Floating Menus - UI rework (#5980)

## Summary

Enhancing and further modernizing the UI, giving users more usable area
whilst keeping farmiliar positioning and feel of elements.

## Changes

- **What**: Significant restructure of the UI elements, changing
elements from large blocks to floating elements, updating:
- Side toolbar menu (floating style, supports small/normal mode,
combines to scroll on height overflow)
- Bottom tabs panel (floating style, tabs redesigned)
- Action bar (support for docking/undocking menu)
    - Added login/user menu button to top right
- Restyled breadcrumbs (still collapse when overflows)
- Add litegraph support for fps info position (so it isn't covered by
the sidebar)

- **Breaking**: 
- Removed various elements and added new ones, I have tested custom
sidebars, custom actions, etc but if scripts are inserting elements into
"other" elements they may have been (re)moved.
- Remove support for bottom menu
- Remove support for 2nd-row tabs

## Screenshots 
<img width="1116" height="907" alt="ui"
src="https://github.com/user-attachments/assets/b040a215-67d3-4c88-8c4d-f402a16a34f6"
/>


https://github.com/user-attachments/assets/571dbda5-01ec-47e8-b235-ee1b88c93dd0

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-5980-Floating-Menus-UI-rework-2866d73d3650810aac60cc1afe979b60)
by [Unito](https://www.unito.io)

---------

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

src/components/breadcrumb/SubgraphBreadcrumb.vue

@@ -1,12 +1,13 @@
 <template>
   <div
-    class="subgraph-breadcrumb w-auto"
+    class="subgraph-breadcrumb w-auto drop-shadow-md"
     :class="{
       'subgraph-breadcrumb-collapse': collapseTabs,
       'subgraph-breadcrumb-overflow': overflowingTabs
     }"
     :style="{
-      '--p-breadcrumb-gap': `${ITEM_GAP}px`,
+      '--p-breadcrumb-gap': `0px`,
+      '--p-breadcrumb-item-margin': `${ITEM_GAP / 2}px`,
       '--p-breadcrumb-item-min-width': `${MIN_WIDTH}px`,
       '--p-breadcrumb-item-padding': `${ITEM_PADDING}px`,
       '--p-breadcrumb-icon-width': `${ICON_WIDTH}px`
@@ -14,7 +15,7 @@
   >
     <Breadcrumb
       ref="breadcrumbRef"
-      class="bg-transparent p-0"
+      class="w-fit rounded-lg p-0"
       :model="items"
       aria-label="Graph navigation"
     >
@@ -174,30 +175,65 @@ onUpdated(() => {
   @apply overflow-hidden;
 }
 
+:deep(.p-breadcrumb) {
+  width: 100%;
+  background-color: transparent;
+}
+
 :deep(.p-breadcrumb-item) {
-  @apply flex items-center rounded-lg overflow-hidden;
+  @apply flex items-center overflow-hidden;
   min-width: calc(var(--p-breadcrumb-item-min-width) + 1rem);
   /* Collapse middle items first */
   flex-shrink: 10000;
 }
 
+:deep(.p-breadcrumb-separator) {
+  display: flex;
+  padding: 0 var(--p-breadcrumb-item-margin);
+}
+
+:deep(.p-breadcrumb-item-link) {
+  padding: 0
+    calc(var(--p-breadcrumb-item-margin) + var(--p-breadcrumb-item-padding));
+}
+
+:deep(.p-breadcrumb-separator),
+:deep(.p-breadcrumb-item) {
+  @apply h-12;
+  border-top: 1px solid var(--p-panel-border-color);
+  border-bottom: 1px solid var(--p-panel-border-color);
+  background-color: var(--comfy-menu-bg);
+}
+
 :deep(.p-breadcrumb-item:has(.p-breadcrumb-item-link-icon-visible)) {
   min-width: calc(var(--p-breadcrumb-item-min-width) + 1rem + 20px);
 }
 
 :deep(.p-breadcrumb-item:first-child) {
+  @apply rounded-l-lg;
   /* Then collapse the root workflow */
   flex-shrink: 5000;
+  border-left: 1px solid var(--p-panel-border-color);
+
+  .p-breadcrumb-item-link {
+    padding-left: var(--p-breadcrumb-item-padding);
+  }
 }
 
 :deep(.p-breadcrumb-item:last-child) {
+  @apply rounded-r-lg;
   /* Then collapse the active item */
   flex-shrink: 1;
+  border-right: 1px solid var(--p-panel-border-color);
 }
 
-:deep(.p-breadcrumb-item:hover),
-:deep(.p-breadcrumb-item:has(.p-breadcrumb-item-link-menu-visible)) {
-  background-color: color-mix(in srgb, var(--fg-color) 10%, transparent);
+:deep(.p-breadcrumb-item-link:hover),
+:deep(.p-breadcrumb-item-link-menu-visible) {
+  background-color: color-mix(
+    in srgb,
+    var(--fg-color) 10%,
+    var(--comfy-menu-bg)
+  ) !important;
   color: var(--fg-color);
 }
 </style>
@@ -214,7 +250,7 @@ onUpdated(() => {
   .p-breadcrumb-item:nth-last-child(3),
   .p-breadcrumb-separator:nth-last-child(2),
   .p-breadcrumb-item:nth-last-child(1) {
-    @apply block;
+    @apply flex;
   }
 }
 </style>