feat/fix: App mode QA updates (#9439)

## Summary

Various fixes from app mode QA

## Changes

- **What**: 
- fix: prevent inserting nodes from workflow/apps sidebar tabs
- fix: hide json extension in workflow tab
- fix: hide apps nav button in apps tab when already in apps mode
- fix: center text on arrange page
- fix: prevent IoItems from "jumping" due to stale transform after drag
and drop op
- fix: refactor side panels and add custom stable pixel based sizing
- fix: make outputs/inputs lists in app builder scrollable
- fix: fix rerun not working correctly

- feat: add text to interrupt button
- feat: add enter app mode button to builder toolbar
- feat: add tooltip to download button on linear view
- feat: show last output of workflow in arrange tab if available
- feat: show download count in download all button, hide if only 1 asset
to download

## Review Focus

- Rerun - I am not sure why it was triggering widget actions, removing
it seemed like the correct fix
- useStablePrimeVueSplitter - this is a workaround for the fact it uses
percent sizing, I also tried switching to reka-ui splitters, but they
also only support % sizing in our version [pixel based looks to have
been added in a newer version, will log an issue to upgrade & replace
splitters with this]


## Screenshots (if applicable)

<img width="1314" height="1129" alt="image"
src="https://github.com/user-attachments/assets/c430f9d6-7c29-4853-803e-5b6fe7086fca"
/>
<img width="511" height="283" alt="image"
src="https://github.com/user-attachments/assets/b7e594d4-70a1-41e3-8ba1-78512f2a5c8b"
/>
<img width="254" height="232" alt="image"
src="https://github.com/user-attachments/assets/1d146399-39ea-4b0e-928c-340b74957535"
/>
<img width="487" height="198" alt="image"
src="https://github.com/user-attachments/assets/e2ba7f5d-8ff5-47f4-9526-61ebb99514b8"
/>
<img width="378" height="647" alt="image"
src="https://github.com/user-attachments/assets/a47a3054-9320-4327-bdc0-b0a16e19f83d"
/>
<img width="1016" height="476" alt="image"
src="https://github.com/user-attachments/assets/479ae50e-d380-4d56-a5c9-5df142b14ed0"
/>


┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-9439-feat-fix-App-mode-QA-updates-31a6d73d365081b38337d63207b88817)
by [Unito](https://www.unito.io)

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,