feat: Add Bookys scraper alongside EBoek with startup mode chooser

Adds a second scraper for bookys-ebooks.com that harvests direct 1fichier
download URLs into a .txt file. The existing EBoek scraper core is unchanged;
only the GUI gained a Mode menu entry to switch between the two.

Bookys specifics:
- Visible (never headless) browser, since the site is behind Cloudflare.
  The challenge is auto-detected: the scraper polls for real listing items
  and continues on its own once it clears, no button needed.
- Persistent Chrome profile in ~/.eboek_scraper/bookys_chrome_profile so the
  Cloudflare clearance cookie survives between runs. Removed the hardcoded
  user-agent override, which claimed Chrome/120 against a real Chrome/150 and
  invalidated that cookie on every launch.
- Pop-up ads are avoided by never clicking host links: hrefs are read and
  navigated to directly, with window.open neutered via CDP as a backstop.
- Host links are read with textContent rather than Selenium's .text, which
  returns empty for these elements because they sit in a collapsed container.
- Only 1fichier hosts are followed; other hosts on a page are ignored.

Build configs list the new modules as hidden imports in all four places.
gui_main imports the Bookys window lazily, so PyInstaller's static analysis
would otherwise miss it and the .exe would crash on switching modes.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NVJc2XuTvqBHSuqotetseS

gui/startup_dialog.py

@@ -0,0 +1,58 @@
+"""
+Startup chooser: pick which site to scrape when the app boots.
+"""
+
+from PyQt5.QtWidgets import (
+    QDialog, QVBoxLayout, QHBoxLayout, QPushButton, QLabel
+)
+from PyQt5.QtCore import Qt
+
+
+class StartupDialog(QDialog):
+    """Small modal shown on boot to choose EBoek or Bookys."""
+
+    EBOEK = "eboek"
+    BOOKYS = "bookys"
+
+    def __init__(self, parent=None):
+        super().__init__(parent)
+        self.choice = None
+        self._init_ui()
+
+    def _init_ui(self):
+        self.setWindowTitle("Choose Scraper")
+        self.setModal(True)
+        self.setMinimumWidth(420)
+
+        layout = QVBoxLayout(self)
+        layout.setSpacing(18)
+        layout.setContentsMargins(28, 28, 28, 28)
+
+        title = QLabel("Which site do you want to scrape?")
+        title.setStyleSheet("font-size: 16px; font-weight: bold;")
+        title.setAlignment(Qt.AlignCenter)
+        layout.addWidget(title)
+
+        subtitle = QLabel("You can switch anytime from the menu bar.")
+        subtitle.setAlignment(Qt.AlignCenter)
+        subtitle.setStyleSheet("color: #666;")
+        layout.addWidget(subtitle)
+
+        buttons = QHBoxLayout()
+        buttons.setSpacing(14)
+
+        eboek_btn = QPushButton("EBoek.info\n\nDownload comic files")
+        eboek_btn.setMinimumHeight(90)
+        eboek_btn.clicked.connect(lambda: self._choose(self.EBOEK))
+        buttons.addWidget(eboek_btn)
+
+        bookys_btn = QPushButton("Bookys\n\nHarvest 1fichier links → .txt")
+        bookys_btn.setMinimumHeight(90)
+        bookys_btn.clicked.connect(lambda: self._choose(self.BOOKYS))
+        buttons.addWidget(bookys_btn)
+
+        layout.addLayout(buttons)
+
+    def _choose(self, choice):
+        self.choice = choice
+        self.accept()