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/channels.html

@@ -0,0 +1,39 @@
+{% extends "base.html" %}
+{% block title %}Channels — IRC Bot Portal{% endblock %}
+{% block content %}
+<h1>Channel Management</h1>
+
+<div class="section">
+  <h2>Add Channel</h2>
+  <form method="post" action="{{ url_for('channel_add') }}" class="inline-form">
+    <input type="text" name="channel" placeholder="#general" required>
+    <button class="btn btn-primary">Join & Save</button>
+  </form>
+</div>
+
+<div class="section">
+  <h2>Joined Channels</h2>
+  {% if cfg.get('channels') %}
+  <table class="data-table">
+    <thead>
+      <tr><th>Channel</th><th>Action</th></tr>
+    </thead>
+    <tbody>
+      {% for ch in cfg['channels'] %}
+      <tr>
+        <td>{{ ch }}</td>
+        <td>
+          <form method="post" action="{{ url_for('channel_remove') }}" style="display:inline">
+            <input type="hidden" name="channel" value="{{ ch }}">
+            <button class="btn btn-danger btn-sm">Part</button>
+          </form>
+        </td>
+      </tr>
+      {% endfor %}
+    </tbody>
+  </table>
+  {% else %}
+  <p class="muted">No channels configured.</p>
+  {% endif %}
+</div>
+{% endblock %}