frontend error management enhancement

app/templates/admin/errors/429.html

@@ -0,0 +1,52 @@
+{% extends "admin/errors/base.html" %}
+
+{% block icon %}⏱️{% endblock %}
+
+{% block title %}429 - Too Many Requests{% endblock %}
+
+{% block content %}
+<div class="error-icon">⏱️</div>
+<div class="status-code">429</div>
+<div class="status-name">Too Many Requests</div>
+<div class="error-message">
+    You've made too many requests in a short period. Please slow down and try again in a moment.
+</div>
+<div class="error-code">Error Code: {{ error_code }}</div>
+
+{% if details and details.retry_after %}
+<div style="margin: 1.5rem 0; padding: 1rem; background: #fef3c7; border-radius: 0.5rem;">
+    <p style="color: #92400e; font-weight: 600;">
+        Please wait {{ details.retry_after }} seconds before trying again.
+    </p>
+</div>
+{% endif %}
+
+<div class="action-buttons">
+    <a href="javascript:location.reload()" class="btn btn-primary">Retry</a>
+    <a href="/admin/dashboard" class="btn btn-secondary">Dashboard</a>
+</div>
+
+{% if show_debug %}
+<div class="debug-info">
+    <h3>🔧 Debug Information (Admin Only)</h3>
+    <div class="debug-item">
+        <span class="debug-label">Path:</span>
+        <span class="debug-value">{{ path }}</span>
+    </div>
+    <div class="debug-item">
+        <span class="debug-label">Error Code:</span>
+        <span class="debug-value">{{ error_code }}</span>
+    </div>
+    {% if details %}
+    <div class="debug-item">
+        <span class="debug-label">Details:</span>
+        <pre>{{ details | tojson(indent=2) }}</pre>
+    </div>
+    {% endif %}
+</div>
+{% endif %}
+
+<div class="support-link">
+    Experiencing persistent rate limits? <a href="/admin/support">Contact Support</a>
+</div>
+{% endblock %}