Hook up GUI Install button to backend logic

iridium_installer/ui/window.py

@@ -196,26 +196,97 @@ class InstallerWindow(Adw.ApplicationWindow):
             modules = self.modules_page.get_modules()
             user_info = self.user_page.get_user_info()
 
-            partitions_config = {}
-            if mode == "manual":
-                partitions_config = self.partitioning_page.get_config()
-            elif mode == "automatic":
-                partitions = calculate_auto_partitions(disk)
-                partitions_config = {"partitions": partitions}
-
             if self.mock_mode:
                 print("!!! MOCK MODE ENABLED - NO CHANGES WILL BE MADE !!!")
                 print(f"Target Disk: {disk}")
                 print(f"Mode: {mode}")
                 print(f"Modules: {modules}")
                 print(f"User: {user_info}")
-                print(f"Partition Config: {partitions_config}")
                 print("Simulation complete.")
+                # Show success in UI even in mock
+                self.show_finish_page("Mock Installation Complete!")
             else:
-                print("NOT IMPLEMENTED")
+                from ..backend.disk import auto_partition_disk, mount_partitions
+                from ..backend.os_install import install_minimal_os, configure_system
+                
+                # Simple progress UI transition
+                self.show_progress_page("Installing Iridium OS...")
+                
+                # We should really run this in a thread to keep UI responsive, 
+                # but for "barely bootable" requirement and simplicity:
+                try:
+                    # Step 1: Partitioning
+                    print("Step 1: Partitioning...")
+                    parts = auto_partition_disk(disk)
+                    
+                    # Step 2: Mounting
+                    print("Step 2: Mounting...")
+                    mount_root = "/mnt"
+                    mount_partitions(parts, mount_root)
+                    
+                    # Step 3: OS Installation
+                    print("Step 3: OS Installation...")
+                    install_minimal_os(mount_root)
+                    
+                    # Step 4: Configure
+                    print("Step 4: Configuration...")
+                    configure_system(mount_root, parts)
+                    
+                    self.show_finish_page("Installation Successful!")
+                except Exception as e:
+                    print(f"Installation failed: {e}")
+                    self.show_finish_page(f"Installation Failed: {e}", success=False)
 
             return
 
+    def show_progress_page(self, message):
+        prog_page = Adw.StatusPage()
+        prog_page.set_title(message)
+        prog_page.set_description("Please wait while we set up your system.")
+        
+        spinner = Gtk.Spinner()
+        spinner.set_size_request(32, 32)
+        spinner.set_halign(Gtk.Align.CENTER)
+        spinner.start()
+        
+        box = Gtk.Box(orientation=Gtk.Orientation.VERTICAL, spacing=12)
+        box.append(spinner)
+        prog_page.set_child(box)
+        
+        name = "progress_install"
+        self.stack.add_named(prog_page, name)
+        self.stack.set_visible_child_name(name)
+        
+        # Hide navigation buttons during install
+        self.bottom_bar.set_visible(False)
+
+    def show_finish_page(self, message, success=True):
+        finish_page = Adw.StatusPage()
+        finish_page.set_title(message)
+        if success:
+            finish_page.set_icon_name("emblem-ok-symbolic")
+            finish_page.set_description("You can now restart your computer.")
+            btn_label = "Restart"
+        else:
+            finish_page.set_icon_name("dialog-error-symbolic")
+            finish_page.set_description("An error occurred during installation.")
+            btn_label = "Close"
+            
+        btn = Gtk.Button(label=btn_label)
+        btn.set_halign(Gtk.Align.CENTER)
+        btn.add_css_class("suggested-action")
+        btn.connect("clicked", lambda b: self.close())
+        
+        finish_page.set_child(btn)
+        
+        name = "finish_install"
+        self.stack.add_named(finish_page, name)
+        self.stack.set_visible_child_name(name)
+        
+        # Make bottom bar visible but maybe just with a close button if we didn't have the child btn
+        # self.bottom_bar.set_visible(True)
+        # self.next_button.set_label("Finish")
+
         if next_index < len(self.page_ids):
             self.current_page_index = next_index
             self.stack.set_visible_child_name(self.page_ids[self.current_page_index])