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/config_manager.py

@@ -0,0 +1,68 @@
+import json
+import logging
+import os
+import signal
+import socket
+import sys
+
+logger = logging.getLogger(__name__)
+
+CONFIG_PATH = "config/config.json"
+PID_PATH = "data/ircbot.pid"
+SOCK_PATH = "data/ircbot.sock"
+
+
+def load_config() -> dict:
+    if not os.path.exists(CONFIG_PATH):
+        return {}
+    with open(CONFIG_PATH, "r") as f:
+        return json.load(f)
+
+
+def save_config(cfg: dict) -> None:
+    os.makedirs("config", exist_ok=True)
+    with open(CONFIG_PATH, "w") as f:
+        json.dump(cfg, f, indent=2)
+    logger.info("[CONFIG] Saved config.json")
+
+
+def signal_bot_reload() -> bool:
+    """Signal bot to reload config. Returns True on success."""
+    # Try Unix socket first (Docker mode)
+    if sys.platform != "win32" and os.path.exists(SOCK_PATH):
+        try:
+            s = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
+            s.connect(SOCK_PATH)
+            s.sendall(b"RELOAD")
+            s.close()
+            logger.info("[CONFIG] Sent RELOAD via Unix socket")
+            return True
+        except Exception as e:
+            logger.warning(f"[CONFIG] Socket reload failed: {e}")
+
+    # Fall back to SIGHUP
+    if sys.platform != "win32" and os.path.exists(PID_PATH):
+        try:
+            with open(PID_PATH) as f:
+                pid = int(f.read().strip())
+            os.kill(pid, signal.SIGHUP)
+            logger.info(f"[CONFIG] Sent SIGHUP to PID {pid}")
+            return True
+        except Exception as e:
+            logger.warning(f"[CONFIG] SIGHUP failed: {e}")
+
+    logger.warning("[CONFIG] Could not signal bot (no socket or PID available)")
+    return False
+
+
+def signal_bot_reconnect() -> bool:
+    if sys.platform != "win32" and os.path.exists(SOCK_PATH):
+        try:
+            s = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
+            s.connect(SOCK_PATH)
+            s.sendall(b"RECONNECT")
+            s.close()
+            return True
+        except Exception as e:
+            logger.warning(f"[CONFIG] Reconnect signal failed: {e}")
+    return False