rework minimap, toolbox, and menu designs with unified theming (#6038)

## Summary

This PR redesigns the graph canvas interface components including
minimap, toolbox, and menu systems with updated spacing, colors, and
interaction patterns - using the design tokens directly from Figma,
which can be used elsewhere going forward.

There are some other changes to the designs, outlined
[here](https://www.notion.so/comfy-org/Update-Minimap-Menu-v2-2886d73d365080e88e12f8df027019c0):

- [x]  Update/standardize the padding between viewport and toolbox
- [x] Update toolbox component’s style to match the other floating menus
style (border radius, height, padding and follow theme colors)
- [x]  Expose the minimap button
- [x]  Remove the focus button and delete it’s keybinding
- [x]  Group the hand and the default cursor buttons


https://github.com/user-attachments/assets/92542e60-c32d-4a21-a6f6-e72837a70b17

## Review Focus

New CSS variables for cross-component theming consistency and
CanvasModeSelector component extraction for improved code organization.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6038-rework-minimap-toolbox-and-menu-designs-with-unified-theming-28b6d73d36508191a0c6cf8036d965c4)
by [Unito](https://www.unito.io)

---------

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

browser_tests/tests/interaction.spec.ts

@@ -3,10 +3,10 @@ import { expect } from '@playwright/test'
 import type { Position } from '@vueuse/core'
 
 import {
-  type ComfyPage,
   comfyPageFixture as test,
   testComfySnapToGridGridSize
 } from '../fixtures/ComfyPage'
+import type { ComfyPage } from '../fixtures/ComfyPage'
 import type { NodeReference } from '../fixtures/utils/litegraphUtils'
 
 test.beforeEach(async ({ comfyPage }) => {
@@ -786,16 +786,8 @@ test.describe('Viewport settings', () => {
     // Screenshot the canvas element
     await comfyPage.setSetting('Comfy.Graph.CanvasMenu', true)
 
-    // Open zoom controls dropdown first
-    const zoomControlsButton = comfyPage.page.getByTestId(
-      'zoom-controls-button'
-    )
-    await zoomControlsButton.click()
-
     const toggleButton = comfyPage.page.getByTestId('toggle-minimap-button')
     await toggleButton.click()
-    // close zoom menu
-    await zoomControlsButton.click()
     await comfyPage.setSetting('Comfy.Graph.CanvasMenu', false)
 
     await comfyPage.menu.topbar.saveWorkflow('Workflow A')