Remove obsolete implementation and simplify project structure

src/anyimage/preferences.py

@@ -0,0 +1,57 @@
+import bpy
+
+from .runtime import DEFAULT_STORAGE_ROOT, runtime
+from .properties import device_enum_items
+
+
+class AnyImagePreferences(bpy.types.AddonPreferences):
+    bl_idname = __package__
+
+    storage_root: bpy.props.StringProperty(
+        name="Storage Root",
+        description=(
+            "Shared user-writable storage for the environment, models and jobs; "
+            "all Blender versions can use the same directory"
+        ),
+        subtype="DIR_PATH",
+        default=str(DEFAULT_STORAGE_ROOT),
+    )
+    device: bpy.props.EnumProperty(
+        name="Device",
+        description=(
+            "Inference device used by production tasks; only devices supported "
+            "on this machine are listed"
+        ),
+        items=device_enum_items,
+        default=0,
+    )
+
+    def draw(self, _context):
+        layout = self.layout
+        layout.prop(self, "storage_root")
+        layout.prop(self, "device")
+        layout.separator()
+        layout.label(text=f"Environment: {runtime.environment_directory()}")
+        if runtime.environment_ready():
+            layout.label(text="Environment is installed", icon="CHECKMARK")
+        else:
+            install_row = layout.row()
+            install_row.enabled = runtime.active_job is None
+            install_row.operator(
+                "anyimage.install_environment",
+                text="Install Environment",
+                icon="IMPORT",
+            )
+            mirror_row = layout.row()
+            mirror_row.enabled = runtime.active_job is None
+            mirror_row.operator(
+                "anyimage.install_environment_mirror",
+                text="Install Environment (Mirror)",
+                icon="IMPORT",
+            )
+        layout.separator()
+        layout.operator(
+            "anyimage.open_server_log",
+            text="Open Server Log",
+            icon="TEXT",
+        )