Style: Standardize icon use Part 1 (#5947)

## Summary

Remove the mix of class based and component style icons in favor of just
[classes](https://iconify.design/docs/usage/css/tailwind/tailwind4/#basic-usage).

## Changes

- **What**: Migrate existing lucide icons

## Review Focus

What differs between the icons before and now?

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-5947-Style-Standardize-icon-use-Part-1-2846d73d365081bfa66ceb6bdaa9ff02)
by [Unito](https://www.unito.io)

---------

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

src/components/graph/GraphCanvasMenu.vue

@@ -25,7 +25,7 @@
         @click="() => commandStore.execute('Comfy.Canvas.Unlock')"
       >
         <template #icon>
-          <i-lucide:mouse-pointer-2 />
+          <i class="icon-[lucide--mouse-pointer-2]" />
         </template>
       </Button>
 
@@ -39,7 +39,7 @@
         @click="() => commandStore.execute('Comfy.Canvas.Lock')"
       >
         <template #icon>
-          <i-lucide:hand />
+          <i class="icon-[lucide--hand]" />
         </template>
       </Button>
 
@@ -56,7 +56,7 @@
         @click="() => commandStore.execute('Comfy.Canvas.FitView')"
       >
         <template #icon>
-          <i-lucide:focus />
+          <i class="icon-[lucide--focus]" />
         </template>
       </Button>
 
@@ -73,7 +73,7 @@
       >
         <span class="inline-flex text-xs">
           <span>{{ canvasStore.appScalePercentage }}%</span>
-          <i-lucide:chevron-down />
+          <i class="icon-[lucide--chevron-down]" />
         </span>
       </Button>
 
@@ -90,7 +90,7 @@
         @click="() => commandStore.execute('Workspace.ToggleFocusMode')"
       >
         <template #icon>
-          <i-lucide:lightbulb />
+          <i class="icon-[lucide--lightbulb]" />
         </template>
       </Button>
 
@@ -111,7 +111,7 @@
         @click="() => commandStore.execute('Comfy.Canvas.ToggleLinkVisibility')"
       >
         <template #icon>
-          <i-lucide:route-off />
+          <i class="icon-[lucide--route-off]" />
         </template>
       </Button>
     </ButtonGroup>