Move thread: and id: prefixing to server side.

This paves way for better news: support

server/src/nm.rs

@@ -80,7 +80,7 @@ pub async fn search(
                 .0
                 .into_iter()
                 .map(|ts| ThreadSummary {
-                    thread: ts.thread,
+                    thread: format!("thread:{}", ts.thread),
                     timestamp: ts.timestamp,
                     date_relative: ts.date_relative,
                     matched: ts.matched,
@@ -248,7 +248,7 @@ pub async fn thread(
         // TODO(wathiede): parse message and fill out attachments
         let attachments = extract_attachments(&m, &id)?;
         messages.push(Message {
-            id,
+            id: format!("id:{id}"),
             from,
             to,
             cc,
@@ -752,3 +752,16 @@ fn render_content_type_tree(m: &ParsedMail) -> String {
         SKIP_HEADERS.join("\n  ")
     )
 }
+
+pub async fn set_read_status<'ctx>(
+    nm: &Notmuch,
+    query: String,
+    unread: bool,
+) -> Result<bool, ServerError> {
+    if unread {
+        nm.tag_add("unread", &format!("{query}"))?;
+    } else {
+        nm.tag_remove("unread", &format!("{query}"))?;
+    }
+    Ok(true)
+}