[don't port to main] fix: Skip cloud auth guard and mock /api/features for Playwright tests

Cloud builds (rh-test) have two initialization blockers for Playwright tests:

1. Firebase auth guard in router waits 16s for auth initialization
   - Tests timeout at 15s, causing all tests to fail
   - Fix: Skip entire auth guard when DISTRIBUTION !== 'cloud'
   - Safe because guard is 100% cloud-specific (Firebase, cloud login, etc.)

2. main.ts calls loadRemoteConfig() which fetches /api/features
   - Only triggered when isCloud=true, but still blocks if endpoint missing
   - Fix: Mock /api/features in ComfyPage setup, try real backend first

Both issues only affect cloud builds. Playwright builds with DISTRIBUTION='localhost'
so these fixes make tests pass while keeping cloud functionality intact.

browser_tests/fixtures/ComfyPage.ts

@@ -285,6 +285,33 @@ export class ComfyPage {
   } = {}) {
     await this.goto()
 
+    // Mock remote config endpoint for cloud builds
+    // Cloud builds (rh-test) call /api/features on startup, which blocks initialization
+    // if the endpoint doesn't exist or times out. Try real backend first, fallback to empty config.
+    await this.page.route('**/api/features', async (route) => {
+      try {
+        // Try to get response from real backend
+        const response = await route.fetch()
+        if (response.ok()) {
+          await route.fulfill({ response })
+        } else {
+          // Backend doesn't have endpoint, return empty config
+          await route.fulfill({
+            status: 200,
+            contentType: 'application/json',
+            body: JSON.stringify({})
+          })
+        }
+      } catch {
+        // Network error, return empty config
+        await route.fulfill({
+          status: 200,
+          contentType: 'application/json',
+          body: JSON.stringify({})
+        })
+      }
+    })
+
     // Mock release endpoint to prevent changelog popups
     if (mockReleases) {
       await this.page.route('**/releases**', async (route) => {

src/router.ts

@@ -5,6 +5,7 @@ import {
 } from 'vue-router'
 import type { RouteLocationNormalized } from 'vue-router'
 
+import { isCloud } from '@/platform/distribution/types'
 import { useDialogService } from '@/services/dialogService'
 import { useFirebaseAuthStore } from '@/stores/firebaseAuthStore'
 import { useUserStore } from '@/stores/userStore'
@@ -104,6 +105,9 @@ const router = createRouter({
 
 // Global authentication guard
 router.beforeEach(async (to, _from, next) => {
+  // Skip cloud-specific auth guard for non-cloud builds (e.g., Playwright tests)
+  if (!isCloud) return next()
+
   const authStore = useFirebaseAuthStore()
 
   // Wait for Firebase auth to initialize with timeout