Port v3.1 scheduling + OS autostart onto multi_account

- Adopt main's headless CLI runner (AutoRewarder_CLI.py) and OS autostart
  (HKCU Run on Windows, .desktop on Linux), dropping the in-process daemon
  scheduler and the standalone windows_startup module.
- Per-account schedule schema: advancedScheduling, runDuration,
  queriesPerHour, queries_pc, queries_mobile. Legacy keys
  (time/window_hours/queries) are ignored on read.
- Settings modal: accordion schedule cards (one expanded at a time) with
  live inline summary; advancedScheduling sub-toggle gates the duration
  and rate fields.
- settings_manager: atomic write retries on transient Windows
  PermissionError; read paths tolerate recovery-write failures.
- Bump CURRENT_VERSION to v3.1 and the brand sub-header to match.

Keeps multi-account architecture, redesigned UI, PC/Mobile run split
and per-account schedules from multi_account.

Author: JeromeM

AutoRewarder.py

@@ -1,31 +1,59 @@
-"""
-Main entry point for the AutoRewarder application.
-
-This script initializes the core AutoRewarderAPI and launches the desktop
-graphical user interface (GUI) using pywebview.
-
-Usage:
-    Run this file directly to start the application:
-    python AutoRewarder.py
-"""
-
-import os
-import webview
-
-from src.api import AutoRewarderAPI
-from src.config import GUI_DIR, ASSETS_DIR
-
-# Entry point of the application
-if __name__ == "__main__":
-    api = AutoRewarderAPI()
-    window = webview.create_window(
-        title="AutoRewarder",
-        url=os.path.join(GUI_DIR, "index.html"),
-        js_api=api,
-        width=640,
-        height=680,
-        resizable=False,
-        background_color="#0b0d12",
-    )
-    api.set_window(window)  # pass window reference to AutoRewarderAPI for logging
-    webview.start(icon=os.path.join(ASSETS_DIR, "icon.ico"))
+"""
+Main entry point for the AutoRewarder application.
+
+By default this script launches the desktop GUI (pywebview). When invoked
+with the `--headless` flag — typically by the OS-level autostart entry
+that the "Start with Windows/Linux" toggle installs — it delegates to
+`AutoRewarder_CLI.main()`, which drives scheduled runs for every enabled
+account without bringing up a window.
+
+Usage:
+    # GUI:
+    python AutoRewarder.py
+
+    # Headless / scheduled:
+    python AutoRewarder.py --headless [--account <id-or-label>]
+"""
+
+import argparse
+import os
+import sys
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(add_help=False)
+    parser.add_argument(
+        "--headless", action="store_true", help="Run in headless/background mode"
+    )
+    args, _ = parser.parse_known_args()
+
+    # Delegate to the CLI runner when --headless is set. Any remaining args
+    # (e.g., --account, --pc, --mobile) stay in sys.argv so the CLI parser
+    # can consume them.
+    if args.headless:
+        if "--headless" in sys.argv:
+            sys.argv.remove("--headless")
+
+        from AutoRewarder_CLI import main as headless_main
+
+        headless_main()
+        sys.exit(0)
+
+    # GUI path — import webview + the API lazily so the headless path doesn't
+    # pay for the pywebview import cost.
+    import webview
+
+    from src.api import AutoRewarderAPI
+    from src.config import GUI_DIR, ASSETS_DIR
+
+    api = AutoRewarderAPI()
+    window = webview.create_window(
+        title="AutoRewarder",
+        url=os.path.join(GUI_DIR, "index.html"),
+        js_api=api,
+        width=640,
+        height=680,
+        resizable=False,
+        background_color="#0b0d12",
+    )
+    api.set_window(window)  # pass window reference to AutoRewarderAPI for logging
+    webview.start(icon=os.path.join(ASSETS_DIR, "icon.ico"))