feat: add chrome path picker

app/gui/tabs/settings.py

@@ -3,6 +3,7 @@
 from __future__ import annotations
 
 from contextlib import contextmanager
+import os
 
 from ... import ai as ai_module
 from ..widgets import *
@@ -165,6 +166,15 @@ class SettingsTab(QWidget):
         self.jpg_quality_spin.setRange(1, 100)
         self.chrome_path_edit = QLineEdit()
         self.chrome_path_edit.setObjectName("chromePathEdit")
+        self.chrome_path_browse_button = QPushButton("选择...")
+        self.chrome_path_browse_button.setObjectName("chromePathBrowseButton")
+        self.chrome_path_widget = QWidget()
+        self.chrome_path_widget.setObjectName("chromePathWidget")
+        chrome_path_layout = QHBoxLayout(self.chrome_path_widget)
+        chrome_path_layout.setContentsMargins(0, 0, 0, 0)
+        chrome_path_layout.setSpacing(8)
+        chrome_path_layout.addWidget(self.chrome_path_edit, 1)
+        chrome_path_layout.addWidget(self.chrome_path_browse_button)
         self.user_data_root_edit = QLineEdit()
         self.user_data_root_edit.setObjectName("userDataRootEdit")
         self.user_data_root_edit.setEnabled(False)
@@ -271,7 +281,7 @@ class SettingsTab(QWidget):
 
         path_form = self._three_column_form(
             [
-                ("Chrome路径", self.chrome_path_edit, True),
+                ("Chrome路径", self.chrome_path_widget, True),
                 ("默认调试端口", self.default_debug_port_spin),
                 ("调试端口范围", port_range_widget),
                 ("CDP就绪超时(秒)", self.cdp_ready_timeout_spin),
@@ -403,6 +413,7 @@ class SettingsTab(QWidget):
         self.resolution_combo.currentIndexChanged.connect(
             self._update_response_timeout_label
         )
+        self.chrome_path_browse_button.clicked.connect(self.browse_chrome_path)
         self.save_config_button.clicked.connect(self.save_app_settings)
         self._connect_dirty_signals()
 
@@ -533,6 +544,23 @@ class SettingsTab(QWidget):
     def is_dirty(self):
         return self._dirty
 
+    def browse_chrome_path(self, checked=False):
+        current = self.chrome_path_edit.text().strip()
+        initial_dir = ""
+        if current:
+            parent_dir = os.path.dirname(os.path.expanduser(current))
+            if parent_dir and os.path.isdir(parent_dir):
+                initial_dir = parent_dir
+        path, _selected_filter = QFileDialog.getOpenFileName(
+            self,
+            "选择 Chrome 程序",
+            initial_dir,
+            "Chrome 程序 (chrome.exe);;可执行文件 (*.exe);;所有文件 (*)",
+        )
+        if not path:
+            return
+        self.chrome_path_edit.setText(path)
+
     def discard_unsaved_changes(self):
         try:
             saved = appconfig.load_config(self.config_path)

docs/tasks/T-557.md

@@ -3,7 +3,7 @@ id: T-557
 title: ⑤设置 Chrome 路径增加文件选择按钮
 phase: 7
 deps: [T-539, T-543]
-status: TODO
+status: DONE
 created: 2026-07-08
 ---
 
@@ -44,3 +44,11 @@ created: 2026-07-08
 ## 边界（不改什么）
 
 只改⑤设置页 Chrome 路径的 GUI 选择入口和测试；不改 `config.json` schema、不改 `appconfig.chrome_path()`、不改 `app/chrome.py` 启动参数、不改④账号管理、不改 CDP/Shopee 逻辑、不引入自动搜索/自动安装/自动启动 Chrome。
+
+## 执行记录
+
+- 2026-07-08：⑤设置页「Chrome路径」改为输入框 + `选择...` 按钮的横向控件，按钮对象名为 `chromePathBrowseButton`。
+- 2026-07-08：点击 `选择...` 后调用 `QFileDialog.getOpenFileName()`，中文标题为「选择 Chrome 程序」，过滤 `chrome.exe` / `*.exe`；选中文件后回填 `chromePathEdit` 并沿用现有未保存状态机制，取消不改变路径。
+- 2026-07-08：保存逻辑仍复用现有 `save_app_settings()`，所选路径写入 `config.json` 的 `chrome_path`，未改配置 schema、Chrome 启动、账号管理或 CDP。
+- 2026-07-08：更新 GUI 单测，覆盖按钮存在、布局、选择回填、取消不改值、选择后保存写入配置。
+- 验证通过：`python -m ruff check app tests main.py`、`py -3.10 -m compileall app main.py`、`py -3.10 -m unittest discover -s tests`、`git diff --check`。

tests/test_gui.py

@@ -733,9 +733,61 @@ class GuiTests(TempDirMixin, unittest.TestCase):
                 self.assertFalse(hidden_widget.isEnabled())
                 self.assertEqual(-1, tab.infrastructure_form_layout.indexOf(hidden_widget))
             self.assertGreaterEqual(
-                tab.infrastructure_form_layout.indexOf(tab.chrome_path_edit),
+                tab.infrastructure_form_layout.indexOf(tab.chrome_path_widget),
                 0,
             )
+            self.assertEqual("选择...", tab.chrome_path_browse_button.text())
+            self.assertEqual("chromePathBrowseButton", tab.chrome_path_browse_button.objectName())
+            self.assertIs(
+                tab.chrome_path_widget.layout().itemAt(0).widget(),
+                tab.chrome_path_edit,
+            )
+            self.assertIs(
+                tab.chrome_path_widget.layout().itemAt(1).widget(),
+                tab.chrome_path_browse_button,
+            )
+
+        self.assert_removed(temp_dir)
+
+    def test_settings_tab_browses_chrome_path(self):
+        with self.make_temp_dir() as temp_dir:
+            cfg = self.make_config(temp_dir)
+            statuses = []
+            tab = SettingsTab(config=cfg, status_callback=statuses.append)
+            self.addCleanup(tab.close)
+            selected_path = os.path.join(temp_dir, "Chrome", "chrome.exe")
+            os.makedirs(os.path.dirname(selected_path), exist_ok=True)
+
+            self.assertFalse(tab.is_dirty())
+            with mock.patch(
+                "app.gui.tabs.settings.QFileDialog.getOpenFileName",
+                return_value=(selected_path, "Chrome 程序 (chrome.exe)"),
+            ) as browse:
+                tab.chrome_path_browse_button.click()
+
+            browse.assert_called_once()
+            self.assertEqual("选择 Chrome 程序", browse.call_args[0][1])
+            self.assertEqual(selected_path, tab.chrome_path_edit.text())
+            self.assertTrue(tab.is_dirty())
+            self.assertFalse(tab.unsaved_changes_label.isHidden())
+
+            with mock.patch("app.gui.QMessageBox.information") as info:
+                self.assertTrue(tab.save_app_settings())
+            info.assert_called_once_with(tab, "保存设置", "设置已保存")
+            saved = appconfig.load_config(cfg["config_path"])
+            self.assertEqual(selected_path, saved["chrome_path"])
+            self.assertFalse(tab.is_dirty())
+
+            tab._set_dirty(False)
+            previous_path = tab.chrome_path_edit.text()
+            with mock.patch(
+                "app.gui.tabs.settings.QFileDialog.getOpenFileName",
+                return_value=("", ""),
+            ):
+                tab.chrome_path_browse_button.click()
+
+            self.assertEqual(previous_path, tab.chrome_path_edit.text())
+            self.assertFalse(tab.is_dirty())
 
         self.assert_removed(temp_dir)