feat(freecad): add Silo-aware start page with webview and offline fallback

Replaces the default FreeCAD Start page with a dual-mode view:
- Online: QWebEngineView loading the Silo web app
- Offline: native Qt fallback with recent files and connectivity status

The command override is registered at InitGui.py load time, before
the C++ StartLauncher fires.

freecad/InitGui.py

@@ -67,3 +67,12 @@ class SiloWorkbench(FreeCADGui.Workbench):
 
 FreeCADGui.addWorkbench(SiloWorkbench())
 FreeCAD.Console.PrintMessage("Silo workbench registered\n")
+
+# Override the Start page with Silo-aware version (must happen before
+# the C++ StartLauncher fires at ~100ms after GUI init)
+try:
+    import silo_start
+
+    silo_start.register()
+except Exception as e:
+    FreeCAD.Console.PrintWarning(f"Silo Start page override failed: {e}\n")

freecad/resources/icons/silo-rollback.svg

@@ -0,0 +1,8 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="#cba6f7" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+  <!-- Counter-clockwise arrow -->
+  <polyline points="1 4 1 10 7 10" stroke="#f38ba8"/>
+  <path d="M3.51 15a9 9 0 1 0 2.13-9.36L1 10" stroke="#cba6f7"/>
+  <!-- Clock hands -->
+  <line x1="12" y1="7" x2="12" y2="12" stroke="#89dceb" stroke-width="1.5"/>
+  <line x1="12" y1="12" x2="15" y2="14" stroke="#89dceb" stroke-width="1.5"/>
+</svg>

freecad/resources/icons/silo-status.svg

@@ -0,0 +1,7 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="#cba6f7" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+  <!-- Shield shape -->
+  <path d="M12 22s8-4 8-10V5l-8-3-8 3v7c0 6 8 10 8 10z" fill="#313244"/>
+  <!-- Status bars -->
+  <line x1="8" y1="10" x2="16" y2="10" stroke="#a6e3a1" stroke-width="1.5"/>
+  <line x1="8" y1="14" x2="13" y2="14" stroke="#89dceb" stroke-width="1.5"/>
+</svg>

freecad/resources/icons/silo-tag.svg

@@ -0,0 +1,6 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="#cba6f7" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+  <!-- Tag shape -->
+  <path d="M20.59 13.41l-7.17 7.17a2 2 0 0 1-2.83 0L2 12V2h10l8.59 8.59a2 2 0 0 1 0 2.82z" fill="#313244"/>
+  <!-- Tag hole -->
+  <circle cx="7" cy="7" r="1.5" fill="#cba6f7" stroke="none"/>
+</svg>

freecad/silo_commands.py

@@ -1998,15 +1998,18 @@ class Silo_BOM:
 
         obj = get_tracked_object(doc)
         if not obj:
-            FreeCAD.Console.PrintError("No tracked Silo item in active document.\n")
-            from PySide import QtGui as _qg
-
-            _qg.QMessageBox.warning(
+            reply = QtGui.QMessageBox.question(
                 None,
                 "BOM",
-                "This document is not registered with Silo.\nUse Silo > New to register it first.",
+                "This document is not registered with Silo.\n\nRegister it now?",
+                QtGui.QMessageBox.Yes | QtGui.QMessageBox.No,
             )
-            return
+            if reply != QtGui.QMessageBox.Yes:
+                return
+            FreeCADGui.runCommand("Silo_New")
+            obj = get_tracked_object(doc)
+            if not obj:
+                return
 
         part_number = obj.SiloPartNumber
 
@@ -2428,7 +2431,7 @@ class SiloEventListener(QtCore.QThread):
     # -- SSE stream reader --------------------------------------------------
 
     def _listen(self):
-        url = f"{_get_api_url().rstrip('/')}/api/events"
+        url = f"{_get_api_url().rstrip('/')}/events"
         headers = {"Accept": "text/event-stream"}
         headers.update(_get_auth_headers())
         req = urllib.request.Request(url, headers=headers, method="GET")

freecad/silo_origin.py

@@ -299,9 +299,7 @@ class SiloOrigin:
             Created App.Document or None
         """
         try:
-            cmd = FreeCADGui.Command.get("Silo_New")
-            if cmd:
-                cmd.Activated()
+            FreeCADGui.runCommand("Silo_New")
             return FreeCAD.ActiveDocument
         except Exception as e:
             FreeCAD.Console.PrintError(f"Silo new document failed: {e}\n")
@@ -322,9 +320,7 @@ class SiloOrigin:
         if not identity:
             # No identity - show search dialog
             try:
-                cmd = FreeCADGui.Command.get("Silo_Open")
-                if cmd:
-                    cmd.Activated()
+                FreeCADGui.runCommand("Silo_Open")
                 return FreeCAD.ActiveDocument
             except Exception as e:
                 FreeCAD.Console.PrintError(f"Silo open failed: {e}\n")
@@ -354,9 +350,7 @@ class SiloOrigin:
             Opened App.Document or None
         """
         try:
-            cmd = FreeCADGui.Command.get("Silo_Open")
-            if cmd:
-                cmd.Activated()
+            FreeCADGui.runCommand("Silo_Open")
             return FreeCAD.ActiveDocument
         except Exception as e:
             FreeCAD.Console.PrintError(f"Silo open failed: {e}\n")
@@ -473,10 +467,8 @@ class SiloOrigin:
             True if command was executed
         """
         try:
-            cmd = FreeCADGui.Command.get("Silo_Commit")
-            if cmd:
-                cmd.Activated()
-                return True
+            FreeCADGui.runCommand("Silo_Commit")
+            return True
         except Exception as e:
             FreeCAD.Console.PrintError(f"Silo commit failed: {e}\n")
         return False
@@ -493,10 +485,8 @@ class SiloOrigin:
             True if command was executed
         """
         try:
-            cmd = FreeCADGui.Command.get("Silo_Pull")
-            if cmd:
-                cmd.Activated()
-                return True
+            FreeCADGui.runCommand("Silo_Pull")
+            return True
         except Exception as e:
             FreeCAD.Console.PrintError(f"Silo pull failed: {e}\n")
         return False
@@ -513,10 +503,8 @@ class SiloOrigin:
             True if command was executed
         """
         try:
-            cmd = FreeCADGui.Command.get("Silo_Push")
-            if cmd:
-                cmd.Activated()
-                return True
+            FreeCADGui.runCommand("Silo_Push")
+            return True
         except Exception as e:
             FreeCAD.Console.PrintError(f"Silo push failed: {e}\n")
         return False
@@ -530,9 +518,7 @@ class SiloOrigin:
             doc: FreeCAD App.Document
         """
         try:
-            cmd = FreeCADGui.Command.get("Silo_Info")
-            if cmd:
-                cmd.Activated()
+            FreeCADGui.runCommand("Silo_Info")
         except Exception as e:
             FreeCAD.Console.PrintError(f"Silo info failed: {e}\n")
 
@@ -545,9 +531,7 @@ class SiloOrigin:
             doc: FreeCAD App.Document
         """
         try:
-            cmd = FreeCADGui.Command.get("Silo_BOM")
-            if cmd:
-                cmd.Activated()
+            FreeCADGui.runCommand("Silo_BOM")
         except Exception as e:
             FreeCAD.Console.PrintError(f"Silo BOM failed: {e}\n")
 

freecad/silo_start.py

@@ -0,0 +1,444 @@
+"""Silo Start Page — dual-mode start view for Kindred Create.
+
+Replaces the default Start page with either:
+- A QWebEngineView showing the Silo web app (when Silo is reachable)
+- A native Qt offline fallback with recent files and connectivity status
+
+The command override is activated by calling ``register()`` at module level
+from InitGui.py, which overwrites the C++ ``Start_Start`` command.
+"""
+
+import os
+import ssl
+import urllib.error
+import urllib.parse
+import urllib.request
+from datetime import datetime
+from pathlib import Path
+
+import FreeCAD
+import FreeCADGui
+from PySide import QtCore, QtGui, QtWidgets
+
+# Try to import QtWebEngineWidgets — not all builds ship it
+_HAS_WEBENGINE = False
+try:
+    from PySide import QtWebEngineWidgets
+
+    _HAS_WEBENGINE = True
+except ImportError:
+    FreeCAD.Console.PrintLog(
+        "Silo Start: QtWebEngineWidgets not available, using offline mode only\n"
+    )
+
+# ---------------------------------------------------------------------------
+# Catppuccin Mocha palette
+# ---------------------------------------------------------------------------
+_MOCHA = {
+    "base": "#1e1e2e",
+    "mantle": "#181825",
+    "crust": "#11111b",
+    "surface0": "#313244",
+    "surface1": "#45475a",
+    "surface2": "#585b70",
+    "text": "#cdd6f4",
+    "subtext0": "#a6adc8",
+    "subtext1": "#bac2de",
+    "blue": "#89b4fa",
+    "green": "#a6e3a1",
+    "red": "#f38ba8",
+    "peach": "#fab387",
+    "lavender": "#b4befe",
+    "overlay0": "#6c7086",
+}
+
+_PREF_GROUP = "User parameter:BaseApp/Preferences/Mod/KindredSilo"
+_POLL_INTERVAL_MS = 5000
+_CONNECT_TIMEOUT_S = 2
+
+
+# ---------------------------------------------------------------------------
+# Helpers
+# ---------------------------------------------------------------------------
+
+
+def _get_silo_base_url() -> str:
+    """Return the Silo web UI root URL (without /api)."""
+    param = FreeCAD.ParamGet(_PREF_GROUP)
+    url = param.GetString("ApiUrl", "")
+    if not url:
+        url = os.environ.get("SILO_API_URL", "http://localhost:8080/api")
+    url = url.rstrip("/")
+    # Strip trailing /api to get the web root
+    if url.endswith("/api"):
+        url = url[:-4]
+    return url
+
+
+def _get_ssl_context() -> ssl.SSLContext:
+    """Build an SSL context respecting the Silo SSL preference."""
+    param = FreeCAD.ParamGet(_PREF_GROUP)
+    if param.GetBool("SslVerify", True):
+        return ssl.create_default_context()
+    ctx = ssl.create_default_context()
+    ctx.check_hostname = False
+    ctx.verify_mode = ssl.CERT_NONE
+    return ctx
+
+
+def _check_connectivity(url: str) -> bool:
+    """HEAD-request the Silo base URL, return True if reachable."""
+    try:
+        req = urllib.request.Request(url, method="HEAD")
+        req.add_header("User-Agent", "kindred-create/1.0")
+        urllib.request.urlopen(req, timeout=_CONNECT_TIMEOUT_S, context=_get_ssl_context())
+        return True
+    except Exception:
+        return False
+
+
+def _get_recent_files() -> list:
+    """Read recent files from FreeCAD preferences."""
+    group = FreeCAD.ParamGet("User parameter:BaseApp/Preferences/RecentFiles")
+    count = group.GetInt("RecentFiles", 0)
+    files = []
+    for i in range(count):
+        path = group.GetString(f"MRU{i}", "")
+        if path and os.path.exists(path):
+            p = Path(path)
+            mtime = datetime.fromtimestamp(p.stat().st_mtime)
+            files.append({"path": str(p), "name": p.name, "modified": mtime})
+    return files
+
+
+# ---------------------------------------------------------------------------
+# Offline fallback widget
+# ---------------------------------------------------------------------------
+
+
+class _OfflineWidget(QtWidgets.QWidget):
+    """Native Qt fallback showing Silo status and recent local files."""
+
+    retry_clicked = QtCore.Signal()
+
+    def __init__(self, parent=None):
+        super().__init__(parent)
+        self._build_ui()
+        self.update_status(False, _get_silo_base_url())
+
+    def _build_ui(self):
+        layout = QtWidgets.QVBoxLayout(self)
+        layout.setContentsMargins(40, 30, 40, 20)
+        layout.setSpacing(0)
+
+        # --- Status banner ---
+        banner = QtWidgets.QFrame()
+        banner.setObjectName("SiloStatusBanner")
+        banner_layout = QtWidgets.QHBoxLayout(banner)
+        banner_layout.setContentsMargins(16, 12, 16, 12)
+
+        self._status_icon = QtWidgets.QLabel()
+        self._status_icon.setFixedSize(12, 12)
+        banner_layout.addWidget(self._status_icon)
+
+        self._status_label = QtWidgets.QLabel()
+        self._status_label.setWordWrap(True)
+        banner_layout.addWidget(self._status_label, 1)
+
+        self._retry_btn = QtWidgets.QPushButton("Retry")
+        self._retry_btn.setFixedWidth(80)
+        self._retry_btn.setCursor(QtCore.Qt.PointingHandCursor)
+        self._retry_btn.clicked.connect(self.retry_clicked.emit)
+        banner_layout.addWidget(self._retry_btn)
+
+        layout.addWidget(banner)
+        layout.addSpacing(24)
+
+        # --- Recent files header ---
+        header = QtWidgets.QLabel("Recent Files")
+        header.setObjectName("SiloRecentHeader")
+        layout.addWidget(header)
+        layout.addSpacing(12)
+
+        # --- Recent files list ---
+        self._file_list = QtWidgets.QListWidget()
+        self._file_list.setObjectName("SiloRecentList")
+        self._file_list.setHorizontalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
+        self._file_list.itemDoubleClicked.connect(self._on_file_clicked)
+        layout.addWidget(self._file_list, 1)
+
+        layout.addSpacing(16)
+
+        # --- Footer ---
+        footer = QtWidgets.QHBoxLayout()
+        footer.addStretch()
+        self._startup_cb = QtWidgets.QCheckBox("Don't show this page on startup")
+        start_prefs = FreeCAD.ParamGet("User parameter:BaseApp/Preferences/Mod/Start")
+        show = start_prefs.GetBool("ShowOnStartup", True)
+        self._startup_cb.setChecked(not show)
+        self._startup_cb.toggled.connect(self._on_startup_toggled)
+        footer.addWidget(self._startup_cb)
+        layout.addLayout(footer)
+
+        self._apply_style()
+
+    def _apply_style(self):
+        self.setStyleSheet(f"""
+            _OfflineWidget {{
+                background-color: {_MOCHA["base"]};
+            }}
+            #SiloStatusBanner {{
+                background-color: {_MOCHA["surface0"]};
+                border-radius: 8px;
+            }}
+            #SiloStatusBanner QLabel {{
+                color: {_MOCHA["text"]};
+                font-size: 13px;
+            }}
+            #SiloStatusBanner QPushButton {{
+                background-color: {_MOCHA["blue"]};
+                color: {_MOCHA["crust"]};
+                border: none;
+                border-radius: 4px;
+                padding: 6px 12px;
+                font-weight: bold;
+                font-size: 12px;
+            }}
+            #SiloStatusBanner QPushButton:hover {{
+                background-color: {_MOCHA["lavender"]};
+            }}
+            #SiloRecentHeader {{
+                color: {_MOCHA["text"]};
+                font-size: 20px;
+                font-weight: bold;
+            }}
+            #SiloRecentList {{
+                background-color: {_MOCHA["mantle"]};
+                border: 1px solid {_MOCHA["surface0"]};
+                border-radius: 6px;
+                padding: 4px;
+            }}
+            #SiloRecentList::item {{
+                padding: 10px 12px;
+                border-bottom: 1px solid {_MOCHA["surface0"]};
+                color: {_MOCHA["text"]};
+            }}
+            #SiloRecentList::item:last {{
+                border-bottom: none;
+            }}
+            #SiloRecentList::item:hover {{
+                background-color: {_MOCHA["surface0"]};
+            }}
+            #SiloRecentList::item:selected {{
+                background-color: {_MOCHA["surface1"]};
+            }}
+            QCheckBox {{
+                color: {_MOCHA["subtext0"]};
+                font-size: 12px;
+            }}
+            QCheckBox::indicator {{
+                width: 14px;
+                height: 14px;
+            }}
+        """)
+
+    def update_status(self, connected: bool, url: str, error: str = ""):
+        if connected:
+            self._status_icon.setStyleSheet(
+                f"background-color: {_MOCHA['green']}; border-radius: 6px;"
+            )
+            self._status_label.setText(f"Silo connected — {url}")
+            self._retry_btn.hide()
+        else:
+            self._status_icon.setStyleSheet(
+                f"background-color: {_MOCHA['red']}; border-radius: 6px;"
+            )
+            msg = f"Silo not reachable — {url}"
+            if error:
+                msg += f"  ({error})"
+            if not _HAS_WEBENGINE:
+                msg += "  [WebEngine not available]"
+            self._status_label.setText(msg)
+            self._retry_btn.show()
+
+    def refresh_recent_files(self):
+        self._file_list.clear()
+        files = _get_recent_files()
+        if not files:
+            item = QtWidgets.QListWidgetItem("No recent files")
+            item.setFlags(QtCore.Qt.NoItemFlags)
+            self._file_list.addItem(item)
+            return
+        for f in files:
+            label = f"{f['name']}\n{f['path']}\nModified: {f['modified']:%Y-%m-%d %H:%M}"
+            item = QtWidgets.QListWidgetItem(label)
+            item.setData(QtCore.Qt.UserRole, f["path"])
+            self._file_list.addItem(item)
+
+    def _on_file_clicked(self, item: QtWidgets.QListWidgetItem):
+        path = item.data(QtCore.Qt.UserRole)
+        if path:
+            try:
+                FreeCADGui.open(path)
+            except Exception as e:
+                FreeCAD.Console.PrintError(f"Silo Start: failed to open {path}: {e}\n")
+
+    @staticmethod
+    def _on_startup_toggled(checked: bool):
+        prefs = FreeCAD.ParamGet("User parameter:BaseApp/Preferences/Mod/Start")
+        prefs.SetBool("ShowOnStartup", not checked)
+
+
+# ---------------------------------------------------------------------------
+# Web engine page (navigation filter)
+# ---------------------------------------------------------------------------
+
+if _HAS_WEBENGINE:
+
+    class _SiloPage(QtWebEngineWidgets.QWebEnginePage):
+        """Custom page that keeps navigation within the Silo origin."""
+
+        def __init__(self, silo_origin: str, parent=None):
+            super().__init__(parent)
+            self._silo_origin = silo_origin
+
+        def acceptNavigationRequest(self, url, nav_type, is_main_frame):
+            if nav_type == QtWebEngineWidgets.QWebEnginePage.NavigationTypeLinkClicked:
+                target = url.toString()
+                if not target.startswith(self._silo_origin):
+                    QtGui.QDesktopServices.openUrl(url)
+                    return False
+            return super().acceptNavigationRequest(url, nav_type, is_main_frame)
+
+
+# ---------------------------------------------------------------------------
+# Main start view
+# ---------------------------------------------------------------------------
+
+
+class SiloStartView(QtWidgets.QWidget):
+    """Dual-mode start page: Silo webview (online) / offline fallback."""
+
+    def __init__(self, parent=None):
+        super().__init__(parent)
+        self.setObjectName("SiloStartView")
+
+        self._silo_url = _get_silo_base_url()
+        self._connected = False
+
+        # Stack: page 0 = webview (or placeholder), page 1 = offline
+        self._stack = QtWidgets.QStackedWidget(self)
+        root_layout = QtWidgets.QVBoxLayout(self)
+        root_layout.setContentsMargins(0, 0, 0, 0)
+        root_layout.addWidget(self._stack)
+
+        # Page 0: web view
+        self._web_view = None
+        if _HAS_WEBENGINE:
+            self._web_view = QtWebEngineWidgets.QWebEngineView()
+            page = _SiloPage(self._silo_url, self._web_view)
+            self._web_view.setPage(page)
+            self._stack.addWidget(self._web_view)  # index 0
+        else:
+            # placeholder so indices stay consistent
+            placeholder = QtWidgets.QWidget()
+            self._stack.addWidget(placeholder)  # index 0
+
+        # Page 1: offline fallback
+        self._offline = _OfflineWidget()
+        self._offline.retry_clicked.connect(self._check_now)
+        self._offline.refresh_recent_files()
+        self._stack.addWidget(self._offline)  # index 1
+
+        # Start on offline page, then check connectivity
+        self._stack.setCurrentIndex(1)
+
+        # Connectivity polling timer
+        self._poll_timer = QtCore.QTimer(self)
+        self._poll_timer.setInterval(_POLL_INTERVAL_MS)
+        self._poll_timer.timeout.connect(self._poll)
+        self._poll_timer.start()
+
+        # Immediate first check
+        QtCore.QTimer.singleShot(0, self._check_now)
+
+    def _check_now(self):
+        """Run an immediate connectivity check and update the view."""
+        self._silo_url = _get_silo_base_url()
+        connected = _check_connectivity(self._silo_url)
+        self._set_connected(connected)
+
+    def _poll(self):
+        """Periodic connectivity check."""
+        self._silo_url = _get_silo_base_url()
+        connected = _check_connectivity(self._silo_url)
+        self._set_connected(connected)
+
+    def _set_connected(self, connected: bool):
+        if connected == self._connected:
+            return
+        self._connected = connected
+        if connected and self._web_view:
+            self._web_view.setUrl(QtCore.QUrl(self._silo_url))
+            self._stack.setCurrentIndex(0)
+            FreeCAD.Console.PrintLog(f"Silo Start: connected to {self._silo_url}\n")
+        else:
+            self._offline.update_status(False, self._silo_url)
+            self._offline.refresh_recent_files()
+            self._stack.setCurrentIndex(1)
+            if not connected:
+                FreeCAD.Console.PrintLog(f"Silo Start: cannot reach {self._silo_url}\n")
+        self._offline.update_status(connected, self._silo_url)
+
+
+# ---------------------------------------------------------------------------
+# Command override
+# ---------------------------------------------------------------------------
+
+
+class _SiloStartCommand:
+    """Replacement for the C++ Start_Start command."""
+
+    def Activated(self):
+        mw = FreeCADGui.getMainWindow()
+        mdi = mw.findChild(QtWidgets.QMdiArea)
+        if not mdi:
+            return
+
+        # Reuse existing view if open
+        for sw in mdi.subWindowList():
+            if sw.widget() and sw.widget().objectName() == "SiloStartView":
+                mdi.setActiveSubWindow(sw)
+                sw.show()
+                return
+
+        # Create new view as MDI subwindow
+        view = SiloStartView()
+        sw = mdi.addSubWindow(view)
+        sw.setWindowTitle("Start")
+        sw.setWindowIcon(QtGui.QIcon(":/icons/StartCommandIcon.svg"))
+        sw.show()
+        mdi.setActiveSubWindow(sw)
+
+    def GetResources(self):
+        return {
+            "MenuText": "&Start Page",
+            "ToolTip": "Displays the start page",
+            "Pixmap": "StartCommandIcon",
+        }
+
+    def IsActive(self):
+        return True
+
+
+def register():
+    """Override the Start_Start command with the Silo start page.
+
+    Call this from InitGui.py at module level so the override is in
+    place before the C++ StartLauncher fires (100ms after GUI init).
+    """
+    try:
+        FreeCADGui.addCommand("Start_Start", _SiloStartCommand())
+        FreeCAD.Console.PrintMessage("Silo Start: registered start page override\n")
+    except Exception as e:
+        FreeCAD.Console.PrintWarning(f"Silo Start: failed to register override: {e}\n")