Enhanced custom icon support with tailwind (#5159)

* Add support for custom iconify using tailwind plugin
- Register svgs from custom icons folder
- Update existing custom icons to remove padding
- Swap component icons for classes in sidebar tabs
- Update browse templates in menu to use custom icon

* Add basic check for custom SVG icons

* Remove unused iconify packages

browser_tests/tests/customIcons.spec.ts

@@ -0,0 +1,57 @@
+import { expect } from '@playwright/test'
+import type { Locator } from '@playwright/test'
+
+import { comfyPageFixture as test } from '../fixtures/ComfyPage'
+
+async function verifyCustomIconSvg(iconElement: Locator) {
+  const svgVariable = await iconElement.evaluate((element) => {
+    const styles = getComputedStyle(element)
+    return styles.getPropertyValue('--svg')
+  })
+
+  expect(svgVariable).toBeTruthy()
+  const dataUrlMatch = svgVariable.match(
+    /url\("data:image\/svg\+xml,([^"]+)"\)/
+  )
+  expect(dataUrlMatch).toBeTruthy()
+
+  const encodedSvg = dataUrlMatch![1]
+  const decodedSvg = decodeURIComponent(encodedSvg)
+
+  // Check for SVG header to confirm it's a valid SVG
+  expect(decodedSvg).toContain("<svg xmlns='http://www.w3.org/2000/svg'")
+}
+
+test.describe('Custom Icons', () => {
+  test.beforeEach(async ({ comfyPage }) => {
+    await comfyPage.setSetting('Comfy.UseNewMenu', 'Top')
+  })
+
+  test('sidebar tab icons use custom SVGs', async ({ comfyPage }) => {
+    // Find the icon in the sidebar
+    const icon = comfyPage.page.locator(
+      '.icon-\\[comfy--ai-model\\].side-bar-button-icon'
+    )
+    await expect(icon).toBeVisible()
+
+    // Verify the custom SVG content
+    await verifyCustomIconSvg(icon)
+  })
+
+  test('Browse Templates menu item uses custom template icon', async ({
+    comfyPage
+  }) => {
+    // Open the topbar menu
+    await comfyPage.menu.topbar.openTopbarMenu()
+    const menuItem = comfyPage.menu.topbar.getMenuItem('Browse Templates')
+
+    // Find the icon as a previous sibling of the menu item label
+    const templateIcon = menuItem
+      .locator('..')
+      .locator('.icon-\\[comfy--template\\]')
+    await expect(templateIcon).toBeVisible()
+
+    // Verify the custom SVG content
+    await verifyCustomIconSvg(templateIcon)
+  })
+})