🐛 fix: fix: verificação md5 em background e atalho ORCA no pré-Calamares

- Adiciona modo --no-gui ao biglinux-verify-md5sum para verificação
  silenciosa de integridade (sem abrir janela GTK)
- Altera services.py para chamar biglinux-verify-md5sum --no-gui,
  evitando que a janela "Checking system integrity" apareça durante
  a seleção de idioma no wizard
- Adiciona EventControllerKey na janela do pré-Calamares para capturar
  Super+Alt+S e iniciar o ORCA (mesmo mecanismo do wizard, que funciona
  corretamente em ambientes com compositor completo como GNOME Shell)
- Adiciona descrição acessível na janela do pré-Calamares informando
  o atalho Super+Alt+S para ativar o leitor de tela
- Remove código residual de preferences no handler on_start_orca_action

Author: talesam

biglinux-livecd/usr/bin/biglinux-verify-md5sum

@@ -367,6 +367,44 @@ class VerifyApp(Adw.Application):
         )
 
 
+def verify_headless() -> int:
+    """Run verification without GUI. Returns 0 on success, 1 on failure."""
+    try:
+        os.remove(FAIL_FLAG)
+    except FileNotFoundError:
+        pass
+
+    mount_dir = detect_iso_mount()
+    if not mount_dir:
+        return 1
+
+    original_dir = os.getcwd()
+    try:
+        os.chdir(mount_dir)
+    except OSError:
+        return 1
+
+    for md5_file, sfs_name, _pct in SQUASHFS_FILES:
+        if not os.path.exists(md5_file):
+            continue
+        if not verify_md5_file(md5_file):
+            os.chdir(original_dir)
+            try:
+                with open(FAIL_FLAG, "w") as f:
+                    f.write("1")
+            except OSError:
+                pass
+            return 1
+
+    os.chdir(original_dir)
+    try:
+        with open(VERIFIED_FLAG, "w") as f:
+            f.write("1")
+    except OSError:
+        pass
+    return 0
+
+
 def main():
     signal.signal(signal.SIGINT, lambda *_: sys.exit(1))
 
@@ -388,6 +426,10 @@ def main():
     if os.path.exists(VERIFIED_FLAG):
         sys.exit(0)
 
+    # Headless mode: run verification without GUI
+    if "--no-gui" in sys.argv:
+        sys.exit(verify_headless())
+
     Adw.init()
     app = VerifyApp()
     sys.exit(app.run([]))

biglinux-livecd/usr/share/biglinux/calamares/src/app.py

@@ -142,12 +142,6 @@ def on_start_orca_action(self, action, param):
         """Start ORCA screen reader via Super+Alt+S."""
         self.logger.info("Starting ORCA screen reader")
         start_orca()
-        self.logger.info("Preferences action triggered")
-
-        # Create a simple toast notification for now
-        if self.window:
-            toast = Adw.Toast(title=_("Preferences not implemented yet"), timeout=3)
-            self.window.show_toast(toast)
 
     def show_error_dialog(self, title, message, details=None):
         """Show error dialog to user"""

biglinux-livecd/usr/share/biglinux/calamares/src/window.py

@@ -12,10 +12,10 @@
 gi.require_version('Gtk', '4.0')
 gi.require_version('Adw', '1')
 
-from gi.repository import Gtk, Adw
+from gi.repository import Gtk, Adw, Gdk
 from .utils.i18n import _
 from .utils.constants import DEFAULTS
-from .utils.accessibility import announce, set_label, set_description
+from .utils.accessibility import announce, set_label, set_description, start_orca
 from .pages import MainPage, MaintenancePage, MinimalPage, TipsPage
 
 
@@ -55,8 +55,24 @@ def __init__(self, **kwargs):
         self.create_pages()
         self.setup_navigation()
 
+        # KeyboardEventController for Super+Alt+S to start ORCA
+        key_controller = Gtk.EventControllerKey.new()
+        key_controller.connect("key-pressed", self._on_key_press_event)
+        self.add_controller(key_controller)
+
         self.logger.info("Main window initialized")
 
+    def _on_key_press_event(self, controller, keyval, keycode, state):
+        """Handle global key events — Super+Alt+S starts ORCA screen reader."""
+        if (
+            keyval == Gdk.KEY_s
+            and state & Gdk.ModifierType.SUPER_MASK
+            and state & Gdk.ModifierType.ALT_MASK
+        ):
+            start_orca()
+            return True
+        return False
+
     def setup_window(self):
         """Configure window properties."""
         title = _("{distro} Installation").format(distro=self.distro_name)
@@ -70,6 +86,10 @@ def setup_window(self):
 
         # Accessible label for the window
         set_label(self, title)
+        set_description(
+            self,
+            title + " — " + _("press Super+Alt+S to start the screen reader"),
+        )
 
     def create_layout(self):
         """Create the main window layout using Adw.ToolbarView."""

biglinux-livecd/usr/share/biglinux/livecd/services.py

@@ -133,7 +133,9 @@ def apply_language_settings(self, lang_code: str, timezone: str):
         self._run_command(
             ["localectl", "set-locale", f"LANG={lang_code}.UTF-8"], as_root=True
         )
-        self._run_command(["/usr/bin/biglinux-verify-md5sum"], as_root=False)
+        self._run_command(
+            ["/usr/bin/biglinux-verify-md5sum", "--no-gui"], as_root=False
+        )
 
     def apply_keyboard_layout(self, layout: str):
         """Applies the selected keyboard layout."""