desktop: rustfmt the pull tests; run fmt after clippy/test

Two macro-argument splits and a stray blank line, applied verbatim from run
2900's cargo fmt --check diff.

Also reorders the Linux job so `cargo fmt --check` runs AFTER clippy and the
tests. Fail-fast ordering would normally put the cheapest check first, but
there is no Rust toolchain on the workstation, so this lane is verified
entirely in CI — and a formatting nit failing first SKIPS clippy and the
tests, making a whole cycle teach nothing but whitespace. That has now cost
four cycles in this session alone. It still runs before the 20-40 minute
bundle build, so a fmt failure doesn't burn that either.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SreJkbxB4gx8pPsu8QbLPi

desktop/src-tauri/src/sync/pull.rs

@@ -528,7 +528,10 @@ mod tests {
         apply_page(&conn, &page(vec![n], vec![], 1)).expect("apply");
         assert_eq!(count(&conn, "SELECT COUNT(*) FROM labels"), 1);
         assert_eq!(
-            count(&conn, "SELECT via_tag FROM note_labels WHERE note_id = 'n1'"),
+            count(
+                &conn,
+                "SELECT via_tag FROM note_labels WHERE note_id = 'n1'"
+            ),
             1,
             "via_tag is applied verbatim, not re-derived"
         );
@@ -592,12 +595,15 @@ mod tests {
 
         assert_eq!(count(&conn, "SELECT COUNT(*) FROM labels"), 1);
         let label_id: String = conn
-            .query_row("SELECT label_id FROM note_labels WHERE note_id = 'n1'", [], |r| r.get(0))
+            .query_row(
+                "SELECT label_id FROM note_labels WHERE note_id = 'n1'",
+                [],
+                |r| r.get(0),
+            )
             .expect("membership survived");
         assert_eq!(label_id, "server-id", "membership re-pointed, not dropped");
     }
 
-
     #[test]
     fn label_tombstone_deletes_and_cascades_memberships() {
         let conn = db();