Interrupt')"
     >
       <i class="icon-[lucide--x]" />
+      {{ t('linearMode.cancelThisRun') }}
     </Button>
     <Popover
       v-if="selectedItem"
       :entries="[
-        {
-          icon: 'icon-[lucide--download]',
-          label: t('linearMode.downloadAll'),
-          command: () => downloadAsset(selectedItem)
-        },
-        { separator: true },
+        ...(allOutputs(selectedItem).length > 1
+          ? [
+              {
+                icon: 'icon-[lucide--download]',
+                label: t('linearMode.downloadAll', {
+                  count: allOutputs(selectedItem).length
+                }),
+                command: () => downloadAsset(selectedItem)
+              },
+              { separator: true }
+            ]
+          : []),
         {
           icon: 'icon-[lucide--trash-2]',
           label: t('queue.jobMenu.deleteAsset'),
@@ -143,32 +136,14 @@ async function rerun(e: Event) {
     />
   </section>
   <ImagePreview
-    v-if="
-      (canShowPreview && latentPreview) ||
-      getMediaType(selectedOutput) === 'images'
-    "
+    v-if="canShowPreview && latentPreview"
     :mobile
-    :src="(canShowPreview && latentPreview) || selectedOutput!.url"
+    :src="latentPreview"
   />
-  <VideoPreview
-    v-else-if="getMediaType(selectedOutput) === 'video'"
-    :src="selectedOutput!.url"
-    class="flex-1 object-contain md:p-3 md:contain-size"
-  />
-  <audio
-    v-else-if="getMediaType(selectedOutput) === 'audio'"
-    class="m-auto w-full"
-    controls
-    :src="selectedOutput!.url"
-  />
-  <article
-    v-else-if="getMediaType(selectedOutput) === 'text'"
-    class="m-auto my-12 w-full max-w-lg overflow-y-auto"
-    v-text="selectedOutput!.url"
-  />
-  <Preview3d
-    v-else-if="getMediaType(selectedOutput) === '3d'"
-    :model-url="selectedOutput!.url"
+  <MediaOutputPreview
+    v-else-if="selectedOutput"
+    :output="selectedOutput"
+    :mobile
   />
   <LatentPreview v-else-if="queueStore.runningTasks.length > 0" />
   <LinearArrange v-else-if="isArrangeMode" />
diff --git a/src/renderer/extensions/linearMode/MediaOutputPreview.vue b/src/renderer/extensions/linearMode/MediaOutputPreview.vue
new file mode 100644
index 0000000000..b1964224a7
--- /dev/null
+++ b/src/renderer/extensions/linearMode/MediaOutputPreview.vue
@@ -0,0 +1,55 @@
+<script setup lang="ts">
+import { defineAsyncComponent, useAttrs } from 'vue'
+
+import ImagePreview from '@/renderer/extensions/linearMode/ImagePreview.vue'
+import VideoPreview from '@/renderer/extensions/linearMode/VideoPreview.vue'
+import { getMediaType } from '@/renderer/extensions/linearMode/mediaTypes'
+import type { ResultItemImpl } from '@/stores/queueStore'
+import { cn } from '@/utils/tailwindUtil'
+
+const Preview3d = defineAsyncComponent(
+  () => import('@/renderer/extensions/linearMode/Preview3d.vue')
+)
+
+defineOptions({ inheritAttrs: false })
+
+const { output } = defineProps<{
+  output: ResultItemImpl
+  mobile?: boolean
+}>()
+
+const attrs = useAttrs()
+</script>
+<template>
+  <ImagePreview
+    v-if="getMediaType(output) === 'images'"
+    :class="attrs.class as string"
+    :mobile
+    :src="output.url"
+  />
+  <VideoPreview
+    v-else-if="getMediaType(output) === 'video'"
+    :src="output.url"
+    :class="
+      cn('flex-1 object-contain md:p-3 md:contain-size', attrs.class as string)
+    "
+  />
+  <audio
+    v-else-if="getMediaType(output) === 'audio'"
+    :class="cn('m-auto w-full', attrs.class as string)"
+    controls
+    :src="output.url"
+  />
+  <article
+    v-else-if="getMediaType(output) === 'text'"
+    :class="
+      cn('m-auto my-12 w-full max-w-lg overflow-y-auto', attrs.class as string)
+    "
+    v-text="output.url"
+  />
+  <Preview3d
+    v-else-if="getMediaType(output) === '3d'"
+    :class="attrs.class as string"
+    :model-url="output.url"
+  />
+</template>
diff --git a/src/scripts/ui/draggableList.ts b/src/scripts/ui/draggableList.ts
index 0a1fdb5a93..124f5a46a4 100644
--- a/src/scripts/ui/draggableList.ts
+++ b/src/scripts/ui/draggableList.ts
@@ -314,18 +314,22 @@ export class DraggableList extends EventTarget {
   unsetDraggableItem() {
     this.draggableItem.style = null
     this.draggableItem.classList.remove('is-draggable')
-    this.draggableItem.classList.add('is-idle')
     this.draggableItem = null
   }
 
   unsetItemState() {
-    this.getIdleItems().forEach((item) => {
-      // @ts-expect-error fixme ts strict error
+    this.getIdleItems().forEach((item: HTMLElement) => {
       delete item.dataset.isAbove
-      // @ts-expect-error fixme ts strict error
       delete item.dataset.isToggled
-      // @ts-expect-error fixme ts strict error
       item.style.transform = ''
+
+      // Defer re-adding is-idle (which enables CSS transitions) until after
+      // the browser paints items in their final positions. Without this,
+      // the transition animates the stale drag transform.
+      item.classList.remove('is-idle')
+      requestAnimationFrame(() => {
+        item.classList.add('is-idle')
+      })
     })
   }
 
diff --git a/src/views/LinearView.vue b/src/views/LinearView.vue
index 46894ea812..39ca218dc5 100644
--- a/src/views/LinearView.vue
+++ b/src/views/LinearView.vue
@@ -1,5 +1,6 @@
 <script setup lang="ts">
 import { breakpointsTailwind, unrefElement, useBreakpoints } from '@vueuse/core'
+import type { MaybeElement } from '@vueuse/core'
 import Splitter from 'primevue/splitter'
 import SplitterPanel from 'primevue/splitterpanel'
 import { storeToRefs } from 'pinia'
@@ -19,6 +20,7 @@ import LinearProgressBar from '@/renderer/extensions/linearMode/LinearProgressBa
 import MobileDisplay from '@/renderer/extensions/linearMode/MobileDisplay.vue'
 import { useWorkspaceStore } from '@/stores/workspaceStore'
 import { useAppMode } from '@/composables/useAppMode'
+import { useStablePrimeVueSplitterSizer } from '@/composables/useStablePrimeVueSplitterSizer'
 import {
   BUILDER_MIN_SIZE,
   CENTER_PANEL_SIZE,
@@ -39,9 +41,6 @@ const activeTab = computed(() => workspaceStore.sidebarTab.activeSidebarTab)
 const sidebarOnLeft = computed(
   () => settingStore.get('Comfy.Sidebar.Location') === 'left'
 )
-// Builder panel is always on the opposite side of the sidebar.
-// In arrange mode we render 3 panels to match the overlay structure,
-// so the same stateKey percentage maps to the same pixel width.
 const showLeftBuilder = computed(
   () => !sidebarOnLeft.value && isArrangeMode.value
 )
@@ -67,6 +66,25 @@ function sidePanelMinSize(isBuilder: boolean, isHidden: boolean) {
   return SIDEBAR_MIN_SIZE
 }
 
+// Remount splitter when panel structure changes so initializePanels()
+// properly sets flexBasis for the current set of panels.
+const splitterKey = computed(() => {
+  const left = hasLeftPanel.value ? 'L' : ''
+  const right = hasRightPanel.value ? 'R' : ''
+  return isArrangeMode.value ? 'arrange' : `app-${left}${right}`
+})
+
+const leftPanelRef = useTemplateRef<MaybeElement>('leftPanel')
+const rightPanelRef = useTemplateRef<MaybeElement>('rightPanel')
+
+const { onResizeEnd } = useStablePrimeVueSplitterSizer(
+  [
+    { ref: leftPanelRef, storageKey: 'Comfy.LinearView.LeftPanelWidth' },
+    { ref: rightPanelRef, storageKey: 'Comfy.LinearView.RightPanelWidth' }
+  ],
+  [activeTab, splitterKey]
+)
+
 const TYPEFORM_WIDGET_ID = 'gmVqFi8l'
 
 const bottomLeftRef = useTemplateRef('bottomLeftRef')
@@ -86,16 +104,15 @@ const linearWorkflowRef = useTemplateRef('linearWorkflowRef')
       </div>
     </div>
     <Splitter
-      :key="isArrangeMode ? 'arrange' : 'normal'"
+      :key="splitterKey"
       class="bg-comfy-menu-secondary-bg h-[calc(100%-var(--workflow-tabs-height))] w-full border-none"
-      :state-key="isArrangeMode ? 'builder-splitter' : undefined"
-      :state-storage="isArrangeMode ? 'local' : undefined"
-      @resizestart="({ originalEvent }) => originalEvent.preventDefault()"
+      @resizestart="$event.originalEvent.preventDefault()"
+      @resizeend="onResizeEnd"
     >
       <SplitterPanel
         v-if="hasLeftPanel"
-        id="linearLeftPanel"
-        :size="isArrangeMode ? SIDE_PANEL_SIZE : 1"
+        ref="leftPanel"
+        :size="SIDE_PANEL_SIZE"
         :min-size="
           sidePanelMinSize(showLeftBuilder, showRightBuilder && !activeTab)
         "
@@ -104,17 +121,15 @@ const linearWorkflowRef = useTemplateRef('linearWorkflowRef')
         "
         :class="
           cn(
-            'arrange-panel outline-none',
-            showLeftBuilder ? 'min-w-78 bg-comfy-menu-bg' : 'min-w-min'
+            'arrange-panel overflow-hidden outline-none',
+            showLeftBuilder ? 'min-w-78 bg-comfy-menu-bg' : 'min-w-78'
           )
         "
       >
-        <div v-if="showLeftBuilder" class="h-full overflow-y-auto">
-          <AppBuilder />
-        </div>
+        <AppBuilder v-if="showLeftBuilder" />
         <div
           v-else-if="sidebarOnLeft && activeTab"
-          class="flex h-full border-r border-border-subtle"
+          class="size-full overflow-x-hidden border-r border-border-subtle"
         >
           <ExtensionSlot :extension="activeTab" />
         </div>
@@ -126,7 +141,7 @@ const linearWorkflowRef = useTemplateRef('linearWorkflowRef')
       </SplitterPanel>
       <SplitterPanel
         id="linearCenterPanel"
-        :size="isArrangeMode ? CENTER_PANEL_SIZE : 98"
+        :size="CENTER_PANEL_SIZE"
         class="relative flex min-w-0 flex-col gap-4 text-muted-foreground outline-none"
       >
         <LinearProgressBar
@@ -144,22 +159,20 @@ const linearWorkflowRef = useTemplateRef('linearWorkflowRef')
       </SplitterPanel>
       <SplitterPanel
         v-if="hasRightPanel"
-        id="linearRightPanel"
-        :size="isArrangeMode ? SIDE_PANEL_SIZE : 1"
+        ref="rightPanel"
+        :size="SIDE_PANEL_SIZE"
         :min-size="
           sidePanelMinSize(showRightBuilder, showLeftBuilder && !activeTab)
         "
         :style="showLeftBuilder && !activeTab ? { display: 'none' } : undefined"
         :class="
           cn(
-            'arrange-panel outline-none',
-            showRightBuilder ? 'min-w-78 bg-comfy-menu-bg' : 'min-w-min'
+            'arrange-panel overflow-hidden outline-none',
+            showRightBuilder ? 'min-w-78 bg-comfy-menu-bg' : 'min-w-78'
           )
         "
       >
-        <div v-if="showRightBuilder" class="h-full overflow-y-auto">
-          <AppBuilder />
-        </div>
+        <AppBuilder v-if="showRightBuilder" />
         <LinearControls
           v-else-if="sidebarOnLeft && !isArrangeMode"
           ref="linearWorkflowRef"
@@ -167,7 +180,7 @@ const linearWorkflowRef = useTemplateRef('linearWorkflowRef')
         />
         <div
           v-else-if="activeTab"
-          class="flex h-full border-l border-border-subtle"
+          class="h-full overflow-x-hidden border-l border-border-subtle"
         >
           <ExtensionSlot :extension="activeTab" />
         </div>