feat(billing): migrate frontend templates to feature provider system

Replace hardcoded subscription fields (orders_limit, products_limit,
team_members_limit) across 5 frontend pages with dynamic feature
provider APIs. Add admin convenience endpoint for store subscription
lookup. Remove legacy stubs (StoreSubscription, FeatureCode, Feature,
TIER_LIMITS, FeatureInfo, FeatureUpgradeInfo) and schema aliases.

Pages updated:
- Admin subscriptions: dynamic feature overrides editor
- Admin tiers: correct feature catalog/limits API URLs
- Store billing: usage metrics from /store/billing/usage
- Merchant subscription detail: tier.feature_limits rendering
- Admin store detail: new GET /admin/subscriptions/store/{id} endpoint

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

app/modules/tenancy/templates/tenancy/admin/store-detail.html

@@ -0,0 +1,388 @@
+{# app/templates/admin/store-detail.html #}
+{% extends "admin/base.html" %}
+{% from 'shared/macros/alerts.html' import loading_state, error_state %}
+{% from 'shared/macros/headers.html' import detail_page_header %}
+
+{% block title %}Store Details{% endblock %}
+
+{% block alpine_data %}adminStoreDetail(){% endblock %}
+
+{% block content %}
+{% call detail_page_header("store?.name || 'Store Details'", '/admin/stores', subtitle_show='store') %}
+    <span x-text="storeCode"></span>
+    <span class="text-gray-400 mx-2">•</span>
+    <span x-text="store?.subdomain"></span>
+{% endcall %}
+
+{{ loading_state('Loading store details...') }}
+
+{{ error_state('Error loading store') }}
+
+<!-- Store Details -->
+<div x-show="!loading && store">
+    <!-- Quick Actions Card -->
+    <div class="px-4 py-3 mb-6 bg-white rounded-lg shadow-md dark:bg-gray-800">
+        <h3 class="mb-4 text-lg font-semibold text-gray-700 dark:text-gray-200">
+            Quick Actions
+        </h3>
+        <div class="flex flex-wrap items-center gap-3">
+            <a
+                :href="`/admin/stores/${storeCode}/edit`"
+                class="flex items-center px-4 py-2 text-sm font-medium leading-5 text-white transition-colors duration-150 bg-purple-600 border border-transparent rounded-lg hover:bg-purple-700 focus:outline-none focus:shadow-outline-purple">
+                <span x-html="$icon('edit', 'w-4 h-4 mr-2')"></span>
+                Edit Store
+            </a>
+            <button
+                @click="deleteStore()"
+                class="flex items-center px-4 py-2 text-sm font-medium leading-5 text-white transition-colors duration-150 bg-red-600 border border-transparent rounded-lg hover:bg-red-700 focus:outline-none focus:shadow-outline-red">
+                <span x-html="$icon('delete', 'w-4 h-4 mr-2')"></span>
+                Delete Store
+            </button>
+        </div>
+    </div>
+
+    <!-- Status Cards -->
+    <div class="grid gap-6 mb-8 md:grid-cols-4">
+        <!-- Verification Status -->
+        <div class="flex items-center p-4 bg-white rounded-lg shadow-xs dark:bg-gray-800">
+            <div class="p-3 mr-4 rounded-full" 
+                 :class="store?.is_verified ? 'text-green-500 bg-green-100 dark:text-green-100 dark:bg-green-500' : 'text-orange-500 bg-orange-100 dark:text-orange-100 dark:bg-orange-500'">
+                <span x-html="$icon(store?.is_verified ? 'badge-check' : 'clock', 'w-5 h-5')"></span>
+            </div>
+            <div>
+                <p class="mb-2 text-sm font-medium text-gray-600 dark:text-gray-400">
+                    Verification
+                </p>
+                <p class="text-lg font-semibold text-gray-700 dark:text-gray-200" x-text="store?.is_verified ? 'Verified' : 'Pending'">
+                    -
+                </p>
+            </div>
+        </div>
+
+        <!-- Active Status -->
+        <div class="flex items-center p-4 bg-white rounded-lg shadow-xs dark:bg-gray-800">
+            <div class="p-3 mr-4 rounded-full"
+                 :class="store?.is_active ? 'text-green-500 bg-green-100 dark:text-green-100 dark:bg-green-500' : 'text-red-500 bg-red-100 dark:text-red-100 dark:bg-red-500'">
+                <span x-html="$icon(store?.is_active ? 'check-circle' : 'x-circle', 'w-5 h-5')"></span>
+            </div>
+            <div>
+                <p class="mb-2 text-sm font-medium text-gray-600 dark:text-gray-400">
+                    Status
+                </p>
+                <p class="text-lg font-semibold text-gray-700 dark:text-gray-200" x-text="store?.is_active ? 'Active' : 'Inactive'">
+                    -
+                </p>
+            </div>
+        </div>
+
+        <!-- Created Date -->
+        <div class="flex items-center p-4 bg-white rounded-lg shadow-xs dark:bg-gray-800">
+            <div class="p-3 mr-4 text-blue-500 bg-blue-100 rounded-full dark:text-blue-100 dark:bg-blue-500">
+                <span x-html="$icon('calendar', 'w-5 h-5')"></span>
+            </div>
+            <div>
+                <p class="mb-2 text-sm font-medium text-gray-600 dark:text-gray-400">
+                    Created
+                </p>
+                <p class="text-sm font-semibold text-gray-700 dark:text-gray-200" x-text="formatDate(store?.created_at)">
+                    -
+                </p>
+            </div>
+        </div>
+
+        <!-- Updated Date -->
+        <div class="flex items-center p-4 bg-white rounded-lg shadow-xs dark:bg-gray-800">
+            <div class="p-3 mr-4 text-purple-500 bg-purple-100 rounded-full dark:text-purple-100 dark:bg-purple-500">
+                <span x-html="$icon('refresh', 'w-5 h-5')"></span>
+            </div>
+            <div>
+                <p class="mb-2 text-sm font-medium text-gray-600 dark:text-gray-400">
+                    Last Updated
+                </p>
+                <p class="text-sm font-semibold text-gray-700 dark:text-gray-200" x-text="formatDate(store?.updated_at)">
+                    -
+                </p>
+            </div>
+        </div>
+    </div>
+
+    <!-- Subscription Card -->
+    <div class="px-4 py-3 mb-6 bg-white rounded-lg shadow-md dark:bg-gray-800" x-show="subscription">
+        <div class="flex items-center justify-between mb-4">
+            <h3 class="text-lg font-semibold text-gray-700 dark:text-gray-200">
+                Subscription
+            </h3>
+            <button
+                @click="showSubscriptionModal = true"
+                class="flex items-center px-3 py-1.5 text-sm font-medium text-purple-600 hover:text-purple-700 dark:text-purple-400 dark:hover:text-purple-300">
+                <span x-html="$icon('edit', 'w-4 h-4 mr-1')"></span>
+                Edit
+            </button>
+        </div>
+
+        <!-- Tier and Status -->
+        <div class="flex flex-wrap items-center gap-4 mb-4">
+            <div class="flex items-center gap-2">
+                <span class="text-sm text-gray-600 dark:text-gray-400">Tier:</span>
+                <span class="px-2.5 py-0.5 text-sm font-medium rounded-full"
+                      :class="{
+                          'bg-gray-100 text-gray-800 dark:bg-gray-700 dark:text-gray-300': subscription?.tier === 'essential',
+                          'bg-blue-100 text-blue-800 dark:bg-blue-900 dark:text-blue-300': subscription?.tier === 'professional',
+                          'bg-purple-100 text-purple-800 dark:bg-purple-900 dark:text-purple-300': subscription?.tier === 'business',
+                          'bg-yellow-100 text-yellow-800 dark:bg-yellow-900 dark:text-yellow-300': subscription?.tier === 'enterprise'
+                      }"
+                      x-text="subscription?.tier ? subscription.tier.charAt(0).toUpperCase() + subscription.tier.slice(1) : '-'">
+                </span>
+            </div>
+            <div class="flex items-center gap-2">
+                <span class="text-sm text-gray-600 dark:text-gray-400">Status:</span>
+                <span class="px-2.5 py-0.5 text-sm font-medium rounded-full"
+                      :class="{
+                          'bg-green-100 text-green-800 dark:bg-green-900 dark:text-green-300': subscription?.status === 'active',
+                          'bg-blue-100 text-blue-800 dark:bg-blue-900 dark:text-blue-300': subscription?.status === 'trial',
+                          'bg-yellow-100 text-yellow-800 dark:bg-yellow-900 dark:text-yellow-300': subscription?.status === 'past_due',
+                          'bg-red-100 text-red-800 dark:bg-red-900 dark:text-red-300': subscription?.status === 'cancelled' || subscription?.status === 'expired'
+                      }"
+                      x-text="subscription?.status ? subscription.status.replace('_', ' ').charAt(0).toUpperCase() + subscription.status.slice(1) : '-'">
+                </span>
+            </div>
+            <template x-if="subscription?.is_annual">
+                <span class="px-2.5 py-0.5 text-xs font-medium text-purple-800 bg-purple-100 rounded-full dark:bg-purple-900 dark:text-purple-300">
+                    Annual
+                </span>
+            </template>
+        </div>
+
+        <!-- Period Info -->
+        <div class="flex flex-wrap gap-4 mb-4 text-sm">
+            <div>
+                <span class="text-gray-600 dark:text-gray-400">Period:</span>
+                <span class="ml-1 text-gray-700 dark:text-gray-300" x-text="formatDate(subscription?.period_start)"></span>
+                <span class="text-gray-400">→</span>
+                <span class="text-gray-700 dark:text-gray-300" x-text="formatDate(subscription?.period_end)"></span>
+            </div>
+            <template x-if="subscription?.trial_ends_at">
+                <div>
+                    <span class="text-gray-600 dark:text-gray-400">Trial ends:</span>
+                    <span class="ml-1 text-gray-700 dark:text-gray-300" x-text="formatDate(subscription?.trial_ends_at)"></span>
+                </div>
+            </template>
+        </div>
+
+        <!-- Usage Meters -->
+        <div class="grid gap-4 md:grid-cols-3">
+            <template x-for="metric in usageMetrics" :key="metric.name">
+                <div class="p-3 bg-gray-50 rounded-lg dark:bg-gray-700">
+                    <div class="flex items-center justify-between mb-2">
+                        <span class="text-xs font-medium text-gray-600 dark:text-gray-400 uppercase" x-text="metric.name"></span>
+                    </div>
+                    <div class="flex items-baseline gap-1">
+                        <span class="text-xl font-bold text-gray-700 dark:text-gray-200" x-text="metric.current"></span>
+                        <span class="text-sm text-gray-500 dark:text-gray-400">
+                            / <span x-text="metric.is_unlimited ? '∞' : metric.limit"></span>
+                        </span>
+                    </div>
+                    <div class="mt-2 h-1.5 bg-gray-200 rounded-full dark:bg-gray-600" x-show="!metric.is_unlimited">
+                        <div class="h-1.5 rounded-full transition-all"
+                             :class="getUsageBarColor(metric.current, metric.limit)"
+                             :style="`width: ${Math.min(100, metric.percentage || 0)}%`">
+                        </div>
+                    </div>
+                </div>
+            </template>
+            <template x-if="usageMetrics.length === 0">
+                <div class="p-3 bg-gray-50 rounded-lg dark:bg-gray-700 md:col-span-3">
+                    <p class="text-sm text-gray-500 dark:text-gray-400 text-center">No usage data available</p>
+                </div>
+            </template>
+        </div>
+    </div>
+
+    <!-- No Subscription Notice -->
+    <div class="px-4 py-3 mb-6 bg-yellow-50 border border-yellow-200 rounded-lg dark:bg-yellow-900/20 dark:border-yellow-800" x-show="!subscription && !loading">
+        <div class="flex items-center gap-3">
+            <span x-html="$icon('exclamation', 'w-5 h-5 text-yellow-600 dark:text-yellow-400')"></span>
+            <div>
+                <p class="text-sm font-medium text-yellow-800 dark:text-yellow-200">No Subscription Found</p>
+                <p class="text-sm text-yellow-700 dark:text-yellow-300">This store doesn't have a subscription yet.</p>
+            </div>
+            <button
+                @click="createSubscription()"
+                class="ml-auto px-3 py-1.5 text-sm font-medium text-white bg-yellow-600 rounded-lg hover:bg-yellow-700">
+                Create Subscription
+            </button>
+        </div>
+    </div>
+
+    <!-- Main Info Cards -->
+    <div class="grid gap-6 mb-8 md:grid-cols-2">
+        <!-- Basic Information -->
+        <div class="px-4 py-3 bg-white rounded-lg shadow-md dark:bg-gray-800">
+            <h3 class="mb-4 text-lg font-semibold text-gray-700 dark:text-gray-200">
+                Basic Information
+            </h3>
+            <div class="space-y-3">
+                <div>
+                    <p class="text-xs font-semibold text-gray-600 dark:text-gray-400 uppercase">Store Code</p>
+                    <p class="text-sm text-gray-700 dark:text-gray-300" x-text="store?.store_code || '-'">-</p>
+                </div>
+                <div>
+                    <p class="text-xs font-semibold text-gray-600 dark:text-gray-400 uppercase">Name</p>
+                    <p class="text-sm text-gray-700 dark:text-gray-300" x-text="store?.name || '-'">-</p>
+                </div>
+                <div>
+                    <p class="text-xs font-semibold text-gray-600 dark:text-gray-400 uppercase">Subdomain</p>
+                    <p class="text-sm text-gray-700 dark:text-gray-300" x-text="store?.subdomain || '-'">-</p>
+                </div>
+                <div>
+                    <p class="text-xs font-semibold text-gray-600 dark:text-gray-400 uppercase">Description</p>
+                    <p class="text-sm text-gray-700 dark:text-gray-300" x-text="store?.description || 'No description provided'">-</p>
+                </div>
+            </div>
+        </div>
+
+        <!-- Contact Information -->
+        <div class="px-4 py-3 bg-white rounded-lg shadow-md dark:bg-gray-800">
+            <h3 class="mb-4 text-lg font-semibold text-gray-700 dark:text-gray-200">
+                Contact Information
+            </h3>
+            <div class="space-y-3">
+                <div>
+                    <p class="text-xs font-semibold text-gray-600 dark:text-gray-400 uppercase">Owner Email</p>
+                    <p class="text-sm text-gray-700 dark:text-gray-300" x-text="store?.owner_email || '-'">-</p>
+                    <p class="text-xs text-gray-500 dark:text-gray-400">Owner's authentication email</p>
+                </div>
+                <div>
+                    <p class="text-xs font-semibold text-gray-600 dark:text-gray-400 uppercase">Contact Email</p>
+                    <p class="text-sm text-gray-700 dark:text-gray-300" x-text="store?.contact_email || '-'">-</p>
+                    <p class="text-xs text-gray-500 dark:text-gray-400">Public business contact</p>
+                </div>
+                <div>
+                    <p class="text-xs font-semibold text-gray-600 dark:text-gray-400 uppercase">Phone</p>
+                    <p class="text-sm text-gray-700 dark:text-gray-300" x-text="store?.contact_phone || '-'">-</p>
+                </div>
+                <div>
+                    <p class="text-xs font-semibold text-gray-600 dark:text-gray-400 uppercase">Website</p>
+                    <a 
+                        x-show="store?.website"
+                        :href="store?.website" 
+                        target="_blank"
+                        class="text-sm text-purple-600 hover:text-purple-700 dark:text-purple-400" 
+                        x-text="store?.website">
+                    </a>
+                    <span x-show="!store?.website" class="text-sm text-gray-700 dark:text-gray-300">-</span>
+                </div>
+            </div>
+        </div>
+    </div>
+
+    <!-- Business Details -->
+    <div class="px-4 py-3 mb-8 bg-white rounded-lg shadow-md dark:bg-gray-800">
+        <h3 class="mb-4 text-lg font-semibold text-gray-700 dark:text-gray-200">
+            Business Details
+        </h3>
+        <div class="grid gap-6 md:grid-cols-2">
+            <div>
+                <p class="text-xs font-semibold text-gray-600 dark:text-gray-400 uppercase mb-2">Business Address</p>
+                <p class="text-sm text-gray-700 dark:text-gray-300 whitespace-pre-line" x-text="store?.business_address || 'No address provided'">-</p>
+            </div>
+            <div>
+                <p class="text-xs font-semibold text-gray-600 dark:text-gray-400 uppercase mb-2">Tax Number</p>
+                <p class="text-sm text-gray-700 dark:text-gray-300" x-text="store?.tax_number || 'Not provided'">-</p>
+            </div>
+        </div>
+    </div>
+
+    <!-- Owner Information -->
+    <div class="px-4 py-3 mb-8 bg-white rounded-lg shadow-md dark:bg-gray-800">
+        <h3 class="mb-4 text-lg font-semibold text-gray-700 dark:text-gray-200">
+            Owner Information
+        </h3>
+        <div class="grid gap-6 md:grid-cols-3">
+            <div>
+                <p class="text-xs font-semibold text-gray-600 dark:text-gray-400 uppercase mb-2">Owner User ID</p>
+                <p class="text-sm text-gray-700 dark:text-gray-300" x-text="store?.owner_user_id || '-'">-</p>
+            </div>
+            <div>
+                <p class="text-xs font-semibold text-gray-600 dark:text-gray-400 uppercase mb-2">Owner Username</p>
+                <p class="text-sm text-gray-700 dark:text-gray-300" x-text="store?.owner_username || '-'">-</p>
+            </div>
+            <div>
+                <p class="text-xs font-semibold text-gray-600 dark:text-gray-400 uppercase mb-2">Owner Email</p>
+                <p class="text-sm text-gray-700 dark:text-gray-300" x-text="store?.owner_email || '-'">-</p>
+            </div>
+        </div>
+    </div>
+
+    <!-- Marketplace URLs -->
+    <div class="px-4 py-3 mb-8 bg-white rounded-lg shadow-md dark:bg-gray-800" x-show="store?.letzshop_csv_url_fr || store?.letzshop_csv_url_en || store?.letzshop_csv_url_de">
+        <h3 class="mb-4 text-lg font-semibold text-gray-700 dark:text-gray-200">
+            Marketplace CSV URLs
+        </h3>
+        <div class="space-y-3">
+            <div x-show="store?.letzshop_csv_url_fr">
+                <p class="text-xs font-semibold text-gray-600 dark:text-gray-400 uppercase mb-1">French (FR)</p>
+                <a 
+                    :href="store?.letzshop_csv_url_fr" 
+                    target="_blank"
+                    class="text-sm text-purple-600 hover:text-purple-700 dark:text-purple-400 break-all" 
+                    x-text="store?.letzshop_csv_url_fr">
+                </a>
+            </div>
+            <div x-show="store?.letzshop_csv_url_en">
+                <p class="text-xs font-semibold text-gray-600 dark:text-gray-400 uppercase mb-1">English (EN)</p>
+                <a 
+                    :href="store?.letzshop_csv_url_en" 
+                    target="_blank"
+                    class="text-sm text-purple-600 hover:text-purple-700 dark:text-purple-400 break-all" 
+                    x-text="store?.letzshop_csv_url_en">
+                </a>
+            </div>
+            <div x-show="store?.letzshop_csv_url_de">
+                <p class="text-xs font-semibold text-gray-600 dark:text-gray-400 uppercase mb-1">German (DE)</p>
+                <a 
+                    :href="store?.letzshop_csv_url_de" 
+                    target="_blank"
+                    class="text-sm text-purple-600 hover:text-purple-700 dark:text-purple-400 break-all" 
+                    x-text="store?.letzshop_csv_url_de">
+                </a>
+            </div>
+        </div>
+    </div>
+
+    <!-- More Actions -->
+    <div class="px-4 py-3 bg-white rounded-lg shadow-md dark:bg-gray-800">
+        <h3 class="mb-4 text-lg font-semibold text-gray-700 dark:text-gray-200">
+            More Actions
+        </h3>
+        <div class="flex flex-wrap gap-3">
+            <!-- View Parent Merchant -->
+            <a
+                :href="'/admin/merchants/' + store?.merchant_id + '/edit'"
+                class="inline-flex items-center px-4 py-2 text-sm font-medium text-white transition-colors duration-150 bg-blue-600 border border-transparent rounded-lg hover:bg-blue-700 focus:outline-none focus:shadow-outline-blue"
+            >
+                <span x-html="$icon('office-building', 'w-4 h-4 mr-2')"></span>
+                View Parent Merchant
+            </a>
+
+            <!-- Customize Theme -->
+            <a
+                :href="`/admin/stores/${storeCode}/theme`"
+                class="inline-flex items-center px-4 py-2 text-sm font-medium text-white transition-colors duration-150 bg-purple-600 border border-transparent rounded-lg hover:bg-purple-700 focus:outline-none focus:shadow-outline-purple"
+            >
+                <span x-html="$icon('color-swatch', 'w-4 h-4 mr-2')"></span>
+                Customize Theme
+            </a>
+        </div>
+        <p class="mt-3 text-xs text-gray-500 dark:text-gray-400">
+            <span x-html="$icon('information-circle', 'w-4 h-4 inline mr-1')"></span>
+            This store belongs to merchant: <strong x-text="store?.merchant_name"></strong>.
+            Contact info and ownership are managed at the merchant level.
+        </p>
+    </div>
+</div>
+{% endblock %}
+
+{% block extra_scripts %}
+<script src="{{ url_for('tenancy_static', path='admin/js/store-detail.js') }}"></script>
+{% endblock %}