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/sidebar/tabs/SidebarTabTemplate.vue

@@ -3,7 +3,7 @@
     ref="containerRef"
     :class="
       cn(
-        'comfy-vue-side-bar-container group/sidebar-tab flex h-full flex-col',
+        'comfy-vue-side-bar-container group/sidebar-tab flex h-full flex-col w-full',
         props.class
       )
     "