feat: complete T-528 cmhub billing feedback

app/ai.py

@@ -1082,6 +1082,15 @@ def _emit_generation_error(callback, task, phase, step, exc, error):
         "error": diagnostics.redact_log_text(error),
         "exception": exc,
     }
+    code = getattr(exc, "code", None)
+    status = getattr(exc, "status", None)
+    retryable = getattr(exc, "retryable", None)
+    if code is not None:
+        payload["code"] = str(code)
+    if status is not None:
+        payload["status"] = status
+    if retryable is not None:
+        payload["retryable"] = bool(retryable)
     try:
         callback(payload)
     except Exception:

app/gui/tabs/generate.py

@@ -102,6 +102,8 @@ class GenerateTab(QWidget):
         self.cover_progress_bar.setValue(0)
         self.failed_progress_label = QLabel("失败 0")
         self.failed_progress_label.setObjectName("generateFailedProgressLabel")
+        self.cmhub_balance_label = QLabel("cmhub余额：未获取")
+        self.cmhub_balance_label.setObjectName("generateCmhubBalanceLabel")
 
         left_panel = QWidget()
         left_layout = QVBoxLayout(left_panel)
@@ -196,6 +198,7 @@ class GenerateTab(QWidget):
         cover_progress_layout.addWidget(self.cover_progress_label)
         cover_progress_layout.addWidget(self.cover_progress_bar, 1)
         cover_progress_layout.addWidget(self.failed_progress_label)
+        cover_progress_layout.addWidget(self.cmhub_balance_label)
         progress_layout = QVBoxLayout()
         progress_layout.addLayout(title_progress_layout)
         progress_layout.addLayout(cover_progress_layout)
@@ -239,6 +242,7 @@ class GenerateTab(QWidget):
         self.refresh_cover_templates()
         self.refresh_tasks()
         self._show_current_run_log_empty()
+        self._update_cmhub_balance_label({})
 
     def _set_status(self, message):
         if self.status_callback is not None:
@@ -278,7 +282,7 @@ class GenerateTab(QWidget):
         payload = {
             key: value
             for key, value in self.config.items()
-            if key not in {"config_path", "ai_models_path"}
+            if key not in {"config_path", "ai_models_path", "cmhub_config_path"}
         }
         payload["ai"] = ai_settings
         try:
@@ -289,7 +293,7 @@ class GenerateTab(QWidget):
         internal = {
             key: value
             for key, value in self.config.items()
-            if key in {"config_path", "ai_models_path"}
+            if key in {"config_path", "ai_models_path", "cmhub_config_path"}
         }
         self.config.clear()
         self.config.update(saved)
@@ -489,6 +493,7 @@ class GenerateTab(QWidget):
         worker.finished.connect(self._on_generate_finished)
         worker.cancelled.connect(self._on_generate_cancelled)
         self._reset_generate_run_log(tasks, generate_cover)
+        self._reset_cmhub_balance_label()
         thread = run_worker(worker, thread_name="GenerateWorker", start=False)
         thread.finished.connect(lambda: self._forget_generate_thread(thread))
         self.generate_worker = worker
@@ -640,6 +645,7 @@ class GenerateTab(QWidget):
 
     def _on_generate_progress(self, payload):
         self._update_generate_progress(payload)
+        self._update_cmhub_balance_label(payload)
         self._set_status("生成进度：" + self._generate_progress_text(payload))
 
     def _on_generate_row_updated(self, task_id, fields):
@@ -652,6 +658,11 @@ class GenerateTab(QWidget):
         self._set_generate_running(False)
         self.refresh_tasks()
         self._update_generate_progress(payload)
+        self._update_cmhub_balance_label(payload)
+        billing_error = payload.get("billing_error")
+        if billing_error:
+            self._show_billing_error(billing_error)
+            return
         if payload.get("error"):
             self._set_status(f"AI 生成失败：{payload.get('error')}")
             return
@@ -661,6 +672,11 @@ class GenerateTab(QWidget):
         self._set_generate_running(False)
         self.refresh_tasks()
         self._update_generate_progress(payload)
+        self._update_cmhub_balance_label(payload)
+        billing_error = payload.get("billing_error")
+        if billing_error:
+            self._show_billing_error(billing_error)
+            return
         self._set_status("AI 生成已停止：" + self._generate_progress_text(payload))
 
     def _update_generate_progress(self, payload):
@@ -676,6 +692,36 @@ class GenerateTab(QWidget):
         self._set_progress_bar(self.title_progress_bar, title_done, total)
         self._set_progress_bar(self.cover_progress_bar, cover_done, cover_total)
 
+    def _reset_cmhub_balance_label(self):
+        if self._is_cmhub_backend():
+            self.cmhub_balance_label.setVisible(True)
+            self.cmhub_balance_label.setText("cmhub余额：生成后刷新")
+        else:
+            self.cmhub_balance_label.setVisible(False)
+
+    def _update_cmhub_balance_label(self, payload):
+        if not self._is_cmhub_backend():
+            self.cmhub_balance_label.setVisible(False)
+            return
+        self.cmhub_balance_label.setVisible(True)
+        balance = payload.get("points_balance") if isinstance(payload, dict) else None
+        if balance is None:
+            if not self.cmhub_balance_label.text():
+                self.cmhub_balance_label.setText("cmhub余额：未获取")
+            return
+        self.cmhub_balance_label.setText(f"cmhub余额：{balance}")
+
+    def _is_cmhub_backend(self):
+        try:
+            return appconfig.ai_config(self.config).get("backend") == "cmhub"
+        except Exception:
+            return False
+
+    def _show_billing_error(self, billing_error):
+        message = billing_error.get("message") or "点数不足，请先充值。"
+        QMessageBox.warning(self, "AI生成", message)
+        self._set_status("AI 生成已中止：" + message)
+
     def _set_progress_bar(self, bar, done, total):
         maximum = max(1, int(total or 0))
         value = min(max(0, int(done or 0)), maximum)

app/gui/workers.py

@@ -24,6 +24,10 @@ class GenerateWorker(BaseWorker):
         self._account_by_alias = {}
         self._task_positions = {}
         self._eligible_total = 0
+        self._last_progress_payload = {}
+        self._cmhub_points_balance = None
+        self._billing_error = None
+        self._billing_stop_requested = False
 
     def execute(self):
         account_rows = accounts.list_accounts(path=self.db_path, config=self.config)
@@ -72,8 +76,8 @@ class GenerateWorker(BaseWorker):
                     "on_error": self._on_generation_error,
                     "generate_cover": generate_cover,
                 },
-                on_progress=self.progress.emit,
-                should_stop=self.should_cancel,
+                on_progress=self._emit_generate_progress,
+                should_stop=self._should_stop_generation,
             )
         except Exception as exc:
             error = diagnostics.redact_log_text(str(exc) or exc.__class__.__name__)
@@ -100,30 +104,59 @@ class GenerateWorker(BaseWorker):
                 payload={"error": error},
                 exc=exc,
             )
+        if self._cmhub_points_balance is not None:
+            summary["points_balance"] = self._cmhub_points_balance
+        if self._billing_error is not None:
+            summary["billing_error"] = dict(self._billing_error)
+            summary["ok"] = False
+            summary["cancelled"] = True
         summary["run_id"] = self._run_id
         summary["batch_ids"] = batch_ids
-        status = "cancelled" if summary.get("cancelled") else "done"
-        level = "warning" if summary.get("cancelled") or summary.get("error") else "info"
+        status = "failed" if summary.get("billing_error") or summary.get("error") else ("cancelled" if summary.get("cancelled") else "done")
+        level = "error" if summary.get("billing_error") or summary.get("error") else ("warning" if summary.get("cancelled") else "info")
         self._log_run_event(self._format_generate_completion(summary), level=level)
         self._finish_run_log(status, summary)
         return summary
 
+    def _emit_generate_progress(self, payload):
+        progress = dict(payload or {})
+        if self._cmhub_points_balance is not None:
+            progress["points_balance"] = self._cmhub_points_balance
+        if self._billing_error is not None:
+            progress["billing_error"] = dict(self._billing_error)
+        self._last_progress_payload = dict(progress)
+        self.progress.emit(progress)
+
+    def _should_stop_generation(self):
+        return self.should_cancel() or self._billing_stop_requested
+
     def _emit_row_update(self, task_id, fields):
         self.row_updated.emit(int(task_id), dict(fields or {}))
 
     def _on_generation_event(self, payload):
         task = payload.get("task")
+        self._remember_cmhub_metadata(payload)
         message = self._format_generation_event(payload)
         if not message:
             return
         self._log_run_event(message, task=task, level=payload.get("level") or "info")
 
+    def _remember_cmhub_metadata(self, payload):
+        metadata = payload.get("metadata")
+        if not isinstance(metadata, dict):
+            return
+        if metadata.get("points_balance") is not None:
+            self._cmhub_points_balance = metadata.get("points_balance")
+            self._emit_generate_progress(self._last_progress_payload)
+
     def _format_generation_event(self, payload):
         task = payload.get("task")
         phase = payload.get("phase") or "generate"
         step = payload.get("step") or "unknown"
         result = payload.get("result") or "start"
         detail = self._short_detail(payload.get("detail"))
+        if isinstance(payload.get("metadata"), dict):
+            return self._format_cmhub_billing_event(task, phase, payload.get("metadata"))
         if phase == "title":
             if result == "start" and step == "title_submit":
                 return f"[标题] {self._task_progress_label(task)} 开始生成"
@@ -154,6 +187,22 @@ class GenerateWorker(BaseWorker):
             return None
         return None
 
+    def _format_cmhub_billing_event(self, task, phase, metadata):
+        label = "标题" if phase == "title" else ("图片" if phase == "cover" else "AI")
+        parts = []
+        alias = metadata.get("alias") or metadata.get("model_used")
+        if alias:
+            parts.append(f"别名 {alias}")
+        if metadata.get("points_cost") is not None:
+            parts.append(f"扣点 {metadata.get('points_cost')}")
+        if metadata.get("points_balance") is not None:
+            parts.append(f"余额 {metadata.get('points_balance')}")
+        if metadata.get("call_id"):
+            parts.append(f"call_id={metadata.get('call_id')}")
+        if not parts:
+            return None
+        return f"[计费] {self._task_plain_label(task)} {label}生成：" + "，".join(str(part) for part in parts)
+
     def _retry_message(self, label, task, payload, detail):
         attempt = int(payload.get("attempt", 0) or 0)
         attempts = int(payload.get("attempts", 0) or 0)
@@ -192,6 +241,9 @@ class GenerateWorker(BaseWorker):
 
     def _format_generate_completion(self, summary):
         progress = self._summary_text(summary)
+        billing_error = summary.get("billing_error") or {}
+        if billing_error:
+            return f"[失败] AI 生成已中止：{billing_error.get('message') or '点数不足，请先充值'}，{progress}"
         if summary.get("cancelled"):
             return f"[停止] AI 生成已停止：{progress}"
         if summary.get("error"):
@@ -212,14 +264,40 @@ class GenerateWorker(BaseWorker):
         task = payload.get("task")
         phase = payload.get("phase") or "generate"
         step = payload.get("step") or "unknown"
+        exception = payload.get("exception")
+        code = payload.get("code") or getattr(exception, "code", None)
+        status = payload.get("status") or getattr(exception, "status", None)
         error = diagnostics.redact_log_text(payload.get("error") or "未知错误")
+        if str(code or "") == "insufficient_points":
+            self._billing_stop_requested = True
+            message = "点数不足，请先充值。本轮未开始任务将停止。"
+            self._billing_error = {
+                "code": "insufficient_points",
+                "message": message,
+                "phase": phase,
+                "task_id": getattr(task, "id", None),
+                "item_id": getattr(task, "item_id", None),
+            }
+            if status is not None:
+                self._billing_error["status"] = status
+            self._log_run_event(
+                f"[计费] {self._task_plain_label(task)} 点数不足，请先充值；本轮未开始任务将停止",
+                task=task,
+                level="error",
+            )
+            self._emit_generate_progress(self._last_progress_payload)
+        diagnostic_payload = {"phase": phase, "error": error}
+        if code is not None:
+            diagnostic_payload["code"] = str(code)
+        if status is not None:
+            diagnostic_payload["status"] = status
         self._write_diagnostic_log(
             "AI生成任务失败",
             level="ERROR",
             step=step,
             task=task,
-            payload={"phase": phase, "error": error},
-            exc=payload.get("exception"),
+            payload=diagnostic_payload,
+            exc=exception,
         )
 
     def _batch_ids(self, tasks):
@@ -245,6 +323,7 @@ class GenerateWorker(BaseWorker):
                     "title_concurrency": ai_cfg.get("title_concurrency"),
                     "image_concurrency": ai_cfg.get("image_concurrency"),
                     "generate_cover": ai_cfg.get("generate_cover", False),
+                    "backend": ai_cfg.get("backend", "direct"),
                 },
                 path=self.db_path,
             )

docs/06-tasks.md

@@ -126,7 +126,7 @@
 | --- | --- | --- | --- | --- |
 | T-526 | `app/ai.py` + `appconfig` 接入 cmhub backend | T-301, T-303, T-520 | 依据 `docs/cmhub-integration-design.md` v3.2。`config.json` 的 `ai` 段加 `backend`（`cmhub`/`direct`）+ `cmhub` 子段（`base_url`/`title_alias`/`image_alias`/`connect_timeout` 等）；为保护既有用户，全新配置默认 `backend=direct`、加载既有配置缺 `backend` 时也补 `direct`，`cmhub` 一律由用户在⑤显式 opt-in；`backend=cmhub` 但 `base_url`/Key 缺失时须抛清晰「请去⑤配置 cmhub」错误（`CMHubError`/`AIError`），不崩溃、不静默直连。cmhub API Key 固定存 `config/cmhub.json`（schema `{ "api_key": "..." }`），新增读写/打码 helper 并把该文件加入 `.gitignore`；日志脱敏。`gen_title`/`gen_cover` **返回值不变**，内层按 backend 分流并保留 `direct`；计费元数据不塞进返回值，允许给二者**新增一个可选事件回调参数**（如 `on_meta`/`on_event`）承载，属向后兼容加参，`generate_batch` 显式传回调不受影响。cmhub 分支：生文 `POST /api/v1/generate/title` 体 `{prompt,model:别名,resolution?}`、取 `titles[0]`、空则 `AIError`；生图 `POST /api/v1/generate/image` 体 `{prompt,model:别名,image_base64:<旧封面>,resolution,aspect_ratio:"1:1"}`、拿 `image_url` 后**立即下载**再走 `_save_jpeg`；`resolution` 归一大写 `512/1K/2K/4K`。新增 `CMHubError(AIError)`，带 `code/status/retryable/retry_after`，错误按 `code` 优先分支（`insufficient_points`/`unauthorized`/`account_disabled`/`bad_request`/`model_not_allowed`/`no_pricing_rule`/`content_blocked`/`upstream_error`/`rate_limited`，未知 code 当不可重试）；cmhub HTTP helper 需区分 connect/read timeout（优先用 `requests timeout=(connect, read)`），只对 502/429/连接超时重试，生图读超时绝不自动重发，读超时按分辨率封顶 600s。`points_cost`/`points_balance`/`call_id` 不改返回值，通过 `on_step`/事件回调上报；T-526 只保证 metadata 事件完整传出，T-528 再由 GUI worker 脱敏写 run_logs 和余额展示。`image_url` 下载必须限制 http/https、拒绝内网/回环地址、校验域名解析后的 IP 仍不是内网/回环/本机地址，并设置超时和大小上限。新增 `fetch_cmhub_models(base_url, api_key)` helper 调 `GET /api/v1/models` 返回别名清单（`alias/operation_type/requires_image/pricing_status/prices`）供 T-527 渲染下拉，错误脱敏。不碰 editor/cdp/chrome/accounts/excel/db，也不改 ①③④流程。`tests/test_ai.py` 加 cmhub mock（titles 列表、image_url 下载、安全下载、错误码与重试、读超时不重发、metadata 事件）、`tests/test_appconfig.py` 加 schema 和 key 文件 helper，direct 用例保持绿 | DONE |
 | T-527 | ⑤设置 cmhub 网关面板 | T-526, T-517 | 依据 `docs/cmhub-integration-design.md` v3.2。⑤ AI 设置按 `backend` 切换：cmhub 模式显示「网关 Base URL + API Key（打码，提示从网页端复制、仅显示一次）+ 生文别名 + 生图别名 + 测试连接/查余额」；**别名从 `GET /api/v1/models`（T-526 的 `fetch_cmhub_models`）动态拉取渲染下拉**，按 `operation_type` 分生文/生图，过滤 `pricing_status="unpriced"` 的别名，可展示单价与 `requires_image` 提示，选中值持久化到 `ai.cmhub.title_alias/image_alias`（网关临时不可达时回退已存值）；不写死别名。direct 模式保留现有 AI 模型 master-detail。保存写 `config.json` 的 `ai` 段与 `config/cmhub.json`；切换 backend 时不删除 legacy `config/ai_models.json`。测试连接/查余额经后台 worker 调 cmhub（复用 `AIModelTestWorker` 思路或新增 worker），错误必须脱敏并给用户可读提示。同步 GUI 设置测试；不改 Shopee/CDP 流程 | DONE |
-| T-528 | ② 计费错误提示 + 余额展示 | T-526, T-527, T-303 | 依据 `docs/cmhub-integration-design.md` v3.2。② AI生成页把 cmhub 计费失败态显式化：通过 `CMHubError.code` 识别 `insufficient_points`，弹明确提示「点数不足，请先充值」并引导去网页端充值，本轮未开始任务可提前中止，不靠中文字符串匹配、不淹没在失败计数里；用 T-526 成功响应事件里的 `points_balance` 刷新②页剩余点数显示，`/balance` 仅作手动刷新/可选批量前预检；`points_cost`/`call_id` 记入脱敏 run_logs。只改② UI、`GenerateWorker` 事件处理/文案及 GUI 单测；不改 AI HTTP 协议、DB schema、Excel、Shopee/CDP 流程 | TODO |
+| T-528 | ② 计费错误提示 + 余额展示 | T-526, T-527, T-303 | 依据 `docs/cmhub-integration-design.md` v3.2。② AI生成页把 cmhub 计费失败态显式化：通过 `CMHubError.code` 识别 `insufficient_points`，弹明确提示「点数不足，请先充值」并引导去网页端充值，本轮未开始任务可提前中止，不靠中文字符串匹配、不淹没在失败计数里；用 T-526 成功响应事件里的 `points_balance` 刷新②页剩余点数显示，`/balance` 仅作手动刷新/可选批量前预检；`points_cost`/`call_id` 记入脱敏 run_logs。只改② UI、`GenerateWorker` 事件处理/文案及 GUI 单测；不改 AI HTTP 协议、DB schema、Excel、Shopee/CDP 流程 | DONE |
 
 ## Phase 8 · 工程基础设施后续（`docs/engineering-review.md`）
 

progress.md

@@ -1124,4 +1124,14 @@
 - 测试：`tests/test_ai.py` 覆盖 cmhub 余额 helper；`tests/test_gui.py` 覆盖 `CMHubSettingsWorker` 成功/失败脱敏、设置页 cmhub backend 切换、保存 `config.json` + `config/cmhub.json`、别名过滤与已存值保留。
 - 文档：`docs/06-tasks.md` 将 T-527 标为 DONE；同步 `docs/current-state.md`，下一步为 T-528。
 - 验证：`python -m py_compile tests\test_ai.py tests\test_gui.py` 通过；`python -m unittest discover -s tests -p "test_ai.py"` 通过（17 tests）；`python -m unittest discover -s tests -p "test_gui.py"` 通过（77 tests）；`python -m compileall app main.py` 通过；`python -m unittest discover -s tests` 通过（184 tests）；`git diff --check` 无空白错误（仅 LF/CRLF 提示）。全量测试仍有本机 PySide6 字体目录提示，不影响结果。
-- 下一步：T-528 ②计费错误提示 + 余额展示。
+- 下一步：T-528 ②计费错误提示 + 余额展示。
+
+## 【2026-07-04】T-528 完成 · ②计费错误提示 + 余额展示
+
+- 状态：DONE
+- 代码：②AI生成页新增 cmhub 余额显示，仅在 `backend=cmhub` 时展示；`GenerateWorker` 读取 cmhub metadata，把 `points_cost`、`points_balance`、`call_id` 以脱敏用户日志写入 `run_logs/run_log_events`，并把最新 `points_balance` 回传给页面。
+- 点数不足：`app/ai.py` 的生成错误回调会透传 `CMHubError.code/status/retryable`；`GenerateWorker` 通过 `code=insufficient_points` 识别点数不足，设置本轮停止标记，弹「点数不足，请先充值。本轮未开始任务将停止。」并让未开始任务不再继续，不靠中文错误字符串匹配。
+- 边界：只改②AI生成 UI、worker 事件处理和测试；未改 AI HTTP 协议、DB schema、Excel、Shopee/CDP 流程。
+- 文档：`docs/06-tasks.md` 将 T-528 标为 DONE；同步 `docs/current-state.md`，下一个可领取任务回到 T-525 ruff。
+- 测试：`python -m unittest discover -s tests -p test_gui.py` 通过（80 tests）；`python -m unittest discover -s tests -p test_ai.py` 通过（17 tests）；`python -m compileall app main.py` 通过；`python -m unittest discover -s tests` 通过（187 tests）；`git diff --check` 通过，仅有本机 LF/CRLF 提示。全量测试仍有本机 PySide6 字体目录提示，不影响结果。
+- 下一步：T-525「引入 ruff（lint + format）+ 可选 pre-commit」。

tests/test_gui.py

@@ -12,7 +12,7 @@ sys.path.insert(0, os.path.dirname(__file__))
 from _helpers import TempDirMixin
 
 from app import gui
-from app import accounts, appconfig, db, prompts
+from app import accounts, ai, appconfig, db, prompts
 
 if gui.QT_IMPORT_ERROR is not None:
     raise unittest.SkipTest("PySide6 未安装")
@@ -962,6 +962,9 @@ class GuiTests(TempDirMixin, unittest.TestCase):
             self.assertEqual("标题 0/0", tab.title_progress_label.text())
             self.assertEqual("图片 0/0", tab.cover_progress_label.text())
             self.assertEqual("失败 0", tab.failed_progress_label.text())
+            self.assertEqual("generateCmhubBalanceLabel", tab.cmhub_balance_label.objectName())
+            self.assertEqual("cmhub余额：未获取", tab.cmhub_balance_label.text())
+            self.assertTrue(tab.cmhub_balance_label.isHidden())
             self.assertEqual(0, tab.title_progress_bar.value())
             self.assertEqual(0, tab.cover_progress_bar.value())
             self.assertEqual(1, tab.title_progress_bar.maximum())
@@ -981,6 +984,52 @@ class GuiTests(TempDirMixin, unittest.TestCase):
 
         self.assert_removed(temp_dir)
 
+    def test_generate_tab_shows_cmhub_balance_and_billing_error(self):
+        with self.make_temp_dir() as temp_dir:
+            cfg = self.make_config(temp_dir)
+            cfg["ai"] = appconfig.ai_config(cfg)
+            cfg["ai"]["backend"] = "cmhub"
+            statuses = []
+            tab = GenerateTab(config=cfg, status_callback=statuses.append)
+            self.addCleanup(tab.close)
+
+            self.assertFalse(tab.cmhub_balance_label.isHidden())
+            self.assertEqual("cmhub余额：未获取", tab.cmhub_balance_label.text())
+
+            tab._on_generate_progress(
+                {
+                    "total": 1,
+                    "title_done": 1,
+                    "cover_done": 0,
+                    "cover_total": 0,
+                    "failed": 0,
+                    "generate_cover": False,
+                    "points_balance": 88,
+                }
+            )
+            self.assertEqual("cmhub余额：88", tab.cmhub_balance_label.text())
+
+            with mock.patch("app.gui.QMessageBox.warning") as warning:
+                tab._on_generate_finished(
+                    {
+                        "total": 1,
+                        "title_done": 0,
+                        "cover_done": 0,
+                        "cover_total": 0,
+                        "failed": 1,
+                        "billing_error": {
+                            "code": "insufficient_points",
+                            "message": "点数不足，请先充值。本轮未开始任务将停止。",
+                        },
+                    }
+                )
+
+            warning.assert_called_once()
+            self.assertIn("点数不足，请先充值", warning.call_args[0][2])
+            self.assertIn("AI 生成已中止", statuses[-1])
+
+        self.assert_removed(temp_dir)
+
     def test_generate_tab_persists_generate_cover_toggle(self):
         with self.make_temp_dir() as temp_dir:
             cfg = self.make_config(temp_dir)
@@ -1262,6 +1311,169 @@ class GuiTests(TempDirMixin, unittest.TestCase):
 
         self.assert_removed(temp_dir)
 
+    def test_generate_worker_records_cmhub_billing_metadata(self):
+        with self.make_temp_dir() as temp_dir:
+            cfg = self.make_config(temp_dir)
+            cfg["ai"] = appconfig.ai_config(cfg)
+            cfg["ai"]["backend"] = "cmhub"
+            cfg["ai"]["generate_cover"] = True
+            accounts.create_account("主店", "alias-a", debug_port=9222, config=cfg)
+            batch_id = db.create_batch(["input.xlsx"], path=cfg["db_path"])
+            db.insert_tasks(
+                batch_id,
+                [
+                    {
+                        "source_file_abs": os.path.join(temp_dir, "input.xlsx"),
+                        "source_sheet": "商品",
+                        "source_row": 2,
+                        "account_name": "Excel主店",
+                        "alias": "alias-a",
+                        "item_id": "51100639510",
+                    }
+                ],
+                path=cfg["db_path"],
+            )
+            task = db.list_tasks(batch_id=batch_id, path=cfg["db_path"])[0]
+            db.set_collected(task.id, "旧标题", "old.jpg", path=cfg["db_path"])
+            tasks = db.list_tasks(batch_id=batch_id, path=cfg["db_path"])
+            progress = []
+            logs = []
+
+            def fake_generate_batch(tasks_arg, prompt_values, ai_cfg=None, on_progress=None, should_stop=None):
+                on_progress({"total": 1, "title_done": 1, "cover_done": 0, "failed": 0})
+                ai_cfg["on_event"](
+                    {
+                        "task": tasks_arg[0],
+                        "phase": "title",
+                        "step": "title_request",
+                        "result": "meta",
+                        "metadata": {
+                            "alias": "title-standard",
+                            "points_cost": 1,
+                            "points_balance": 88,
+                            "call_id": "call-1",
+                        },
+                    }
+                )
+                return {
+                    "ok": True,
+                    "total": 1,
+                    "title_done": 1,
+                    "cover_done": 1,
+                    "cover_total": 1,
+                    "generated_done": 1,
+                    "failed": 0,
+                    "generate_cover": True,
+                }
+
+            worker = GenerateWorker(
+                tasks,
+                {"title": "标题提示", "cover": "封面提示"},
+                db_path=cfg["db_path"],
+                config=cfg,
+            )
+            worker.progress.connect(progress.append)
+            worker.log.connect(logs.append)
+
+            with mock.patch("app.gui.ai.generate_batch", side_effect=fake_generate_batch):
+                summary = worker.execute()
+
+            self.assertEqual(88, summary["points_balance"])
+            self.assertEqual(88, progress[-1]["points_balance"])
+            joined_logs = "\n".join(logs)
+            self.assertIn("[计费] 商品 51100639510", joined_logs)
+            self.assertIn("别名 title-standard", joined_logs)
+            self.assertIn("扣点 1", joined_logs)
+            self.assertIn("余额 88", joined_logs)
+            self.assertIn("call_id=call-1", joined_logs)
+            run_log = db.list_run_logs(limit=1, run_type="generate", path=cfg["db_path"])[0]
+            self.assertEqual("cmhub", run_log.options["backend"])
+            events = db.list_run_log_events(summary["run_id"], path=cfg["db_path"])
+            messages = "\n".join(event.message for event in events)
+            self.assertIn("[计费] 商品 51100639510", messages)
+            self.assertIn("余额 88", messages)
+
+        self.assert_removed(temp_dir)
+
+    def test_generate_worker_stops_on_cmhub_insufficient_points(self):
+        with self.make_temp_dir() as temp_dir:
+            cfg = self.make_config(temp_dir)
+            cfg["ai"] = appconfig.ai_config(cfg)
+            cfg["ai"]["backend"] = "cmhub"
+            accounts.create_account("主店", "alias-a", debug_port=9222, config=cfg)
+            batch_id = db.create_batch(["input.xlsx"], path=cfg["db_path"])
+            db.insert_tasks(
+                batch_id,
+                [
+                    {
+                        "source_file_abs": os.path.join(temp_dir, "input.xlsx"),
+                        "source_sheet": "商品",
+                        "source_row": 2,
+                        "account_name": "Excel主店",
+                        "alias": "alias-a",
+                        "item_id": "51100639510",
+                    }
+                ],
+                path=cfg["db_path"],
+            )
+            task = db.list_tasks(batch_id=batch_id, path=cfg["db_path"])[0]
+            db.set_collected(task.id, "旧标题", "old.jpg", path=cfg["db_path"])
+            tasks = db.list_tasks(batch_id=batch_id, path=cfg["db_path"])
+            progress = []
+            logs = []
+
+            def fake_generate_batch(tasks_arg, prompt_values, ai_cfg=None, on_progress=None, should_stop=None):
+                exc = ai.CMHubError("insufficient_points", "点数不足，请先充值", status=402)
+                ai_cfg["on_error"](
+                    {
+                        "task": tasks_arg[0],
+                        "phase": "title",
+                        "step": "title_request",
+                        "error": str(exc),
+                        "exception": exc,
+                        "code": exc.code,
+                        "status": exc.status,
+                    }
+                )
+                self.assertTrue(should_stop())
+                return {
+                    "ok": False,
+                    "total": 1,
+                    "title_done": 0,
+                    "cover_done": 0,
+                    "cover_total": 0,
+                    "generated_done": 0,
+                    "failed": 1,
+                    "cancelled": should_stop(),
+                    "generate_cover": False,
+                }
+
+            worker = GenerateWorker(
+                tasks,
+                {"title": "标题提示", "cover": "封面提示"},
+                db_path=cfg["db_path"],
+                config=cfg,
+            )
+            worker.progress.connect(progress.append)
+            worker.log.connect(logs.append)
+
+            with mock.patch("app.gui.ai.generate_batch", side_effect=fake_generate_batch):
+                summary = worker.execute()
+
+            self.assertFalse(summary["ok"])
+            self.assertTrue(summary["cancelled"])
+            self.assertEqual("insufficient_points", summary["billing_error"]["code"])
+            self.assertIn("点数不足，请先充值", summary["billing_error"]["message"])
+            self.assertEqual("insufficient_points", progress[-1]["billing_error"]["code"])
+            joined_logs = "\n".join(logs)
+            self.assertIn("[计费] 商品 51100639510", joined_logs)
+            self.assertIn("点数不足，请先充值", joined_logs)
+            run_log = db.list_run_logs(limit=1, run_type="generate", path=cfg["db_path"])[0]
+            self.assertEqual("failed", run_log.status)
+            self.assertEqual("insufficient_points", run_log.summary["billing_error"]["code"])
+
+        self.assert_removed(temp_dir)
+
     def test_generate_worker_writes_run_log_and_diagnostic_log_on_image_failure(self):
         with self.make_temp_dir() as temp_dir:
             cfg = self.make_config(temp_dir)