feat: add Jinja2 server-side rendering with template components and locust load testing

Introduce a full server-side rendering pipeline using Jinja2Templates, including base layout, navigation, modals, and rant card components. Add a classic.html static fallback page and a locustfile.py for load testing the new endpoints. Update main.py to mount static files, create template directories on startup, and add a format_time helper for relative timestamps.

templates/search.html

@@ -0,0 +1,23 @@
+{% extends 'base.html' %}
+{% from 'components/rant_card.html' import render_rant_card %}
+
+{% block content %}
+<div class="search-box">
+    <form class="search-form" action="/search" method="GET">
+        <input type="text" name="term" placeholder="Search rants..." value="{{ search_term or '' }}" required>
+        <button type="submit" class="btn">Search</button>
+    </form>
+</div>
+
+<div id="searchResults">
+    {% if search_term %}
+        {% if results %}
+            {% for rant in results %}
+                {{ render_rant_card(rant) }}
+            {% endfor %}
+        {% else %}
+            <p style="text-align: center; color: var(--text-dim);">No results found</p>
+        {% endif %}
+    {% endif %}
+</div>
+{% endblock %}