feat: Integrated tab UI updates (#8516)

## Summary
Next iteration of the integrated tab/top menu

## Changes
- **What**:  
- make integrated default, rename old to legacy
- move feedback to integrated
- fix user icon shapes
- remove comfy cloud text in top bar, move to canvas stats
- add chevron to C logo menu
- move help back to sidebar
   - remove now unused help top positioning code

## Screenshots (if applicable)
<img width="428" height="148" alt="image"
src="https://github.com/user-attachments/assets/725025b7-4982-4f61-be11-8aabb0a1faff"
/>
<img width="264" height="187" alt="image"
src="https://github.com/user-attachments/assets/91fa5e92-df08-4467-9bc5-50a614d9b8aa"
/>
<img width="1169" height="220" alt="image"
src="https://github.com/user-attachments/assets/68c81bea-0cff-48df-8303-a6231a1d2fc4"
/>
<img width="242" height="207" alt="image"
src="https://github.com/user-attachments/assets/5a10f40e-83ae-44c3-9434-3dbe87ba30e2"
/>
<img width="302" height="222" alt="image"
src="https://github.com/user-attachments/assets/27fcc638-5fff-4302-9a1f-066227aafd86"
/>

---------

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

src/components/sidebar/ComfyMenuButton.vue

@@ -11,12 +11,13 @@
     }"
     @click="onLogoMenuClick($event)"
   >
-    <div class="flex size-8 items-center justify-center rounded-lg bg-black">
+    <div class="flex items-center gap-0.5">
       <ComfyLogo
         alt="ComfyUI Logo"
-        class="comfyui-logo h-[18px] w-[18px] text-white"
+        class="comfyui-logo h-[18px] w-[18px]"
         mode="fill"
       />
+      <i class="icon-[lucide--chevron-down] size-3 text-muted-foreground" />
     </div>
   </div>