style: move border and shadow style to outer container to fix topbar badges shadow/border (#7044)

## Summary

Moves the shadow and border from workflow tabs to outer container so
that there is no longer an inconsistency with the badges and topbar
bottom border and shadows.

## Changes

| Before | After |
|
---------------------------------------------------------------------------------------------------------------------------------------------
|
---------------------------------------------------------------------------------------------------------------------------------------------
|
| <img width="1522" height="598" alt="Selection_2473"
src="https://github.com/user-attachments/assets/92aa602c-a018-4b3d-8606-9c00552ffc20"
/> | <img width="1522" height="598" alt="Selection_2472"
src="https://github.com/user-attachments/assets/13c75da3-a938-442a-9bf6-9c30d822a610"
/> |
| <img width="1522" height="598" alt="Selection_2474"
src="https://github.com/user-attachments/assets/e84efd2a-6ae1-44a6-9901-0f902e942b64"
/> | <img width="1522" height="598" alt="Selection_2475"
src="https://github.com/user-attachments/assets/66d4852e-eed7-49f9-8f0f-9e8bbcdcb0b8"
/> |

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-7044-style-move-border-and-shadow-style-to-outer-container-to-fix-topbar-badges-shadow-border-2ba6d73d365081b991a3f981db87f434)
by [Unito](https://www.unito.io)

---------

Co-authored-by: github-actions <[email protected]>

Author: christian-byrne

browser_tests/tests/vueNodes/interactions/node/move.spec.ts-snapshots/vue-node-moved-node-chromium-linux.png

@@ -14,7 +14,9 @@
           v-if="isNativeWindow() && workflowTabsPosition !== 'Topbar'"
           class="app-drag fixed top-0 left-0 z-10 h-[var(--comfy-topbar-height)] w-full"
         />
-        <div class="flex h-full items-center">
+        <div
+          class="flex h-full items-center border-b border-interface-stroke bg-comfy-menu-bg shadow-interface"
+        >
           <WorkflowTabs />
           <TopbarBadges />
         </div>

browser_tests/tests/vueNodes/nodeStates/colors.spec.ts-snapshots/vue-node-custom-color-blue-chromium-linux.png

@@ -1,7 +1,7 @@
 <template>
   <div
     ref="containerRef"
-    class="workflow-tabs-container flex h-full max-w-full flex-auto flex-row overflow-hidden border-b border-[var(--interface-stroke)] shadow-interface"
+    class="workflow-tabs-container flex h-full max-w-full flex-auto flex-row overflow-hidden"
     :class="{ 'workflow-tabs-container-desktop': isDesktop }"
   >
     <Button