refactor: standardize admin templates with shared macros

Migrate all admin templates to use standardized components:
- Use tabs macros (tabs_nav, tab_button) for tab navigation
- Use number_stepper for quantity/numeric inputs
- Use headers macros for consistent page layouts
- Use modals macros for dialog components

Affected pages: dashboard, settings, logs, content-pages, companies,
vendors, users, imports, marketplace, code-quality, and more.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/templates/admin/code-quality-violation-detail.html

@@ -1,5 +1,7 @@
 {# app/templates/admin/code-quality-violation-detail.html #}
 {% extends "admin/base.html" %}
+{% from 'shared/macros/headers.html' import page_header %}
+{% from 'shared/macros/alerts.html' import loading_state, error_state %}
 
 {% block title %}Violation Detail{% endblock %}
 
@@ -159,37 +161,11 @@ function codeQualityViolationDetail(violationId) {
 {% endblock %}
 
 {% block content %}
-<!-- Page Header -->
-<div class="flex items-center justify-between my-6">
-    <div>
-        <h2 class="text-2xl font-semibold text-gray-700 dark:text-gray-200">
-            Violation Details
-        </h2>
-        <p class="text-sm text-gray-600 dark:text-gray-400 mt-1">
-            Review and manage architecture violation
-        </p>
-    </div>
-    <a href="/admin/code-quality/violations"
-       class="flex items-center px-4 py-2 text-sm font-medium leading-5 text-gray-700 dark:text-gray-300 transition-colors duration-150 bg-white dark:bg-gray-800 border border-gray-300 dark:border-gray-600 rounded-lg hover:bg-gray-50 dark:hover:bg-gray-700 focus:outline-none focus:shadow-outline-gray">
-        <span x-html="$icon('arrow-left', 'w-4 h-4 mr-2')"></span>
-        Back to Violations
-    </a>
-</div>
+{{ page_header('Violation Details', subtitle='Review and manage architecture violation', back_url='/admin/code-quality/violations', back_label='Back to Violations') }}
 
-<!-- Loading State -->
-<div x-show="loading" class="text-center py-12">
-    <span x-html="$icon('spinner', 'inline w-8 h-8 text-purple-600')"></span>
-    <p class="mt-2 text-gray-600 dark:text-gray-400">Loading violation details...</p>
-</div>
+{{ loading_state('Loading violation details...') }}
 
-<!-- Error State -->
-<div x-show="error && !loading" class="mb-6 p-4 bg-red-100 border border-red-400 text-red-700 rounded-lg flex items-start">
-    <span x-html="$icon('exclamation', 'w-5 h-5 mr-3 mt-0.5 flex-shrink-0')"></span>
-    <div>
-        <p class="font-semibold">Error loading violation</p>
-        <p class="text-sm" x-text="error"></p>
-    </div>
-</div>
+{{ error_state('Error loading violation') }}
 
 <!-- Content -->
 <div x-show="!loading && violation" class="grid gap-6 mb-8">
@@ -259,6 +235,7 @@ function codeQualityViolationDetail(violationId) {
         <div class="mb-6" x-show="violation.status === 'open' || violation.status === 'assigned'">
             <label class="block text-sm font-medium text-gray-700 dark:text-gray-400 mb-2">Assign to User</label>
             <div class="flex gap-2">
+                {# noqa: FE-008 - User ID is typed directly, not incremented #}
                 <input x-model="assignUserId"
                        type="number"
                        placeholder="User ID"