App mode - builder toolbar - 6 (#9029)

## Summary

A toolbar for builder mode, hides various UI elements when in builder
mode

## Screenshots (if applicable)

Toolbar
<img width="706" height="166" alt="image"
src="https://github.com/user-attachments/assets/1f0b08b5-1661-4ed5-96bb-feecc73ca701"
/>

With disabled save and output required popover
<img width="711" height="299" alt="image"
src="https://github.com/user-attachments/assets/4a93aaf8-d850-4afe-ab9f-4abd44a25420"
/>

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-9029-App-mode-builder-toolbar-6-30d6d73d365081e3aef5c90033ba347d)
by [Unito](https://www.unito.io)

src/components/builder/BuilderToolbar.vue

@@ -0,0 +1,105 @@
+<template>
+  <nav
+    class="fixed top-[calc(var(--workflow-tabs-height)+var(--spacing)*1.5)] left-1/2 z-[1000] -translate-x-1/2"
+    :aria-label="t('builderToolbar.label')"
+  >
+    <div
+      class="inline-flex items-center gap-1 rounded-2xl border border-border-default bg-base-background p-2 shadow-interface"
+    >
+      <template
+        v-for="(step, index) in [selectStep, arrangeStep]"
+        :key="step.id"
+      >
+        <button
+          :class="
+            cn(
+              stepClasses,
+              activeStep === step.id && 'bg-interface-builder-mode-background',
+              activeStep !== step.id &&
+                'hover:bg-secondary-background bg-transparent'
+            )
+          "
+          :aria-current="activeStep === step.id ? 'step' : undefined"
+          @click="appModeStore.setMode(step.id)"
+        >
+          <StepBadge :step :index :model-value="activeStep" />
+          <StepLabel :step />
+        </button>
+
+        <div class="mx-1 h-px w-4 bg-border-default" role="separator" />
+      </template>
+
+      <!-- Save -->
+      <ConnectOutputPopover
+        v-if="!appModeStore.hasOutputs"
+        :is-select-active="activeStep === 'builder:select'"
+        @switch="appModeStore.setMode('builder:select')"
+      >
+        <button :class="cn(stepClasses, 'opacity-30 bg-transparent')">
+          <StepBadge :step="saveStep" :index="2" :model-value="activeStep" />
+          <StepLabel :step="saveStep" />
+        </button>
+      </ConnectOutputPopover>
+      <button
+        v-else
+        :class="
+          cn(
+            stepClasses,
+            activeStep === 'save'
+              ? 'bg-interface-builder-mode-background'
+              : 'hover:bg-secondary-background bg-transparent'
+          )
+        "
+        @click="appModeStore.setBuilderSaving(true)"
+      >
+        <StepBadge :step="saveStep" :index="2" :model-value="activeStep" />
+        <StepLabel :step="saveStep" />
+      </button>
+    </div>
+  </nav>
+</template>
+
+<script setup lang="ts">
+import { computed } from 'vue'
+import { useI18n } from 'vue-i18n'
+
+import { useAppModeStore } from '@/stores/appModeStore'
+import type { AppMode } from '@/stores/appModeStore'
+import { cn } from '@/utils/tailwindUtil'
+
+import ConnectOutputPopover from './ConnectOutputPopover.vue'
+import StepBadge from './StepBadge.vue'
+import StepLabel from './StepLabel.vue'
+import type { BuilderToolbarStep } from './types'
+
+const { t } = useI18n()
+const appModeStore = useAppModeStore()
+
+const activeStep = computed(() =>
+  appModeStore.isBuilderSaving ? 'save' : appModeStore.mode
+)
+
+const stepClasses =
+  'inline-flex h-14 min-h-8 cursor-pointer items-center gap-3 rounded-lg py-2 pr-4 pl-2 transition-colors border-none'
+
+const selectStep: BuilderToolbarStep<AppMode> = {
+  id: 'builder:select',
+  title: t('builderToolbar.select'),
+  subtitle: t('builderToolbar.selectDescription'),
+  icon: 'icon-[lucide--mouse-pointer-click]'
+}
+
+const arrangeStep: BuilderToolbarStep<AppMode> = {
+  id: 'builder:arrange',
+  title: t('builderToolbar.arrange'),
+  subtitle: t('builderToolbar.arrangeDescription'),
+  icon: 'icon-[lucide--layout-panel-left]'
+}
+
+const saveStep: BuilderToolbarStep<'save'> = {
+  id: 'save',
+  title: t('builderToolbar.save'),
+  subtitle: t('builderToolbar.saveDescription'),
+  icon: 'icon-[lucide--cloud-upload]'
+}
+</script>

src/components/builder/ConnectOutputPopover.vue

@@ -0,0 +1,78 @@
+<template>
+  <PopoverRoot>
+    <PopoverTrigger as-child>
+      <slot />
+    </PopoverTrigger>
+    <PopoverContent
+      side="bottom"
+      :side-offset="8"
+      :collision-padding="10"
+      class="z-[1001] w-80 rounded-xl border border-border-default bg-base-background shadow-interface will-change-[transform,opacity] data-[state=open]:data-[side=bottom]:animate-slideUpAndFade"
+    >
+      <div class="flex h-12 items-center justify-between px-4">
+        <h3 class="text-sm font-medium text-base-foreground">
+          {{ t('builderToolbar.connectOutput') }}
+        </h3>
+        <PopoverClose
+          :aria-label="t('g.close')"
+          class="flex cursor-pointer appearance-none items-center justify-center border-none bg-transparent p-0 text-muted-foreground hover:text-base-foreground"
+        >
+          <i class="icon-[lucide--x] size-4" />
+        </PopoverClose>
+      </div>
+      <div class="border-t border-border-default" />
+      <p class="mt-3 px-4 text-xs text-muted-foreground leading-relaxed">
+        {{ t('builderToolbar.connectOutputBody1') }}
+      </p>
+      <p
+        v-if="!isSelectActive"
+        class="mt-2 px-4 text-xs text-muted-foreground leading-relaxed"
+      >
+        {{ t('builderToolbar.connectOutputBody2') }}
+      </p>
+      <div class="mt-4 flex items-center justify-end gap-2 px-4 pb-4">
+        <template v-if="isSelectActive">
+          <PopoverClose as-child>
+            <Button variant="secondary" size="md">
+              {{ t('g.ok') }}
+            </Button>
+          </PopoverClose>
+        </template>
+        <template v-else>
+          <PopoverClose as-child>
+            <Button variant="muted-textonly" size="md">
+              {{ t('g.cancel') }}
+            </Button>
+          </PopoverClose>
+          <PopoverClose as-child>
+            <Button variant="secondary" size="md" @click="emit('switch')">
+              {{ t('builderToolbar.switchToSelect') }}
+            </Button>
+          </PopoverClose>
+        </template>
+      </div>
+    </PopoverContent>
+  </PopoverRoot>
+</template>
+
+<script setup lang="ts">
+import {
+  PopoverClose,
+  PopoverContent,
+  PopoverRoot,
+  PopoverTrigger
+} from 'reka-ui'
+import { useI18n } from 'vue-i18n'
+
+import Button from '@/components/ui/button/Button.vue'
+
+const { isSelectActive = false } = defineProps<{
+  isSelectActive?: boolean
+}>()
+
+const { t } = useI18n()
+
+const emit = defineEmits<{
+  switch: []
+}>()
+</script>

src/components/builder/StepBadge.vue

@@ -0,0 +1,22 @@
+<template>
+  <div
+    class="flex size-10 shrink-0 items-center justify-center rounded-lg bg-interface-builder-mode-button-background text-interface-builder-mode-button-foreground"
+  >
+    <i v-if="modelValue === step.id" :class="cn(step.icon, 'size-5')" />
+    <span v-else class="text-sm font-bold">
+      {{ index + 1 }}
+    </span>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { cn } from '@/utils/tailwindUtil'
+
+import type { BuilderToolbarStep } from './types'
+
+defineProps<{
+  step: BuilderToolbarStep
+  index: number
+  modelValue: string
+}>()
+</script>

src/components/builder/StepLabel.vue

@@ -0,0 +1,20 @@
+<template>
+  <div class="flex flex-col gap-0.5 text-left">
+    <span class="text-sm font-medium text-base-foreground">
+      {{ step.title }}
+    </span>
+    <span
+      class="hidden whitespace-nowrap text-xs text-muted-foreground sm:inline"
+    >
+      {{ step.subtitle }}
+    </span>
+  </div>
+</template>
+
+<script setup lang="ts">
+import type { BuilderToolbarStep } from './types'
+
+const { step } = defineProps<{
+  step: BuilderToolbarStep
+}>()
+</script>

src/components/builder/types.ts

@@ -0,0 +1,6 @@
+export interface BuilderToolbarStep<T extends string = string> {
+  id: T
+  title: string
+  subtitle: string
+  icon: string
+}