feat: add first-run empty state guidance

app/gui.py

@@ -165,6 +165,35 @@ if QT_IMPORT_ERROR is None:
         return QIcon(pixmap)
 
 
+    def _build_empty_state_card(object_name, button_text="前往账号管理"):
+        card = QWidget()
+        card.setObjectName(object_name)
+        card.setStyleSheet(
+            f"QWidget#{object_name} {{ "
+            "background: #f6f8fa; border: 1px solid #d0d7de; "
+            "border-radius: 6px; padding: 10px; "
+            "}"
+        )
+        layout = QHBoxLayout(card)
+        layout.setContentsMargins(12, 10, 12, 10)
+        label = QLabel("")
+        label.setWordWrap(True)
+        button = QPushButton(button_text)
+        button.setObjectName(f"{object_name}Button")
+        button.setVisible(False)
+        layout.addWidget(label, 1)
+        layout.addWidget(button)
+        card.setVisible(False)
+        return card, label, button
+
+
+    def _set_empty_state(card, label, button, message=None, show_button=False):
+        active = bool(message)
+        card.setVisible(active)
+        label.setText(message or "")
+        button.setVisible(active and show_button)
+
+
     def _database_path(db_path=None, config=None) -> str:
         return db_path or appconfig.db_path(config)
 
@@ -696,11 +725,13 @@ if QT_IMPORT_ERROR is None:
             status_callback=None,
             title_prompt_path=None,
             cover_prompts_dir=None,
+            open_accounts_callback=None,
         ):
             super().__init__(parent)
             self.config = appconfig.load_config() if config is None else config
             self.db_path = _database_path(db_path, self.config)
             self.status_callback = status_callback
+            self.open_accounts_callback = open_accounts_callback
             self.title_prompt_path = title_prompt_path or prompts.TITLE_PROMPT_PATH
             self.cover_prompts_dir = cover_prompts_dir or prompts.COVER_PROMPTS_DIR
             self.current_cover_template = None
@@ -779,6 +810,13 @@ if QT_IMPORT_ERROR is None:
             filter_layout.addWidget(self.refresh_button)
 
             self.summary_label = QLabel("任务 0 条")
+            (
+                self.empty_state_card,
+                self.empty_state_label,
+                self.empty_state_button,
+            ) = _build_empty_state_card("generateEmptyStateCard")
+            if self.open_accounts_callback is not None:
+                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.task_table.setModel(self.model)
@@ -799,6 +837,7 @@ if QT_IMPORT_ERROR is None:
             right_layout.setContentsMargins(12, 0, 0, 0)
             right_layout.addLayout(filter_layout)
             right_layout.addWidget(self.summary_label)
+            right_layout.addWidget(self.empty_state_card)
             right_layout.addWidget(self.task_table, 1)
             right_layout.addWidget(QLabel("AI生成运行日志"))
             right_layout.addWidget(self.run_log_view)
@@ -1271,12 +1310,42 @@ if QT_IMPORT_ERROR is None:
             except Exception as exc:
                 self.model.set_tasks([], [])
                 self.summary_label.setText("任务读取失败")
+                _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_tasks(filtered_tasks, accounts_rows)
             self.summary_label.setText(
                 f"任务 {len(filtered_tasks)}/{len(batch_tasks)} 条"
             )
+            self._update_empty_state(batch_tasks, filtered_tasks, accounts_rows)
+
+        def _update_empty_state(self, batch_tasks, filtered_tasks, account_rows):
+            if not account_rows:
+                _set_empty_state(
+                    self.empty_state_card,
+                    self.empty_state_label,
+                    self.empty_state_button,
+                    "第一步：前往『④账号管理』配置并登录账号，再回到②生成标题和封面。",
+                    self.open_accounts_callback is not None,
+                )
+                return
+            if not batch_tasks:
+                _set_empty_state(
+                    self.empty_state_card,
+                    self.empty_state_label,
+                    self.empty_state_button,
+                    "还没有可生成任务。请先在①导入采集完成旧标题和旧封面采集。",
+                )
+                return
+            if not filtered_tasks:
+                _set_empty_state(
+                    self.empty_state_card,
+                    self.empty_state_label,
+                    self.empty_state_button,
+                    "当前筛选没有匹配的生成任务，请调整批次、店铺、商品ID或状态筛选。",
+                )
+                return
+            _set_empty_state(self.empty_state_card, self.empty_state_label, self.empty_state_button)
 
         def _populate_batch_filter(self, batches, selected_batch):
             previous = selected_batch if selected_batch in {batch.id for batch in batches} else None
@@ -1403,6 +1472,13 @@ if QT_IMPORT_ERROR is None:
 
             self.summary_label = QLabel("任务 0 条")
             self.risk_label = QLabel("可先点击「检查本轮更新」确认当前筛选范围；点击「开始更新」后会再次确认并按批提交线上。")
+            (
+                self.empty_state_card,
+                self.empty_state_label,
+                self.empty_state_button,
+            ) = _build_empty_state_card("applyEmptyStateCard")
+            if self.open_accounts_callback is not None:
+                self.empty_state_button.clicked.connect(self.open_accounts_callback)
             self.task_table = QTableView()
             self.model = ApplyTaskTableModel(self.task_table)
             self.task_table.setModel(self.model)
@@ -1449,6 +1525,7 @@ if QT_IMPORT_ERROR is None:
             layout.addLayout(filter_layout)
             layout.addWidget(self.risk_label)
             layout.addWidget(self.summary_label)
+            layout.addWidget(self.empty_state_card)
             layout.addWidget(self.task_table, 1)
             layout.addWidget(QLabel("运行日志"))
             layout.addWidget(self.run_log_view)
@@ -1499,14 +1576,44 @@ if QT_IMPORT_ERROR is None:
             except Exception as exc:
                 self.model.set_tasks([], [])
                 self.summary_label.setText("任务读取失败")
+                _set_empty_state(self.empty_state_card, self.empty_state_label, self.empty_state_button)
                 self._set_status(f"更新任务读取失败：{exc}")
                 return
             self.model.set_tasks(filtered_tasks, account_rows)
             self.summary_label.setText(
                 f"任务 {len(filtered_tasks)}/{len(batch_tasks)} 条"
             )
+            self._update_empty_state(batch_tasks, filtered_tasks, account_rows)
             self._update_write_back_button()
 
+        def _update_empty_state(self, batch_tasks, filtered_tasks, account_rows):
+            if not account_rows:
+                _set_empty_state(
+                    self.empty_state_card,
+                    self.empty_state_label,
+                    self.empty_state_button,
+                    "第一步：前往『④账号管理』配置并登录账号，再回到③更新 Shopee。",
+                    self.open_accounts_callback is not None,
+                )
+                return
+            if not batch_tasks:
+                _set_empty_state(
+                    self.empty_state_card,
+                    self.empty_state_label,
+                    self.empty_state_button,
+                    "还没有可更新任务。请先在②AI生成完成新标题或新封面。",
+                )
+                return
+            if not filtered_tasks:
+                _set_empty_state(
+                    self.empty_state_card,
+                    self.empty_state_label,
+                    self.empty_state_button,
+                    "当前筛选没有可更新任务，请调整批次、店铺、商品ID或状态筛选。",
+                )
+                return
+            _set_empty_state(self.empty_state_card, self.empty_state_label, self.empty_state_button)
+
         def start_update(self, checked=False):
             self._start_update(dry_run=False)
 
@@ -2184,12 +2291,20 @@ if QT_IMPORT_ERROR is None:
             self.run_log_view.setPlaceholderText("采集运行日志")
 
             self.empty_label = QLabel("")
+            (
+                self.empty_state_card,
+                self.empty_state_label,
+                self.empty_state_button,
+            ) = _build_empty_state_card("collectEmptyStateCard")
+            if self.open_accounts_callback is not None:
+                self.empty_state_button.clicked.connect(self.open_accounts_callback)
 
             layout = QVBoxLayout(self)
             layout.setContentsMargins(18, 18, 18, 18)
             layout.addLayout(toolbar)
             layout.addLayout(summary_layout)
             layout.addWidget(self.match_detail_label)
+            layout.addWidget(self.empty_state_card)
             layout.addWidget(self.table, 1)
             layout.addWidget(QLabel("采集运行日志"))
             layout.addWidget(self.run_log_view)
@@ -2401,11 +2516,12 @@ if QT_IMPORT_ERROR is None:
             except Exception as exc:
                 self.model.set_tasks([], [])
                 self.empty_label.setText("任务读取失败")
+                _set_empty_state(self.empty_state_card, self.empty_state_label, self.empty_state_button)
                 self._set_status(f"任务读取失败：{exc}")
                 return
             self.model.set_tasks(task_rows, account_rows)
             self._update_summary(task_rows, account_rows)
-            self._update_empty_label(len(task_rows))
+            self._update_empty_state(task_rows, account_rows)
             self._update_delete_batch_button()
 
         def _populate_batch_filter(self, batches, selected_batch):
@@ -2774,6 +2890,29 @@ if QT_IMPORT_ERROR is None:
             }
             return sum(1 for task in task_rows if str(task.alias).strip() not in aliases)
 
+        def _update_empty_state(self, task_rows, account_rows):
+            if not account_rows:
+                self.empty_label.setText("")
+                _set_empty_state(
+                    self.empty_state_card,
+                    self.empty_state_label,
+                    self.empty_state_button,
+                    "第一步：前往『④账号管理』配置并登录账号，再回到①导入 Excel。",
+                    self.open_accounts_callback is not None,
+                )
+                return
+            if not task_rows:
+                self.empty_label.setText("")
+                _set_empty_state(
+                    self.empty_state_card,
+                    self.empty_state_label,
+                    self.empty_state_button,
+                    "还没有导入任务。请点击「导入 Excel...」导入待处理商品。",
+                )
+                return
+            _set_empty_state(self.empty_state_card, self.empty_state_label, self.empty_state_button)
+            self._update_empty_label(len(task_rows))
+
         def _update_empty_label(self, total_rows):
             if total_rows == 0:
                 self.empty_label.setText("暂无任务")
@@ -5668,6 +5807,7 @@ if QT_IMPORT_ERROR is None:
                     db_path=self.db_path,
                     config=self.config,
                     status_callback=self.statusBar().showMessage,
+                    open_accounts_callback=lambda: self.open_accounts_tab(),
                 )
             if title == "③ 更新shopee":
                 return ApplyTab(