T-574 优化封面画廊保存反馈

app/gui/tabs/generate.py

@@ -137,8 +137,11 @@ class CoverGalleryDialog(QDialog):
         self.regenerate_button.clicked.connect(self.regenerate_cover)
         button_layout.addWidget(self.regenerate_button)
         button_layout.addStretch(1)
+        self.save_hint_label = QLabel("")
+        self.save_hint_label.setObjectName("coverGallerySaveHintLabel")
+        button_layout.addWidget(self.save_hint_label)
         self.save_button = QPushButton("保存")
-        self.cancel_button = QPushButton("取消")
+        self.cancel_button = QPushButton("关闭")
         self.save_button.clicked.connect(self.save_selection)
         self.cancel_button.clicked.connect(self.reject)
         button_layout.addWidget(self.save_button)
@@ -297,6 +300,8 @@ class CoverGalleryDialog(QDialog):
     def _select_candidate(self, candidate_path):
         self.selected_path = candidate_path
         self.save_button.setEnabled(True)
+        if not _same_file(candidate_path, self.current_path):
+            self._set_save_hint("")
         self._update_status()
 
     def _update_status(self):
@@ -322,14 +327,16 @@ class CoverGalleryDialog(QDialog):
         self.status_label.setText("已选择新的生成封面，保存后用于后续更新蝦皮")
 
     def save_selection(self, checked=False):
-        return self._save_selected_cover(close_on_success=True)
+        return self._save_selected_cover(close_on_success=False, show_success_hint=True)
 
-    def _save_selected_cover(self, close_on_success=False):
+    def _save_selected_cover(self, close_on_success=False, show_success_hint=False):
         if not self.selected_path:
             QMessageBox.warning(self, "封面画廊", "请先选择一张生成封面")
             return False
         if _same_file(self.selected_path, self.current_path):
             self.changed = False
+            if show_success_hint:
+                self._set_save_hint("已保存为本次更新封面")
             if close_on_success:
                 self.accept()
             return True
@@ -338,6 +345,7 @@ class CoverGalleryDialog(QDialog):
         try:
             db.update_generated_cover(self.task.id, self.selected_path, path=self.db_path)
         except Exception as exc:
+            self._set_save_hint("")
             QMessageBox.warning(self, "封面画廊", f"保存当前封面失败：{exc}")
             return False
         fresh_task = db.get_task(self.task.id, path=self.db_path)
@@ -346,13 +354,20 @@ class CoverGalleryDialog(QDialog):
             self.visible_tasks[self.task_index] = fresh_task
         self.current_path = _normalize_file_path(self.selected_path)
         self.changed = True
+        self._rebuild_candidate_items()
+        self._sync_initial_selection()
         self._update_status()
+        if show_success_hint:
+            self._set_save_hint("已保存为本次更新封面")
         if self.gallery_updated_callback is not None:
             self.gallery_updated_callback(self.task)
         if close_on_success:
             self.accept()
         return True
 
+    def _set_save_hint(self, message):
+        self.save_hint_label.setText(str(message or ""))
+
     def regenerate_cover(self, checked=False):
         if self.regenerate_thread is not None:
             return False
@@ -574,6 +589,7 @@ class CoverGalleryDialog(QDialog):
             self.account = self._account_for_task(task)
         self.current_path = _normalize_file_path(getattr(self.task, "new_cover_path", None))
         self.selected_path = None
+        self._set_save_hint("")
         self.candidates = image_paths.list_task_cover_candidates(self.image_root, self.task, account=self.account)
         self._rebuild_candidate_items()
         self._sync_initial_selection()