chore(monorepo/client): move client source files

apps/client/src/widgets/tab_aware_widget.js

@@ -0,0 +1,53 @@
+import BasicWidget from "./basic_widget.js";
+
+/**
+ * Base class for widgets that need to track the active tab/note
+ */
+export default class TabAwareWidget extends BasicWidget {
+    constructor() {
+        super();
+        this.noteId = null;
+        this.noteType = null;
+        this.notePath = null;
+        this.isActiveTab = false;
+    }
+
+    /**
+     * Called when the active note is switched
+     *
+     * @param {string} noteId
+     * @param {string|null} noteType
+     * @param {string|null} notePath
+     */
+    async noteSwitched(noteId, noteType, notePath) {
+        this.noteId = noteId;
+        this.noteType = noteType;
+        this.notePath = notePath;
+    }
+
+    /**
+     * Called when the widget's tab becomes active or inactive
+     *
+     * @param {boolean} active
+     */
+    activeTabChanged(active) {
+        this.isActiveTab = active;
+    }
+
+    /**
+     * Called when entities (notes, attributes, etc.) are reloaded
+     */
+    entitiesReloaded() {}
+
+    /**
+     * Check if this widget is enabled
+     */
+    isEnabled() {
+        return true;
+    }
+
+    /**
+     * Refresh widget with current data
+     */
+    async refresh() {}
+}