feat: basic chat flow

src-tauri/src/common.rs

@@ -0,0 +1,12 @@
+use nostr_sdk::prelude::*;
+
+pub fn is_target(target: &PublicKey, tags: &Vec<Tag>) -> bool {
+	for tag in tags {
+		if let Some(TagStandard::PublicKey { public_key, .. }) = tag.as_standardized() {
+			if public_key == target {
+				return true;
+			}
+		}
+	}
+	false
+}