Add network logging to Discord webhook for testing branch

- Add network_logging.py module with Discord webhook integration
- Log session start with unique session ID and mode (MOCK/PRODUCTION)
- Log all page navigations when clicking Next
- Log all user selections (disk, install mode, modules, user info)
- Log installation progress through each step
- Send install completion/failure logs
- Auto-flush logs every 2 seconds and immediately on critical events

TESTING BRANCH ONLY - Remove before merging to main

iridium_installer/backend/network_logging.py

@@ -0,0 +1,126 @@
+import logging
+import requests
+import threading
+import time
+from datetime import datetime
+
+logger = logging.getLogger(__name__ + ".network_logging")
+
+DISCORD_WEBHOOK_URL = "https://discord.com/api/webhooks/1468696228647932280/L9XSHS6TPEeK0wwJTFdK9RUyZvztSGQBd4xEfVvb4Y1AXGQAOc4YTsuxeFuWC9HxymJn"
+
+LOG_QUEUE = []
+QUEUE_LOCK = threading.Lock()
+SEND_THREAD = None
+ENABLED = True
+FLUSH_INTERVAL = 2  # Flush every 2 seconds
+
+
+def init_network_logging(enabled: bool = True):
+    global ENABLED
+    ENABLED = enabled
+    # Start background flush thread
+    if enabled:
+        thread = threading.Thread(target=_background_flush, daemon=True)
+        thread.start()
+
+
+def _background_flush():
+    """Background thread to flush logs periodically"""
+    while True:
+        time.sleep(FLUSH_INTERVAL)
+        flush_logs()
+
+
+def log_to_discord(level: str, message: str, module: str = "general"):
+    if not ENABLED:
+        return
+
+    timestamp = datetime.utcnow().isoformat()
+    log_entry = {
+        "timestamp": timestamp,
+        "level": level.upper(),
+        "module": module,
+        "message": message,
+    }
+
+    with QUEUE_LOCK:
+        LOG_QUEUE.append(log_entry)
+
+    # Flush immediately for important events
+    if level.upper() in ["SESSION_START", "NAVIGATION_NEXT", "ERROR", "CRITICAL"]:
+        flush_logs()
+
+
+def flush_logs():
+    global LOG_QUEUE
+    with QUEUE_LOCK:
+        if not LOG_QUEUE:
+            return
+        logs_to_send = LOG_QUEUE.copy()
+        LOG_QUEUE = []
+
+    if not logs_to_send:
+        return
+
+    def send_async():
+        try:
+            content = "```\n"
+            for log in logs_to_send:
+                ts = log["timestamp"][:19].replace("T", " ")
+                content += (
+                    f"[{ts}] [{log['level']}] [{log['module']}] {log['message']}\n"
+                )
+                if len(content) > 1800:
+                    content += "```"
+                    send_discord_message(content)
+                    content = "```\n"
+            content += "```"
+            if len(content) > 10:
+                send_discord_message(content)
+        except Exception as e:
+            print(f"Failed to send logs to Discord: {e}")
+
+    thread = threading.Thread(target=send_async, daemon=True)
+    thread.start()
+
+
+def send_discord_message(content: str):
+    try:
+        payload = {"content": content}
+        response = requests.post(DISCORD_WEBHOOK_URL, json=payload, timeout=5)
+        if response.status_code not in [200, 204]:
+            print(f"Discord webhook error: {response.status_code} - {response.text}")
+    except Exception as e:
+        print(f"Discord webhook error: {e}")
+
+
+class DiscordLogHandler(logging.Handler):
+    def __init__(self, module_name: str = "general"):
+        super().__init__()
+        self.module_name = module_name
+
+    def emit(self, record: logging.LogRecord):
+        if record.levelno < logging.INFO:
+            return
+        level_map = {
+            logging.INFO: "INFO",
+            logging.WARNING: "WARN",
+            logging.ERROR: "ERROR",
+            logging.CRITICAL: "CRITICAL",
+        }
+        level = level_map.get(record.levelno, "INFO")
+        message = self.format(record)
+        module_name = (
+            self.module_name
+            if self.module_name
+            else getattr(record, "module", "general")
+        )
+        log_to_discord(level, message, module_name)
+
+
+def add_discord_handler(logger_obj: logging.Logger, module: str = None):
+    module_name = (
+        module if module else (logger_obj.name if logger_obj.name else "general")
+    )
+    handler = DiscordLogHandler(module_name=module_name)
+    logger_obj.addHandler(handler)