chore(monorepo): relocate client files

apps/client/src/widgets/containers/left_pane_container.ts

@@ -0,0 +1,31 @@
+import options from "../../services/options.js";
+import FlexContainer from "./flex_container.js";
+import appContext, { type EventData } from "../../components/app_context.js";
+import type Component from "../../components/component.js";
+
+export default class LeftPaneContainer extends FlexContainer<Component> {
+    constructor() {
+        super("column");
+
+        this.id("left-pane");
+        this.css("height", "100%");
+        this.collapsible();
+    }
+
+    isEnabled() {
+        return super.isEnabled() && options.is("leftPaneVisible");
+    }
+
+    entitiesReloadedEvent({ loadResults }: EventData<"entitiesReloaded">) {
+        if (loadResults.isOptionReloaded("leftPaneVisible")) {
+            const visible = this.isEnabled();
+            this.toggleInt(visible);
+
+            if (visible) {
+                this.triggerEvent("focusTree", {});
+            } else {
+                this.triggerEvent("focusOnDetail", { ntxId: appContext.tabManager.getActiveContext()?.ntxId });
+            }
+        }
+    }
+}