feat: add WizardTrainingStep opt-in consent step to onboarding

Inserts a new optional Training Export step between Resume and Identity
in the setup wizard. Users can opt in to saving cover letters for
fine-tuning dataset export. Consent copy distinguishes local vs. cloud
storage. WIZARD_STEPS bumped to 7; router, and adjacent step
back/next navigation updated accordingly.

web/src/router/index.ts

@@ -46,6 +46,7 @@ export const router = createRouter({
         { path: 'hardware',   component: () => import('../views/wizard/WizardHardwareStep.vue') },
         { path: 'tier',       component: () => import('../views/wizard/WizardTierStep.vue') },
         { path: 'resume',     component: () => import('../views/wizard/WizardResumeStep.vue') },
+        { path: 'training',   component: () => import('../views/wizard/WizardTrainingStep.vue') },
         { path: 'identity',   component: () => import('../views/wizard/WizardIdentityStep.vue') },
         { path: 'inference',  component: () => import('../views/wizard/WizardInferenceStep.vue') },
         { path: 'search',     component: () => import('../views/wizard/WizardSearchStep.vue') },

web/src/stores/wizard.ts

@@ -44,7 +44,7 @@ export interface WizardInferenceData {
 }
 
 // Total mandatory steps (integrations step 7 is optional/skip-able)
-export const WIZARD_STEPS = 6
+export const WIZARD_STEPS = 7
 export const STEP_LABELS = ['Hardware', 'Tier', 'Resume', 'Identity', 'Inference', 'Search', 'Integrations']
 export const STEP_ROUTES = [
   '/setup/hardware',

web/src/views/wizard/WizardIdentityStep.vue

@@ -74,7 +74,7 @@ const form = reactive({
   careerSummary: wizard.identity.careerSummary,
 })
 
-function back() { router.push('/setup/resume') }
+function back() { router.push('/setup/training') }
 
 async function next() {
   validationError.value = ''

web/src/views/wizard/WizardResumeStep.vue

@@ -216,7 +216,7 @@ async function next() {
     experience: wizard.resume.experience,
     ...(wizard.resume.parsedData ?? {}),
   }})
-  if (ok) router.push('/setup/identity')
+  if (ok) router.push('/setup/training')
 }
 </script>
 

web/src/views/wizard/WizardTrainingStep.vue

@@ -0,0 +1,74 @@
+<script setup lang="ts">
+import { ref } from 'vue'
+import { useRouter } from 'vue-router'
+import { useAppConfigStore } from '../../stores/appConfig'
+
+const router = useRouter()
+const config = useAppConfigStore()
+const optIn = ref(false)
+const saving = ref(false)
+
+async function next() {
+  saving.value = true
+  try {
+    if (optIn.value) {
+      await fetch('/api/settings/fine-tune/opt-in', {
+        method: 'PATCH',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ enabled: true }),
+      })
+    }
+    router.push('/setup/identity')
+  } finally {
+    saving.value = false
+  }
+}
+
+function back() { router.push('/setup/resume') }
+</script>
+
+<template>
+  <div class="wizard-step">
+    <h2 class="step-title">
+      Training Export
+      <span class="optional-badge">Optional</span>
+    </h2>
+    <p class="step-body">
+      Would you like to save your cover letters for training export?
+      This lets you build a personal dataset to fine-tune a language model to your writing style.
+    </p>
+    <p v-if="!config.isCloud" class="step-body-note">
+      Your data stays on your device unless you explicitly request cloud fine-tuning.
+    </p>
+    <p v-else class="step-body-note">
+      Your cover letters are stored on your CircuitForge account.
+      They are not shared with any third party unless you request cloud fine-tuning.
+    </p>
+
+    <label class="opt-in-label">
+      <input type="checkbox" v-model="optIn" />
+      Yes, include my cover letters in training export
+    </label>
+
+    <div class="step-actions">
+      <button class="btn-ghost" @click="back">
+        <span aria-hidden="true">←</span> Back
+      </button>
+      <button class="btn-primary" :disabled="saving" :aria-busy="saving" @click="next">
+        {{ saving ? 'Saving…' : 'Continue' }}
+        <span v-if="!saving" aria-hidden="true">→</span>
+      </button>
+    </div>
+  </div>
+</template>
+
+<style scoped>
+.wizard-step { display: flex; flex-direction: column; gap: var(--space-5, 1.25rem); }
+.step-title { font-family: var(--font-display); font-size: 1.25rem; font-weight: 700; display: flex; align-items: center; gap: var(--space-2, 0.5rem); }
+.optional-badge { font-family: var(--font-sans); font-size: 0.75rem; font-weight: 500; background: var(--color-surface-alt); color: var(--color-text-muted); padding: 2px 8px; border-radius: var(--radius-full, 9999px); }
+.step-body { font-size: 0.9rem; color: var(--color-text); line-height: 1.6; }
+.step-body-note { font-size: 0.85rem; color: var(--color-text-muted); line-height: 1.5; margin-top: calc(-1 * var(--space-3, 0.75rem)); }
+.opt-in-label { display: flex; align-items: flex-start; gap: var(--space-2, 0.5rem); font-size: 0.9rem; cursor: pointer; }
+.opt-in-label input[type="checkbox"] { margin-top: 2px; width: 16px; height: 16px; accent-color: var(--color-primary); flex-shrink: 0; cursor: pointer; }
+.step-actions { display: flex; gap: var(--space-3, 0.75rem); justify-content: flex-end; padding-top: var(--space-4, 1rem); border-top: 1px solid var(--color-border-light); }
+</style>