refactor: parallelize bootstrap and simplify lifecycle with VueUse (#8307)

## Summary

Refactors bootstrap and lifecycle management to parallelize
initialization, use Vue best practices, and fix a logout state bug.

## Changes

### Bootstrap Store (`bootstrapStore.ts`)
- Extract early bootstrap logic into a dedicated store using
`useAsyncState`
- Parallelize settings, i18n, and workflow sync loading (previously
sequential)
- Handle multi-user login scenarios by deferring settings/workflows
until authenticated

### GraphCanvas Refactoring
- Move non-DOM composables (`useGlobalLitegraph`, `useCopy`, `usePaste`,
etc.) to script setup level for earlier initialization
- Move `watch` and `whenever` declarations outside `onMounted` (Vue best
practice)
- Use `until()` from VueUse to await bootstrap store readiness instead
of direct async calls

### GraphView Simplification
- Replace manual `addEventListener`/`removeEventListener` with
`useEventListener`
- Replace `setInterval` with `useIntervalFn` for automatic cleanup
- Move core command registration to script setup level

### Bug Fix
Using `router.push()` for logout caused `isSettingsReady` to persist as
`true`, making new users inherit the previous user's cached settings.
Reverted to `window.location.reload()` with TODOs for future store reset
implementation.

## Testing

- Verified login/logout cycle clears settings correctly
- Verified bootstrap sequence completes without errors

---------

Co-authored-by: Amp <amp@ampcode.com>

src/stores/bootstrapStore.test.ts

@@ -0,0 +1,115 @@
+import { createTestingPinia } from '@pinia/testing'
+import { setActivePinia } from 'pinia'
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+import { ref } from 'vue'
+
+import { useSettingStore } from '@/platform/settings/settingStore'
+
+import { useBootstrapStore } from './bootstrapStore'
+
+vi.mock('@/scripts/api', () => ({
+  api: {
+    init: vi.fn().mockResolvedValue(undefined),
+    getNodeDefs: vi.fn().mockResolvedValue({ TestNode: { name: 'TestNode' } }),
+    getCustomNodesI18n: vi.fn().mockResolvedValue({}),
+    getUserConfig: vi.fn().mockResolvedValue({})
+  }
+}))
+
+vi.mock('@/i18n', () => ({
+  mergeCustomNodesI18n: vi.fn()
+}))
+
+const mockIsSettingsReady = ref(false)
+
+vi.mock('@/platform/settings/settingStore', () => ({
+  useSettingStore: vi.fn(() => ({
+    load: vi.fn(() => {
+      mockIsSettingsReady.value = true
+    }),
+    get isReady() {
+      return mockIsSettingsReady.value
+    },
+    isLoading: ref(false),
+    error: ref(undefined)
+  }))
+}))
+
+vi.mock('@/platform/workflow/management/stores/workflowStore', () => ({
+  useWorkflowStore: vi.fn(() => ({
+    loadWorkflows: vi.fn(),
+    syncWorkflows: vi.fn().mockResolvedValue(undefined)
+  }))
+}))
+
+vi.mock('@/stores/userStore', () => ({
+  useUserStore: vi.fn(() => ({
+    initialize: vi.fn().mockResolvedValue(undefined),
+    needsLogin: false
+  }))
+}))
+
+const mockIsFirebaseInitialized = ref(false)
+vi.mock('@/stores/firebaseAuthStore', () => ({
+  useFirebaseAuthStore: vi.fn(() => ({
+    isInitialized: mockIsFirebaseInitialized
+  }))
+}))
+
+const mockDistributionTypes = vi.hoisted(() => ({
+  isCloud: false
+}))
+vi.mock('@/platform/distribution/types', () => mockDistributionTypes)
+
+describe('bootstrapStore', () => {
+  beforeEach(() => {
+    mockIsSettingsReady.value = false
+    mockIsFirebaseInitialized.value = false
+    mockDistributionTypes.isCloud = false
+    setActivePinia(createTestingPinia({ stubActions: false }))
+    vi.clearAllMocks()
+  })
+
+  it('initializes with all flags false', () => {
+    const store = useBootstrapStore()
+    const settingStore = useSettingStore()
+    expect(settingStore.isReady).toBe(false)
+    expect(store.isI18nReady).toBe(false)
+  })
+
+  it('starts store bootstrap (settings, i18n)', async () => {
+    const store = useBootstrapStore()
+    const settingStore = useSettingStore()
+    void store.startStoreBootstrap()
+
+    await vi.waitFor(() => {
+      expect(settingStore.isReady).toBe(true)
+      expect(store.isI18nReady).toBe(true)
+    })
+  })
+
+  describe('cloud mode', () => {
+    beforeEach(() => {
+      mockDistributionTypes.isCloud = true
+    })
+
+    it('waits for Firebase auth before loading i18n and settings', async () => {
+      const store = useBootstrapStore()
+      const settingStore = useSettingStore()
+      const bootstrapPromise = store.startStoreBootstrap()
+
+      // Bootstrap is blocked waiting for firebase
+      expect(store.isI18nReady).toBe(false)
+      expect(settingStore.isReady).toBe(false)
+
+      // Unblock by initializing firebase
+      mockIsFirebaseInitialized.value = true
+      await bootstrapPromise
+
+      await vi.waitFor(() => {
+        expect(store.isI18nReady).toBe(true)
+        expect(settingStore.isReady).toBe(true)
+      })
+    })
+  })
+})