chore(client/lightweight): basic CLS implementation

apps/client/src/lightweight/cls_provider.ts

@@ -0,0 +1,33 @@
+import { ExecutionContext } from "@triliumnext/core";
+
+export default class BrowserExecutionContext implements ExecutionContext {
+    private store: Map<string, any> | null = null;
+
+    get<T = any>(key: string): T | undefined {
+        return this.store?.get(key);
+    }
+
+    set(key: string, value: any): void {
+        if (!this.store) {
+            throw new Error("ExecutionContext not initialized");
+        }
+        this.store.set(key, value);
+    }
+
+    reset(): void {
+        this.store = null;
+    }
+
+    init<T>(callback: () => T): T {
+        // Create a fresh context for this request
+        const prev = this.store;
+        this.store = new Map();
+
+        try {
+            return callback();
+        } finally {
+            // Always clean up
+            this.store = prev;
+        }
+    }
+}