Initial implementation of IRC LLM bot

Full implementation from spec: ZNC/IRC client with TLS, Ollama LLM backend,
per-user SQLite conversation memory, and Flask web admin portal with 7 pages.

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

portal/templates/logs.html

@@ -0,0 +1,21 @@
+{% extends "base.html" %}
+{% block title %}Logs — IRC Bot Portal{% endblock %}
+{% block content %}
+<h1>Bot Logs</h1>
+
+<div class="log-toolbar">
+  <label>
+    <input type="checkbox" id="auto-refresh"> Auto-refresh (3s)
+  </label>
+  <a href="{{ url_for('logs_download') }}" class="btn btn-secondary btn-sm">Download</a>
+  <form method="post" action="{{ url_for('action_clear_log') }}" style="display:inline">
+    <button class="btn btn-danger btn-sm">Clear Log</button>
+  </form>
+</div>
+
+<div class="log-box" id="log-box">
+  {% for line in lines %}
+  <div class="log-line {{ line|log_class }}">{{ line|e }}</div>
+  {% endfor %}
+</div>
+{% endblock %}