feat: Passing --browser flag alone will launch after test selection

cli/CHANGELOG.md

@@ -3,6 +3,13 @@
 
 _Released 12/19/2023 (PENDING)_
 
+**Features:**
+
+- Running the command `cypress open --browser <browser-name>`will
+launch the browser after testing type selection in the GUI. Addresses 
+[#22003](https://github.com/cypress-io/cypress/issues/22003).
+Addressed in [#28538](https://github.com/cypress-io/cypress/pull/28538).
+
 **Bugfixes:**
 
 - Cypress no longer errors during `cypress run` or `cypress open` when using Typescript 5.3.2+ with `extends` in `tsconfig.json`. Fixes [#28385](https://github.com/cypress-io/cypress/issues/28385).

packages/launchpad/src/setup/OpenBrowser.vue

@@ -9,6 +9,7 @@
     />
     <OpenBrowserList
       variant=""
+      :wasBrowserSetInCLI="query.data.value.localSettings.preferences.wasBrowserSetInCLI"
       :gql="query.data.value.currentProject"
       @navigated-back="backFn"
       @launch="launch"
@@ -31,6 +32,11 @@ const { t } = useI18n()
 
 gql`
 query OpenBrowser {
+  localSettings {
+    preferences {
+      wasBrowserSetInCLI
+    }
+  }
   currentProject {
     id
     currentTestingType

packages/launchpad/src/setup/OpenBrowserList.vue

@@ -155,7 +155,7 @@
 <script lang="ts" setup>
 import { useI18n } from '@cy/i18n'
 import Button from '@packages/frontend-shared/src/components/Button.vue'
-import { computed } from 'vue'
+import { computed, onMounted } from 'vue'
 import { useMutation, gql, useSubscription } from '@urql/vue'
 import { allBrowsersIcons } from '@packages/frontend-shared/src/assets/browserLogos'
 import TestingTypeComponentIcon from '~icons/cy/testing-type-component_x16'
@@ -215,6 +215,7 @@ useSubscription({ query: OpenBrowserList_BrowserStatusChangeDocument })
 
 const props = defineProps<{
   gql: OpenBrowserListFragment
+  wasBrowserSetInCLI: boolean | null
 }>()
 
 const emit = defineEmits<{
@@ -285,4 +286,10 @@ const browserStatus = computed(() => {
 
 const testingTypeIcon = computed(() => props.gql.currentTestingType === 'component' ? TestingTypeComponentIcon : TestingTypeE2EIcon)
 
+onMounted(() => {
+  if (props.wasBrowserSetInCLI && !browserStatus.value.open) {
+    emit('launch')
+  }
+})
+
 </script>