fix(daily): use midnight when creating file for non-today date

src/cli/commands/daily.rs

@@ -65,7 +65,14 @@ pub fn run(date: Option<String>) -> Result<(), StreamdError> {
         Command::new(&editor).arg(file_path).status()?;
     } else {
         let now_local = Utc::now().with_timezone(&tz);
-        let file_name = now_local.format("%Y%m%d-%H%M%S_daily.md").to_string();
+        let file_timestamp = if target_date == now_local.date_naive() {
+            now_local
+        } else {
+            tz.from_local_datetime(&NaiveDateTime::new(target_date, NaiveTime::MIN))
+                .earliest()
+                .unwrap()
+        };
+        let file_name = file_timestamp.format("%Y%m%d-%H%M%S_daily.md").to_string();
         let file_path = base_folder.join(&file_name);
         fs::write(&file_path, "# ")?;
         Command::new(&editor).arg(&file_path).status()?;