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/SideToolbar.vue

@@ -41,7 +41,7 @@
           v-if="userStore.isMultiUserServer"
           :is-small="isSmall"
         />
-        <SidebarHelpCenterIcon v-if="!isIntegratedTabBar" :is-small="isSmall" />
+        <SidebarHelpCenterIcon :is-small="isSmall" />
         <SidebarBottomPanelToggleButton v-if="!isCloud" :is-small="isSmall" />
         <SidebarShortcutsToggleButton :is-small="isSmall" />
         <SidebarSettingsButton :is-small="isSmall" />
@@ -95,9 +95,6 @@ const sidebarLocation = computed<'left' | 'right'>(() =>
   settingStore.get('Comfy.Sidebar.Location')
 )
 const sidebarStyle = computed(() => settingStore.get('Comfy.Sidebar.Style'))
-const isIntegratedTabBar = computed(
-  () => settingStore.get('Comfy.UI.TabBarLayout') === 'Integrated'
-)
 const isConnected = computed(
   () =>
     selectedTab.value ||