feat: implement queue panel with table, batch modes, stats, and export

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/app/main_window.py

@@ -17,6 +17,7 @@ from version import APP_NAME, APP_VERSION
 from app.widgets.export_panel import ExportPanel
 from app.widgets.image_canvas import ImageCanvas
 from app.widgets.image_list_panel import ImageListPanel
+from app.widgets.queue_panel import QueuePanel
 from app.widgets.template_panel import TemplatePanel
 from app.widgets.transform_panel import TransformPanel
 
@@ -59,6 +60,7 @@ class MainWindow(QMainWindow):
 
         self.setCentralWidget(root)
         self._apply_stylesheet()
+        self._connect_signals()
 
     def _create_header(self):
         """Top header: app name, version label, settings button."""
@@ -210,12 +212,11 @@ class MainWindow(QMainWindow):
         self._queue_body.setObjectName("queueBody")
 
         body_layout = QVBoxLayout(self._queue_body)
-        body_layout.setContentsMargins(12, 8, 12, 8)
+        body_layout.setContentsMargins(0, 0, 0, 0)
+        body_layout.setSpacing(0)
 
-        placeholder = QLabel("合成队列（实现中）")
-        placeholder.setAlignment(Qt.AlignCenter)
-        placeholder.setObjectName("queuePlaceholder")
-        body_layout.addWidget(placeholder)
+        self.queue_panel = QueuePanel()
+        body_layout.addWidget(self.queue_panel)
 
         self._queue_expanded = True
         return self._queue_body
@@ -240,6 +241,26 @@ class MainWindow(QMainWindow):
             self._queue_container.setFixedHeight(36)
             self._collapse_btn.setText("▼")
 
+    # ------------------------------------------------------------------
+    # Signal wiring
+    # ------------------------------------------------------------------
+
+    def _connect_signals(self):
+        """Connect inter-panel signals needed for the queue workflow."""
+        # Asset lists → queue rebuilds automatically
+        self.image_list_panel.garments_changed.connect(self.queue_panel.set_garments)
+        self.image_list_panel.prints_changed.connect(self.queue_panel.set_prints)
+        # Queue row selection → preview canvas
+        self.queue_panel.item_activated.connect(self._on_queue_item_activated)
+
+    def _on_queue_item_activated(self, item):
+        """Load garment and print from a selected queue item into the canvas."""
+        self.image_canvas.load_garment(str(item.garment.path))
+        self.image_canvas.load_print(str(item.print_asset.path))
+        if item.transform:
+            self.image_canvas.set_transform(item.transform)
+            self.transform_panel.set_transform(item.transform)
+
     # ------------------------------------------------------------------
     # Style  (ref: docs/07-ui-design.md §10)
     # ------------------------------------------------------------------