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/memory.html

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+{% extends "base.html" %}
+{% block title %}Memory — IRC Bot Portal{% endblock %}
+{% block content %}
+<h1>Conversation Memory</h1>
+
+<div class="cards">
+  <div class="card">
+    <div class="card-label">Total Exchanges</div>
+    <div class="card-value">{{ stats.total_exchanges }}</div>
+  </div>
+  <div class="card">
+    <div class="card-label">Database Size</div>
+    <div class="card-value">{{ (stats.total_size_bytes / 1024)|round(1) }} KB</div>
+  </div>
+</div>
+
+<div class="section">
+  <h2>Browse History</h2>
+  <form method="get" class="inline-form">
+    <select name="channel" onchange="this.form.submit()">
+      <option value="">— Select channel —</option>
+      {% for ch in channels %}
+      <option value="{{ ch }}" {% if ch == selected_chan %}selected{% endif %}>{{ ch }}</option>
+      {% endfor %}
+    </select>
+    {% if selected_chan %}
+    <select name="nick" onchange="this.form.submit()">
+      <option value="">— Select nick —</option>
+      {% for n in nicks %}
+      <option value="{{ n }}" {% if n == selected_nick %}selected{% endif %}>{{ n }}</option>
+      {% endfor %}
+    </select>
+    {% endif %}
+  </form>
+
+  {% if selected_chan and selected_nick and exchanges %}
+  <div class="exchange-list">
+    {% for ex in exchanges %}
+    <div class="exchange">
+      <div class="exchange-meta">{{ ex.timestamp }}</div>
+      <div class="exchange-user"><strong>{{ selected_nick }}:</strong> {{ ex.user }}</div>
+      <div class="exchange-bot"><strong>bot:</strong> {{ ex.assistant }}</div>
+    </div>
+    {% endfor %}
+  </div>
+  {% elif selected_chan and selected_nick %}
+  <p class="muted">No exchanges found.</p>
+  {% endif %}
+</div>
+
+<div class="section">
+  <h2>Clear History</h2>
+  <div class="actions">
+    {% if selected_chan and selected_nick %}
+    <form method="post" action="{{ url_for('memory_clear_user') }}">
+      <input type="hidden" name="channel_dir" value="{{ selected_chan }}">
+      <input type="hidden" name="nick" value="{{ selected_nick }}">
+      <button class="btn btn-danger">Clear {{ selected_nick }}'s history in {{ selected_chan }}</button>
+    </form>
+    {% endif %}
+    {% if selected_chan %}
+    <form method="post" action="{{ url_for('memory_clear_channel') }}">
+      <input type="hidden" name="channel_dir" value="{{ selected_chan }}">
+      <button class="btn btn-danger">Clear all history in {{ selected_chan }}</button>
+    </form>
+    {% endif %}
+    <form method="post" action="{{ url_for('memory_clear_all') }}" onsubmit="return confirm('Wipe ALL conversation history? This cannot be undone.')">
+      <input type="hidden" name="confirm" value="yes">
+      <button class="btn btn-danger">Clear ALL History</button>
+    </form>
+  </div>
+</div>
+{% endblock %}