Add diagram editor with Mermaid import and image support

CLAUDE.md

@@ -0,0 +1,123 @@
+# PyBreeze
+
+Automation-first Python IDE built on PySide6 + JEditor, integrating Web/API/GUI/Load testing into a single environment.
+
+## Architecture
+
+**Layered architecture with Facade + Strategy patterns:**
+
+```
+pybreeze/
+├── __init__.py                  # Public API facade (start_editor, plugin re-exports)
+├── pybreeze_ui/                 # Presentation layer (PySide6 widgets)
+│   ├── editor_main/             # Main window (extends JEditor)
+│   ├── menu/                    # Menu bar builders (automation, install, tools, plugins)
+│   ├── connect_gui/ssh/         # SSH client widgets
+│   ├── extend_ai_gui/           # LLM code review & prompt editors
+│   ├── jupyter_lab_gui/         # JupyterLab tab integration
+│   ├── syntax/                  # Automation keyword highlighting definitions
+│   └── show_code_window/        # CodeWindow - output display widget
+├── extend/
+│   ├── process_executor/        # Process isolation layer (Strategy pattern)
+│   │   ├── python_task_process_manager.py  # Core: TaskProcessManager (subprocess + thread + QTimer)
+│   │   ├── process_executor_utils.py       # Factory functions: build_process / start_process
+│   │   ├── file_runner_process.py          # FileRunnerProcess for plugin run configs
+│   │   ├── api_testka/          # Each module delegates to build_process with its package name
+│   │   ├── auto_control/
+│   │   ├── web_runner/
+│   │   ├── load_density/
+│   │   ├── file_automation/
+│   │   ├── mail_thunder/
+│   │   └── test_pioneer/        # TestPioneerProcess (custom variant)
+│   └── mail_thunder_extend/     # Post-test email report hook
+├── extend_multi_language/       # Built-in i18n (English, Traditional Chinese)
+└── utils/
+    ├── exception/               # Exception hierarchy (ITEException base)
+    ├── logging/                 # pybreeze_logger
+    ├── file_process/            # File/directory utilities
+    ├── json_format/             # JSON processing
+    └── manager/package_manager/ # PackageManager class
+```
+
+**Key design patterns in use:**
+- **Facade**: `pybreeze/__init__.py` exposes `start_editor()`, `EDITOR_EXTEND_TAB`, and plugin APIs
+- **Strategy**: Each automation module (`api_testka`, `web_runner`, etc.) is a strategy that delegates to `TaskProcessManager` via `build_process()`
+- **Template Method**: `TaskProcessManager` defines the subprocess lifecycle (start -> read stdout/stderr threads -> QTimer poll -> drain -> exit)
+- **Observer**: QTimer-based polling bridges subprocess output to PySide6 UI thread via thread-safe Queues
+- **Plugin System**: Auto-discovery from `jeditor_plugins/` directory; plugins register via `register()` function
+
+## Key types
+
+- `PyBreezeMainWindow` — main window class (extends JEditor), holds `tab_widget` and `current_run_code_window`
+- `TaskProcessManager` — core process executor; manages subprocess, I/O threads, and QTimer UI updates
+- `CodeWindow` — output display widget passed to `TaskProcessManager`
+- `PackageManager` — pip wrapper for installing automation modules
+- `EDITOR_EXTEND_TAB: dict` — registry for custom tabs (key=name, value=QWidget subclass)
+
+## Branching & CI
+
+- `main` branch: stable releases, publishes `pybreeze` to PyPI
+- `dev` branch: development, publishes `pybreeze_dev` to PyPI
+- Version config: `pyproject.toml` (stable), `dev.toml` (dev) — keep both in sync when bumping
+- CI runs on GitHub Actions (Windows, Python 3.10/3.11/3.12)
+- CI steps: install deps -> pytest `test/test_utils/` -> start_automation_test -> extend_automation_test
+
+## Development
+
+```bash
+python -m pip install -r dev_requirements.txt
+python -m pytest test/test_utils/ -v --tb=short
+python -m pybreeze                              # launch the IDE
+```
+
+**Testing:**
+- Unit tests: `test/test_utils/` (pure logic: exceptions, JSON, logger, file utils, package manager, venv path, jupyter helpers)
+- Integration tests: `test/unit_test/start_automation/` (launches IDE in debug_mode, verifies startup and extend tab)
+- Run all tests before submitting changes: `python -m pytest test/test_utils/ -v`
+
+## Conventions
+
+- Python 3.10+ — use `X | Y` union syntax, not `Union[X, Y]`
+- Use `from __future__ import annotations` for deferred type evaluation
+- Use `TYPE_CHECKING` guard for imports only needed by type hints (avoid circular imports)
+- PySide6 threading: never update UI from worker threads — use Queue + QTimer pattern (see `TaskProcessManager`)
+- Exception hierarchy: all custom exceptions inherit from `ITEException`
+- Logging: use `pybreeze_logger` from `pybreeze.utils.logging.logger`
+- Plugin API: `register_programming_language()` and `register_natural_language()` from `je_editor.plugins`
+- Delete all unused code — do not leave dead imports, unreachable functions, commented-out blocks, or unused variables. If code is not called by any execution path, remove it entirely. No `# TODO: remove later` or `_old_` prefixes — delete immediately.
+
+## Security
+
+All code must follow secure-by-default principles. Review every change against the checklist below before committing.
+
+### General rules
+- Never use `eval()`, `exec()`, or `pickle.loads()` on untrusted data
+- Never use `subprocess.Popen(..., shell=True)` — always pass argument lists
+- Never log or display secrets, tokens, passwords, or API keys
+- Use `json.loads()` / `json.dumps()` for serialisation — never pickle
+- Validate all user input at system boundaries (file dialogs, URL inputs, network data)
+
+### Network requests (SSRF prevention)
+- All outbound HTTP requests must go through `diagram_net_utils.safe_download_image()` or equivalent guards
+- Only `http://` and `https://` schemes are allowed — block `file://`, `ftp://`, `data:`, `gopher://`
+- Resolved IP addresses must be checked against private/loopback/link-local ranges (`ipaddress.is_private`, `is_loopback`, `is_link_local`, `is_reserved`)
+- Enforce download size limits (default: 20 MB) and connection timeouts (default: 15s)
+- Never pass user-supplied URLs directly to `urlopen()` without validation
+
+### File I/O
+- File read/write paths from user dialogs (`QFileDialog`) are trusted (user-initiated)
+- File paths loaded from saved data (`.diagram.json`) must be validated before access:
+  - Local paths: check `path.is_file()` and verify extension is in an allowlist
+  - URLs: pass through the same SSRF validation as user-entered URLs
+- Never construct file paths by string concatenation with user input — use `pathlib.Path` with validation
+
+### Qt / UI
+- `QGraphicsTextItem` with `TextEditorInteraction` must not be enabled by default — use double-click-to-edit pattern to prevent unintended text selection issues in themed environments
+- Plugin loading (`jeditor_plugins/`) uses auto-discovery — only load `.py` files, skip files starting with `_` or `.`
+
+## Commit & PR rules
+
+- Commit messages: short imperative sentence (e.g., "Update stable version", "Fix github actions")
+- Do not mention any AI tools, assistants, or co-authors in commit messages or PR descriptions
+- Do not add `Co-Authored-By` headers referencing any AI
+- PR target: `dev` for development work, `main` for stable releases

exe/auto_py_to_exe_setting.json

@@ -63,11 +63,11 @@
   },
   {
    "optionDest": "collect_all",
-   "value": "ipython"
+   "value": "debugpy"
   },
   {
    "optionDest": "collect_all",
-   "value": "debugpy"
+   "value": "ipython"
   }
  ],
  "nonPyinstallerOptions": {

pybreeze/extend_multi_language/extend_english.py

@@ -296,6 +296,103 @@
     "file_tree_ctx_already_exists": "'{name}' already exists.",
     "file_tree_ctx_confirm_delete": "Confirm Delete",
     "file_tree_ctx_confirm_delete_message": "Are you sure you want to delete '{name}'?",
+    # Diagram Editor — Menu
+    "extend_tools_menu_diagram_editor_tab_action": "Diagram Editor Tab",
+    "extend_tools_menu_diagram_editor_tab_label": "Diagram Editor",
+    "extend_tools_menu_diagram_editor_dock_action": "Diagram Editor Dock",
+    "extend_tools_menu_diagram_editor_dock_title": "Diagram Editor",
+    # Diagram Editor — Tools
+    "diagram_editor_tool_select": "Select",
+    "diagram_editor_tool_rect": "Rect",
+    "diagram_editor_tool_rounded_rect": "Rounded",
+    "diagram_editor_tool_ellipse": "Ellipse",
+    "diagram_editor_tool_diamond": "Diamond",
+    "diagram_editor_tool_connection": "Connect",
+    "diagram_editor_tool_text": "Text",
+    # Diagram Editor — Actions
+    "diagram_editor_action_new": "New",
+    "diagram_editor_action_open": "Open",
+    "diagram_editor_action_save": "Save",
+    "diagram_editor_action_save_as": "Save As",
+    "diagram_editor_action_import": "Import",
+    "diagram_editor_action_export_png": "PNG",
+    "diagram_editor_action_export_svg": "SVG",
+    "diagram_editor_action_zoom_fit": "Fit",
+    "diagram_editor_action_undo": "Undo",
+    "diagram_editor_action_redo": "Redo",
+    "diagram_editor_action_grid": "Grid",
+    "diagram_editor_action_snap": "Snap",
+    # Diagram Editor — Align
+    "diagram_editor_align_menu": "Align",
+    "diagram_editor_align_left": "Align Left",
+    "diagram_editor_align_right": "Align Right",
+    "diagram_editor_align_top": "Align Top",
+    "diagram_editor_align_bottom": "Align Bottom",
+    "diagram_editor_align_center_h": "Center Horizontal",
+    "diagram_editor_align_center_v": "Center Vertical",
+    "diagram_editor_distribute_h": "Distribute Horizontal",
+    "diagram_editor_distribute_v": "Distribute Vertical",
+    # Diagram Editor — Dialogs
+    "diagram_editor_confirm_title": "Confirm",
+    "diagram_editor_confirm_new": "Discard current diagram?",
+    "diagram_editor_dialog_open": "Open Diagram",
+    "diagram_editor_dialog_save": "Save Diagram",
+    "diagram_editor_dialog_export_png": "Export PNG",
+    "diagram_editor_dialog_export_svg": "Export SVG",
+    "diagram_editor_error_title": "Error",
+    # Diagram Editor — Property Panel
+    "diagram_editor_prop_title": "Properties",
+    "diagram_editor_prop_no_selection": "No selection",
+    "diagram_editor_prop_node_group": "Node",
+    "diagram_editor_prop_conn_group": "Connection",
+    "diagram_editor_prop_text": "Text",
+    "diagram_editor_prop_width": "Width",
+    "diagram_editor_prop_height": "Height",
+    "diagram_editor_prop_shape": "Shape",
+    "diagram_editor_prop_fill_color": "Fill",
+    "diagram_editor_prop_border_color": "Border",
+    "diagram_editor_prop_font_size": "Font Size",
+    "diagram_editor_prop_label": "Label",
+    "diagram_editor_prop_line_style": "Style",
+    "diagram_editor_prop_line_color": "Color",
+    "diagram_editor_prop_line_width": "Width",
+    # Diagram Editor — Shape / Style names
+    "diagram_editor_shape_rectangle": "Rectangle",
+    "diagram_editor_shape_rounded_rect": "Rounded Rect",
+    "diagram_editor_shape_ellipse": "Ellipse",
+    "diagram_editor_shape_diamond": "Diamond",
+    "diagram_editor_style_solid": "Solid",
+    "diagram_editor_style_dashed": "Dashed",
+    "diagram_editor_style_dotted": "Dotted",
+    # Diagram Editor — Context Menu
+    "diagram_editor_ctx_delete": "Delete",
+    "diagram_editor_ctx_duplicate": "Duplicate",
+    "diagram_editor_ctx_bring_front": "Bring to Front",
+    "diagram_editor_ctx_send_back": "Send to Back",
+    "diagram_editor_ctx_select_all": "Select All",
+    "diagram_editor_ctx_paste": "Paste",
+    # Diagram Editor — Image
+    "diagram_editor_tool_image_file": "Image",
+    "diagram_editor_tool_image_url": "URL Image",
+    "diagram_editor_dialog_image_file": "Open Image",
+    "diagram_editor_dialog_image_url": "Image URL",
+    "diagram_editor_dialog_image_url_hint": "Enter image URL:",
+    "diagram_editor_image_load_failed": "Failed to load image.",
+    "diagram_editor_prop_img_group": "Image",
+    "diagram_editor_prop_caption": "Caption",
+    "diagram_editor_prop_source": "Source",
+    # Diagram Editor — Mermaid Import
+    "diagram_editor_import_title": "Import Mermaid Diagram",
+    "diagram_editor_import_hint": "Paste Mermaid flowchart code below:",
+    "diagram_editor_import_convert": "Convert",
+    "diagram_editor_import_cancel": "Cancel",
+    "diagram_editor_import_error": "Parse Error",
+    "diagram_editor_import_empty": "No nodes found in the input.",
+    # Diagram Editor — Status Bar
+    "diagram_editor_status_select": "Click to select, drag to move. Right-click to pan.",
+    "diagram_editor_status_add_node": "Click canvas to place a node.",
+    "diagram_editor_status_connection": "Click source node, then click target node.",
+    "diagram_editor_status_text": "Click canvas to place a text node.",
     # Plugin Browser
     "plugin_browser_tab_name": "Plugin Browser",
     "plugin_browser_repo_label": "Repository URL:",

pybreeze/extend_multi_language/extend_traditional_chinese.py

@@ -274,6 +274,103 @@
     "jupyterlab_loading": "載入中...",
     "jupyterlab_timeout": "JupyterLab 啟動超時",
     "jupyterlab_init_failed": "JupyterLab 啟動失敗",
+    # Diagram Editor — 選單
+    "extend_tools_menu_diagram_editor_tab_action": "架構圖編輯器分頁",
+    "extend_tools_menu_diagram_editor_tab_label": "架構圖編輯器",
+    "extend_tools_menu_diagram_editor_dock_action": "架構圖編輯器停駐窗格",
+    "extend_tools_menu_diagram_editor_dock_title": "架構圖編輯器",
+    # Diagram Editor — 工具
+    "diagram_editor_tool_select": "選取",
+    "diagram_editor_tool_rect": "矩形",
+    "diagram_editor_tool_rounded_rect": "圓角",
+    "diagram_editor_tool_ellipse": "橢圓",
+    "diagram_editor_tool_diamond": "菱形",
+    "diagram_editor_tool_connection": "連線",
+    "diagram_editor_tool_text": "文字",
+    # Diagram Editor — 動作
+    "diagram_editor_action_new": "新增",
+    "diagram_editor_action_open": "開啟",
+    "diagram_editor_action_save": "儲存",
+    "diagram_editor_action_save_as": "另存新檔",
+    "diagram_editor_action_import": "匯入",
+    "diagram_editor_action_export_png": "PNG",
+    "diagram_editor_action_export_svg": "SVG",
+    "diagram_editor_action_zoom_fit": "全覽",
+    "diagram_editor_action_undo": "復原",
+    "diagram_editor_action_redo": "重做",
+    "diagram_editor_action_grid": "格線",
+    "diagram_editor_action_snap": "對齊",
+    # Diagram Editor — 對齊
+    "diagram_editor_align_menu": "對齊",
+    "diagram_editor_align_left": "靠左對齊",
+    "diagram_editor_align_right": "靠右對齊",
+    "diagram_editor_align_top": "靠上對齊",
+    "diagram_editor_align_bottom": "靠下對齊",
+    "diagram_editor_align_center_h": "水平置中",
+    "diagram_editor_align_center_v": "垂直置中",
+    "diagram_editor_distribute_h": "水平均分",
+    "diagram_editor_distribute_v": "垂直均分",
+    # Diagram Editor — 對話框
+    "diagram_editor_confirm_title": "確認",
+    "diagram_editor_confirm_new": "是否捨棄目前的架構圖？",
+    "diagram_editor_dialog_open": "開啟架構圖",
+    "diagram_editor_dialog_save": "儲存架構圖",
+    "diagram_editor_dialog_export_png": "匯出 PNG",
+    "diagram_editor_dialog_export_svg": "匯出 SVG",
+    "diagram_editor_error_title": "錯誤",
+    # Diagram Editor — 屬性面板
+    "diagram_editor_prop_title": "屬性",
+    "diagram_editor_prop_no_selection": "未選取",
+    "diagram_editor_prop_node_group": "節點",
+    "diagram_editor_prop_conn_group": "連線",
+    "diagram_editor_prop_text": "文字",
+    "diagram_editor_prop_width": "寬度",
+    "diagram_editor_prop_height": "高度",
+    "diagram_editor_prop_shape": "形狀",
+    "diagram_editor_prop_fill_color": "填充",
+    "diagram_editor_prop_border_color": "邊框",
+    "diagram_editor_prop_font_size": "字體大小",
+    "diagram_editor_prop_label": "標籤",
+    "diagram_editor_prop_line_style": "樣式",
+    "diagram_editor_prop_line_color": "顏色",
+    "diagram_editor_prop_line_width": "寬度",
+    # Diagram Editor — 形狀 / 樣式名稱
+    "diagram_editor_shape_rectangle": "矩形",
+    "diagram_editor_shape_rounded_rect": "圓角矩形",
+    "diagram_editor_shape_ellipse": "橢圓",
+    "diagram_editor_shape_diamond": "菱形",
+    "diagram_editor_style_solid": "實線",
+    "diagram_editor_style_dashed": "虛線",
+    "diagram_editor_style_dotted": "點線",
+    # Diagram Editor — 右鍵選單
+    "diagram_editor_ctx_delete": "刪除",
+    "diagram_editor_ctx_duplicate": "複製",
+    "diagram_editor_ctx_bring_front": "移到最前",
+    "diagram_editor_ctx_send_back": "移到最後",
+    "diagram_editor_ctx_select_all": "全選",
+    "diagram_editor_ctx_paste": "貼上",
+    # Diagram Editor — 圖片
+    "diagram_editor_tool_image_file": "圖片",
+    "diagram_editor_tool_image_url": "網路圖片",
+    "diagram_editor_dialog_image_file": "開啟圖片",
+    "diagram_editor_dialog_image_url": "圖片網址",
+    "diagram_editor_dialog_image_url_hint": "輸入圖片網址：",
+    "diagram_editor_image_load_failed": "無法載入圖片。",
+    "diagram_editor_prop_img_group": "圖片",
+    "diagram_editor_prop_caption": "標題",
+    "diagram_editor_prop_source": "來源",
+    # Diagram Editor — Mermaid 匯入
+    "diagram_editor_import_title": "匯入 Mermaid 架構圖",
+    "diagram_editor_import_hint": "在下方貼上 Mermaid 流程圖程式碼：",
+    "diagram_editor_import_convert": "轉換",
+    "diagram_editor_import_cancel": "取消",
+    "diagram_editor_import_error": "解析錯誤",
+    "diagram_editor_import_empty": "輸入中找不到任何節點。",
+    # Diagram Editor — 狀態列
+    "diagram_editor_status_select": "點擊選取，拖曳移動。右鍵平移畫布。",
+    "diagram_editor_status_add_node": "點擊畫布放置節點。",
+    "diagram_editor_status_connection": "點擊來源節點，再點擊目標節點。",
+    "diagram_editor_status_text": "點擊畫布放置文字節點。",
     # File Tree Context Menu
     "file_tree_ctx_new_file": "新增檔案",
     "file_tree_ctx_new_folder": "新增資料夾",

pybreeze/pybreeze_ui/diagram_editor/diagram_commands.py

@@ -0,0 +1,28 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
+from PySide6.QtGui import QUndoCommand
+
+if TYPE_CHECKING:
+    from pybreeze.pybreeze_ui.diagram_editor.diagram_scene import DiagramScene
+
+
+class DiagramSnapshotCommand(QUndoCommand):
+    """Snapshot-based undo/redo: stores full scene state before and after a change."""
+
+    def __init__(self, scene: DiagramScene, description: str, old_data: dict, new_data: dict):
+        super().__init__(description)
+        self._scene = scene
+        self._old_data = old_data
+        self._new_data = new_data
+        self._first_redo = True
+
+    def redo(self) -> None:
+        if self._first_redo:
+            self._first_redo = False
+            return
+        self._scene._restore_from_dict(self._new_data)
+
+    def undo(self) -> None:
+        self._scene._restore_from_dict(self._old_data)