App mode - more updates & fixes (#9137)

## Summary

- fix sizing of sidebars in app mode
- update feedback button to match design
- update job queue notification
- clickable queue spinner item to allow clear queue
- refactor mode out of store to specific workflow instance
- support different saved vs active mode
- other styling/layout tweaks

## Changes

- **What**: Changes the store to a composable and moves the mode state
to the workflow.
- This enables switching between tabs and maintaining the mode they were
in

## Screenshots (if applicable)
<img width="1866" height="1455" alt="image"
src="https://github.com/user-attachments/assets/f9a8cd36-181f-4948-b48c-dd27bd9127cf"
/>

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-9137-App-mode-more-updates-fixes-3106d73d365081a18ccff6ffe24fdec7)
by [Unito](https://www.unito.io)

---------

Co-authored-by: github-actions <github-actions@github.com>

src/components/appMode/AppModeToolbar.vue

@@ -8,12 +8,12 @@ import { useWorkflowTemplateSelectorDialog } from '@/composables/useWorkflowTemp
 import { useCommandStore } from '@/stores/commandStore'
 import { useWorkspaceStore } from '@/stores/workspaceStore'
 import { cn } from '@/utils/tailwindUtil'
-import { useAppModeStore } from '@/stores/appModeStore'
+import { useAppMode } from '@/composables/useAppMode'
 
 const { t } = useI18n()
 const commandStore = useCommandStore()
 const workspaceStore = useWorkspaceStore()
-const appModeStore = useAppModeStore()
+const { enableAppBuilder, setMode } = useAppMode()
 const tooltipOptions = { showDelay: 300, hideDelay: 300 }
 
 const isAssetsActive = computed(
@@ -24,7 +24,7 @@ const isWorkflowsActive = computed(
 )
 
 function enterBuilderMode() {
-  appModeStore.setMode('builder:select')
+  setMode('builder:select')
 }
 
 function openAssets() {
@@ -61,7 +61,7 @@ function openTemplates() {
     </WorkflowActionsDropdown>
 
     <Button
-      v-if="appModeStore.enableAppBuilder"
+      v-if="enableAppBuilder"
       v-tooltip.right="{
         value: t('linearMode.appModeToolbar.appBuilder'),
         ...tooltipOptions