[refactor] reorganize Vue node browser tests into subfolders based on behaviors and states (#5823)

## Summary

Refactored Vue node browser tests by organizing them into behavioral
categories, better reflecting the nature of browser tests as behind
user-action/behavior specifications.

- **What**: Reorganized Playwright browser tests into logical behavioral
folders (`interactions/`, `nodeStates/`)
- **Structure**: Created subdirectories for canvas interactions, link
interactions, node interactions, and node states

## Review Focus

Test file path changes and associated snapshot relocations ensure all
browser tests continue to run correctly in the new structure.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-5823-refactor-reorganize-Vue-node-browser-tests-into-subfolder-based-on-behaviors-and-states-27b6d73d365081aaa6f9e3a388165258)
by [Unito](https://www.unito.io)

browser_tests/tests/vueNodes/interactions/node/select.spec.ts

@@ -0,0 +1,51 @@
+import {
+  comfyExpect as expect,
+  comfyPageFixture as test
+} from '../../../../fixtures/ComfyPage'
+
+test.beforeEach(async ({ comfyPage }) => {
+  await comfyPage.setSetting('Comfy.UseNewMenu', 'Disabled')
+})
+
+test.describe('Vue Node Selection', () => {
+  test.beforeEach(async ({ comfyPage }) => {
+    await comfyPage.setSetting('Comfy.VueNodes.Enabled', true)
+    await comfyPage.vueNodes.waitForNodes()
+  })
+
+  const modifiers = [
+    { key: 'Control', name: 'ctrl' },
+    { key: 'Shift', name: 'shift' }
+  ] as const
+
+  for (const { key: modifier, name } of modifiers) {
+    test(`should allow selecting multiple nodes with ${name}+click`, async ({
+      comfyPage
+    }) => {
+      await comfyPage.page.getByText('Load Checkpoint').click()
+      expect(await comfyPage.vueNodes.getSelectedNodeCount()).toBe(1)
+
+      await comfyPage.page.getByText('Empty Latent Image').click({
+        modifiers: [modifier]
+      })
+      expect(await comfyPage.vueNodes.getSelectedNodeCount()).toBe(2)
+
+      await comfyPage.page.getByText('KSampler').click({
+        modifiers: [modifier]
+      })
+      expect(await comfyPage.vueNodes.getSelectedNodeCount()).toBe(3)
+    })
+
+    test(`should allow de-selecting nodes with ${name}+click`, async ({
+      comfyPage
+    }) => {
+      await comfyPage.page.getByText('Load Checkpoint').click()
+      expect(await comfyPage.vueNodes.getSelectedNodeCount()).toBe(1)
+
+      await comfyPage.page.getByText('Load Checkpoint').click({
+        modifiers: [modifier]
+      })
+      expect(await comfyPage.vueNodes.getSelectedNodeCount()).toBe(0)
+    })
+  }
+})