refactor: migrate ztools and Silo to kindred-addon-sdk (#250)

Route platform API calls through kindred_sdk wrappers:

ZTools:
- Replace hardcoded MOCHA dict with kindred_sdk.get_theme_tokens()
- Add sdk dependency to package.xml

Silo:
- Replace FreeCADGui.registerEditingOverlay() with kindred_sdk.register_overlay()
- Replace FreeCADGui.addOrigin()/removeOrigin() with kindred_sdk wrappers
- Replace hardcoded _MOCHA palette subset with kindred_sdk.get_theme_tokens()
- Add sdk dependency to package.xml

Create module:
- Replace dock panel boilerplate with kindred_sdk.register_dock_panel()

Behavior is identical before and after — this is a refactor only.

Closes #250

src/Mod/Create/InitGui.py

@@ -55,26 +55,17 @@ def _register_silo_origin():
 def _setup_silo_auth_panel():
     """Dock the Silo authentication panel in the right-hand side panel."""
     try:
-        from PySide import QtCore, QtWidgets
-
-        mw = FreeCADGui.getMainWindow()
-        if mw is None:
-            return
-
-        # Don't create duplicate panels
-        if mw.findChild(QtWidgets.QDockWidget, "SiloDatabaseAuth"):
-            return
+        from kindred_sdk import register_dock_panel
 
+        def _factory():
             import silo_commands
 
             auth = silo_commands.SiloAuthDockWidget()
+            # Prevent GC of the auth timer by stashing on the widget
+            auth.widget._auth = auth
+            return auth.widget
 
-        panel = QtWidgets.QDockWidget("Database Auth", mw)
-        panel.setObjectName("SiloDatabaseAuth")
-        panel.setWidget(auth.widget)
-        # Keep the auth object alive so its QTimer isn't destroyed while running
-        panel._auth = auth
-        mw.addDockWidget(QtCore.Qt.RightDockWidgetArea, panel)
+        register_dock_panel("SiloDatabaseAuth", "Database Auth", _factory)
     except Exception as e:
         FreeCAD.Console.PrintLog(f"Create: Silo auth panel skipped: {e}\n")
 
@@ -82,22 +73,13 @@ def _setup_silo_auth_panel():
 def _setup_silo_activity_panel():
     """Show a dock widget with recent Silo database activity."""
     try:
-        from PySide import QtCore, QtWidgets
+        from kindred_sdk import register_dock_panel
 
-        mw = FreeCADGui.getMainWindow()
-        if mw is None:
-            return
-
-        # Don't create duplicate panels
-        if mw.findChild(QtWidgets.QDockWidget, "SiloDatabaseActivity"):
-            return
-
-        panel = QtWidgets.QDockWidget("Database Activity", mw)
-        panel.setObjectName("SiloDatabaseActivity")
+        def _factory():
+            from PySide import QtWidgets
 
             widget = QtWidgets.QWidget()
             layout = QtWidgets.QVBoxLayout(widget)
-
             activity_list = QtWidgets.QListWidget()
             layout.addWidget(activity_list)
 
@@ -118,13 +100,9 @@ def _setup_silo_activity_panel():
             except Exception:
                 activity_list.addItem("(Unable to connect to Silo database)")
 
-        panel.setWidget(widget)
-        mw.addDockWidget(QtCore.Qt.RightDockWidgetArea, panel)
+            return widget
 
-        # Give the activity panel most of the vertical space
-        auth_panel = mw.findChild(QtWidgets.QDockWidget, "SiloDatabaseAuth")
-        if auth_panel:
-            mw.resizeDocks([auth_panel, panel], [120, 500], QtCore.Qt.Vertical)
+        register_dock_panel("SiloDatabaseActivity", "Database Activity", _factory)
     except Exception as e:
         FreeCAD.Console.PrintLog(f"Create: Silo activity panel skipped: {e}\n")