feat: template publishing dialog, stepper, and step components

Rename template marketplace to template publishing throughout:
- Replace useTemplateMarketplaceDialog with useTemplatePublishingDialog
- Update core command from Comfy.ShowTemplateMarketplace to
  Comfy.ShowTemplatePublishing
- Update workflow actions menu label and command reference

Add multi-step publishing dialog infrastructure:
- TemplatePublishingDialog.vue with step-based navigation
- TemplatePublishingStepperNav.vue for step progress indicator
- useTemplatePublishingStepper composable managing step state,
  navigation, and validation
- Step components for each phase: landing, metadata, description,
  preview generation, category/tagging, preview, submission, complete
- StepTemplatePublishingMetadata with form fields for title, category,
  tags, difficulty, and license selection
- StepTemplatePublishingDescription with markdown editor and live
  preview via vue-i18n

Add comprehensive i18n entries for all publishing steps, form labels,
difficulty levels, license types, and category names.

Add tests for dialog lifecycle, stepper navigation/validation, metadata
form interaction, and description editing.

Bump version to 1.42.0.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/components/templatePublishing/TemplatePublishingDialog.vue

@@ -0,0 +1,153 @@
+<template>
+  <BaseModalLayout
+    :content-title="t('templatePublishing.dialogTitle')"
+    size="md"
+  >
+    <template #leftPanelHeaderTitle>
+      <i class="icon-[lucide--upload]" />
+      <h2 class="text-neutral text-base">
+        {{ t('templatePublishing.dialogTitle') }}
+      </h2>
+    </template>
+
+    <template #leftPanel>
+      <TemplatePublishingStepperNav
+        :current-step="currentStep"
+        :step-definitions="stepDefinitions"
+        @update:current-step="goToStep"
+      />
+    </template>
+
+    <template #header>
+      <div class="flex items-center gap-2">
+        <span class="text-muted-foreground text-sm">
+          {{
+            t('templatePublishing.stepProgress', {
+              current: currentStep,
+              total: totalSteps
+            })
+          }}
+        </span>
+      </div>
+    </template>
+
+    <template #header-right-area>
+      <div class="flex gap-2">
+        <Button
+          :disabled="isFirstStep"
+          variant="secondary"
+          size="lg"
+          @click="prevStep"
+        >
+          <i class="icon-[lucide--arrow-left]" />
+          {{ t('templatePublishing.previous') }}
+        </Button>
+        <Button variant="secondary" size="lg" @click="saveDraft">
+          <i class="icon-[lucide--save]" />
+          {{ t('templatePublishing.saveDraft') }}
+        </Button>
+        <Button
+          :disabled="currentStep >= totalSteps - 1"
+          size="lg"
+          @click="nextStep"
+        >
+          {{ t('templatePublishing.next') }}
+          <i class="icon-[lucide--arrow-right]" />
+        </Button>
+      </div>
+    </template>
+
+    <template #content>
+      <component :is="activeStepComponent" />
+    </template>
+  </BaseModalLayout>
+</template>
+
+<script setup lang="ts">
+import type { Component } from 'vue'
+import { computed, provide } from 'vue'
+import { useI18n } from 'vue-i18n'
+
+import { OnCloseKey } from '@/types/widgetTypes'
+
+import Button from '@/components/ui/button/Button.vue'
+import BaseModalLayout from '@/components/widget/layout/BaseModalLayout.vue'
+import { useTemplatePublishingStepper } from '@/composables/useTemplatePublishingStepper'
+
+import TemplatePublishingStepperNav from './TemplatePublishingStepperNav.vue'
+import StepTemplatePublishingCategoryAndTagging from './steps/StepTemplatePublishingCategoryAndTagging.vue'
+import StepTemplatePublishingComplete from './steps/StepTemplatePublishingComplete.vue'
+import StepTemplatePublishingDescription from './steps/StepTemplatePublishingDescription.vue'
+import StepTemplatePublishingLanding from './steps/StepTemplatePublishingLanding.vue'
+import StepTemplatePublishingMetadata from './steps/StepTemplatePublishingMetadata.vue'
+import StepTemplatePublishingPreview from './steps/StepTemplatePublishingPreview.vue'
+import StepTemplatePublishingPreviewGeneration from './steps/StepTemplatePublishingPreviewGeneration.vue'
+import StepTemplatePublishingSubmissionForReview from './steps/StepTemplatePublishingSubmissionForReview.vue'
+import { PublishingStepperKey } from './types'
+
+const { onClose, initialPage } = defineProps<{
+  onClose: () => void
+  initialPage?: string
+}>()
+
+const { t } = useI18n()
+
+provide(OnCloseKey, onClose)
+
+const STEP_PAGE_MAP: Record<string, number> = {
+  publishingLanding: 1,
+  metadata: 2,
+  description: 3,
+  previewGeneration: 4,
+  categoryAndTagging: 5,
+  preview: 6,
+  submissionForReview: 7,
+  complete: 8
+}
+
+const initialStep = initialPage ? (STEP_PAGE_MAP[initialPage] ?? 1) : 1
+
+const {
+  currentStep,
+  totalSteps,
+  template,
+  stepDefinitions,
+  isFirstStep,
+  isLastStep,
+  canProceed,
+  nextStep,
+  prevStep,
+  goToStep,
+  saveDraft,
+  setStepValid
+} = useTemplatePublishingStepper({ initialStep })
+
+const STEP_COMPONENTS: Component[] = [
+  StepTemplatePublishingLanding,
+  StepTemplatePublishingMetadata,
+  StepTemplatePublishingDescription,
+  StepTemplatePublishingPreviewGeneration,
+  StepTemplatePublishingCategoryAndTagging,
+  StepTemplatePublishingPreview,
+  StepTemplatePublishingSubmissionForReview,
+  StepTemplatePublishingComplete
+]
+
+const activeStepComponent = computed(
+  () => STEP_COMPONENTS[currentStep.value - 1]
+)
+
+provide(PublishingStepperKey, {
+  currentStep,
+  totalSteps,
+  isFirstStep,
+  isLastStep,
+  canProceed,
+  template,
+  nextStep,
+  prevStep,
+  goToStep,
+  saveDraft,
+  setStepValid
+})
+</script>