feat(ai): generate covers without new titles

app/gui/models.py

@@ -2,7 +2,7 @@
 
 from __future__ import annotations
 
-from .. import diagnostics
+from .. import ai, appconfig, diagnostics
 from ..collect_skip import skipped_stage_text
 from .widgets import *
 
@@ -190,10 +190,15 @@ class GenerateTaskTableModel(QAbstractTableModel):
         self.db_path = db_path
         self.status_callback = status_callback
         self.last_edit_error = None
+        self.generate_mode = "title"
         self.generate_cover_enabled = False
 
     def set_generate_cover_enabled(self, enabled):
-        self.generate_cover_enabled = bool(enabled)
+        self.set_generate_mode("title_cover" if enabled else "title")
+
+    def set_generate_mode(self, mode):
+        self.generate_mode = appconfig.normalize_generate_mode(mode)
+        self.generate_cover_enabled = appconfig.generate_mode_includes_cover(self.generate_mode)
         if not self.tasks:
             return
         top_left = self.index(0, 4)
@@ -403,7 +408,10 @@ class GenerateTaskTableModel(QAbstractTableModel):
             return "失败"
         if not self.generate_cover_enabled:
             return "未启用"
-        if self._is_title_failure(task) or not self._has_new_title(task):
+        if self.generate_mode == "cover":
+            if not ai.cover_title_context(task):
+                return "未开始"
+        elif self._is_title_failure(task) or not self._has_new_title(task):
             return "未开始"
         if getattr(task, "status", None) == "running":
             return "处理中"

app/gui/tabs/generate.py

@@ -945,7 +945,7 @@ class GenerateTab(QWidget):
             self.empty_state_button.clicked.connect(self.open_accounts_callback)
         self.task_table = QTableView()
         self.model = GenerateTaskTableModel(self.task_table, db_path=self.db_path, status_callback=self._set_status)
-        self.model.set_generate_cover_enabled(self._current_generate_mode_includes_cover())
+        self.model.set_generate_mode(self._current_generate_mode())
         self.task_table.setModel(self.model)
         self.task_table.setSelectionBehavior(QAbstractItemView.SelectRows)
         self.task_table.setSelectionMode(QAbstractItemView.ExtendedSelection)
@@ -1159,13 +1159,13 @@ class GenerateTab(QWidget):
         previous = appconfig.ai_generate_mode(self.config)
         current = self._current_generate_mode()
         if self._save_generate_mode_setting(show_status=True):
-            self.model.set_generate_cover_enabled(appconfig.generate_mode_includes_cover(current))
+            self.model.set_generate_mode(current)
             self.refresh_tasks()
             return
         self.generate_mode_combo.blockSignals(True)
         self._set_combo_by_data(self.generate_mode_combo, previous)
         self.generate_mode_combo.blockSignals(False)
-        self.model.set_generate_cover_enabled(appconfig.generate_mode_includes_cover(previous))
+        self.model.set_generate_mode(previous)
 
     def _apply_task_table_column_widths(self):
         if self.model.columnCount() != len(self.TABLE_COLUMN_WEIGHTS):
@@ -1524,7 +1524,7 @@ class GenerateTab(QWidget):
         ]
         if not tasks:
             if generate_mode == "cover":
-                self._set_status("当前筛选结果没有可生成封面的任务，请先生成标题。")
+                self._set_status("当前筛选结果没有可生成的封面；请确认商品已完成采集且尚未生成新封面。")
             else:
                 self._set_status("当前筛选结果没有可生成的缺失内容；请先在①导入采集完成采集，或调整生成内容")
             return
@@ -2081,9 +2081,12 @@ class GenerateTab(QWidget):
         return None
 
     def _prompt_context(self, task):
+        new_title = task.new_title
+        if self._current_generate_mode() == "cover":
+            new_title = ai.cover_title_context(task)
         return {
             "old_title": task.old_title,
-            "new_title": task.new_title,
+            "new_title": new_title,
             "item_id": task.item_id,
             "account_name": self.model.account_name_for(task),
             "alias": task.alias,
@@ -2133,7 +2136,7 @@ class GenerateTab(QWidget):
             _set_empty_state(self.empty_state_card, self.empty_state_label, self.empty_state_button)
             self._set_status(f"AI 生成任务读取失败：{exc}")
             return
-        self.model.set_generate_cover_enabled(self._current_generate_mode_includes_cover())
+        self.model.set_generate_mode(self._current_generate_mode())
         self.model.set_tasks(filtered_tasks, accounts_rows)
         self._apply_task_table_column_widths()
         self.summary_label.setText(

app/gui/workers.py

@@ -593,6 +593,8 @@ class GenerateWorker(BaseWorker):
             if result == "start" and step == "title_submit":
                 return f"[标题] {self._task_progress_label(task)} 开始生成"
             if result == "skipped":
+                if detail and "旧标题作为封面参考" in detail:
+                    return f"[图片] {self._task_progress_label(task)} {detail}"
                 return f"[标题] {self._task_progress_label(task)} 已有标题，跳过生文"
             if result == "success" and step == "title_done":
                 return f"[标题] {self._task_progress_label(task)} 成功"