From 28a66562a2fcf6a9fb1557b8014da83f32c22e1f Mon Sep 17 00:00:00 2001
From: "google-labs-jules[bot]"
 <161369871+google-labs-jules[bot]@users.noreply.github.com>
Date: Sun, 9 Aug 2026 10:09:45 +0000
Subject: [PATCH] perf(storage): offload file pruning to background thread

Moves the synchronous file I/O logic in `run_backups` to a background thread (`std::thread::spawn`) so that deleting old snapshots or deleted-sheets files does not block the main thread execution.

Co-authored-by: Horizontal42 <75383519+Horizontal42@users.noreply.github.com>
---
 src-tauri/src/main.rs | 32 ++++++++++++++++++--------------
 1 file changed, 18 insertions(+), 14 deletions(-)

diff --git a/src-tauri/src/main.rs b/src-tauri/src/main.rs
index 74c4642..4436f39 100644
--- a/src-tauri/src/main.rs
+++ b/src-tauri/src/main.rs
@@ -477,24 +477,28 @@ fn run_backups(app: AppHandle, dir: Option<String>, retention_days: u32) -> Resu
         })
         .collect();
     snaps.sort();
-    if snaps.len() > SNAPSHOT_KEEP {
-        for old in &snaps[..snaps.len() - SNAPSHOT_KEEP] {
-            fs::remove_file(old).ok();
-        }
-    }
 
-    // prune the deleted-sheets bin by age
-    let cutoff =
-        SystemTime::now() - std::time::Duration::from_secs(u64::from(retention_days) * 86400);
-    if let Ok(entries) = fs::read_dir(bdir.join("deleted")) {
-        for entry in entries.flatten() {
-            if let Ok(meta) = entry.metadata() {
-                if meta.modified().map(|m| m < cutoff).unwrap_or(false) {
-                    fs::remove_file(entry.path()).ok();
+    std::thread::spawn(move || {
+        if snaps.len() > SNAPSHOT_KEEP {
+            for old in &snaps[..snaps.len() - SNAPSHOT_KEEP] {
+                fs::remove_file(old).ok();
+            }
+        }
+
+        // prune the deleted-sheets bin by age
+        let cutoff =
+            SystemTime::now() - std::time::Duration::from_secs(u64::from(retention_days) * 86400);
+        if let Ok(entries) = fs::read_dir(bdir.join("deleted")) {
+            for entry in entries.flatten() {
+                if let Ok(meta) = entry.metadata() {
+                    if meta.modified().map(|m| m < cutoff).unwrap_or(false) {
+                        fs::remove_file(entry.path()).ok();
+                    }
                 }
             }
         }
-    }
+    });
+
     Ok(())
 }