feat: workflow sharing and ComfyHub publish flow (#8951)

## Summary

Add workflow sharing by URL and a multi-step ComfyHub publish wizard,
gated by feature flags and an optional profile gate.

## Changes

- **What**: Share dialog with URL generation and asset warnings;
ComfyHub publish wizard (Describe → Examples → Finish) with thumbnail
upload and tags; profile gate flow; shared workflow URL loader with
confirmation dialog
- **Dependencies**: None (new `sharing/` module under
`src/platform/workflow/`)

## Review Focus

- Three new feature flags: `workflow_sharing_enabled`,
`comfyhub_upload_enabled`, `comfyhub_profile_gate_enabled`
- Share service API contract and stale-share detection
(`workflowShareService.ts`)
- Publish wizard and profile gate state management
- Shared workflow URL loading and query-param preservation

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8951-feat-share-workflow-by-URL-30b6d73d3650813ebbfafdad775bfb33)
by [Unito](https://www.unito.io)

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Co-authored-by: Amp <amp@ampcode.com>
Co-authored-by: github-actions <github-actions@github.com>
Co-authored-by: GitHub Action <action@github.com>

src/components/ui/input/Input.stories.ts

@@ -0,0 +1,33 @@
+import type { Meta, StoryObj } from '@storybook/vue3-vite'
+
+import Input from './Input.vue'
+
+const meta: Meta<typeof Input> = {
+  title: 'Components/Input',
+  component: Input,
+  tags: ['autodocs'],
+  render: (args) => ({
+    components: { Input },
+    setup: () => ({ args }),
+    template: '<Input v-bind="args" placeholder="Enter text..." />'
+  })
+}
+
+export default meta
+type Story = StoryObj<typeof meta>
+
+export const Default: Story = {}
+
+export const WithValue: Story = {
+  args: {
+    modelValue: 'Hello, world!'
+  }
+}
+
+export const Disabled: Story = {
+  render: (args) => ({
+    components: { Input },
+    setup: () => ({ args }),
+    template: '<Input v-bind="args" placeholder="Disabled input" disabled />'
+  })
+}

src/components/ui/input/Input.vue

@@ -0,0 +1,32 @@
+<script setup lang="ts">
+import type { HTMLAttributes } from 'vue'
+import { useTemplateRef } from 'vue'
+
+import { cn } from '@/utils/tailwindUtil'
+
+const { class: className } = defineProps<{
+  class?: HTMLAttributes['class']
+}>()
+
+const modelValue = defineModel<string | number>()
+
+const inputRef = useTemplateRef<HTMLInputElement>('inputEl')
+
+defineExpose({
+  focus: () => inputRef.value?.focus(),
+  select: () => inputRef.value?.select()
+})
+</script>
+
+<template>
+  <input
+    ref="inputEl"
+    v-model="modelValue"
+    :class="
+      cn(
+        'flex h-10 w-full min-w-0 appearance-none rounded-lg border-none bg-secondary-background px-4 py-2 text-sm text-base-foreground placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-border-default disabled:pointer-events-none disabled:opacity-50',
+        className
+      )
+    "
+  />
+</template>

src/components/ui/tags-input/TagsInput.vue

@@ -16,9 +16,15 @@ import type { FocusCallback } from './tagsInputContext'
 
 const {
   disabled = false,
+  alwaysEditing = false,
   class: className,
   ...restProps
-} = defineProps<TagsInputRootProps<T> & { class?: HTMLAttributes['class'] }>()
+} = defineProps<
+  TagsInputRootProps<T> & {
+    class?: HTMLAttributes['class']
+    alwaysEditing?: boolean
+  }
+>()
 const emits = defineEmits<TagsInputRootEmits<T>>()
 
 const isEditing = ref(false)
@@ -28,9 +34,10 @@ const focusInput = ref<FocusCallback>()
 provide(tagsInputFocusKey, (callback: FocusCallback) => {
   focusInput.value = callback
 })
-provide(tagsInputIsEditingKey, isEditing)
+const isEditingEnabled = computed(() => alwaysEditing || isEditing.value)
+provide(tagsInputIsEditingKey, isEditingEnabled)
 
-const internalDisabled = computed(() => disabled || !isEditing.value)
+const internalDisabled = computed(() => disabled || !isEditingEnabled.value)
 
 const delegatedProps = computed(() => ({
   ...restProps,
@@ -40,7 +47,7 @@ const delegatedProps = computed(() => ({
 const forwarded = useForwardPropsEmits(delegatedProps, emits)
 
 async function enableEditing() {
-  if (!disabled && !isEditing.value) {
+  if (!disabled && !alwaysEditing && !isEditing.value) {
     isEditing.value = true
     await nextTick()
     focusInput.value?.()
@@ -48,7 +55,9 @@ async function enableEditing() {
 }
 
 onClickOutside(rootEl, () => {
-  isEditing.value = false
+  if (!alwaysEditing) {
+    isEditing.value = false
+  }
 })
 </script>
 
@@ -61,7 +70,7 @@ onClickOutside(rootEl, () => {
         'group relative flex flex-wrap items-center gap-2 rounded-lg bg-transparent p-2 text-xs text-base-foreground',
         !internalDisabled &&
           'hover:bg-modal-card-background-hovered focus-within:bg-modal-card-background-hovered',
-        !disabled && !isEditing && 'cursor-pointer',
+        !disabled && !isEditingEnabled && 'cursor-pointer',
         className
       )
     "
@@ -69,7 +78,7 @@ onClickOutside(rootEl, () => {
   >
     <slot :is-empty="modelValue.length === 0" />
     <i
-      v-if="!disabled && !isEditing"
+      v-if="!disabled && !isEditingEnabled"
       aria-hidden="true"
       class="icon-[lucide--square-pen] absolute bottom-2 right-2 size-4 text-muted-foreground transition-opacity opacity-0 group-hover:opacity-100"
     />

src/components/ui/textarea/Textarea.vue

@@ -16,7 +16,7 @@ const modelValue = defineModel<string | number>()
     v-model="modelValue"
     :class="
       cn(
-        'flex min-h-16 w-full rounded-md border border-input bg-transparent px-3 py-2 text-sm shadow-xs placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring disabled:cursor-not-allowed disabled:opacity-50',
+        'flex min-h-16 w-full rounded-lg border-none bg-secondary-background px-3 py-2 text-sm text-base-foreground placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-border-default disabled:pointer-events-none disabled:opacity-50',
         className
       )
     "